Relevant bibliographies by topics / Dry matter production

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Dry matter production'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "Dry matter production"

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Ragab, R., F. Beese, and W. Ehlers. "A Soil Water Balance and Dry Matter Production Model: II. Dry Matter Production of Oat." Agronomy Journal 82, no. 1 (January 1990): 157–61. http://dx.doi.org/10.2134/agronj1990.00021962008200010034x.

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Friend, D., and R. H. V. Corley. "Measuring Coconut Palm Dry Matter Production." Experimental Agriculture 30, no. 02 (April 1994): 223. http://dx.doi.org/10.1017/s0014479700024169.

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SONG, Xiang fu, Waichi AGATA, and Yoshinobu KAWAMITSU. "Studies on dry matter and grain production of F1 hybrid rice in China. I. Characteristics of dry matter production." Japanese journal of crop science 59, no. 1 (1990): 19–28. http://dx.doi.org/10.1626/jcs.59.19.

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ABOAGYE, Lawrence Misa, Akihiro ISODA, Hiroshi NOJIMA, Yasuo TAKASAKI, Takao YOSHIMURA, and Toshio ISHIKAWA. "Plant Type and Dry Matter Production in Peanut(Arachis hypogaea L.) Cultivars. I. Varietal differences in dry matter production." Japanese journal of crop science 63, no. 2 (1994): 289–97. http://dx.doi.org/10.1626/jcs.63.289.

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ONAHA, Anyu, Hidekazu IKEMIYA, and Fukunori NAKASONE. "Studies on the Dry Matter Production of Pineapple; Relationships between Dry Matter Productions and an Establishing Process of Yield." Journal of the Japanese Society for Horticultural Science 54, no. 4 (1986): 438–49. http://dx.doi.org/10.2503/jjshs.54.438.

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Balick, Michael J., and Anthony Β. Anderson. "Dry matter allocation in Jessenia bataua (PALMAE)." Acta Amazonica 16 (1986): 135–40. http://dx.doi.org/10.1590/1809-43921986161140.

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There are few assessments of lifetime dry matter production for tropical trees. However, several studies, have been carried out for palms. This study measures dry matter production for Jessenia bataua,a useful palm common in many areas of the Amazon Valley. Palms In the Ducke Forest Reserve Of INPA were studied. Approximately 34% of total aboveground dry matter production in this palm was, alllocated to reproductive effort, eg., the production of in florescences and fruits. The meaning of this percentage, to discussed, relative to percentages identified in other Neotropical palms.
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Manrique, L. A., J. R. Kinry, T. Hodges, and D. S. Axness. "Dry Matter Production and Radiation Interception of Potato." Crop Science 31, no. 4 (July 1991): 1044–49. http://dx.doi.org/10.2135/cropsci1991.0011183x003100040040x.

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Shi, Li Jun, Miao Huang, Wei Yu Zhang, and Hui Fen Liu. "Effect of Dry Matter Concentration on Dry Anaerobic Digestion of Animal Manure and Straw." Applied Mechanics and Materials 253-255 (December 2012): 897–902. http://dx.doi.org/10.4028/www.scientific.net/amm.253-255.897.

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In this paper anaerobic digestion of dairy manure and straw was conducted to produce biogas. Under the conditions of C/N=25-30 and T=36°C, five kinds of dry matter concentration of 20%, 15%, 10%, 5% and 2.5% were tested to investigate the effect of dry matter concentration on anaerobic digestion. The result showed that first 30 days was the biogas production peak phase and VFA concentrations in the leachate were also high during the same period. When dry matter concentration increased, biogas production appeared larger fluctuation, and alkalinity and NH4+-N concentration in the leachate also increased with higher organic loading rate. Among five kinds of dry matter concentration, 10% was more suitable for anaerobic digestion to produce biogas with total biogas production amount of 4710 mL after 30 days and volumetric biogas yield of 0.313 m3•m-3•d-1. These results could provide instructive meaning to the engineering application of dry anaerobic digestion.
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ITO, Koji, and Shinobu INANAGA. "Studies on dry matter production of Napiergrass. IV. Direct- and after-effects of temperature on leaf growth and dry matter production." Japanese journal of crop science 57, no. 4 (1988): 699–707. http://dx.doi.org/10.1626/jcs.57.699.

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Kolář, L., S. Kužel, J. Peterka, P. Štindl, and V. Plát. "Agrochemical value of organic matter of fermenter wastes in biogas production." Plant, Soil and Environment 54, No. 8 (August 12, 2008): 321–28. http://dx.doi.org/10.17221/412-pse.

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We performed 28-day mesophilic fermentation of a mixture of pig slurry and primary (raw) sludge from the sedimentation stage of a wastewater treatment plant at a 1:1 ratio. The components and the original and fermented mixture of slurry and sludge were subjected to acid hydrolysis. Dry matter of the solid phase of both components and both mixtures was incubated with sandy-loamy Cambisol at a weight ratio 3:1 at 25°C for 20 weeks; in 14-day intervals lipids, crude protein, hemicelluloses, cellulose, lignin, total nitrogen and hot-water-insoluble solids were determined. Changes in ion-exchange and buffering capacity of the test materials were recorded. Labile organic matters were determined after 20 weeks of incubation. Liquid fractions of both components and their mixtures were analysed before and after anaerobic fermentation. It was concluded that beneficial effects of wastes as fertilisers from anaerobic digestion could be attributed to their liquid fraction. After anaerobic digestion the solid fraction of these wastes has relatively increased ion exchange capacity as well as buffering capacity but it is very stable, hardly degradable organic matter, and therefore it cannot play the role of organic matter in soil. This is the reason why it should not be considered as an organic fertiliser.
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Dissertations / Theses on the topic "Dry matter production"

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Tjelele, Tlou Julius. "Dry matter production, intake and nutritive value of certain Indigofera species." Diss., Pretoria : [s.n], 2006. http://upetd.up.ac.za/thesis/available/etd-04042007-115406.

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Shamudzarira, Zondai. "Water use and dry matter production in sorghum and bambara groundnut." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361997.

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Restrepo, P. Ricardo J. "Dry matter digestibility and VFA production of selected feedstuffs using RUSITEC /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901273.

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Ahmed, Sabah Kedar. "Yield, dry matter production, and nitrogen uptake of drip irrigated cotton." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/191143.

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The study consisted of two experiments conducted over two growing seasons. Urea ammonium nitrate was used as a source of N at rates of 50, 75, 100 and 150% of levels estimated to be ideal for maximum yield of cotton (Gossvpium hirsutum L.). The nitrogen fertilizer was applied through a drip irrigation system. The yield of seed cotton, flowering pattern, boll set, plant N uptake, and dry matter production were studied in relation to four N fertilizer rates and two plant populations in the 1984 study. Yield of seed cotton, plant N uptake and dry matter production were studied in relation to four N rates, three seeding rates, and three cotton cultivars in the 1985 study. Petiole nitrate patterns were studied both seasons. The effect of N applications on seed cotton yield was dependent upon the initial soil N and the yield possibility. In this study the lower rate of N appeared to be sufficient for the yields obtained. Thinning resulted in reduction of the total number of flowers and significantly decreased yield, but percent boll set was not affected. Nitrogen additions significantly increased plant N uptake and dry matter production as well as petiole NO₃-N levels during the growing season. The N need of cotton under drip irrigation was determined throughout the growing season by using petiole analysis. The levels of petiole NO₃-N for N sufficiency and deficiency which are accepted under furrow irrigation cotton were shown to be applicable for drip irrigated cotton. Yield of DPL-775 and DPL-90 cotton cultivars was significantly higher than that for DPL-41 cotton cultivar in 1985.
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Gonçalves, Francisco Maria da Veiga Teixeira Tello. "Estudo comparativo de leguminosas pratenses anuais." Master's thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/10937.

