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Articoli di riviste sul tema "Nutrients"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Roopa Jammula and Syeda Nishat Fathima. "Balancing act: Understanding nutrient interactions." World Journal of Biology Pharmacy and Health Sciences 18, no. 3 (2024): 243–47. http://dx.doi.org/10.30574/wjbphs.2024.18.3.0346.

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Nutrient interactions refer to the dynamic relationship between various nutrients, including minerals, vitamins, amino acids, and fatty acids, for proper functioning. An excess or deficiency of one nutrient can affect the requirements for many others, and increasing or decreasing a deficient nutrient may require an increase in other nutrients. Many nutrients require other nutrients to convert into other forms, and chemical combinations or reactions between nutrients can change their biological availability. Direct metabolic requirements of one nutrient can change the biological activity of ano

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Roopa, Jammula, and Nishat Fathima Syeda. "Balancing act: Understanding nutrient interactions." World Journal of Biology Pharmacy and Health Sciences 18, no. 3 (2024): 243–47. https://doi.org/10.5281/zenodo.13767054.

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Nutrient interactions refer to the dynamic relationship between various nutrients, including minerals, vitamins, amino acids, and fatty acids, for proper functioning. An excess or deficiency of one nutrient can affect the requirements for many others, and increasing or decreasing a deficient nutrient may require an increase in other nutrients. Many nutrients require other nutrients to convert into other forms, and chemical combinations or reactions between nutrients can change their biological availability. Direct metabolic requirements of one nutrient can change the biological activity of ano

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3

Mattson, Neil S., and Marc W. van Iersel. "Application of the “4R” Nutrient Stewardship Concept to Horticultural Crops: Applying Nutrients at the “Right Time”." HortTechnology 21, no. 6 (2011): 667–73. http://dx.doi.org/10.21273/horttech.21.6.667.

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The 4R nutrient stewardship framework presents four concepts to consider when applying fertilizers in a responsible matter; the “right source” of nutrients should be applied at the “right rate” during the “right time” and supplied to the “right place” to ensure their uptake. In this article, we provide ideas to consider when attempting to provide nutrients at the right time. When nutrients are applied at a time when they are not required by the plant, the result can be economic and environmental losses. Oversupply relative to plant demand can result in losses of applied nutrients because of le

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Meirinawati, Hanny, and A'an Johan Wahyudi. "Deepening Knowledge of Nutrient Dynamics in Coastal Waters." ASEAN Journal on Science and Technology for Development 39, no. 1 (2022): 23–33. http://dx.doi.org/10.29037/ajstd.747.

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Nutrients are important compounds in waterbodies that regulate primary productivity and phytoplankton growth, the basis of food webs. Increased nutrient concentration has become a serious concern because it causes eutrophication and threatens the sustainability of ecosystems. Eutrophication is the process of nutrient enrichment in water bodies that affects their productivity and decreases water quality. Although information about nutrient distribution, limiting nutrients, and nutrient budgets is important for coastal water management, studies of wide-scale nutrient dynamics in Indonesian water

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Bugbee, Bruce. "284 Towards Efficient Nutrient Management in Recirculating Hydroponic Culture." HortScience 34, no. 3 (1999): 491C—491. http://dx.doi.org/10.21273/hortsci.34.3.491c.

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There is an increasing need to recirculate and reuse nutrient solutions to reduce environmental and economic costs. However, one of the weakest points in hydroponics is the lack of information on managing the nutrient solution. Many growers and research scientists dump out nutrient solutions and refill at weekly intervals. Some authors have recommended measuring the concentrations of individual nutrients in solution as a key to nutrient control and maintenance. Dumping and replacing solution is unnecessary. Monitoring ions in solution is unnecessary; in fact the rapid depletion of some nutrien

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6

Bagale, Suman. "Nutrient Management for Soybean Crops." International Journal of Agronomy 2021 (September 6, 2021): 1–10. http://dx.doi.org/10.1155/2021/3304634.

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Soybean is one of the most important pulse crops in the world which supplies most of the protein and oil requirements. The efficient production of soybean crops is a constraint, with several biotic factors, abiotic factors, and crop management practices. Nutrient management is one of the important aspects for achieving higher production of crops. Effective nutrient management helps to assure the required nutrients needed for the plant without causing a significant decrease in the yield of crops. In addition to this, managing the nutrient efficiently helps the crop to cope with several types of

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Nyambaka, Hudson. "Impact of Processing on Nutrients and anti-Nutrients in Tubers and Leaves of Cassava (Manihot Esculenta Crantz)." Nutrition and Food Processing 7, no. 1 (2024): 01–08. http://dx.doi.org/10.31579/2637-8914/185.

