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Artículos de revistas sobre el tema "Nutrient"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Comerford, N. B., W. P. Cropper, Jr., Hua Li, et al. "Soil supply and nutrient demand (SSAND): A general nutrient uptake model and an example of its application to forest management." Canadian Journal of Soil Science 86, no. 4 (2006): 655–73. http://dx.doi.org/10.4141/s05-112.

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Models of soil nutrient bioavailability and uptake assist in nutrient management and lead to a better understanding of nutrient dynamics in the soil-plant system. SSAND (Soil Supply and Nutrient Demand) is a steady state, mechanistic nutrient uptake simulation model based on mass flow and diffusive supply of nutrients to roots. It requires user inputs for soil and plant parameters to calculate a nutrient’s concentration at the root surface and the subsequent uptake by a plant root and/or extrametrical mycorrhizal hyphae. It can be considered a sub-model linked to hydrological or plant growth m

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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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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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10

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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11

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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12

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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13

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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14

Slade, A. H., R. J. Ellis, M. van den Heuvel, and T. R. Stuthridge. "Nutrient minimisation in the pulp and paper industry: an overview." Water Science and Technology 50, no. 3 (2004): 111–22. http://dx.doi.org/10.2166/wst.2004.0175.

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This paper reviews nutrient issues within the pulp and paper industry summarising: nitrogen and phosphorus cycles within treatment systems; sources of nutrients within pulping and papermaking processes; minimising nutrient discharge; new approaches to nutrient minimisation; and the impact of nutrients in the environment. Pulp and paper industry wastewaters generally contain insufficient nitrogen and phosphorus to satisfy bacterial growth requirements. Nutrient limitation has been linked to operational problems such as sludge bulking and poor solids separation. Nutrients have been added in conv

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15

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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16

Nabilla, Sarah, Retno Hartati, and Ria Azizah Tri Nuraini. "Hubungan Nutrien Pada Sedimen dan Penutupan Lamun Di Perairan Jepara." Jurnal Kelautan Tropis 22, no. 1 (2019): 42. http://dx.doi.org/10.14710/jkt.v22i1.4252.

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The availability of nutrients in seagrass beds can act as growth limiting factors. Absorption of nutrients in the water column is carried out by the leaves while the absorption of nutrients from the sediment is carried out by the roots but does not rule out the transport of nutrients by the roots will also arrive at the leaves of the seagrass. If the nutrient requirement is not met properly, then the growth will be disrupted. Like the difference in distribution and density of seagrass itself. Nutrient concentrations in waters vary. Nitrate and phosphate levels in the waters are strongly influe

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17

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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18

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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19

White, Robin R. "346 Nutritional Strategies to Enhance Nutrient Retention in Cattle, Fields, and Farms." Journal of Animal Science 99, Supplement_3 (2021): 194. http://dx.doi.org/10.1093/jas/skab235.350.

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Abstract Nutrient retention within livestock systems is a critical goal for enhancing efficiency of food production and promoting sustainable livestock farming. We define nutrient retention as the sequestering of C, N, and P within biotic elements of farming systems in sinks which have minimal loss to environmentally detrimental ends. Our objective is to summarize strategies to improve nutrient retention from ruminant animal production systems using nutritional management. Nutritional strategies for nutrient retention within animals and downstream food products include dilution of maintenance;

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20

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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21

Rozane, Danilo Eduardo, Betania Vahl de Paula, George Wellington Bastos de Melo, et al. "Compositional Nutrient Diagnosis (CND) Applied to Grapevines Grown in Subtropical Climate Region." Horticulturae 6, no. 3 (2020): 56. http://dx.doi.org/10.3390/horticulturae6030056.

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Soil analysis is used to estimate nutrient availability, but nutrient concentrations are not always related to yield in most fruit plants, including grapevines. Thus, additional multivariate mathematical models, such as the compositional nutrient diagnosis (CND), which takes into account leaves nutrient concentration, and yield, can contribute to estimating critical levels or sufficiency bands of elements, as well as to detect deficiency and/or excess of nutrients. The aim of the present study was to establish CND standards, and the critical level and sufficiency band of nutrients, in the grap

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22

Scalon, Marina Corrêa, Imma Oliveras Menor, Renata Freitag, et al. "Contrasting strategies of nutrient demand and use between savanna and forest ecosystems in a neotropical transition zone." Biogeosciences 19, no. 15 (2022): 3649–61. http://dx.doi.org/10.5194/bg-19-3649-2022.