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Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
This essay was part of a ProDer project aiming at measuring and appreciating the natural resources. Was carried out by the Instituto Nacional de Investigação Agrária e Veterinária with Fertipadro company as partner. The main goals were the evaluation of five subterranean clover ecotypes (Trifolium subterraneum spp. brachycalycinum), two of pink serradella (Ornithopus sativus), two of yellow serradella (Ornithopus compressus) and one of biserrula (Biserrula pelecinus). Five commercial varieties of subterranean clover and one of pink serradella were sown for comparison with the new ecotypes. Dry matter production, crude protein, crude fiber and dry matter digestibility were evaluated. The results obtained seem to suggest that three of subterranean clover ecotypes and both pink serradella ecotypes present very promising production and qualitative characteristics, for the Mediterranean region
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McBeth, Lucien Reiter. "EFFECTS OF TRANSIENT VARIATION OF SILAGE DRY MATTER CONCENTRATION ON LACTATING DAIRY COWS." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345489864.

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Soto-Ortiz, Roberto. "Crop Phenology, Dry Matter Production, and Nutrient Uptake and Partitioning in Cantaloupe (Cucumis Melo L.) and Chile (Capsicum Annuum L.)." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194813.

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Currently, the information available concerning requirements for optimum crop growth and development, dry matter production, and nutrient uptake and partitioning for Cantaloupes and New Mexico chile type cultivars is limited. Such information is required to predict and identify critical stages of growth in order to develop efficient nutrient management programs for these crops. The goals of this dissertation are: 1) to obtain general irrigated cantaloupe and New Mexico chile plants development models as a function of heat units accumulated after planting (HUAP), and 2) to determine dry matter production and nutrient uptake and partitioning patterns of these crops as a function of HUAP. Four primary investigations are presented in this dissertation. In the first and second studies, plant development models for irrigated cantaloupe and New Mexico chile-type cultivars were obtained. For cantaloupe plants, early bloom occurred at 265 ± 47 HUAP, early fruit set at 381 ± 51 HUAP, early netting at 499 ± 63 HUAP, and physiological maturity at 746 ± 66 HUAP. For chile plants, first bloom occurred at 530 ± 141 HUAP, early bloom at 750 ± 170 HUAP, peak bloom at 1006 ± 145 HUAP, first green chile harvest at 1329 ± 120 HUAP, and red harvest stage at 1798 ± 58 HUAP. Also, these studies revealed that beyond the early netting stage (approximately 499 HUAP), cantaloupe fruits were the strongest sinks for dry matter accumulation. For chile plants, between the first green chile harvest and red chile harvest stages (approximately at 1550 HUAP), chile pods developed into stronger sinks for dry matter accumulation. The third and fourth investigations revealed that the period of maximum nutrient uptake coincides with that of maximum dry matter accumulation for both crops. The overall total nutrient uptake of N, P, K, Ca, Mg, S, B, Zn, Mn, Fe, and Cu for cantaloupe plants was 138, 21, 213, 132, 29, 28, 0.17, 0.20, 0.13, 2.0, and 0.06 kg ha⁻¹, for chile plants, the overall total nutrient was 216, 20, 292, 117, 56, 28, 0.31, 0.20, 0.31, 1.6 and 0.14 kg ha⁻¹ for these nutrients respectively.
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Ratnaweera, U. "Dry matter production in determinate and indeterminate cultivars of Vicia faba L. under water stress." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293825.

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Gérardeaux, Edward. "Adjustment of phenology, growth and dry matter production of cotton (Gossypium Hirsutum L.) facing potassium deficiency." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13851/document.

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La déficience en potassium dans les parcelles de cotonnier est un phénomène répandu et en recrudescence. Le problème est d’autant plus marqué en Afrique sub-saharienne que les sols sont pauvres et les systèmes de culture peu intensifs. Les principaux effets de la carence en potassium référencés dans la littérature sont une réduction de la surface foliaire, une réduction de l’assimilation et une modification des règles de répartition des assimilats entre les compartiments de la plante (tiges, racines, fruits et feuilles). Les connaissances à l’échelle cellulaire sur le rôle du potassium sont nombreuses mais paradoxalement peu de modèles permettent l’intégration de ces résultats à l’échelle du plant et du peuplement. La raison provient de la multiplicité des mécanismes affectés et de la complexité à les intégrer à l’échelle du plant ou du peuplement. L’objectif de notre travail est de caractériser les effets de la carence en K sur la croissance et le développement du cotonnier avec suffisamment de variables intermédiaires explicatives pour pouvoir proposer un schéma conceptuel compatible avec les concepts utilisés dans les modèles de croissance de cette plante. Cet objectif implique ainsi de porter nos investigations à plusieurs échelles (peuplement, plante, organes, organites) et sur des variables-clés du fonctionnement physiologiques des plantes utilisées dans la modélisation courante telles que la photosynthèse ou le statut hydrique. Nos recherches nous ont aussi amené à mesurer d’autres variables non inclues dans les modèles courant, afin d’affiner notre compréhension du fonctionnement des plantes carencées (teneurs en sucres, vitesses de carboxylation, ouvertures stomatiques …). Pour satisfaire à ces objectifs, deux types complémentaires d’expérimentations ont été menés : 1) des essais en pleins champs, en condition pluviale strictes ont été conduits au Bénin, deux années de suite, sur deux sites différents : à Aplahoué en 2004 et à Savalou en 2005. Il s’agit d’essais comparant différents niveaux de fertilisation en potassium. L’objectif de ces essais était d’étudier les effets de la carence à l’échelle du peuplement. 2) Par la suite, une expérimentation en serre et en hydroponie a été conduite (Bordeaux, 2006) dans l’objectif d’analyser finement les processus affectés à l’échelle du plant et de l’organe. Les essais en peuplement comme l’essai en serre ont permis d’obtenir des gammes de teneur en potassium variées, grâce à des niveaux d’alimentation variés (3 niveaux au champ, 4 en serre). Les teneurs planchers des plantes les plus carencées se situaient aux alentours de 8 à 10 mg Kg-1, ce qui contraste avec les teneurs maximum mesurées qui avoisinaient les 30 mg g-1. L’indice foliaire des traitements carencés des essais en peuplement est inférieur aux témoins en raison d’un moins grand nombre de feuilles et d’une taille individuelle réduite. Dans les essais en serre, une importante réduction de la surface foliaire est aussi observée mais la part de la réduction de la surface individuelle dans la réduction de la surface totale est plus prononcée. L’analyse des dynamiques de croissance des surfaces foliaires montre que l’accroissement relatif des feuilles est identique quel que soit les niveaux de carence mais que la taille des organes à l’émergence est plus petite pour les plants carencés. En revanche, les entrenœuds des plants carencés ont à la fois une taille réduite à l’émergence et une croissance relative plus faible. A l’échelle du peuplement aucune différence d’efficience de conversion de la lumière n’est observée en conséquence, les réductions de biomasse sèche observée sont entièrement dues à une diminution de l’efficience d’interception du rayonnement. En revanche, l’efficience de conversion du rayonnement interceptée de l’essai en serre est affectée par la carence en K mais uniquement pour le traitement le plus carencé
Potassium deficiency is a common phenomenon in cotton parcels. This problem is quite important in sub-Saharan Africa, where soils are poor and cropping systems are very low intensive. The main effects of potassium deficiency referenced in scientific literature are: (a) a reduction in leaf area, (b) a decrease in nutrient assimilation, and (c) a modification of nutrient repartition amongst compartments (i.e. stems roots, fruits, and leaves). Even though knowledge at the cellular level on the role of potassium is wide, ironically, only but a few models integrate results at the plant or stand levels. The reason comes from the multiplicity of mechanisms used and the complexity of integrating them throughout the plant or stand. The objective of our work is to characterize the effects of K-deficiency on the growth and development of cotton plants by including sufficient intermediate explanatory variables to provide a comparable scheme with the concepts used in growth models for this plant. This objective implies that our research focuses on different scales (i.e. stand, plant, organ, cell) and on physiological variables used in current models such as photosynthesis or water status. Our research had also led us to measure other variables not included in current models, to refine our understanding of the mechanisms of how deficient plants grows (i.e. sugar rates, carboxylation speed, stomata opening…). To meet these objectives, two complementary types of experiments were conducted: (i) field trials were performed in Benin on two different sites, Aplahoué in 2004 and Savalou in 2005, with strict rainfall conditions to compare different levels of potassium-fertilization and describe the effects of K-deficiency at the stand level. (ii) and a greenhouse hydroponic experiment was done in Bordeaux, France in 2006 to analyze the processes used throughout the plant and the organ. The field and the greenhouse tests had different levels of potassium fertilisation (2 to 3 levels in the field, 4 in the greenhouse) and gave us wide ranges of potassium contents in leaves. The minimum value of the leaf K content for the deficient plants were around 8 to 10 mg kg-1, which contrasts with the maximum values measured that were around 30 mg g-1. Potassium levels for the most deficient plants were around 8 to 10 mg Kg-1, while the highest levels measured were 30 g Kg-1. The leaf area index of deficient treatments is inferior to that of controls due to a lower number of leaves and smaller leaf sizes. In the greenhouse test, an important decrease of leaf area is observed but the proportion of the reduction due to a reduction in individual leaf size is more pronounced than in the filed experiments. The temporal analysis of the leaf area growth shows that the relative increase in size of the individual leaves is the same whatever the level of K-deficiency but that the size of the organs at emergence from apical buds is smaller for K-deficient plants. In counterpart, internodes of K-deficient plants have smaller lenght at emergence and a decreased relative growth rate. At stand level, no difference of light conversion efficiency is observed. As a result, observed reductions of dry biomass are essentially due to a decrease in light interception. However, radiation use efficiency in greenhouse tests are affected by K-deficiency but only for the most K-deficient treatment. Measures on gas exchanges made in greenhouse experiment also shows that photosynthesis is affected only for the most K-deficient treatments. This reduction is due to two concomitant effects: poor stomatal opening and a reduction in the maximum velocity of carboxylation. The relative distribution in biomass for all the tests is modified by the potassium-deficiency, benefiting leaves at the expense of the heterotrophic organs. This effect is observed at the plant level through an increase in the specific leaf weight and a relative decrease in stem and root biomass
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Kawasaki, Yohei. "Elucidation of High Yielding Soybean Characteristics through Comparison of Biomass Production Dynamics between Japanese and US Cultivars." Kyoto University, 2016. http://hdl.handle.net/2433/215606.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第19780号
農博第2176号
新制||農||1041(附属図書館)
学位論文||H28||N4996(農学部図書室)
32816
京都大学大学院農学研究科農学専攻
(主査)教授 白岩 立彦, 教授 奥本 裕, 教授 稲村 達也
学位規則第4条第1項該当
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Books on the topic "Dry matter production"