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Purpose The study investigated the effect of boiling and deep-frying on the levels of selected nutrients and anti-nutrients in tubers and leaves of new Migyera and MM96/2480 varieties planted in Busia County. Although cassava contains high levels of nutrients (elements and vitamins) that meet nutrient requirements when consumed as the main diet, it requires thorough cooking to reduce high levels of phytochemicals, anti-nutrients affecting nutrient bio-accessibility, and carcinogenic compounds; procedures which also affect the nutrient levels. Methods Tubers and leaves from the tips of the plan

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De Souza, Juliana Sobreira, Deborah Guerra Barroso, Mirian Peixoto Soares da Silva, and Daniele De Alvarenga Ferreira. "PRODUTIVIDADE DE MINICEPAS DE CEDRO-AUSTRALIANO EM FUNÇÃO DO TEOR INICIAL DE NUTRIENTES." FLORESTA 45, no. 3 (2015): 617. http://dx.doi.org/10.5380/rf.v45i3.36529.

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O objetivo do presente estudo foi avaliar a produtividade de minicepas de cedro-australiano em função do teor inicial de nutrientes em dois sistemas de minijardim multiclonal, conduzidos em canaletão e tubetes. Foi determinada a produtividade de miniestacas em 186 minicepas em cada sistema de manejo e os teores de nutrientes nas brotações emitidas por 20 minicepas selecionadas ao acaso em cada sistema. Foram realizadas cinco coletas de brotações em intervalos médios de 32 dias no sistema canaletão, enquanto no sistema tubete foram realizadas três coletas de brotações em intervalos médios de 31

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Anderson, Wendy B., and William G. Eickmeier. "Nutrient resorption in Claytonia virginica L.: implications for deciduous forest nutrient cycling." Canadian Journal of Botany 78, no. 6 (2000): 832–39. http://dx.doi.org/10.1139/b00-056.

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According to the vernal dam hypothesis, spring ephemeral herbs temporarily sequester large nutrient pools in deciduous forests prior to canopy closure and return the nutrients to the soil following senescence of aboveground tissues. However, many species resorb nutrients from their leaves back to belowground tissues during senescence, and the degree of resorption is often associated with soil nutrient availability. Species that store large proportions of their absorbed nutrients between years are not participating in the temporary sequestering and rapid recycling of nutrients implied by the ve

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Oriolowo, O. B., O. J. John, D. S. Abubakar, T. M. Jonah, and D. Ismaila. "Anti-nutritional Composition of Honey Samples from Four Northern States of Nigeria." Nigerian Journal of Basic and Applied Sciences 27, no. 2 (2020): 32–38. http://dx.doi.org/10.4314/njbas.v27i2.5.

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Honey is sought globally for nutritional and therapeutic purposes because of the several chemical constituents that are abound in it. Some of these chemicals such as the anti-nutrients are defensive metabolic byproducts of plants from which bees obtained the nectars for honey production. This study was undertaken to determine the cyanide, oxalate, phytate, tannin and saponin compositions of honey samples from four North Central States of Nigeria. Anti-nutrients were analyzed following the Standards of Association of Official Analytical Chemists protocol for anti-nutrient compositions. Data obt

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Ridoutt, Bradley. "An Alternative Nutrient Rich Food Index (NRF-ai) Incorporating Prevalence of Inadequate and Excessive Nutrient Intake." Foods 10, no. 12 (2021): 3156. http://dx.doi.org/10.3390/foods10123156.

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Most nutrient profiling models give equal weight to nutrients irrespective of their ubiquity in the food system. There is also a degree of arbitrariness about which nutrients are included. In this study, an alternative Nutrient Rich Food index was developed (NRF-ai, where ai denotes adequate intake) incorporating prevalence of inadequate and excessive nutrient intake among Australian adults. Weighting factors for individual nutrients were based on a distance-to-target method using data from the Australian Health Survey describing the proportion of the population with usual intake less than the

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Turner, John, and Marcia J. Lambert. "Analysis of nutrient use efficiency (NUE) in Eucalyptus pilularis forests." Australian Journal of Botany 62, no. 7 (2014): 558. http://dx.doi.org/10.1071/bt14162.

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Alternative indices to use for nutrient use efficiency (NUE) were analysed for nitrogen, phosphorus, potassium, calcium, magnesium and sulfur, using 17 Eucalyptus pilularis forest sites to test the hypothesis that NUE increases with decreasing nutrient availability. Reported indices represent different measures of nutrient use, including (1) efficiency of acquisition from soil, (2) quantities required for organic matter production, (3) organic matter production related to uptake, (4) ability to internally retranslocate nutrients and (5) physiological requirement of nutrients. Some indices are

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Ardianti, Arini Ayu, Faris Nur Fauzi Athallah, Restu Wulansari, and Kurniawan Sigit Wicaksono. "The relationship Between Soil Chemical Properties and Uptake of Tea Plant Nutrient in PTPN VI Jambi." Jurnal Tanah dan Sumberdaya Lahan 9, no. 1 (2022): 181–91. http://dx.doi.org/10.21776/ub.jtsl.2022.009.1.20.

