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Artykuły w czasopismach na temat „Plant nutrient ratios”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Parent, Léon Etienne. "Compositional and Machine Learning Tools to Model Plant Nutrition: Overview and Perspectives." Horticulturae 11, no. 2 (2025): 161. https://doi.org/10.3390/horticulturae11020161.

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The ceteris paribus assumption that all features are equal except the one(s) being examined limits the reliability of nutrient diagnosis and fertilizer recommendations. The objective is to review machine learning (ML) and compositional data analysis (CoDa) tools to make nutrient management feature specific. The average accuracy of the ML methods was 84% across the crops. The additive and orthogonal log ratios of CoDa reduce a D-parts soil composition to D-1 variables, alleviating redundancy in the predictive ML models. Using a Brazilian onion (Allium cepa) database, the combined CoDa and ML me

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Parent, Léon-Étienne. "Diagnosis of the nutrient compositional space of fruit crops." Revista Brasileira de Fruticultura 33, no. 1 (2011): 321–34. http://dx.doi.org/10.1590/s0100-29452011000100041.

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Tissue analysis is a useful tool for the nutrient management of fruit orchards. The mineral composition of diagnostic tissues expressed as nutrient concentration on a dry weight basis has long been used to assess the status of 'pure' nutrients. When nutrients are mixed and interact in plant tissues, their proportions or concentrations change relatively to each other as a result of synergism, antagonism, or neutrality, hence producing resonance within the closed space of tissue composition. Ternary diagrams and nutrient ratios are early representations of interacting nutrients in the compositio

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Ali, Ashfaq, Majid Hussain, Saqib Ali, et al. "Ecological Stoichiometry in Pinus massoniana L. Plantation: Increasing Nutrient Limitation in a 48-Year Chronosequence." Forests 13, no. 3 (2022): 469. http://dx.doi.org/10.3390/f13030469.

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Stoichiometric ratios of carbon (C), nitrogen (N), and phosphorus (P) are considered indicators of nutrient status and ultimate ecosystem health. A detailed investigation of these elements in the leaves, branches, forest layer vegetation and soil, depending on stand age, was carried out. We investigated the effects of stand age (9-, 18-, 28-, and 48-year) on the aboveground plant parts (leaf, branch, herb, shrub, plant litter) and belowground pools (soil, roots) of P. massoniana plantations. The CNP stoichiometry of trees was affected by stand age. Mean N content in the aboveground parts in th

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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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da Conceição de Matos, Christiano, Rafael da Silva Teixeira, Ivo Ribeiro da Silva, Maurício Dutra Costa, and Antonio Alberto da Silva. "Interspecific competition changes nutrient : nutrient ratios of weeds and maize." Journal of Plant Nutrition and Soil Science 182, no. 2 (2019): 286–95. http://dx.doi.org/10.1002/jpln.201800171.

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Sinclair, Alan G., John D. Morrison, L. Chris Smith, and Ken G. Dodds. "Determination of optimum nutrient element ratios in plant tissue." Journal of Plant Nutrition 20, no. 9 (1997): 1069–83. http://dx.doi.org/10.1080/01904169709365319.

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Ren, Xiaowei, Na Lu, Wenshuo Xu, Yunfei Zhuang, Satoru Tsukagoshi, and Michiko Takagaki. "Growth and Nutrient Utilization in Basil Plant as Affected by Applied Nutrient Quantity in Nutrient Solution and Light Spectrum." Biology 11, no. 7 (2022): 991. http://dx.doi.org/10.3390/biology11070991.

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Quantitative nutrient management has advantages, such as saving resources and improving nutrient utilization, compared with the conventional electrical conductivity management method. The growth and nutrient utilization of vegetables are affected by the integrated environmental conditions such as nutrient supply and light spectrum. This study investigated the effects of applied nutrient quantity (ANQ) (0.5, 1, 2, and 4 times (T) the absorption quantity of nutrients determined in the preliminary experiment, indicated by 0.5T, 1T, 2T, and 4T, respectively) in nutrient solution and red:blue ratio

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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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Liu, Y. Y., M. Ukita, T. Imai, and T. Higuchi. "Recycling mineral nutrients to farmland via compost application." Water Science and Technology 53, no. 2 (2006): 111–18. http://dx.doi.org/10.2166/wst.2006.044.

