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Статті в журналах з теми "Soils – Tropics – Composition"
van der Velden, Nic, J. W. Ferry Slik, Yue-Hua Hu, Guoyu Lan, Luxian Lin, XiaoBao Deng, and Lourens Poorter. "Monodominance of Parashorea chinensis on fertile soils in a Chinese tropical rain forest." Journal of Tropical Ecology 30, no. 4 (June 23, 2014): 311–22. http://dx.doi.org/10.1017/s0266467414000212.
Повний текст джерелаOliveira, Luiz Antônio de. "CARACTERIZAÇÃO DOS LATOSSOLOS DA CHAPADA DE ARAGUARI: MINERAIS ARGILOSOS, GRANULOMETRIA E EVOLUÇÃO." Caminhos de Geografia 4, no. 8 (February 28, 2003): 20–37. http://dx.doi.org/10.14393/rcg4815302.
Повний текст джерелаSalawu, M. B., T. Acamovic, C. S. Stewart, F. D. DeB. Hovell, and R. L. Roothaert. "Chemical composition and in vitro degradability of different parts of Calliandra calothyrsus from Kenya." Proceedings of the British Society of Animal Science 1997 (1997): 72. http://dx.doi.org/10.1017/s1752756200595131.
Повний текст джерелаLyon, Steve W., Benjamin M. C. Fischer, Laura Morillas, Johanna Rojas Conejo, Ricardo Sánchez-Murillo, Andrea Suárez Serrano, Jay Frentress, Chih-Hsin Cheng, Monica Garcia, and Mark S. Johnson. "On the Potential of Biochar Soil Amendments as a Sustainable Water Management Strategy." Sustainability 14, no. 12 (June 8, 2022): 7026. http://dx.doi.org/10.3390/su14127026.
Повний текст джерелаPiperno, Dolores R., and Peter Becker. "Vegetational History of a Site in the Central Amazon Basin Derived from Phytolith and Charcoal Records from Natural Soils." Quaternary Research 45, no. 2 (March 1996): 202–9. http://dx.doi.org/10.1006/qres.1996.0020.
Повний текст джерелаForan, BD, G. Bastin, and B. Hill. "The pasture dynamics and management of two rangeland communities in the Victoria River District of the Northern Territory." Rangeland Journal 7, no. 2 (1985): 107. http://dx.doi.org/10.1071/rj9850107.
Повний текст джерелаNadel, R. L., M. C. Scholes, and M. J. Byrne. "Slash burning, faunal composition, and nutrient dynamics in a Eucalyptus grandis plantation in South AfricaThis article is one of a selection of papers published in the Special Forum on Towards Sustainable Forestry — The Living Soil: Soil Biodiversity and Ecosystem Function." Canadian Journal of Forest Research 37, no. 2 (February 2007): 226–35. http://dx.doi.org/10.1139/x06-287.
Повний текст джерелаAlbuquerque, A. G. B. M., T. O. Ferreira, G. N. Nóbrega, R. E. Romero, V. S. Souza Júnior, A. J. A. Meireles, and X. L. Otero. "Soil genesis on hypersaline tidal flats (apicum ecosystem) in a tropical semi-arid estuary (Ceará, Brazil)." Soil Research 52, no. 2 (2014): 140. http://dx.doi.org/10.1071/sr13179.
Повний текст джерелаPereira-De-Oliveira, Luiz, Lucio Macedo, José Neto, Dellane Santos, and Hugo Silva. "Viability of lateritic soil as alkaline activated precursor." MATEC Web of Conferences 274 (2019): 01004. http://dx.doi.org/10.1051/matecconf/201927401004.
Повний текст джерелаWilliams, J. E., M. P. Scheele, P. F. J. van Velthoven, J. P. Cammas, V. Thouret, C. Galy-Lacaux, and A. Volz-Thomas. "The influence of biogenic emissions from Africa on tropical tropospheric ozone during 2006: a global modeling study." Atmospheric Chemistry and Physics Discussions 9, no. 2 (April 28, 2009): 10367–427. http://dx.doi.org/10.5194/acpd-9-10367-2009.
Повний текст джерелаДисертації з теми "Soils – Tropics – Composition"
Kedi, Atolé Brice. "Fonctionnement des phosphatases dans les sols tropicaux : influence de la composition organo-minérale sur l'expression de l'activité enzymatique." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0049/document.