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Healthy soil could support plant growth by optimizing the availability of nutrients. The availability of nutrients influences the health of tea plants. Nutrient deficiencies would affect the plant physiology that exhibits the plant withering. This study aimed to define the relationship between soil nutrient availability with plant nutrient uptake. This research was conducted by managing secondary data soil chemical properties, and tea plant nutrients analyzed statistically with Pearson correlation. This study only found a significant correlation between soil pH with P and Mg uptake. Correlatio

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Kumar, Balwant, and G. K. Sharma. "Assessment of Soil Fertility through Response of Rice (Oryza sativa L.) to Nutrient Omission in Alfisols of Kondagaon District of Chhattisgarh in India." International Journal of Plant & Soil Science 35, no. 4 (2023): 58–67. http://dx.doi.org/10.9734/ijpss/2023/v35i42799.

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The investigation was carried out with the aim to identify the specific yield limiting nutrients through response of rice to nutrient omission in pot culture under completely randomized design with 3 replications and 11 treatments during kharif season 2017 and to demonstrate the optimum use of identified limiting nutrients in wheat crop at field level in Kondagaon district during rabi season 2017-18. The treatments were formulated by keeping one treatment with application of all nutrients in optimum level and others by sequentially omitting each nutrient. The soil had a clay loam texture, neut

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Yan, Jing, Nathaniel A. Bogie, and Teamrat A. Ghezzehei. "Root uptake under mismatched distributions of water and nutrients in the root zone." Biogeosciences 17, no. 24 (2020): 6377–92. http://dx.doi.org/10.5194/bg-17-6377-2020.

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Abstract. Most plants derive their water and nutrient needs from soils where the resources are often scarce, patchy, and ephemeral. It is not uncommon for plant roots to encounter mismatched patches of water-rich and nutrient-rich regions in natural environments. Such an uneven distribution of resources necessitates plant reliance on strategies for exploring and acquiring nutrients from relatively dry patches. We conducted a laboratory study that elucidates the biophysical mechanisms that enable this adaptation. The roots of tomato (Solanum lycopersicum) seedlings were laterally split and grow

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Nóra Bákonyi. "The effect of apoplastic pH on the nutrient uptake." Acta Agraria Debreceniensis, no. 50 (December 16, 2012): 65–71. http://dx.doi.org/10.34101/actaagrar/50/2568.

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The pH of soil and rhizosphare –around the roots- determine the mobility and solubility of nutrients. The exudates organic acids of plant able to modify the pH, as well as the microorganisms also take part in mobilization of nutrients. The nutrient solve mostly in mildly acidic and neutral pH. The either assumption of utilization of nutrients is the uptake by roots and of course uptake to the cells to take part in metabolism. The pH of apoplast fluid determines the solubility and uptake of nutrients to the cells.The aim of this study was to examine the effect of nutrient solution and apoplasti

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17

Banik, Abhisek, Aditi Pahari, Hirak Banerjee, and Sourav Patra. "Interaction Effects of Nutrient and Water on Crop Production System under Dry and Irrigated Agriculture System." Journal of Experimental Agriculture International 46, no. 9 (2024): 967–84. http://dx.doi.org/10.9734/jeai/2024/v46i92894.

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Many areas in India, including dryland areas, are under stress from two main obstacles to agricultural output, namely, inadequate soil nutrients and a scarcity of water. In most rainfed regions, except for a few places that can conduct irrigation, low precipitation levels and their erratic distribution usually result in soil water deficiency which leads to water as well as the instances of nutritional stress. Hence, in sustainable agricultural production systems, soil water and nutrient stress are major concerns. In crop production systems, the interplay between water and nutrients might yield

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S.P., Singh and Shilpa Kaushik. "Integrated nutrient management: An sustainable approach for soil productivity." Trends In Agriculture Science 2, no. 9 (2023): 735–49. https://doi.org/10.5281/zenodo.8338955.

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Integrated Nutrient Management approach to the management of plant nutrients for maintaining and enhancing soil, Soil fertility maintenance requires a balanced application of inorganic and organic nutrient sources. Sustainable agricultural productivity might be achieved through a wise use of integrated nutrient management. Integrated use of organic and inorganic source of plant nutrients on growth and yield attributes is very crucial for assurance of food security.  The integrated plant nutrient supply/management is important approach for maintenance or adjustment of soil fertility and pl

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19

Rose, Laura, Robert Buitenwerf, Michael Cramer, Edmund C. February, and Steven I. Higgins. "Effects of nutrient supply on carbon and water economies of C4 grasses." Functional Plant Biology 45, no. 9 (2018): 935. http://dx.doi.org/10.1071/fp17359.

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C3 plants can increase nutrient uptake by increasing transpiration, which promotes the flow of water with dissolved nutrients towards the roots. However, it is not clear if this mechanism of nutrient acquisition, termed ‘mass flow’, also operates in C4 plants. This is an important question, as differences in mass flow capacity may affect competitive interactions between C3 and C4 species. To test if mass flow can be induced in C4 species, we conducted an experiment in a semiarid seasonal savanna in South Africa. We grew six C4 grasses in nutrient-poor sand and supplied no nutrients, nutrients

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Liu, Ao, Aixi Han, and Li Chai. "Assessing the Nutrient Adequacy in China’s Food Supply from 1965 to 2018." Nutrients 13, no. 8 (2021): 2734. http://dx.doi.org/10.3390/nu13082734.