1

Henson, Ian E. Modelling dry matter production, partitioning, and yield of oil palm: OPRODSIM : a mechanistic simulation model for teaching and research : technical manual and user's guide. Kuala Lumpur, Malaysia: Malaysian Palm Oil Board, Ministry of Plantation Industries and Commodities, Malaysia, 2009.

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Motherway, Susan O'Connell. Influence og management factors on dry matter content and chemical composition of pig manure and the implications for the efficiency of manure ammonium nitrogen utilisation for silage production. Dublin: University College Dublin, 1997.

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Norberg, O. Steven. Meadowfoam oil yield as influenced by dry matter production and partitioning, flower number, and honey bee density. 1991.

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Publishing, generalsawt. Only the Strongest Man Become PRODUCTION ASSISTANTS - Funny PRODUCTION ASSISTANTS Notebook and Journal for Fathers Day and Christmas or Birthday: Lined Notebook / Journal Gift, 120 Pages, 6x9, Soft Cover, Matte Finish. Independently Published, 2020.

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Publishing, generalsawt. Only the Strongest Man Become PRODUCTION SCHEDULERS - Funny PRODUCTION SCHEDULERS Notebook and Journal for Fathers Day and Christmas or Birthday: Lined Notebook / Journal Gift, 120 Pages, 6x9, Soft Cover, Matte Finish. Independently Published, 2020.

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Publishing, generalsawt. Only the Strongest Man Become PRODUCTION PLANNERS - Funny PRODUCTION PLANNERS Notebook and Journal for Fathers Day and Christmas or Birthday: Lined Notebook / Journal Gift, 120 Pages, 6x9, Soft Cover, Matte Finish. Independently Published, 2020.

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Publishing, generalsawt. Only the Strongest Man Become PRODUCTION CLERKS - Funny PRODUCTION CLERKS Notebook and Journal for Fathers Day and Christmas or Birthday: Lined Notebook / Journal Gift, 120 Pages, 6x9, Soft Cover, Matte Finish. Independently Published, 2020.

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Publishing, generalsawt. Only the Strongest Man Become PRODUCTION ADMINISTRATORS - Funny PRODUCTION ADMINISTRATORS Notebook and Journal for Fathers Day and Christmas or Birthday: Lined Notebook / Journal Gift, 120 Pages, 6x9, Soft Cover, Matte Finish. Independently Published, 2020.

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Stewart, Dustin D. Futures of Enlightenment Poetry. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198857792.001.0001.

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This book offers a revisionist account of poetry and embodiment from Milton to Romanticism. Scholars have made much of the period's theories of matter, with some studies equating the eighteenth century's modernity with its materialism. Yet the Enlightenment in Britain also brought bold new arguments for the immateriality of spirit and evocative claims about a coming spirit realm. Protestant religious writing was of two minds about futurity, swinging back and forth between patience for the resurrected body and desire for the released soul. This ancient pattern carried over, the book argues, into understandings of poetry as a modern devotional practice. A range of authors agreed that poems can provide a foretaste of the afterlife, but they disagreed about what kind of future state the imagination should seek. The mortalist impulse-exemplified by John Milton and by Romantic poets Anna Letitia Barbauld and William Wordsworth-is to overcome the temptation of disembodiment and to restore spirit to its rightful home in matter. The spiritualist impulse-driving eighteenth-century verse by Mark Akenside, Elizabeth Singer Rowe, and Edward Young-is to break out of bodily repetition and enjoy the detached soul's freedom in advance. Although the study isolates these two tendencies, each needed the other as a source in the Enlightenment, and their productive opposition didn't end with Romanticism. The final chapter identifies an alternative Romantic vision that keeps open the possibility of a disembodied poetics, and the introduction considers present-day Anglophone writers who continue to put it to work.
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Claes, Koenraad. The Late-Victorian Little Magazine. Edinburgh University Press, 2018. http://dx.doi.org/10.3366/edinburgh/9781474426213.001.0001.

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Fed up with the commercial and moral restrictions of the mainstream press of the late Victorian era, the diverse avant-garde groups of authors and artists of the Aesthetic Movement developed a new genre of periodicals in which to propagate their principles and circulate their work. Such periodicals are known as ‘little magazines’ for their small-scale production and their circulation among limited audiences, and during the late Victorian period they were often conceptualized as integrated design project or ‘Total Works of Art’ in order to visually and materially represent the ideals of their producers. Little magazines like the Pre-Raphaelite Germ, the Arts & Crafts Hobby Horse and the Decadent Yellow Book launched the careers of innovative authors and artists and provided a site for debate between minor contributors and visiting grandees from Matthew Arnold to Oscar Wilde. This book offers detailed discussions of the background to thirteen little magazines of the Victorian Fin de Siècle, situating these within the periodical press of their day and providing interpretations of representative content items. In doing so, it outlines the earliest history of this enduring publication genre, and of the Aesthetic Movement that developed along with it.
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Book chapters on the topic "Dry matter production"

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Larcher, Walter. "Carbon Utilization and Dry Matter Production." In Physiological Plant Ecology, 57–166. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-87851-0_2.

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Larcher, Walter. "Carbon Utilization and Dry Matter Production." In Physiological Plant Ecology, 69–184. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05214-3_2.