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Increased cultivation of farmland has resulted in nutrient deficiency and consequently fertility degradation of soils. This research examined the application of composted wastes in terms of the feasibility and effectiveness of recycling plant essential minerals. Minerals in composts (derived from sewage sludge, livestock excrement, and municipal solid wastes, respectively) and in amended soils were observed. Ca/Mg ratios in amended soils and the effect of compost applications (mineral nutrients and heavy metals) on plant uptake were also studied. Results showed that composts, especially those

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Šrůtek, Miroslav. "Growth responses of Urtica dioica to nutrient supply." Canadian Journal of Botany 73, no. 6 (1995): 843–51. http://dx.doi.org/10.1139/b95-092.

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This study examines the effects of nutrient supply (three N–P–K treatments: 75, 225, and 375 kg∙ha−1; 12.5% N, 8.5% P, 16% K) on growth, allometry, and architecture of Urtica dioica L., an expansive clonal plant found throughout Central Europe. Biomass allocation was significantly affected by nutrient supply: higher nutrient doses resulted in less biomass allocation to belowground organs, whereas the period of intensive production of aboveground biomass was prolonged. Shoot height increases with nutrient supply. The height ratios were constant over time. Within each treatment and each harvest,

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Pang, Yue, Jing Tian, Xuan Zhao, et al. "The linkages of plant, litter and soil C:N:P stoichiometry and nutrient stock in different secondary mixed forest types in the Qinling Mountains, China." PeerJ 8 (June 3, 2020): e9274. http://dx.doi.org/10.7717/peerj.9274.

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Background Carbon (C), nitrogen (N) and phosphorus (P) stoichiometric ratios are important indicators of ecosystem function and productivity. However, few studies have assessed the nutrient relationship between plant, litter and soil, and the nutrient stock in different secondary mixed forest types. Methods We investigated the C, N and P concentrations and stoichiometric ratios in trees, understory plants, litter and soil layers in three different secondary mixed forest types (broadleaf mixed forests (BM), broadleaf-conifer mixed forests (BCM) and coniferous mixed forests (CM)) in the Qinling

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Soethe, Nathalie, Johannes Lehmann, and Christof Engels. "Nutrient availability at different altitudes in a tropical montane forest in Ecuador." Journal of Tropical Ecology 24, no. 4 (2008): 397–406. http://dx.doi.org/10.1017/s026646740800504x.

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AbstractWe measured macronutrient concentrations in soils and leaves of trees, shrubs and herbs at 1900, 2400 and 3000 m in an Ecuadorian tropical montane forest. Foliar N, P, S and K concentrations in trees were highest at 1900 m (21.7, 2.2, 1.9 and 10.0 mg g−1). At 2400 and 3000 m, foliar concentrations of N, P, S and K were similar to nutrient concentrations in tropical trees with apparent nutrient deficiency, as presented in literature. Unlike foliar nutrient concentrations, the amounts of plant-available nutrients in mineral soil were not affected by altitude or increased significantly wi

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Zhang, Lin, Lijuan Liu, Kaiwen Pan, et al. "Post-wildfire soil and plant foliar nutrient ratios and soil fungi : bacterial ratios in alpine meadows on the southeastern Qinghai-Tibet Plateau." International Journal of Wildland Fire 24, no. 7 (2015): 933. http://dx.doi.org/10.1071/wf14147.

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Wildfire is increasingly considered as a common ecological phenomenon in grassland. However, little is known about its effects on soil and plant nutrient ratios, especially in alpine ecosystems where wildfires are common. In the present study, nutrient ratios of the post-wildfire surface soil (0–5 cm) and nine dominant plant species leaves, in addition to soil fungi : bacterial ratios (F : B ratios), were investigated in the alpine meadows on the south-eastern Qinghai-Tibet Plateau, approximately 20 months after a high-severity wildfire. The results indicated that the burned sites had lower so

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Ławniczak, Agnieszka. "Variability of nutrient concentrations in sediments and wetland plants during the vegetation season under different sediment moisture conditions." Limnological Review 11, no. 2 (2011): 47–58. http://dx.doi.org/10.2478/v10194-011-0026-0.

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Variability of nutrient concentrations in sediments and wetland plants during the vegetation season under different sediment moisture conditionsChanges of nutrient concentrations in sediments and plant biomass as well as above-ground biomass production of four emergent macrophytes during the vegetation season were studied. Particularly, variations over time in N:P and N:K ratios in sediments between sites with and without vegetation as well as seasonally flooded and permanently flooded sites were investigated. In plant covered sites, biomass production and nutrient concentrations in the four w

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Horrocks, JL, GR Stewart, and WC Dennison. "Tissue nutrient content of Gracilaria spp. (Rhodophyta) and water quality along an estuarine gradient." Marine and Freshwater Research 46, no. 6 (1995): 975. http://dx.doi.org/10.1071/mf9950975.