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Nutritional intake has important impacts on human health. A sufficient supply of nutrients is required to ensure high-level nutrition in a population. Assessment of nutrient supply adequacy can help to develop evidence-based policies and thereby promote public health. This study estimates the supply adequacy of nutrients in China’s food system from 1965 to 2018 at the national level, aiming to reveal whether the supply of nutrients meets the demand. The results show that the nutrient supply in China’s food system has experienced a sharp increase in the past five decades, and the deficiency in

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Havlin, John, and Ron Heiniger. "Soil Fertility Management for Better Crop Production." Agronomy 10, no. 9 (2020): 1349. http://dx.doi.org/10.3390/agronomy10091349.

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Increasing crop productivity per unit of land area to meet future food and fiber demand increases both soil nutrient removal and the importance of replenishing soil fertility through efficient nutrient management practices. Significant progress in enhancing nutrient-use efficiency in production agriculture requires improved estimates of plant-available nutrients in the root zone, enhanced crop response to applied nutrients, and reduced offsite nutrient transport. This special issue, Soil Fertility Management for Better Crop Production, presents 15 manuscripts that advance our knowledge of inte

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Johnson, Andrew S., Gianluca Polese, Max Johnson, and William Winlow. "Appropriate Human Serum Albumin Fluid Therapy and the Alleviation of COVID-19 Vulnerabilities: An Explanation of the HSA Lymphatic Nutrient Pump." COVID 2, no. 10 (2022): 1379–95. http://dx.doi.org/10.3390/covid2100099.

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COVID-19 and long COVID-19 vulnerabilities may be caused indirectly by albumin binding deficiency (ABD), which can be corrected by the correct administration of human serum albumin (HSA). The liver is the primary site of nutrient regulation and fluid volume maintenance; control of both is by changes to albumin concentration. In healthy subjects, the HSA lymphatic nutrient pump (HSALNP) ensures continual pumping of nutrients from the liver and that nutrients are appropriately distributed to organs. Nutrients are delivered to cells according to the availability of binding to HSA. The HSALNP, the

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Gustiar, Fitra, Munandar Munandar, M. Amar, et al. "Growth of Pakcoy (Brassica rapa L.) Hydroponic System Using Nutrients of Catfish Cultivation Waste." Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 11, no. 1 (2022): 86–93. http://dx.doi.org/10.36706/jlso.11.1.2022.560.

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Organic hydroponic cultivation systems require substitute nutrients other than inorganic fertilizers as a source of plant nutrients. Catfish cultivation waste is one of the potentials that can be used as hydroponic nutrients. This study aimed to find out the concentration of Liquid Organic Fertilizer (LOF) from fish cultivation waste as a substitute for commercial inorganic nutrients on the growth of pakcoy (Brassica rapa L.). This research was carried out in 2 stages, namely the manufacture of LOF from catfish culture waste and experiments using LOF as hydroponic nutrients. The results of thi

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Wogalter, Michael S., and Michael J. Kalsher. "Product Label List Format: Effects of Item Arrangement and Completeness on Comparison Time and Accuracy." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 38, no. 5 (1994): 389–93. http://dx.doi.org/10.1177/154193129403800508.

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This research examined the influence of two factors on the ease of gaining information from item lists: the order and completeness of the items displayed. Food nutrition labels served as the vehicle to test the manipulated lists on comparison time and accuracy performance measures. Four booklets, each containing 12 pairs of nutrient labels, were constructed in which the listed items were: (1) either arranged in a standard order or in a random order, and (2) either had a complete set of nutrients (including nutrients not present in the product) or a partial set of nutrients (excluding nutrients

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May, Geoffrey M., and Marvin P. Pritts. "Phosphorus, Zinc, and Boron Influence Yield Components in `Earliglow' Strawberry." Journal of the American Society for Horticultural Science 118, no. 1 (1993): 43–49. http://dx.doi.org/10.21273/jashs.118.1.43.

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The main effects and interactions of soil-applied P, B, and Zn on yield and its components were examined in the field at two pH levels with `Earliglow' strawberries (Fragaria × ananassa Duch.). Applied nutrients had significant effects on several yield components, but responses depended on the levels of other nutrients or the soil pH At a soil pH of 5.5, yield responded linearly to B and quadratically to P. At pH 6.5, P interacted with B and Zn. Fruit count per inflorescence was the yield component most strongly associated with yield followed by individual fruit weight. However, these two yiel

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Doaei, Saeid, Alireza Mosavi Jarrahi, Maryam Gholamalizadeh, and Milad Nazarzadeh. "Substitution Analysis in Nutrition Sciences: A Tutorial." Asian Pacific Journal of Cancer Biology 1, no. 3 (2016): 55–57. http://dx.doi.org/10.31557/apjcb.2016.1.3.55-57.