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Abstract. The total demand for and uptake of nutrients by vegetation is rarely quantified or compared across vegetation types. Here, we describe different nutrient use and allocation strategies in neotropical savanna (cerrado) and transitional forest (cerradão) tree communities composed of different species, report leaf nutrient resorption and calculate ecosystem-level nutrient use efficiency. We couple net primary productivity (NPP) estimates with nutrient stoichiometry to quantify nutrient demand and nutrient flows at the whole-stand scale for different components of vegetation biomass. Spec

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23

Song, Jinnan, Jingli Yang, and Byoung Ryong Jeong. "Characterization of Physiology, Photosynthesis, and Nutrition Based on Induced Deficiencies of Macro- and Micronutrients in Basil (Ocimum basilicum L.)." Agronomy 14, no. 1 (2024): 208. http://dx.doi.org/10.3390/agronomy14010208.

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Basil (Ocimum basilicum L.) contains abundant nutrients and is considered an economically important edible vegetable. The optimal nutrient levels will increase the productivity and basil quality. However, prominent research on basil regarding the diagnostic nutrient deficiency standard and the corresponding nutrient uptake is still scarce. To this end, the basil plants were hydroponically cultured and subjected to one of 14 nutrient solution treatments, corresponding to the omission of a single nutrient element (designated as -N, -P, -K, -Ca, -Mg, -NH4+, -NO3−, -S, -Fe, -Mn, -B, -Zn, -Mo, and

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24

Gao, Jie, Jiangfeng Wang, and Yanhong Li. "Effects of Soil Nutrients on Plant Nutrient Traits in Natural Pinus tabuliformis Forests." Plants 12, no. 4 (2023): 735. http://dx.doi.org/10.3390/plants12040735.

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In light of global warming, the interaction between plant nutrient traits and soil nutrients is still unclear. Plant nutrient traits (e.g., N and P) and their stoichiometric relationships (N/P ratio) are essential for plant growth and reproduction. However, the specific role of soil nutrients in driving variation in plant nutrient traits remains poorly understood. Fifty natural Pinus tabuliformis forests were used as the research object to clarify the interaction between plant nutrient traits and soil nutrients. We show that: (1) The Nmass, Pmass and N/P ratios of leaves were significantly hig

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25

Maia, Janini Tatiane Lima Souza, Hermínia Emília Prieto Martinez, Junia Maria Clemente, Marilia Contin Ventrella, and Carla do Carmo Milagres. "Growth, nutrient concentration, nutrient accumulation and visual symptoms of nutrient deficiencies in cherry tomato plants." Semina: Ciências Agrárias 40, no. 2 (2019): 585. http://dx.doi.org/10.5433/1679-0359.2019v40n2p585.

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Tomato is one of the most popular vegetables, with high nutrient demand. The nutrient concentration can vary depending on the development phase, cultivation system, temperature, soil conditions, luminosity, relative humidity and management practices. The aim of this work was to characterize cherry tomato visual symptoms of deficiency, as well as the effect of nutritional restriction on the development and nutrient concentration of plants cultivated in nutrient solution. Plants of the cherry tomato, cultivar Sindy, were grown in green house. We have used eleven treatments, one control with comp

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26

Anderson, Wendy B., and William G. Eickmeier. "Physiological and morphological responses to shade and nutrient additions of Claytonia virginica (Portulacaceae): implications for the "vernal dam" hypothesis." Canadian Journal of Botany 76, no. 8 (1998): 1340–49. http://dx.doi.org/10.1139/b98-134.

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Because of their unique phenology and physiology, spring ephemeral herbs are believed to play an important role in intrasystem nutrient cycling in deciduous forest ecosystems. It was hypothesized that they function as a "vernal dam" by temporarily sequestering nutrients and preventing leaching from the system during a period of high nutrient availability. However, spring ephemerals require high-irradiance growing conditions. How do their physiological and morphological responses to ambient light and shade limit their ability to sequester excess nutrients? We performed field experiments using C

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27

Grant, Cynthia, Noura Ziadi, Bernard Gagnon, Don Flaten, and Jeff Schoenau. "Integrating knowledge of nutrient forms and dynamics into improved nutrient management practices: Atribute to Régis Simard." Canadian Journal of Soil Science 89, no. 2 (2009): 133–44. http://dx.doi.org/10.4141/cjss07095.