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Silva, A. L., M. I. Marcondes, M. M. Campos, F. S. Machado, M. M. D. Castro, and A. S. Trece. "Prediction of dry matter intake in dairy calves." In Energy and protein metabolism and nutrition in sustainable animal production, 341–42. Wageningen: Wageningen Academic Publishers, 2013. http://dx.doi.org/10.3920/978-90-8686-781-3_120.

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Yamamoto, Yoshinori. "Dry Matter Production as a Basis of Starch Production in Sago Palm." In Sago Palm, 157–67. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5269-9_11.

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Xu, Lei, Peiling Yang, Shumei Ren, Tao Zhang, and Yuguo Han. "Dynamic Simulation Model for Production and Dry Matter Accumulation in Peanut." In IFIP Advances in Information and Communication Technology, 245–52. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0209-2_26.

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Sokolović, Dejan, Snežana Babić, Jordan Marković, Jasmina Radović, Zoran Lugić, Bogovid Živković, and Aleksandar Simić. "Dry Matter Production and Nutritive Value of Perennial Ryegrass Cultivars Collection." In Sustainable use of Genetic Diversity in Forage and Turf Breeding, 341–46. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8706-5_48.

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Santantonio, Dan. "Dry-Matter Partitioning and Fine-Root Production in Forests — New Approaches to a Difficult Problem." In Biomass Production by Fast-Growing Trees, 57–72. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2348-5_4.

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Samarakoon, S. P. "Effect of shade and fertilizer application on dry matter yield of medicinal plants." In Plant Nutrition for Sustainable Food Production and Environment, 637–38. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0047-9_202.

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Chen, Yuli, Zhiyou Zhang, Yan Liu, Yan Zhu, and Hongxin Cao. "Models of Dry Matter Production and Yield Formation for the Protected Tomato." In Computer and Computing Technologies in Agriculture V, 278–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27281-3_34.

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Bhattacharya, Amitav. "Dry Matter Production, Partitioning, and Seed Yield Under Soil Water Deficit: A Review." In Soil Water Deficit and Physiological Issues in Plants, 585–702. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6276-5_7.

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Conference papers on the topic "Dry matter production"

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Stepanova, Galina. "BUFFER CAPACITY OF ALFALFA DRY MATTER." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2021. http://dx.doi.org/10.33814/mak-2021-25-73-21-30.

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It was found that with an increase in the content of crude fiber, dry matter and soluble sugars by 1%, the buffer capacity of alfalfa dry matter decreases by 0.04–0.10, 0.09–0.19 and 0.16–1.44 mol/l, respectively. An increase in the content of crude protein, crude ash and crude fat by 1 % increases the buffer capacity of dry matter by 0.07–0.40, 0.19–86 and 0.33–1.11 mol/l, respectively. Therefore, to create alfalfa varieties with a reduced buffer capacity without appreciable damage to the feed value, it is necessary to conduct breeding to increase the content of soluble sugars and, possibly, reduce the content of raw fat.
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Pamungkas, Dicky, and R. Utomo. "The In Sacco Dry Matter and Organic Matter Degradability of Four Feedstuffs." In International Seminar on Livestock Production and Veterinary Technology. Indonesian Center for Animal Research and Development (ICARD), 2017. http://dx.doi.org/10.14334/proc.intsem.lpvt-2016-p.54-59.

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"Dry Matter Production and Partitioning Pattern in Sugar Beet." In Nov. 27-28, 2017 South Africa. EARES, 2017. http://dx.doi.org/10.17758/eares.eap1117246.

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Teberdiev, Dalhat, Anna Rodionova, and Sergey Zapivalov. "Floral composition and feed quality long-term hayfield." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-28-76-30-39.

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On average, for 71–75 years, the yield of long-term hayfield in the variant without fertilizers was 35.4 c/ha of dry matter, with the application of N180P45K90 — 81.8 c/ha of dry matter. The bulk of the yield is formed in the first cut — 54–76%. Over the years of research, against the background of low doses of fertilizers, the herbage was reshaped into a grassland-grass-legume-forb with the dominance of the intruded species of red fescue — 27.6–74.0%, against the background of the introduction of N120–180PK into a hay-grass-forb with dominance of foxtail meadow brome 27.2–58.6% and awnless brome 42.1–83.5%. Higher feed quality: 10.5–13.59% crude protein, 26.54–29.14% crude fibre, 9.36–10.03 MJ metabolic energy and 0.72–0.80 feed units in 1 kg of dry matter was noted in the first cut.
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Stepanova, Galina. "ALFALFA VARIETIES ZONED IN THE CENTRAL CHERNOZEM ZONE OF THE RUSSIAN FEDERATION." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-24-72-64-78.

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The article describes the main morphological and biological features of alfalfa varieties included in the State register of breeding achievements approved for use in the Central Chernozem zone of Russia. A total of 32 alfalfa varieties are included in the State register. This is 9 varieties of blue alfalfa (Medicago sativa L. subsp. Sativa) of domestic selection and 8 foreign, 11 varieties of variable alfalfa (Medicago sativa L. nothosubsp. varia (Martyn) Arcang.) domestic selection and 1 variety of foreign and 3 varieties of yellow alfalfa (Medicago sativa L. subsp. falcata (L.) Arcang.). It shows the average and maximum yield of varieties determined in the process of state variety testing, as well as independent evaluation in research institutions in the region. Varieties of blue alfalfa of domestic selection Kevsala, Elena, Satellite, Vavilovskaya Yubileynaya were the most productive. The average yield of dry matter of these varieties reaches 8.4–9.2 t/ha, the maximum — 15.3–17.7 t/ha. Alfalfa varieties Timbale and Galaxy were the most productive among foreign varieties: the average yield of dry matter was 8.1 and 8.3 t/ha, the maximum – 15.5 and 17.2 t/ha. Varieties of alfalfa variable Vitalina and Vela provided an average yield of dry matter of 7.6 and 9.0 t/ha, the maximum yield reached 15.4 and 18.1 t/ha.
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Popov, Vladimir. "Inadequate analyses and perfecting of fodder quality standards." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-28-76-198-206.

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Article is devoted the basic sources of errors at quality definition of bulky forages – by sampling, by amendments at definition of the dry matter content, to infringement of a technique of crude fiber determination. It is impossible to eliminate the errors admitted at the initial stages of the analysis using any subsequent operations and results of a forage quality estimation can appear, thus, absolutely unsuitable for successful application. In this connection questions of perfection of standardization of forage quality by the severe control over observance of a technique of forages sampling, uses of corresponding techniques of dry matter definition depending on a kind of a forage and the strict execution of all stages of a crude fiber definition are discussed. The brief information on addition of new standards with norms of NDF and ADF content for quality categories of bulky forages is given.
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Rekashus, Eduard, and Anna Makaeva. "Choosing parental pairs for development initial material of alsike clover." In Multifunctional adaptive feed production 27 (75). ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-27-75-16-22.

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The article presents the results of a study in 2021 of 13 tetraploid selective varieties of alsike clover (Trifolium hybridum L.) from Norway, Germany, Sweden, Denmark, Canada, Latvia, Belarus and Russia in terms of the productivity of air-dry matter of the standing crop and seed yield. The observations were carried out in a greenhouse experiment set up in the greenhouse complex of the Federal Williams Research Center of Forage Production & Agroecology. The purpose of the research is to choose for crossing and further breeding work the most productive tetraploid clover genotypes from different geographical regions in terms of standing crop and seed yield. The criterion for selecting promising selective numbers for crossing was the deviation of the standing crop yield and (or) seed yield by more than 3 standard deviations (σ) from the corresponding arithmetic mean in the experiment. For experimental data on the yield of air-dry matter of the standing crop, a normal distribution was characteristic, and for seed yield, an exponential distribution. This made it possible to use the critical value of 3σ in making breeding decisions. The average productivity of air-dry matter of the standing crop is 47 g/vessel, σ=16 g/vessel. The average seed productivity is 1.1 g/vessel, and σ=0.9 g/vessel. According to the value of air-dry matter of the standing crop of 102 g/vessel, selective number 56 (cv. Tetraploid from the Republic of Belarus) was identified, and according to seed yield of 4.2 g/vessel, selective number 42 (cv. Alpo from Norway). They belonged to the productivity of Novator variety 213% and 233%, respectively. Selective numbers 56 and 42 are promising for crossing and studying the ability of offspring to combine high fodder and seed productivity.
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Zhezmer, Natalya. "SPECIES COMPOSITION AND PRODUCTIVITY OF LONG-TERM MID-SEASON CEREAL GRASS STANDS AT DIFFERENT MODES OF MOWING USE." In Multifunctional adaptive feed production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-22-70-53-58.