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Evaluating the effects of nutrients in our diet needs to enter more than one nutrient item (or food groups) in a single statistical unit. Accordingly, not only we consider the effects of a nutrient in health-related subjects, but also we find out the consequences of replacing and deleting nutrients. In nutritional epidemiology, substitutional analysis is used to evaluate the effects of various nutrients on a specific outcome. In the substitutional analysis, when some nutrients or foods are included in a single statistical model, investigation of the effects of several nutrients on the specific

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Zandonà, Eugenia, Priscila Oliveira-Cunha, and Beatriz Moreira-Ferreira. "PAPEL DOS PEIXES NA RECICLAGEM DE NUTRIENTES EM RIACHOS TROPICAIS." Oecologia Australis 25, no. 02 (2021): 449–63. http://dx.doi.org/10.4257/oeco.2021.2502.14.

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Fish can contribute directly and indirectly to nutrient recycling in aquatic environments, affecting community structure and ecosystem processes. Through the excretion of metabolic waste, fish make inorganic nutrients available in the environment that can be used by algae and bacteria. Nitrogen and phosphorus are often limiting nutrients in streams, so fish can be a relevant source of these nutrients. Many factors can influence excretion rates, including diet, body nutrient demand (for reproduction and growth), ontogeny, body size, temperature and other abiotic factors. Currently, two theories

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Scagel, Carolyn F., Guihong Bi, Leslie H. Fuchigami, and Richard P. Regan. "Nutrient Uptake and Loss by Container-grown Deciduous and Evergreen Rhododendron Nursery Plants." HortScience 46, no. 2 (2011): 296–305. http://dx.doi.org/10.21273/hortsci.46.2.296.

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The influence of nitrogen (N) fertilizer application on plant allocation, uptake, and demand for other essential nutrients was evaluated from May 2005 to Feb. 2006 in evergreen Rhododendron ‘P.J.M. Compact’ (PJM) and ‘English Roseum’ (ER) and deciduous Rhododendron ‘Gibraltar’ (AZ) grown in containers filled with soilless substrate. Net nutrient uptake and losses were calculated using piecewise regression and uptake efficiency, root absorption capacity, aboveground demand, nutrient use efficiency, and uptake ratios between N and other nutrients (N ratios) were calculated using net uptake betwe

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Aye, Hinotoli N., and Shalini Masih. "Role of Nutrients in Plants, Its Deficiency and Management." International Journal of Plant & Soil Science 35, no. 10 (2023): 129–36. http://dx.doi.org/10.9734/ijpss/2023/v35i102932.

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Plants like all living beings need energy source. The energy needed by the plants are uptaken in the form of 17 essential elements. Among which Carbon, hydrogen, and oxygen are derived from surrounding. The remaining 14 essential necessary elements are supplied either from rhizosphere and soil organic matter or by important organic or inorganic fertilizers or value added soil amendments. Plants start showing nutrient deficiency when they do not get the necessary nutrients. More nutrient use can also show poor growth because of toxic chemicals in soil. So, required amount of use and the placeme

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Li, Huandi, Jiang Li, Xiyun Jiao, et al. "The Fate and Challenges of the Main Nutrients in Returned Straw: A Basic Review." Agronomy 14, no. 4 (2024): 698. http://dx.doi.org/10.3390/agronomy14040698.

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Due to containing an abundance of essential nutrients, straw has significant potential to mitigate carbon (C), nitrogen (N), phosphorus (P), and potassium (K) deficits in soil. However, a lack of comprehensive and systematic reviews on C, N, P, and K release and conversion from straw and on the impact of available nutrients in soils supplemented using straw-returning (SR) practices is noticeable in the literature. Therefore, we investigated straw decomposition, its nutrient release characteristics, and the subsequent fate of nutrients in soils. At early stages, straw decomposes rapidly and the

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Adkison, Milo D. "Models of the effects of marine-derived nutrients on salmon (Oncorhynchus spp.) population dynamics." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 1 (2010): 5–15. http://dx.doi.org/10.1139/f09-161.

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Pacific salmon ( Oncorhynchus spp.) populations transfer large quantities of nutrients from their marine to their freshwater habitats. These nutrients have been shown to affect salmon populations in fresh water, including increasing basal food resources and elevating juvenile salmon growth rates and condition. The broader effects on recruitment and commercial harvests, however, are not clear. I developed and explored mathematical models of the effects of these nutrients on stock–recruitment relationships and used these models to investigate management implications. Populations strongly depende

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Zhang, Peng, Zhiyi Cui, Xiaojin Liu, and Daping Xu. "Above-Ground Biomass and Nutrient Accumulation in Ten Eucalyptus Clones in Leizhou Peninsula, Southern China." Forests 13, no. 4 (2022): 530. http://dx.doi.org/10.3390/f13040530.