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Régis Simard and his colleagues developed a research program focussing on the agronomic and environmental impacts of nutrients in agricultural systems. The success of this program resulted from an integrated approach, linking assessment of nutrient availability to an understanding of nutrient dynamics in the soil, and applying this understanding to development of improved management practices for a variety of nutrient sources. Research into nutrient availability conducted by Régis and his co-workers led to improvements in quantification of nutrient supply, using traditional soil analysis with

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28

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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29

Masriah, Masriah. "Pengaruh Berbagai Perlakuan Nutrisi Larutan Hidroponik Pada Pertumbuhan Tanaman Kangkung (Ipomoea aquatica)." BIOSCIENTIAE 17, no. 2 (2021): 47. http://dx.doi.org/10.20527/b.v17i2.3452.

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Hydroponic cultivation systems are often applied to overcome the shortage of agricultural land in this case food crops, especially vegetables. Nutrient Film Technique (NFT) is the one of various ways to grow crops hydroponically. Hydroponic systems are carried out without the use of soil media and it can be an alternative solution for the efficient use of land. Uniformity of nutrients and nutrient solution concentration levels required to be adjusted. Nutrient solution as a water supply source and minerals. Nutrition is an important factor for the growth and quality of hydroponic plants should

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Gautam, Tilak Prasad, and Tej Narayan Mandal. "Storage and Flux of Nutrients in Disturbed and Undisturbed Tropical Moist Forest of Eastern Nepal." International Journal of Forestry Research 2018 (October 18, 2018): 1–12. http://dx.doi.org/10.1155/2018/8516321.

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The disturbance activities in tropical forests shrink the nutrient cycling between the vegetation and soil. To understand the nutrient cycling in undisturbed and disturbed stands of mixed deciduous tropical forest of eastern Nepal, plant biomass was estimated within seventy randomly established sampling plots. The biomass values were multiplied with nutrient concentration of respective parts to estimate the nutrient stocks. The nutrient concentrations varied widely amongst components. In trees, concentrations of all nutrients were highest in leaves followed in decreasing order by fine roots (&

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Schoenau, J. J., and J. G. Davis. "Optimizing soil and plant responses to land-applied manure nutrients in the Great Plains of North America." Canadian Journal of Soil Science 86, no. 4 (2006): 587–95. http://dx.doi.org/10.4141/s05-115.

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Animal manures are recognized as valuable sources of plant nutrients in cropping systems and also play a role in soil improvement through the input of organic matter. Using recent research examples from Saskatchewan and Colorado, this paper covers beneficial management practices for effective recycling of manure nutrients applicable to the Great Plains region of North America. Challenges in using animal manures as fertilizers include low nutrient content per unit weight, variability and availability of nutrient content, and a balance of available nutrients that often does not meet the relative

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32

Benmoussa, Mohamed, and Laurent Gauthier. "Modeling Nutrient Uptake and Prolonged Use of Nutrient Solutions in Soilless Tomato Culture." HortScience 30, no. 4 (1995): 761F—761. http://dx.doi.org/10.21273/hortsci.30.4.761f.

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In soilless culture, the buffering capacity of the root environment for nutrients is low. This, combined with fluctuations of climatic factors and changes in nutrient uptake rates, can lead to nutrient imbalances. In order to achieve high yield and better quality, it is necessary to keep the nutrient concentrations in the root environment at the target levels. This requires frequent analysis and adjustments to the nutrient solution. Currently, leaching of the growing media or renewal of the nutrient solution is commonly used to avoid accumulation or depletion of nutrient in the root environmen

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Benmoussa, Mohamed, and Laurent Gauthier. "Modeling Nutrient Uptake and Prolonged Use of Nutrient Solutions in Soilless Tomato Culture." HortScience 30, no. 4 (1995): 761F—761. http://dx.doi.org/10.21273/hortsci.30.4.761.

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In soilless culture, the buffering capacity of the root environment for nutrients is low. This, combined with fluctuations of climatic factors and changes in nutrient uptake rates, can lead to nutrient imbalances. In order to achieve high yield and better quality, it is necessary to keep the nutrient concentrations in the root environment at the target levels. This requires frequent analysis and adjustments to the nutrient solution. Currently, leaching of the growing media or renewal of the nutrient solution is commonly used to avoid accumulation or depletion of nutrient in the root environmen

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34

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. 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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35

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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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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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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37

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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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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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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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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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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40

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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41

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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42

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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Aarons, Sharon R., Cameron J. P. Gourley, and J. Mark Powell. "Estimating Excreted Nutrients to Improve Nutrient Management for Grazing System Dairy Farms." Animals 13, no. 8 (2023): 1404. http://dx.doi.org/10.3390/ani13081404.