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The use of the biological potential of self-renewal of the awnless brome and reed canary grass makes it possible to preserve the valuable species composition of long-term (23–25th years of use) mid-season agrocenoses. The productivity of grass stands against the background of the recommended doses of N90-180P20-40K100-150 fertilizers is 8.3–8.4 t/ha dry matter with two cuts and 9.1–9.6 t/ha with three cuts.
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O’Connor, E., F. M. McGovern, E. Dunne, S. J. Morrison, T. M. Boland, and N. McHugh. "704. The impact of sire on variation in methane production and dry matter intake in sheep." In World Congress on Genetics Applied to Livestock Production. The Netherlands: Wageningen Academic Publishers, 2022. http://dx.doi.org/10.3920/978-90-8686-940-4_704.

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Tyurin, Yuri, and Sergey Kostenko. "L3 — a new innovative variety winter vetch for the Ural and Central Chernozem regions of Russia." In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2021. http://dx.doi.org/10.33814/mak-2021-25-73-41-44.

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Winter vetch, shaggy provides high-protein animal feed in the spring on complexes, food from this plant is perfectly absorbed by all domestic animals. The new variety of winter shaggy vetch "L3" surpasses the existing varieties in the productivity of green mass, dry matter, and seed productivity. In terms of protein content, this variety is not inferior to most varieties. The variety is recommended for two regions, but later zoning can be expanded. The variety is also characterized by high winter hardiness and drought resistance.
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Reports on the topic "Dry matter production"

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VanderGheynst, Jean, Michael Raviv, Jim Stapleton, and Dror Minz. Effect of Combined Solarization and in Solum Compost Decomposition on Soil Health. United States Department of Agriculture, October 2013. http://dx.doi.org/10.32747/2013.7594388.bard.

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In soil solarization, moist soil is covered with a transparent plastic film, resulting in passive solar heating which inactivates soil-borne pathogen/weed propagules. Although solarization is an effective alternative to soil fumigation and chemical pesticide application, it is not widely used due to its long duration, which coincides with the growing season of some crops, thereby causing a loss of income. The basis of this project was that solarization of amended soil would be utilized more widely if growers could adopt the practice without losing production. In this research we examined three factors expected to contribute to greater utilization of solarization: 1) investigation of techniques that increase soil temperature, thereby reducing the time required for solarization; 2) development and validation of predictive soil heating models to enable informed decisions regarding soil and solarization management that accommodate the crop production cycle, and 3) elucidation of the contributions of microbial activity and microbial community structure to soil heating during solarization. Laboratory studies and a field trial were performed to determine heat generation in soil amended with compost during solarization. Respiration was measured in amended soil samples prior to and following solarization as a function of soil depth. Additionally, phytotoxicity was estimated through measurement of germination and early growth of lettuce seedlings in greenhouse assays, and samples were subjected to 16S ribosomal RNA gene sequencing to characterize microbial communities. Amendment of soil with 10% (g/g) compost containing 16.9 mg CO2/g dry weight organic carbon resulted in soil temperatures that were 2oC to 4oC higher than soil alone. Approximately 85% of total organic carbon within the amended soil was exhausted during 22 days of solarization. There was no significant difference in residual respiration with soil depth down to 17.4 cm. Although freshly amended soil proved highly inhibitory to lettuce seed germination and seedling growth, phytotoxicity was not detected in solarized amended soil after 22 days of field solarization. The sequencing data obtained from field samples revealed similar microbial species richness and evenness in both solarized amended and non-amended soil. However, amendment led to enrichment of a community different from that of non-amended soil after solarization. Moreover, community structure varied by soil depth in solarized soil. Coupled with temperature data from soil during solarization, community data highlighted how thermal gradients in soil influence community structure and indicated microorganisms that may contribute to increased soil heating during solarization. Reliable predictive tools are necessary to characterize the solarization process and to minimize the opportunity cost incurred by farmers due to growing season abbreviation, however, current models do not accurately predict temperatures for soils with internal heat generation associated with the microbial breakdown of the soil amendment. To address the need for a more robust model, a first-order source term was developed to model the internal heat source during amended soil solarization. This source term was then incorporated into an existing “soil only” model and validated against data collected from amended soil field trials. The expanded model outperformed both the existing stable-soil model and a constant source term model, predicting daily peak temperatures to within 0.1°C during the critical first week of solarization. Overall the results suggest that amendment of soil with compost prior to solarization may be of value in agricultural soil disinfestations operations, however additional work is needed to determine the effects of soil type and organic matter source on efficacy. Furthermore, models can be developed to predict soil temperature during solarization, however, additional work is needed to couple heat transfer models with pathogen and weed inactivation models to better estimate solarization duration necessary for disinfestation.
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Mizrach, Amos, Sydney L. Spahr, Ephraim Maltz, Michael R. Murphy, Zeev Schmilovitch, Jan E. Novakofski, Uri M. Peiper, et al. Ultrasonic Body Condition Measurements for Computerized Dairy Management Systems. United States Department of Agriculture, 1993. http://dx.doi.org/10.32747/1993.7568109.bard.

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The body condition (BC) score is recognized in the dairy industry as an essential tool for managing the energy reserves of the dairy cow, which is essential for sustaining optimal and efficient production over several lactations. The current use of BC scoring depends on the accuracy of subjective visual estimates, and this limits its kusefulness as a management aid in the dairy industry. A measuring tool that would frequently provide objective data on the cow's body reserves would be a major contribution to efficient dairy herd management. Ultrasonic sensors have the potential to be developed into an efficient BC measuring device, and the experimental use of such sensors for subcutaneous fat thickness (SDFT) estimates, as an indication for BC in beef cattle, supports this assumption. The purposes of this project were: 1. To compare visual BC scoring and ultrasonic fat thickness with on-line automated body weight (BW) measurements as monitors of nutritional adequacy of dairy cows at various stages of lactation. 2. To determine the effects of variation in digestive fill in early and late lactation on the accuracy of body weight measurements in lactating cows. 3. To modify an existing ultrasonic system and develop a specialized, low-cost sensor for repeatable determination of body condition scores by users with minimal training and skill. 4. To develop a standard for the assignment of body condition scores based on ultrasonic measurements of subdermal fat thickness. The procedure to execute these objectives involved: 1. Frequent measurement of BW, milk yield (MY), BC (visually scored) and subdermal fat thickness ultrasonically measured of dairy cows, and data analysis on average and individual basis. 2. Testing and selection of an appropriate special-purpose sensor, finding an optimum body location for working an ultrasonic measurement, prcessing the signals obtained, and correlating the resulting measurements with performance responses in lactating cows. Linking the ultrasonic signals to BC scores, and developing a BC scoring data acquisition system are the first steps towards fulfilling the necessary requirements for incorporating this device into an existing dairy herd management system, in order to provide the industry with a powerful managment tool. From the results obtained we could conclude that: 1. BC does not correlate with BW changes during all stages of lactation, although in general terms it does. These results were confirmed by individual cow BW and BC data obtained during the course of lactation, that were supported by individual objective ultrasonic measurement of SDFT. 2. BW changes reflect energy metabolism reliably ony after peak milk yield; early in lactation, a decrease in BW expresses mobilization of body reserves only qualitatively, and not quantitatively. 3. Gastrointestinal content increases throughout the whole period during which dry matter intake (DMI) increases. The drastic increase very early in lactation prevents the use of BW changes as a basis for quantitative estimatio of energy meatabolism; at this stage of lactation, konly a BC score or any other direct measurements willl provide a quantitative estimate of energy metabolism. 4. Ultrasonic measurements of subdermal fat thickness can be used to quantify changes that correlate with the actual condition of the cow, as assessed by performance and the traditional way of scoring. 5. To find the best site on the cow's body at which to obtain responses to BC and its changes in the course of lactation, additional sites have to be examined. From the present study, it seems that the sites between ribs 12 and 13 have the potential for this purpose. 6. The use of templates made it easier to repeat measurements at a desired site and spot. However, the convenient easy-to-handle way to standardize the measurement, described in this study, koffers scope for improvement. 7. The RF peak values of the A-mode are better indicators of the location of fat layer borders than image analysis, from the point of view of future commercial development. 8. The distances between the RF peaks of the A-mode can be automatically measured by suitable software, for future commercial development. 9. Proper analysis of daily body weight and milk yield data can provide the necessary information on body condition changes during lactation, until a direct BC measurement device is developed. 10. In any case, at least one visual BC assessment has to be done, preferably immediately after calving, for calibration purposes.
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Boisclair, Yves R., and Arieh Gertler. Development and Use of Leptin Receptor Antagonists to Increase Appetite and Adaptive Metabolism in Ruminants. United States Department of Agriculture, January 2012. http://dx.doi.org/10.32747/2012.7697120.bard.