Повний текст джерелаThe role of catalytic activity of fungal phosphatases in the improvement of the phosphorus nutrition cannot be reliably predicted without taking into account the factors which influence their behaviour in the soil. The objective of this thesis was to study various factors which could influence the effectiveness of ectomycorrhizal fungal phosphatases in soils. Adsorption and the activity in the adsorbed state of phosphatases produced by Suillus collinitus and Hebeloma cylindrosporum were studied in contact with several fractions of various tropical soils. The persistence of the activity of these enzymes immobilized on the soils was also studied. These phosphatases showed a diversity of affinity for soil colloids, due to their origin and their characteristics. Moreover, no relation was found between adsorption and the resulting catalytic activity; there was generally no loss of activity in an adsorbed state. One of the enzymes which underwent rapid degradation in solution was protected by the presence of ferrallitic soils but not by the vertisols. These fungic phosphatase samples were purified and partially characterized. The fractions of S. collinitus phosphatases retained on hydrophobic chromatography column showed enhanced activity in contact with mineral clays with respect to solution. The hypothesis of dimeerisation on the clay surfaces was advanced to explain the unexpected enhancement of catalytic activity in an adsorbed state of the purified fractions
Setiari, Marwanto. "Study on decomposition characteristics of peat soils under oil palm plantation in Riau and West Kalimantan, Indonesia." Kyoto University, 2018. http://hdl.handle.net/2433/233851.
Повний текст джерела0048
新制・課程博士
博士(農学)
甲第21312号
農博第2297号
新制||農||1065(附属図書館)
学位論文||H30||N5146(農学部図書室)
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 舟川 晋也, 教授 縄田 栄治, 教授 北山 兼弘
学位規則第4条第1項該当
Ngo, Thi Phuong. "Effets des amendements organiques exogènes sur la composition de la matière organique et le stockage du carbone d'un sol dégradé par l'érosion dans le Nord du Vietnam." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066152/document.
Повний текст джерелаIntensification of agricultural use of tropical soils in Northern Vietnam leads to acidification associated with organic matter loss, rapid decline of their fertility and high erosion rates. Such negative effects may be counteracted by exogenous organic amendments (EOMs). The application of buffalo manure, its compost and vermicompost and biochar alone or in mixture with other EOMs is promising to improve at low cost soil quality, plant growth and carbon sequestration. The aims of this study were to evaluate (1) the usefulness of the four EOM alone or in mixture to sequester carbon and (2) the effect of these amendments on quantity and quality of soil organic matter of a tropical soil degraded by erosion. To anwer to this objective we carried out incubations in the laboratory, in litterbags under field conditions and we monitored a mesocom experiment, where the EOM were added and subjected during three years to cultivation and natural rainfall conditions. Our results showed that composting in the presence of earthworms led to stronger transformation of buffalo manure than regular composting. Vermicompost was enriched in N-containing compounds and depleted in polysaccharides. It further contained stronger modified lignin compared to regular compost. Biological reactivity of these AOEs was related to their soluble organic matter content, which decreased in the order buffalo manure > compost > vermicompost, whereas their chemical reactivity was similar. Bamboo biochar was enriched in aromatic carbon and characterized by a high biological and chemical recalcitrance. The presence of biochar influenced the biological as well as chemical reactivity of the other organic amendments. It led to a protection of organic matter against chemical oxidation and changed their susceptibility to biological degradation. Our experience with mesocosmes during 3 year under the natural conditions showed that all organic amendments had a positive effect on soil carbon storage and significantly influences soil organic matter quality. Biochar could increase the soil carbon sequestration potential, when applied in mixture with vermicompost. The presence of biochar increased lignin derived compounds abundance as well as both plant and microbial sugar content of soil amended with vermicompost but it had no effect in the case of control soil. Compared to our litterbag experiment these results show that EOM have a strong contrasting effect on plant growth, in particular root litter input. In conclusion, the incorporation of biochar and vermicompost seems to be the best solution to improuve the quality of degraded soil in Northem Vietnam. More studies about the impacts of this amendment on soil physico-chemical and biological properties in long-term are needed to comfirm these results
Violette, Aurélie. "Processus et bilans d'altérations en milieu tropical (bassin versant de Mule Hole, Inde du sud) : sensibilité à la composition minéralogique et au climat." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1199/.
Повний текст джерелаThe objective of this thesis is to improve our understanding of the chemical weathering processes and of the control factors at a small experimental watershed scale in the Tropics (Mule Hole, South India). Relying on the numerical modelling method, it focuses particularly on the sensitivity to the mineralogy and climate. The first part of this work concerns the mineralogical and chemical descriptions of the soils (chromic luvisol, vertisol) and the bedrock (gneiss). The second part deals with the coupled modelling between a geochemical and a hydrological model. On the first hand, current processes at play in the catchment are investigated. The model is calibrated with both stream and groundwater measured chemical compositions. The results show that the chemical weathering fluxes are mainly supplied by the dissolution of authigenic smectites in soils (5 vol. %) and not by the dissolution of the primary minerals. On the second hand, sensitivity tests to the mineralogical composition and climate are performed
Solis, Michael Jay L. [Verfasser]. "Leaf-inhabiting fungal endophytes of F. benjamina, F. elastica, F. religiosa from Philippine tropical forests and German botanical greenhouses : assessment of diversity, community composition and bioprospecting perspective / Michael Jay L. Solis." Greifswald : Universitätsbibliothek Greifswald, 2016. http://d-nb.info/1098171217/34.