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Selecting suitable clones and regulating nutrients for Eucalyptus plantation are a key management practice for improving productivity and nutrient use. Therefore, this study evaluated growth performance, above-ground biomass, nutrient content (nitrogen, phosphorus, potassium, calcium, and magnesium) and nutrient use efficiency (NUE) of ten Eucalyptus Clones for three sites in Leizhou Peninsula. The present study showed a significant genetic variation among clones in growth parameters. Organs have different characteristics in biomass and nutrient content. Stemwood had the highest biomass but lo

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Mitra, Aditee, and Kevin J. Flynn. "Promotion of harmful algal blooms by zooplankton predatory activity." Biology Letters 2, no. 2 (2006): 194–97. http://dx.doi.org/10.1098/rsbl.2006.0447.

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The relationship between algae and their zooplanktonic predators typically involves consumption of nutrients by algae, grazing of the algae by zooplankton which in turn enhances predator biomass, controls algal growth and regenerates nutrients. Eutrophication raises nutrient levels, but does not simply increase normal predator–prey activity; rather, harmful algal bloom (HAB) events develop often with serious ecological and aesthetic implications. Generally, HAB species are outwardly poor competitors for nutrients, while their development of grazing deterrents during nutrient stress ostensibly

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Walsh, Sheila M. "Ecosystem-Scale Effects of Nutrients and Fishing on Coral Reefs." Journal of Marine Biology 2011 (2011): 1–13. http://dx.doi.org/10.1155/2011/187248.

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Nutrient pollution and fishing are the primary local causes of coral reef decline but their ecosystem-scale effects are poorly understood. Results from small-scale manipulative experiments of herbivores and nutrients suggest prioritizing management of fishing over nutrient pollution because herbivores can control macroalgae and turf in the presence of nutrients. However, ecological theory suggests that the opposite occurs at large scales. Moreover, it is unclear whether fishing decreases herbivores because fishing of predators may result in an increase in herbivores. To investigate this parado

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Illukpitiy, Prabodh, and Jason P. DeKoff. "An Economic Assessment of Nutrient Removal from Switchgrass Production." Research in Applied Economics 11, no. 2 (2019): 26. http://dx.doi.org/10.5296/rae.v11i2.14998.

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Abstract (sommario):

The on-site loss of nutrients due to biomass removal creates additional costs for ethanol production however this aspect has not been properly incorporated in economic analyses of biomass production and processing. This study investigates costs of on-site nutrient losses in switchgrass fields in Tennessee. The replacement cost methodology was applied to measure on-site cost of nutrient losses due to biomass removal and was based on the costs of replacing nutrients removed from the production site. The estimated costs for total on-site nutrient loss due to biomass removal show a substantial los

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Tiani, Kendra A., Patrick J. Stover, and Martha S. Field. "The Role of Brain Barriers in Maintaining Brain Vitamin Levels." Annual Review of Nutrition 39, no. 1 (2019): 147–73. http://dx.doi.org/10.1146/annurev-nutr-082018-124235.

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Abstract (sommario):

It is increasingly recognized that tissue-specific nutrient deficiencies can exist in the absence of whole-body deficiency and that these deficiencies may result from disease or disease-related physiological processes. Brain and central nervous system tissues require adequate nutrient levels to function. Many nutrients are concentrated in the cerebrospinal fluid relative to the serum in healthy individuals, and other nutrients resist depletion in the presence of whole-body nutrient depletion. The endothelial, epithelial, and arachnoid brain barriers work in concert to selectively transport, co

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Elsdon, Travis S., and Karin E. Limburg. "Nutrients and their duration of enrichment influence periphyton cover and biomass in rural and urban streams." Marine and Freshwater Research 59, no. 6 (2008): 467. http://dx.doi.org/10.1071/mf07085.

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Abstract (sommario):

Although it is well known that land use affects nutrient dynamics and algal growth in streams, the responses to different durations of nutrient supply are poorly understood. The associations of benthic (periphyton-dominated) biomass with concentrations of dissolved nitrogen and phosphorus in rural and urban streams in New York were quantified. Biomass was significantly greater (2-fold) in the urban compared with the rural stream, which was associated with differences in dissolved nutrients. Experimental field enrichment of nutrient concentrations and duration of exposure altered benthic periph

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38

Pandey, Meena, Jiban Shrestha, Subash Subedi, and Kabita Kumari Shah. "ROLE OF NUTRIENTS IN WHEAT: A REVIEW." Tropical Agrobiodiversity 1, no. 1 (2020): 18–23. http://dx.doi.org/10.26480/trab.01.2020.18.23.

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Abstract (sommario):

Wheat (Triticum aestivum L.) is an important cereal crop that provides ample nutritious calories for humans and animals. The nutrient plays a vital role in the production of wheat. In this review, previous works were evaluated to investigate the role of nutrients, nutrient deficiency and toxicity in wheat. Both macro and micronutrients are necessary for wheat plants. Every nutrient has its own character and is involved in different metabolic processes of plant life. Nutrient deficiency and toxicity conditions inhibit normal plant growth and exhibit characteristic symptoms. For optimal growth,

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39

Salvador, Simone Martini, Aline Aparecida Ludvichak, Dione Richer Momolli, et al. "Removal of nutrients due to biomass harvest of Eucalyptus urograndis in different soils: macronutrients." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 16, no. 3 (2021): 1. http://dx.doi.org/10.4136/ambi-agua.2671.