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Objectives The original project had 2 major objectives: (1) To determine the effects of centrally administered leptin antagonist on appetite and adaptive metabolism in the sheep; (2) To develop and prepare second-generation leptin antagonists combining high binding affinity and prolonged in vivo half-life. Background Periods of suboptimal nutrition or exaggerated metabolic activity demands lead to a state of chronic energy insufficiency. Ruminants remain productive for a surprisingly long period of time under these circumstances by evoking adaptations sparing available energy and nutrients. The mechanism driving these adaptations in ruminant remains unknown, but could involve a reduction in plasma leptin, a hormone acting predominantly in the brain. In laboratory animals, reduced leptin signaling promotes survival during nutritional insufficiency by triggering energy sparing adaptations such as reduced thyroid hormone production and insulin resistance. Our overall hypothesis is that similar adaptations are triggered by reduced leptin signaling in the brain of ruminants. Testing of this hypothesis in ruminants has not been possible due to inability to block the actions of endogenous leptin and access to ruminant models where leptin antagonistic therapy is feasible and effective. Major achievements and conclusions The Israeli team had previously mutated 3 residues in ovine leptin, with no effect on receptor binding. This mutant was renamed ovine leptin antagonist (OLA) because it cannot activate signaling and therefore antagonizes the ability of wild type leptin to activate its receptor. To transform OLA into an effective in vivo antagonist, the Israeli made 2 important technical advances. First, it incorporated an additional mutation into OLA, increasing its binding affinity and thus transforming it into a super ovine leptin antagonist (SOLA). Second, the Israeli team developed a method whereby polyethylene glycol is covalently attached to SOLA (PEG-SOLA) with the goal of extending its half-life in vivo. The US team used OLA and PEG-SOLA in 2 separate animal models. First, OLA was chronically administered directly into the brain of mature sheep via a cannula implanted into the 3rdcerebroventricule. Unexpectedly, OLA had no effect of voluntary feed intake or various indicators of peripheral insulin action but reduced the plasma concentration of thyroid hormones. Second, the US team tested the effect of peripheral PEG-SOLA administration in an energy sensitive, rapidly growing lamb model. PEG-SOLA was administered for 14 consecutive days after birth or for 5 consecutive days before sacrifice on day 40 of life. Plasma PEG-SOLA had a half-life of over 16 h and circulated in 225- to 288-fold excess over endogenous leptin. PEG-SOLA administration reduced plasma thyroid hormones and resulted in a higher fat content in the carcass at slaughter, but had no effects on feed intake, body weight, plasma glucose or insulin. These results show that the team succeeded in developing a leptin antagonist with a long in vivo half-life. Moreover, in vivo results show that reduced leptin signaling promotes energy sparing in ruminants by repressing thyroid hormone production. Scientific and agricultural implications The physiological role of leptin in ruminants has been difficult to resolve because peripheral administration of wild type leptin causes little effects. Our work with leptin antagonists show for the first time in ruminants that reduced leptin signaling induces energy sparing mechanisms involving thyroid hormone production with little effect on peripheral insulin action. Additional work is needed to develop even more potent leptin antagonists, to establish optimal administration protocols and to narrow down phases of the ruminant life cycle when their use will improve productivity.
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Meidan, Rina, and Joy Pate. Roles of Endothelin 1 and Tumor Necrosis Factor-A in Determining Responsiveness of the Bovine Corpus Luteum to Prostaglandin F2a. United States Department of Agriculture, January 2004. http://dx.doi.org/10.32747/2004.7695854.bard.

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The corpus luteum (CL) is a transient endocrine gland that has a vital role in the regulation of the estrous cycle, fertility and the maintenance of pregnancy. In the absence of appropriate support, such as occurs during maternal recognition of pregnancy, the CL will regress. Prostaglandin F2a (PGF) was first suggested as the physiological luteolysin in ruminants several decades ago. Yet, the cellular mechanisms by which PGF causes luteal regression remain poorly defined. In recent years it became evident that the process of luteal regression requires a close cooperation between steroidogenic, endothelial and immune cells, all resident cells of this gland. Changes in the population of these cells within the CL closely consort with the functional changes occurring during various stages of CL life span. The proposal aimed to gain a better understanding of the intra-ovarian regulation of luteolysis and focuses especially on the possible reasons causing the early CL (before day 5) to be refractory to the luteolytic actions of PGF. The specific aims of this proposal were to: determine if the refractoriness of the early CL to PGF is due to its inability to synthesize or respond to endothelin–1 (ET-1), determine the cellular localization of ET, PGF and tumor necrosis factor a (TNF a) receptors in early and mid luteal phases, determine the functional relationships among ET-1 and cytokines, and characterize the effects of PGF and ET-1 on prostaglandin production by luteal cell types. We found that in contrast to the mature CL, administration of PGF2a before day 5 of the bovine cycle failed to elevate ET-1, ETA receptors or to induce luteolysis. In fact, PGF₂ₐ prevented the upregulation of the ET-1 gene by ET-1 or TNFa in cultured luteal cells from day 4 CL. In addition, we reported that ECE-1 expression was elevated during the transitionof the CL from early to mid luteal phase and was accompanied by a significant rise in ET-1 peptide. This coincides with the time point at which the CL gains its responsiveness to PGF2a, suggesting that ability to synthesize ET-1 may be a prerequisite for luteolysis. We have shown that while ET-1 mRNA was exclusively localized to endothelial cells both in young and mature CL, ECE-1 was present in the endothelial cells and steroidogenic cells alike. We also found that the gene for TNF receptor I is only moderately affected by the cytokines tested, but that the gene for TNF receptor II is upregulated by ET-1 and PGF₂ₐ. However, these cytokines both increase expression of MCP-1, although TNFa is even more effective in this regard. In addition, we found that proteins involved in the transport and metabolism of PGF (PGT, PGDH, COX-2) change as the estrous cycle progresses, and could contribute to the refractoriness of young CL. The data obtained in this work illustrate ET-1 synthesis throughout the bovine cycle and provide a better understanding of the mechanisms regulating luteal regression and unravel reasons causing the CL to be refractory to PGF2a.
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Hefetz, Abraham, and Justin O. Schmidt. Use of Bee-Borne Attractants for Pollination of Nonrewarding Flowers: Model System of Male-Sterile Tomato Flowers. United States Department of Agriculture, October 2003. http://dx.doi.org/10.32747/2003.7586462.bard.