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Tissue nutrient content of Gracilaria spp. (Rhodophyta) was tested as a bioindicator of water column nutrient availability in the Logan River and southern Moreton Bay, south-eastem Queensland. Macroalgae were incubated for one to two weeks within flow-through incubation chambers suspended in the water column. Tissue nutrient content of Gracilaria spp, and water column nutrients were measured at five sites over a five-month period. Tissue nitrogen content (%N) was correlated with dissolved inorganic nitrogen (DIN) at a site 15 km upstream from the Logan River mouth (r² = 0.81), at the Logan Riv

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Xaxiri, Eirini, Evangelos Darivakis, Ioannis Karavidas, Georgia Ntatsi, and Dimitrios Savvas. "Comparing the Nutritional Needs of Two Solanaceae and One Cucurbitaceae Species Grown Hydroponically under the Same Cropping Conditions." Plants 12, no. 20 (2023): 3642. http://dx.doi.org/10.3390/plants12203642.

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Switching over to closed-loop soilless culture systems, thus preventing pollution of water resources by nitrates and saving water and fertilizers, requires accurate estimations of the mean nutrient-to-water uptake ratios. To contribute to this objective, three fruit vegetable species (tomato, eggplant, cucumber) were grown hydroponically in a floating system under identical cropping conditions to quantify species differences in nutrient uptake. The composition of the nutrient solution used to feed the crops was identical for all species. The total water consumption and the concentrations of mo

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Corrado, Giandomenico, Luigi Formisano, Veronica De Micco, et al. "Understanding the Morpho-Anatomical, Physiological, and Functional Response of Sweet Basil to Isosmotic Nitrate to Chloride Ratios." Biology 9, no. 7 (2020): 158. http://dx.doi.org/10.3390/biology9070158.

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Sweet basil (Ocimum basilicum L.) is a leafy green with a short-production cycle that is emerging as a model species among aromatic plants. Modulating the mineral composition of the nutrient solution has proved to be a valuable tool to uncover the mechanisms and responses that higher plants adopt in relation to the availability of mineral nutrients. The aim of this work was to examine the effects on basil of four isosmotic nutrient solutions with different nitrate to chloride ratios. These two anions share uptake and transport mechanisms in plants and are often considered antagonist. To this g

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Wulff, RD, H. F. Causin, O. Benitez, and P. A. Bacalini. "Intraspecific variability and maternal effects in the response to nutrient addition in Chenopodium album." Canadian Journal of Botany 77, no. 8 (1999): 1150–58. http://dx.doi.org/10.1139/b99-124.

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Intrapopulational variability in the response to nutrient addition was studied in plants of the widespread annual weedChenopodium album L. Five seed "families" (each the progeny of a single individual) were selected at random from a natural population, and the germinated seeds were grown for two generations with either a high or a low nutrient supply. Sequential harvests were performed in which we measured plant height, total biomass, leaf area, root/shoot ratios, and reproductive characteristics for each plant. The data were analysed with two- or three-way analysis of variance. The response t

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Cao, Juan, Ruirui Yan, Xiaoyong Chen, et al. "Grazing Affects the Ecological Stoichiometry of the Plant–Soil–Microbe System on the Hulunber Steppe, China." Sustainability 11, no. 19 (2019): 5226. http://dx.doi.org/10.3390/su11195226.

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Grazing affects nutrient cycling processes in grasslands, but little is known by researchers about effects on the nutrient stoichiometry of plant–soil–microbe systems. In this study, the influence of grazing intensity (0, 0.23, 0.34, 0.46, 0.69, and 0.92 AU ha−1) on carbon (C), nitrogen (N) and phosphorus (P) and their stoichiometric ratios in plants, soil, and microbes was investigated in a Hulunber meadow steppe, Northeastern China. The C:N and C:P ratios of shoots decreased with grazing increased. Leaf N:P ratios <10 suggested that the plant communities under grazing were N-limited. Heav

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Ma, Wenjing, Jin Li, Saheed Olaide Jimoh, et al. "Stoichiometric ratios support plant adaption to grazing moderated by soil nutrients and root enzymes." PeerJ 7 (June 10, 2019): e7047. http://dx.doi.org/10.7717/peerj.7047.