Повний текст джерелаMarian, Franca [Verfasser], Stefan [Akademischer Betreuer] [Gutachter] Scheu, and Mark [Gutachter] Maraun. "Altitude, litter quality and availability of root derived resources as determinants of decomposition processes and soil microarthropod community composition in tropical montane rainforests in Southern Ecuador / Franca Marian ; Gutachter: Stefan Scheu, Mark Maraun ; Betreuer: Stefan Scheu." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1117908585/34.
Повний текст джерелаDahlsjö, Cecilia A. L. "Termite assemblage structure and function : a study of the importance of termites in lowland equatorial forests." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:28a37283-4013-4c5a-be2e-aac26d97f838.
Повний текст джерелаAzevedo, Luiz Otavio Roffee. "Infra-Red Spectrophotometry and X-Ray Diffractometry as Tools in the Study of Nickel Laterites." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/231213.
Повний текст джерелаGrunberger, O. "Étude géochimique et isotopique de l'infiltration sous climat tropical contrasté : massif du Piton des neiges, île de la Réunion." Paris 11, 1989. http://elgebar.univ-reunion.fr/login?url=http://thesesenligne.univ.run/H/Orsay_Grunberger.pdf.
Повний текст джерелаReunion Island is located in the Indian ocean (21° 7 S, 52 °32 W) in the intertropical zone. Chemical and isotopic natural contents in rain waters, soil waters and groundwaters allow to study the water cycle upon the "Piton des Neighs" massif, which is an inactive strato-volcano. Chemical contents in rain show a marine influence pondered by effects of the relief. Isotopic abundances of 180 and 2H have similar distributions which are strongly disturbed during the tropical hurricanes. These natural variations determine an "input" function and can be found in soils and aquifers. The distribution of the abundances of 180 in soil water in the west part of the island allows to quantify the evaporation rate from the groundwater table at a steady state. At higher altitude infiltration occurs and has also been quantified. Groundwaters chemical analysis show that global salinity is related to the carbonate mineralization from biogenic C02. Cation contents can be related to the geochemistry of weathered lavas. Groundwater flow patterns do not necessary follow the general slope of the volcano. Chemical contents of ground water from costal aquifers not only show marine influence but also a carbonated and sulfated source of mineralization. Carbone and sulfate isotopic contents illustrate the influence of cane sugar cultivation. The mean transit times are probably less than 35 years. All developing managements to come should take into account that western costal aquifers are not protected from pollution
涂惠珠. "Effects of Different Fertilizers on Nitrification Activities and the Compositions of Nitrifying Bacterial Polulations of Tropical Soils." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/66969943901854233361.
Повний текст джерела東吳大學
微生物學研究所
82
Nitrification is the process of converting ammonium to nitrate by way of nitrite. This process will not only reduce the toxic effect of high concentration of ammonium against plant growth but also increase the fertilitiy of soils. However, this process can also cause soil acidification. Nitrate carrying negative charge is easily been repelled by the clay particles, so it can move rapidly through the soil profile. Therefore, it can move into groundwater by simple leaching process and cause great harm to our health if ingested, in order to estimate the nitrifying activity of soil samples, one can obtain the information by multiplying the numbers of the nitrifying bacteria to the measured nitrifying potential of that soil. In this study, the methed of most probable number (MPN) was used to estimate the numbers of ammonium-oxidizing bacteria and nitrite-oxidizing bacteria in soils receiving chemical or organic fertilizer. At the same time, we had also measured the effects of different fertilizers on the short-term nitrifying activities of Taiwan clay and sandstone shale and slate alluvial soil. The results indicate that in soils samples without the addition of ammonium sulfate, we had detected little or no accumulation of both nitrite and nitrate. On the other hand, when ammonium sulfate was added, we observed an increase in the concentration of nitrate while no nitrite accumulation was been detected. Generally speaking, in all the treatments the amount of nitrate been accumulated was the lowest in sandstone shale and slate alluvial soil amended with chemical fertilizer. The results also indicated that in both Taiwan clay and sandstone shale and slate alluvial soil, the rates of nitrification varies with seasons. However it is clear that the above rate is faster in soils receiving organic fertilizer. Besides soils' physical and chemical properties, the compositions of nitrifying bacterial population may also play an important role. When NaClO3 was used to inhibt the conversion of nitrite to nitrate, we observed that the inhibitory results varied with soils and with seasons. However, in soils receiving organic fertilizer usually has high NO2--N accumulation than soils receiving chemical fertilizers. Although the numbers of ammonium-oxidizing bacteria is generally higher than the numbers of nitrite-oxidizing bacteria, no direct relationship could be established between the numbers of nitrifying bacteria and soils' nitrifying activities. Nevertheless, from the results obtained from those experiments involving the usage of nitrification inhibitors, it is clear that the compositions of nitrifying bacterial population varied not only with soils but also with seasons. Antiserum against Nitrosomonas europaea was also prepared in this study which was to be used for the identification purpose in future experiment.