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Improving nutrient management in grazing system dairy farms requires determining nutrient flows through animals, the placement of cows within farms and potential for collection, and the re-use and loss of nutrients. We applied a model incorporating data collected at a range of temporal and spatial scales to quantify nutrient excretion in all locations that lactating herds visited on five days over a year on 43 conventional and organic grazing system dairy farms. The calculated nutrient loads excreted by cows in different places were highly skewed; while N, P and K deposited loads were consiste

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Roberts, Roland K. "Plant Nutrient Demand Functions for Tennessee with Prices of Jointly Applied Nutrients." Journal of Agricultural and Applied Economics 18, no. 2 (1986): 107–12. http://dx.doi.org/10.1017/s0081305200006154.

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AbstractSeveral studies have estimated plant nutrient demand functions for nitrogen, phosphate, and potash. All included own-price effects but excluded prices of jointly applied nutrients. In this study, nutrient demand functions, which include prices of all three nutrients, are estimated for Tennessee by seemingly unrelated regression. Results suggest that cross-price eflfects are important in determining plant nutrient demand, at least in the case of Tennessee, and that multicollinearity need not be a hindrance in all cases to including cross-price eflfects in plant nutrient demand models.

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Moore, C. Mark. "Diagnosing oceanic nutrient deficiency." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2081 (2016): 20150290. http://dx.doi.org/10.1098/rsta.2015.0290.

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The supply of a range of nutrient elements to surface waters is an important driver of oceanic production and the subsequent linked cycling of the nutrients and carbon. Relative deficiencies of different nutrients with respect to biological requirements, within both surface and internal water masses, can be both a key indicator and driver of the potential for these nutrients to become limiting for the production of new organic material in the upper ocean. The availability of high-quality, full-depth and global-scale datasets on the concentrations of a wide range of both macro- and micro-nutrie

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Shi, Jing, Yanhua Ning, and Weijuan Kong. "COMPARISON OF ENERGY AND NUTRIENT INTAKE WITH DIETARY GUIDELINE OF RURAL ELDERS AND ITS CONTACT WITH OXIDATIVE STRESS." Innovation in Aging 8, Supplement_1 (2024): 1037. https://doi.org/10.1093/geroni/igae098.3338.

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Abstract The aging in rural areas has surpassed that in urban areas, becoming increasingly severe, and the health status of the older should be of concern. Diet and nutrient intake are important influencing factors for the occurrence and development of chronic diseases, and are currently relatively easy to control. Previous studies have shown that oxidative stress is a common pathogenic mechanism of chronic diseases. This cross sectional study invited 376 older residents from 3 rural communities to complete a dietary survey and collect blood samples for calculating dietary intake and laborator

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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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Mukhina, Irina, Elena Rizhiya, and Tatiana Bankina. "Biochar Effect on Nutrients Availability to Barley." Environmental Research, Engineering and Management 76, no. 2 (2020): 43–53. http://dx.doi.org/10.5755/j01.erem.76.2.21854.

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Biochar can serve as a soil ameliorant preventing nutrient leaching. Due to its porous structure and chemical composition, it can also adsorb elements on its surface. However, various biochars have different sorption ability, and the mechanistic understanding of nutrient storage in biochar is missing. It is not clear if nutrients adsorbed by biochar will be available for plants. Therefore, it is necessary to investigate biochar efficacy in pure substrates to characterise its specific influence on plants. In this study, the sorption capacity and ability of the wood-based biochar to provide barl

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Cai, Zhi-quan, and Frans Bongers. "Contrasting nitrogen and phosphorus resorption efficiencies in trees and lianas from a tropical montane rain forest in Xishuangbanna, south-west China." Journal of Tropical Ecology 23, no. 1 (2007): 115–18. http://dx.doi.org/10.1017/s0266467406003750.

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Tropical montane rain forest is widely considered to be a highly threatened hotspot of global diversity (Brummitt & Nic Lughadha 2003), and one of the least understood humid tropical forest ecosystems in terms of nutrient cycling (Bruijnzeel & Proctor 1995). There is, therefore, an urgent need to improve our understanding of nutrient cycling processes in this ecosystem, including the absorption of nutrients (mainly N and P) from senescing leaves, which may be a key component of adaptive mechanisms that conserve limiting nutrients (Killingbeck 1996). Nutrients which are not resorbed, ho

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