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Background Vegetation succession is one of the major driving processes of grassland degradation. Stoichiometry significantly contributes to vegetation dynamics. However, a knowledge gap exists in how soil nutrients and root enzymes influence the stoichiometric ratio to affect vegetation dynamics. Methods To address these questions, we selected a dominant species (Leymus chinensis (Trin.) Tzvel.) and a degraded-dominant species (Artemisia frigida Willd.) under different management regimes (enclosure and grazing) on the Inner Mongolia steppe. We measured (i) plant nutrient concentrations, (ii) r

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Moe, Therese F., Dag O. Hessen, and Benoît O. L. Demars. "Juncus Bulbosus Tissue Nutrient Concentrations and Stoichiometry in Oligotrophic Ecosystems: Variability with Seasons, Growth Forms, Organs and Habitats." Plants 10, no. 3 (2021): 441. http://dx.doi.org/10.3390/plants10030441.

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Aquatic plant nutrient concentrations provide important information to characterise their role in nutrient retention and turnover in aquatic ecosystems. While large standing biomass of aquatic plants is typically found in nutrient-rich localities, it may also occur in oligotrophic ecosystems. Juncus bulbosus is able to form massive stands even in very nutrient-dilute waters. Here we show that this may be achieved by tissues with very high carbon-to-nutrient ratios combined with perennial (slow) growth and a poor food source for grazers inferred from plant stoichiometry and tissue nutrient thre

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le Roux, Elizabeth, Laura S. van Veenhuisen, Graham I. H. Kerley, and Joris P. G. M. Cromsigt. "Animal body size distribution influences the ratios of nutrients supplied to plants." Proceedings of the National Academy of Sciences 117, no. 36 (2020): 22256–63. http://dx.doi.org/10.1073/pnas.2003269117.

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Nutrients released through herbivore feces have the potential to influence plant-available nutrients and affect primary productivity. However, herbivore species use nutrients in set stoichiometric ratios that vary with body size. Such differences in the ratios at which nutrients are used leads to differences in the ratios at which nutrients are deposited through feces. Thus, local environmental factors that affect the average body size of an herbivore community (such as predation risk and food availability) influence the ratios at which fecal nutrients are supplied to plants. Here, we assess t

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Nwaishi, Felix, Matthew Morison, Janina Plach, Merrin Macrae, and Richard Petrone. "Carbon and Nutrient Stoichiometric Relationships in the Soil–Plant Systems of Disturbed Boreal Forest Peatlands within Athabasca Oil Sands Region, Canada." Forests 13, no. 6 (2022): 865. http://dx.doi.org/10.3390/f13060865.

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Peatlands store carbon (C), nitrogen (N), and phosphorus (P), and the stoichiometric relationship among them may be modified by ecosystem disturbances, with major implications for boreal peatland ecosystem functions. To understand the potential impact of landscape fragmentation on peatland nutrient stoichiometry, we characterize the stoichiometric ratios of C, N and P in the soil–plant systems of disturbed boreal forest peatlands and also assessed relationships among site conditions, nutrient availability, stoichiometric ratios (C:N:P) and C storage in four sites that represent the forms of di

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Paparozzi, Ellen T. "1033 REDUCING NITROGEN FERTILIZER APPLICATIONS BY BALANCING THE NITROGEN SULFUR RATIO." HortScience 29, no. 5 (1994): 576d—576. http://dx.doi.org/10.21273/hortsci.29.5.576d.

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Fertilizer particularly nitrogen is part of the concern about groundwater contamination. Many floricultural and ornamental plants do not need the high rates of nitrogen that are typically recommended. However, whenever one alters the quantity of a given nutrient the overall nutrient balance, as well as other physiological processes, changes. A brief overview of our research on poinsettias, roses, and chrysanthemums will be presented. Suggested ratios, critical S levels and nutrient problems associated with incorrect balances will be shared. Limitations due to statistical methods and the impact

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Li, Lei, and Bo Liu. "Nitrate and Ammonium Nitrogen Addition Did Not Alter Nutrient Resorption of Dominant Plant in an Alpine Grassland." Atmosphere 14, no. 3 (2023): 555. http://dx.doi.org/10.3390/atmos14030555.

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Worldwide increases in nitrogen deposition rates are influenced by human activities. Although the total amount of N deposition tends to be stable in our country, atmospheric N deposition of the reactive N forms (NO4+-N, NH4+; NO3−-N, NO3−) is remarkably different, and the ratios of NH4+ to NO3− change continuously. Nutrient resorption is a crucial driver of plant nutrient conservation strategies and litter quality. Therefore, the plant nutrient resorption pattern has remarkable ecological significance for nutrient cycling and the community structure of the ecosystem. However, previous studies

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Barrick, Kenneth A., and Anna W. Schoettle. "A comparison of the foliar nutrient status of elfinwood and symmetrically formed tall trees, Colorado Front Range, U.S.A." Canadian Journal of Botany 74, no. 9 (1996): 1461–75. http://dx.doi.org/10.1139/b96-176.