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Abstract (sommario):

Intensive management of forest stands can increase biomass production, as well as increase the removal of nutrients from the site. This study therefore sought to simulate different harvest intensities and to calculate the nutrient-use efficiency of Eucalyptus urograndis in different types of soil. The study was carried out in a plantation of seven-year-old hybrid E. urograndis in the city of Telêmaco Borba, Paraná, Brazil. The study site included two sub areas with sandy soil and clayey soil (Cambisols Inceptisol and Ferralsols Oxisols, respectively). Using biomass and nutrients stock data, nu

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40

Bockheim, J. G., and J. E. Leide. "Foliar nutrient dynamics and nutrient-use efficiency of oak and pine on a low-fertility soil in Wisconsin." Canadian Journal of Forest Research 21, no. 6 (1991): 925–34. http://dx.doi.org/10.1139/x91-128.

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Abstract (sommario):

Seasonal changes in 10 nutrients were investigated in the foliage and current twigs of jack pine (Pinusbanksiana Lamb.) and northern pin oak (Quercusellipsoidalis E.J. Hill) growing on a sandy, nutrient-poor soil in northwestern Wisconsin. Midsummer (July 26) concentrations of all nutrients except Zn were significantly greater in oak foliage than in current needles of pine. Whereas the absolute amounts of N, P, K, Mg, S, B, and Fe in oak foliage peaked in midsummer, generally in late July, the amounts of Ca, Zn, and Mn continued to increase until leaf abscission. The absolute amounts of all 10

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Treter, Renan Jardel, Ivan Ricardo Carvalho, Danieli Jacoboski Hutra, et al. "Symptoms and interrelationships of macro and micronutrients available for soybean." Agronomy Science and Biotechnology 8 (December 2, 2021): 1–15. http://dx.doi.org/10.33158/asb.r150.v8.2022.

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Abstract (sommario):

Nutrients have differences in their functions as metabolic and structural constituents in plant organs. The specific identification of the symptoms of excess or deficiency of nutrients is essential for the correct management to be carried out in order to avoid production losses. In this context, this research aimed to evaluate the symptoms of deficiency and excess of nutrients in soybean. The experiment was carried out on a bench, with 3-liter containers, in which uniformly germinated seedlings were selected for implantation. Initially, the seedlings were subjected to a complete nutrient solut

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Ndakara, Ofudjaye Emmanuel, and Ifeanyi Morrison Atuma. "Characterising Rainwash Nutrient Fluxes and Soil Nutrients under Anacardium occidentale L. (Anacardiaceae) and Lowland Rainforest: implications for Ecosystem Management." Biodiversity Journal 15, no. 2 (2024): 143–55. http://dx.doi.org/10.31396/biodiv.jour.2024.15.2.143.155.

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Abstract (sommario):

This study aimed to ascertain the relationship between rainwash nutrient fluxes and soil nutrient properties under Anacardium occidentale L. (Anacardiaceae) and lowland rainforest for the purpose of sustainable ecosystem management. Both experimental and quasi experimental research designs were adopted. Samples from rainwash (for 12 months) and soil (from 0–15 cm and 15–30cm) were taken from 12 A. occidentale stands and 12 rainforests within 12 stratified quarters. Laboratory analyses of samples involved standard procedures, while data generated where statistically analysed. Results revealed t

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43

Marinov, I., S. C. Doney, and I. D. Lima. "Response of ocean phytoplankton community structure to climate change over the 21st century: partitioning the effects of nutrients, temperature and light." Biogeosciences 7, no. 12 (2010): 3941–59. http://dx.doi.org/10.5194/bg-7-3941-2010.

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Abstract (sommario):

Abstract. The response of ocean phytoplankton community structure to climate change depends, among other factors, upon species competition for nutrients and light, as well as the increase in surface ocean temperature. We propose an analytical framework linking changes in nutrients, temperature and light with changes in phytoplankton growth rates, and we assess our theoretical considerations against model projections (1980–2100) from a global Earth System model. Our proposed "critical nutrient hypothesis" stipulates the existence of a critical nutrient threshold below (above) which a nutrient c

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Hariadi, Badi, Hermantoro Sastrohartono, Andreas Wahyu Krisdiarto, Sukarman Sukarman, Septa Primananda, and Tri Haryo Sagoro. "The Prediction of Nitrogen, Phosphate, and Potassium Contents of Oil Palm Leaf Using Hand-Held Spectrometer." Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 13, no. 1 (2024): 71. http://dx.doi.org/10.23960/jtep-l.v13i1.71-81.