Частини книг з теми "Soils – Tropics – Composition"
Martinelli, L. A., M. C. Piccolo, A. R. Townsend, P. M. Vitousek, E. Cuevas, W. Mcdowell, G. P. Robertson, O. C. Santos, and K. Treseder. "Nitrogen stable isotopic composition of leaves and soil: Tropical versus temperate forests." In New Perspectives on Nitrogen Cycling in the Temperate and Tropical Americas, 45–65. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4645-6_3.
Повний текст джерелаSposito, Garrison. "The Composition of Soils." In The Chemistry of Soils. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780190630881.003.0005.
Повний текст джерелаJuo, Anthony S. R., and Kathrin Franzluebbers. "Soil Physics." In Tropical Soils. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195115987.003.0007.
Повний текст джерелаSeligson, Kenneth E. "Fields." In The Maya and Climate Change, 69—C4.P89. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/oso/9780197652923.003.0004.
Повний текст джерелаDias-Filho, Moacyr B., and Eric A. Davidson. "Linking Biogeochemical Cycles to Cattle Pasture Management and Sustainability in The Amazon Basin." In The Biogeochemistry of the Amazon Basin. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195114317.003.0009.
Повний текст джерелаM. Mejía-Ortíz, Luis, Peter Sprouse, Juan C. Tejeda-Mazariegos, Jair Valladarez, Oscar Frausto-Martínez, Alejandro L. Collantes-Chavez-Costa, Guillermo Ruíz-Cancino, and German Yáñez. "Tropical Subterranean Ecosystems in Mexico, Guatemala and Belize: A Review of Aquatic Biodiversity and Their Ecological Aspects." In Natural History and Ecology of Mexico and Central America. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97694.
Повний текст джерелаNadkarni, Nalini M., and Robert O. Lawton. "Ecosystem Ecology and Forest Dynamics." In Monteverde. Oxford University Press, 2000. http://dx.doi.org/10.1093/oso/9780195095609.003.0015.
Повний текст джерелаDenevan, William M. "Pre-European Human Impacts on Tropical Lowland Environments." In The Physical Geography of South America. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195313413.003.0025.
Повний текст джерелаMilchunas, Daniel G., and William K. Lauenroth. "Effects of Grazing on Abundance and Distribution of Shortgrass Steppe Consumers." In Ecology of the Shortgrass Steppe. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195135824.003.0022.
Повний текст джерелаSeyler, Patrick T., and Gerald R. Boaventura. "Trace Elements in the Mainstem Amazon River." In The Biogeochemistry of the Amazon Basin. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195114317.003.0019.
Повний текст джерелаТези доповідей конференцій з теми "Soils – Tropics – Composition"
Gordienko, T. A., R. A. Sukhodolskaya, D. N. Vavilov, and Yu A. Lukyanova. "SUSTAINABILITY OF PEDOBIONT MEADOW COMMUNITIES UNDER ANTHROPOGENIC LOAD." In V International Scientific Conference CONCEPTUAL AND APPLIED ASPECTS OF INVERTEBRATE SCIENTIFIC RESEARCH AND BIOLOGICAL EDUCATION. Tomsk State University Press, 2020. http://dx.doi.org/10.17223/978-5-94621-931-0-2020-12.
Повний текст джерелаDechang Han, Siwei Jiang, and Jing An. "Trophic-groups composition of nematode community in petroleum-contaminated soil of Liaohe Oilfield." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5966307.
Повний текст джерелаHesterberg, Dean, Talita Ferreira, Carla Pólo, Renata Rabelo, Hélio Tolentino, Carlos Pérez, Leandro Gonzaga, et al. "Micro- and Nano-Pore Structure and Composition of Microaggregates from a Tropical Soil." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12510.
Повний текст джерелаLi, Yutian, Changchun Wu, Xiaokai Xing, Mingliang Yue, and Yun Shang. "Testing and Analysis of the Soil Thermal Conductivity in Tropical Desert and Grassland of West Africa." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90291.
Повний текст джерела