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The use of bee natural product for enhancing pollination is especially valuable in problematic crops that are generally avoided by bees. In the present research we attempted to enhance bee visitation to Male Sterile (M-S) tomato flowers generally used in the production of hybrid seeds. These flowers that lack both pollen and nectar are unattractive to bees that learn rapidly to avoid them. The specific objects were to elucidate the chemical composition of the exocrine products of two bumble bee species the North American Bombus impatiens and the Israeli B. terrestris. Of these, to isolate and identify a bee attractant which when sprayed on M-S tomato flowers will enhance bee visitation, and to provide a procedure of the pheromone application regime. During the research we realized that our knowledge of B. impatiens is too little and we narrowed the objective to learning the basic social behavior of the bees and the pattern of foraging in a flight chamber and how it is affected by biogenic amines. Colonies of B. impatiens are characterized by a high number of workers and a relatively small number of queens. Size differences between queens and workers are pronounced and the queen seems to have full control over egg laying. Only about 9% of the workers in mature colonies had mature oocytes, and there were no signs of a "competition phase" as we know in B. terrestris. Queens and workers differ in their exocrine bouquet. Queen's Dufour's gland possesses a series of linear, saturated and unsaturated hydrocarbons whereas that of workers contains in addition a series of wax-type esters. Bees were trained to either visit or avoid artificially scented electronic flowers in a flight chamber. Since bee also learned to avoid scented non-rewarding flowers we attempted to interfere with this learning. We tested the effect of octopamine, a biogenic amine affecting bee behavior, on the choice behavior of free-flying bumblebees. Our results show that octopamine had no significant effect on the bees' equilibrium choice or on the overall rate of the behavioral change in response to the change in reward. Rather, octopamine significantly affected the time interval between the change in reward status and the initiation of behavioral change in the bee. In B. terrestris we studied the foraging pattern of the bees on tomato flowers in a semi commercial greenhouse in Yad Mordechai. Bee learned very quickly to avoid the non- rewarding M-S flowers, irrespective of their arrangement in the plot, i.e., their mixing with normal, pollen bearing flowers. However, bees seem to "forget" this information during the night since the foraging pattern repeats itself the next morning. Several exocrine products were tested as visitation enhancers. Among these, tarsal gland extracts are the most attractive. The compounds identified in the tarsal gland extract are mostly linear saturated hydrocarbons with small amounts of unsaturated ones. Application was performed every second day on leaves in selected inflorescences. Bee visitation increased significantly in the treated inflorescences as compared to the control, solvent treated. Treatment of the anthers cone was more effective than on the flower petals or the surrounding leaves. Methanol proved to be a non-flower-destructive solvent. We have shown that bumble bees (B. terrestris) can be manipulated by bee-borne attractants to visit non-rewarding flowers. We have further demonstrated that the bees learning ability can be manipulated by applying exogenously octopamine. Both methods can be additively applied in enhancing pollination of desired crops. Such manipulation will be especially useful in tomato cultivation for hybrid seed production.
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Phillips, Donald A., Yitzhak Spiegel, and Howard Ferris. Optimizing nematode management by defining natural chemical bases of behavior. United States Department of Agriculture, November 2006. http://dx.doi.org/10.32747/2006.7587234.bard.

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This project was based on the hypothesis that nematodes interacting with plants as either parasites or beneficial saprophytes are attracted to their host by natural products. This concept was supported by numerous observations that parasitic nematodes are attracted to root exudates. Our overall goal was to identify nematode sensory compounds from root exudates and to use that information for reducing nematicide applications. We applied skills of the investigators to achieve three specific objectives: 1) Identify nematode behavioral cues (e.g., attractants or repellents) in root exudates; 2) Identify new natural nematicidal compounds; and 3) Combine a natural attractant and a nematicide into a nematode trap. Because saprophytic nematodes benefit plants by mineralizing organic matter, we sought compounds attractive primarily to parasitic nematodes. The project was constructed on several complementary foundations. First, data from Dr. Spiegel’s lab showed that under aseptic conditions Ditylenchus dipsaci, a parasite on onion, is attracted to certain fractions of onion root exudates. Second, PI Phillips had a sizeable collection of natural plant products he had identified from previous work on Rhizobium-legume interactions, which could be tested “off the shelf”. Third, Dr. Ferris had access to aseptic and natural populations of various saprophytic and parasitic nematodes. The project focused on five nematode species: D.dipsaci, Heterodera avenae, and Tylenchulussemipenetransat ARO, and Meloidogyne javanicand Caenorhabditis elegans at UCD. Ten pure plant compounds, mostly flavonoids, were tested on the various nematode species using six different assay systems. Results obtained with assorted test systems and by various scientists in the same test systems were essentially irreproducible. Many convincing, Many convincing, i.e. statistically significant, results in one system or with one investigator could not be repeated with other assays or different people. A recent report from others found that these compounds, plus another 30, were inactive as attractants in three additional parasitic nematode species (Wuyts et al. Nematology 8:89- 101, 2006). Assays designed to test the hypothesis that several compounds together are required to attract nematodes have thus far failed to find a reproducibly active combination. In contrast to results using pure plant compounds, complex unfractionated exudates from aseptic onion root reproducibly attracted D. dipsaci in both the ARO and UCD labs. Onion root exudate collection, separation into HPLC fractions, assays using D. dipsaci and MS-MS experiments proceeded collaboratively between ARO and UCD without any definitive identification of an active compound. The final active fraction contained two major molecules and traces of several other compounds. In the end, analytical studies were limited by the amount of onion root exudate and the complexity of the purification process. These tests showed that aseptic plant roots release attractant molecules, but whether nematodes influence that release, as insects trigger release of attractants from plants, is unknown. Related experiments showed that the saprophyte C. elegans stimulates its prey, Pseudomonas bacteria, to increase production of 2, 4-diacetylphloroglucinol (DAPG) a compound that promotes amino acid exudation by plant roots. It is thus possible that saprophytic nematodes are attracted primarily to their bacterial or fungal prey and secondarily to effects of those microorganisms on root exudation. These observations offer promising avenues for understanding root-zone interactions, but no direct routes to controlling nematodes in agriculture were evident. Extracts from two plant sources, Chrysanthemum coronarium and Sequoia sempervirens, showed nematicidal activity at ARO and UCD, respectively. Attempts to purify an active compound from S. sempervirens failed, but preliminary results from C. coronarium are judged to form a potential basis for further work at ARO. These results highlight the problems of studying complex movement patterns in sentient organisms like nematodes and the issues associated with natural product isolation from complex mixtures. Those two difficulties combined with complications now associated with obtaining US visas, slowed and ultimately limited progress on this project. As a result, US investigators expended only 65% of the $207,400 originally planned for this project. The Israeli side of the project advanced more directly toward its scientific goals and lists its expenditures in the customary financial report.
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7

Yaron, Zvi, Martin P. Schreibman, Abigail Elizur, and Yonathan Zohar. Advancing Puberty in the Black Carp (Mylopharyngodon Piceus) and the Striped Bass (Morone Saxatilis). United States Department of Agriculture, August 1993. http://dx.doi.org/10.32747/1993.7568102.bard.