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Abstract (sommario):

A hand-held spectrometer can be used to evaluate oil palm (Elaeis guineensis Jacq.) leaf nutrient contents without being destructive. This study aims to develop regression equations and analyze the performance of the prediction models for Nitrogen, Phosphate, and Potassium leaf nutrient contents. The dependent variable in this study was the result of the analysis of nutrient contents in frond number 17 which was carried out in the laboratory, while the independent variable was the leaf reflectance value scanned with a hand-held spectrometer. The Normalized Difference approach is used to create

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45

Louca, Panayiotis, Olatz Mompeo, Emily R. Leeming, et al. "Dietary Influence on Systolic and Diastolic Blood Pressure in the TwinsUK Cohort." Nutrients 12, no. 7 (2020): 2130. http://dx.doi.org/10.3390/nu12072130.

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Abstract (sommario):

Nutrition plays a key role in blood pressure (BP) regulation. Here, we examine associations between nutrient intakes and BP in a large predominantly female population-based cohort. We assessed the correlation between 45 nutrients (from food frequency questionnaires) and systolic BP/diastolic BP (SBP/DBP) in 3889 individuals from TwinsUK not on hypertensive treatments and replicated in an independent subset of monozygotic twins discordant for nutrient intake (17–242 pairs). Results from both analyses were meta-analysed. For significant nutrients, we calculated heritability using structural equa

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Kraus, Cleber, Marie-Paule Bonnet, Ina de Souza Nogueira, et al. "Unraveling Flooding Dynamics and Nutrients’ Controls upon Phytoplankton Functional Dynamics in Amazonian Floodplain Lakes." Water 11, no. 1 (2019): 154. http://dx.doi.org/10.3390/w11010154.

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Abstract (sommario):

The processes in tropical floodplain lakes enable maintaining phytoplankton nutrient requirements over a hydrological year. The nutrients such as nitrogen, phosphorus and carbon compounds play an essential role in phytoplankton growth. However, the way that nutrients and phytoplankton interact and how this relationship varies seasonally in tropical freshwater ecosystems is not clear. In this study, we evaluate the relationship between phytoplankton–nutrients over the hydrological cycle in Amazonian floodplain lakes and verify if this relationship influences the biomass of cyanobacteria. We als

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47

Guo, Jing, and Yian Gu. "Nutrient-Wide Association Study for Dementia Risks: A Prospective Cohort Study in Middle-Aged and Older Adults." Nutrients 17, no. 12 (2025): 1960. https://doi.org/10.3390/nu17121960.

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Abstract (sommario):

Background/Objectives: Evidence on associations between nutrients and dementia risk is limited and inconsistent. We aimed to systematically examine associations between 101 dietary nutrients and dementia incidence with a nutrient-wide association study (EWAS). Methods: We analyzed data from 6280 participants aged 50 years and older from the Health and Retirement Study. Levels of nutrient intake were measured with the food frequency questionnaire. Dementia status was assessed with the Lang–Weir Classification of Cognitive Function. In the EWAS analysis, the Cox proportional hazards regression m

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48

Thomson, V. P., and M. R. Leishman. "Survival of native plants of Hawkesbury Sandstone communities with additional nutrients: effect of plant age and habitat." Australian Journal of Botany 52, no. 2 (2004): 141. http://dx.doi.org/10.1071/bt03047.

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Abstract (sommario):

Australian soils are naturally low in nutrient concentrations, particularly nitrogen (N) and phosphorus (P). Native plants are well adapted to low-nutrient soils, and can be adversely affected when exposed to higher concentrations of nutrients. The Hawkesbury Sandstone soils in northern Sydney are naturally low in nutrients, but often receive additional nutrient input from urban stormwater run-off. Increases in soil nutrients in urban bushland are associated with the presence of exotic species, and the decline in the diversity of native species. This study tested the hypothesis that high conce

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49

Yamamoto, K., and T. Suetsugi. "Estimation of particulate nutrient load usingturbidity meter." Water Science and Technology 53, no. 2 (2006): 311–20. http://dx.doi.org/10.2166/wst.2006.065.

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Abstract (sommario):

The “Nutrient Load Hysteresis Coefficient” was proposed to evaluate the hysteresis of the nutrient loads to flow rate quantitatively. This could classify the runoff patterns of nutrient load into 15 patterns. Linear relationships between the turbidity and the concentrations of particulate nutrients were observed. It was clarified that the linearity was caused by the influence of the particle size on turbidity output and accumulation of nutrients on smaller particles (diameter &lt;23 μm). The L-Q-Turb method, which is a new method for the estimation of runoff loads of nutrients using a regr

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50

Cui, Yaqi, and Qin Yue. "Regional Soil Nutrient Content Prediction Model Based on Big Data." Journal of Physics: Conference Series 2555, no. 1 (2023): 012005. http://dx.doi.org/10.1088/1742-6596/2555/1/012005.

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Abstract (sommario):

Abstract Soil nutrients play a decision-making role in environmental management, and the prediction of soil nutrients can be used to achieve precise fertilization and regulate production. In response to the problem of low accuracy of soil nutrient content prediction by traditional prediction models, this paper designs a prediction model of soil nutrient content based on big data statistics. Soil nutrient content data are collected using a spectral collector, and the data are smoothed, standardized, and orthogonalized to eliminate the data that affect the prediction accuracy. The processed spec

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