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The black carp (bc)GtH IIb cDNA was amplified and isolated, cloned and sequenced. Comparison of the bcGtH IIb deduced a.a. sequence with that of GtH IIb from other teleosts revealed high homology to cyprinid species and a lower homology to salmonid or perciform fish. The gene coding for the GtH IIb was isolated and sequenced. Three bc recombinant phages which hybridized to the goldfish GtH Ib cDNA probe were isolated and are currently being characterized. The region coding for the mature GtH IIb was expressed in a bacterial expression vector resulting in the production of a recombinant protein. In vitro folding resulted in a protein only 1.3% of which displaced the native common carp GtH II in a RIA. Therefore, the common carp GtH RIA was utilized for the physiological studies at the current phase of the project. Two non-functional sites were identified along the brain-pituitary gonadal axis in the immature black carp. The pituitary is refractory to GnRH stimulation due to a block proximal to the activation of PKA and PKC probably at the level of GnRH receptors. The gonads, although capable of producing steroids, are refractory to gonadotropic stimulation but do respond to cAMP antagonists, indicating a block at the GtH receptor level. Attempts to advance puberty in 2 and 3 y old black carp showed that testosterone (T) stimulates GtH synthesis in the pituitary and increases its sensitivity to GnRh. A 2 month treatment combining T+GnRH increased the circulating GFtH level in 3 y old fish. Addition of domperidone to such a treatment facilitated both the accumulation of GtH in the pituitary and its response to GnRH. The cDNA of striped bass GtH a, Ib and IIb subunits were amplified, isolated, cloned and sequenced, and their deduced a.a. sequences were compared with those of other teleosts. A ribonuclease protection assay was developed for a sensitive and simultaneous determination of all GtH subunits, and of b-actin mRNAs of the striped bass. GnRH stimulated dramatically the expression of the a and GtH IIb subunits but the level of GtH Ib mRNA increased only moderately. These findings suggest that GtH-II, considered in salmonids to be involved only in final stages of gametogenesis, can be induced by GnRH to a higher extent than GtH-I in juvenile striped bass. The native GtH II of the striped bass was isolated and purified, and an ELISA for its determination was developed. The production of all recombinant striped bass GtH subunits is in progress using the insect cell (Sf9) culture and the BAC-TO-BAC baculovirus expression system. A recombinant GtH IIb subunit has been produced already, and its similarity to the native subunit was confirmed. The yield of the recombinant glycoprotein can reach 3.5 mg/ml after 3 days culture. All male striped bass reach puberty after 3 y. However, precocious puberty was discovered in 1 and 2 y old males. Females become vitellogenic during their 4th year. In immature 2 y old females, T treatment elevates the pituitary GtH II content while GnRH only potentiates the effect. However, in males GnRH and not T affects GtH accumulation in the pituitary. Neither GnRH, nor T treatment resulted in gonadal growth in 2 y old striped bass, indicating that either the accumulated GtH II was not released, or if released, the gonads were refractory to GtH stimulation, similar to the situation in the immature black carp. In 3 y old female striped bass, 150 day GnRHa treatment resulted in an increase in GSI, while T treatment, with or without GnRHa, resulted in a decrease in oocyte diameter, similar to the effect seen in the black carp. Further attempts to advance puberty in both fish species should take into account the positive effect of T on pituitary GtH and its negative effect of ovarian growth.
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8

Bennett, Alan B., Arthur Schaffer, and David Granot. Genetic and Biochemical Characterization of Fructose Accumulation: A Strategy to Improve Fruit Quality. United States Department of Agriculture, June 2000. http://dx.doi.org/10.32747/2000.7571353.bard.

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The goal of the research project was to evaluate the potential to genetically modify or engineer carbohydrate metabolism in tomato fruit to enhance levels of fructose, a sugar with nearly twice the sweetness value of other sugars. The specific research objectives to achieve that goal were to: 1. Establish the inheritance of a fructose-accumulating trait identified in F1 hybrids of an inferspecific cross between L. hirsutum XL. esculentum and identify linked molecular markers to facilitate its introgression into tomato cultivars. This objective was completed with the genetic data indicating a single major gene, termed Fgr (Fructose glucose ratio), that controlled the partitioning of hexose in the mature fruit. Molecular markers for the gene, were developed to aid introgression of this gene into cultivated tomato. In addition, a second major gene encoding fructokinase 2 (FK2) was found to be a determinant of the fructose to glucose ratio in fruit. The relationship between FK2 and Fgr is epistatic with a combined synergistic effect of the two hirsutum-derived genes on fructose/glucose ratios. 2. Characterize the metabolic and transport properties responsible for high fructose/glucose ratios in fructose-accumulating genotypes. The effect of both the Fgr and FK2 genes on the developmental accumulation of hexoses was studied in a wide range of genetic backgrounds. In all backgrounds the trait is a developmental one and that the increase in fructose to glucose ratio occurs at the breaker stage of fruit development. The following enzymes were assayed, none of which showed differences between genotypes, at either the breaker or ripe stage: invertase, sucrose synthase, FK1, FK2, hexokinase, PGI and PGM. The lack of effect of the FK2 gene on fructokinase activity is surprising and at present we have no explanation for the phenomenon. However, the hirsutum derived Fgr allele was associated with significantly lower levels of phosphorylated glucose, G1c-1-P and G1c-6-P and concomitantly higher levels of the phosphorylated fructose, Fru-6-P, in both the breaker and ripe stage. This suggests a significant role for the isomerase reaction. 3. Develop and implement molecular genetic strategies for the production of transgenic plants with altered levels of enzymes that potentially control fructose/glucose ratios in fruit. This objective focused on manipulating hexokinase and fructokinase expression in transgenic plants. Two highly divergent cDNA clones (Frk1 and Frk2), encoding fructokinase (EC 2.7.1.4), were isolated from tomato (Lycopersicon esculentum) and a potato fructokinase cDNA clone was obtained from Dr. Howard Davies. Following expression in yeast, each fructokinase was identified to code for one of the tomato or potato fructokinase isoforms Transgenic tomato plants were generated with the fructokinase cDNA clone in both sense and antisense orientations and the effect of the gene on tomato plants is currently being studied.
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9

Lacerda Silva, P., G. R. Chalmers, A. M. M. Bustin, and R. M. Bustin. Gas geochemistry and the origins of H2S in the Montney Formation. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329794.

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The geology of the Montney Formation and the geochemistry of its produced fluids, including nonhydrocarbon gases such as hydrogen sulfide were investigated for both Alberta and BC play areas. Key parameters for understanding a complex petroleum system like the Montney play include changes in thickness, depth of burial, mass balance calculations, timing and magnitudes of paleotemperature exposure, as well as kerogen concentration and types to determine the distribution of hydrocarbon composition, H2S concentrations and CO2 concentrations. Results show that there is first-, second- and third- order variations in the maturation patterns that impact the hydrocarbon composition. Isomer ratio calculations for butane and propane, in combination with excess methane estimation from produced fluids, are powerful tools to highlight effects of migration in the hydrocarbon distribution. The present-day distribution of hydrocarbons is a result of fluid mixing between hydrocarbons generated in-situ with shorter-chained hydrocarbons (i.e., methane) migrated from deeper, more mature areas proximal to the deformation front, along structural elements like the Fort St. John Graben, as well as through areas of lithology with higher permeability. The BC Montney play appears to have hydrocarbon composition that reflects a larger contribution from in-situ generation, while the Montney play in Alberta has a higher proportion of its hydrocarbon volumes from migrated hydrocarbons. Hydrogen sulphide is observed to be laterally discontinuous and found in discrete zones or pockets. The locations of higher concentrations of hydrogen sulphide do not align with the sulphate-rich facies of the Charlie Lake Formation but can be seen to underlie areas of higher sulphate ion concentrations in the formation water. There is some alignment between CO2 and H2S, particularly south of Dawson Creek; however, the cross-plot of CO2 and H2S illustrates some deviation away from any correlation and there must be other processes at play (i.e., decomposition of kerogen or carbonate dissolution). The sources of sulphur in the produced H2S were investigated through isotopic analyses coupled with scanning electron microscopy, energy dispersive spectroscopy, and mineralogy by X-ray diffraction. The Montney Formation in BC can contain small discrete amounts of sulphur in the form of anhydrite as shown by XRD and SEM-EDX results. Sulphur isotopic analyses indicate that the most likely source of sulphur is from Triassic rocks, in particular, the Charlie Lake Formation, due to its close proximity, its high concentration of anhydrite (18-42%), and the evidence that dissolved sulphate ions migrated within the groundwater in fractures and transported anhydrite into the Halfway Formation and into the Montney Formation. The isotopic signature shows the sulphur isotopic ratio of the anhydrite in the Montney Formation is in the same range as the sulphur within the H2S gas and is a lighter ratio than what is found in Devonian anhydrite and H2S gas. This integrated study contributes to a better understanding of the hydrocarbon system for enhancing the efficiency of and optimizing the planning of drilling and production operations. Operators in BC should include mapping of the Charlie Lake evaporites and structural elements, three-dimensional seismic and sulphate ion concentrations in the connate water, when planning wells, in order to reduce the risk of encountering unexpected souring.
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