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We tested the hypothesis of nutrient limitation in the trees of the alpine forest – tundra ecotone by comparing the foliar nutrient status of windsculpted elfinwood (also called krummholz) growing at the upper limit of tree success with symmetrically formed toll trees growing at the nearby timberline. The species investigated included Picea engelmannii (Parry) Engelmann, Abies lasiocarpa (Hooker) Nuttall, pinus flexilis james, and Pinus aristata Bailey. The foliar nutrient concentrations of the ecotone trees were similar to other healthy montane forests. Most of the significant differences in

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Parent, L. E., L. Khiari, and A. Pettigrew. "Nitrogen diagnosis of Christmas tree needle greenness." Canadian Journal of Plant Science 85, no. 4 (2005): 939–47. http://dx.doi.org/10.4141/p03-101.

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Christmas tree (Abies balsamea L.) fertilization is generally guided by needle colour or chemical analysis. Our objective was to develop critical values for the traditional critical nutrient range (CNR) and the compositional nutrient diagnosis (CND) of Christmas tree needles for the Quebec Appalachians. We collected survey specimens (n = 174) and obtained a validation dataset made up of 10 paired dark green and pale green stands. The compositional simplex for CND comprised five nutrient concentration values (N, K, P, Ca, and Mg) and a filling value R5 computed from differences between the whol

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Morandeira, Natalia S., Maira P. Gayol, and Darío S. Ceballos. "Limitación por nutrientes en la planicie de inundación del Bajo Río Paraná: análisis de nitrógeno y fósforo foliares en macrófitas." Darwiniana, nueva serie 11, no. 1 (2023): 155–66. http://dx.doi.org/10.14522/darwiniana.2023.111.1100.

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Nitrogen (N) and phosphorus (P) are the most limiting nutrients in natural freshwater wetlands. Flooded marshes dominate in the freshwater wetlands of the Lower Paraná River floodplain (Argentina). The leaf N and P concentration and the N:P ratios were assessed as a first approach to evaluate the nature of nutrient limitation. A total of 96 sites and 131 dominant plant populations (belonging to 50 herbaceous macrophyte species) were sampled in medium hydrometric level conditions. The interspecific variability of leaf nutrients was higher than the intraspecific variability. Foliar N ranged from

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Rodgers, Dylan, Eugene Won, Michael B. Timmons, and Neil Mattson. "Complementary Nutrients in Decoupled Aquaponics Enhance Basil Performance." Horticulturae 8, no. 2 (2022): 111. http://dx.doi.org/10.3390/horticulturae8020111.

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Aquaponics combines raising fish and growing plants by recycling water and nutrients to reduce water consumption and reliance on chemical fertilizers. Coupled aquaponics systems recirculate water between fish and plant crops, whereas decoupled systems send mineralized fish effluent and wastewater unidirectionally to an independent hydroponic loop. Decoupling enables changes to the water, such as pH adjustments and complementary nutrient additions, to promote plant performance. In this study, basil, Ocimum basilicum (L.), was transplanted into 4 L containers filled with decoupled aquaponic (DAP

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Song, Shi Wei, Guo Xiu Liao, Hou Cheng Liu, Guang Wen Sun, and Ri Yuan Chen. "Effect of Ammonium and Nitrate Ratios on Growth and Yield of Chinese Kale." Applied Mechanics and Materials 142 (November 2011): 32–36. http://dx.doi.org/10.4028/www.scientific.net/amm.142.32.

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The effect of different ammonium and nitrate ratios (NH4+-N : NO3--N = 0:100, 25:75, 50:50 and 75:25) on growth and yield of Chinese kale (Brassica alboglabra Bailey) with 3 cultivars were studied in hydroponics. The results indicated that, compared with the complete nitrate treatment, plant height, stem diameter and biomass of Chinese kale were increased in the low enhancement of ammonium (25%) in nutrient solution, while plant growth and biomass were decreased in the medium (50%) and high (75%) enhancement of ammonium. Ammonium enhancement treatments increased the root/shoot ratio of Chinese

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Frost, Paul C., and Andrea L. Hicks. "Human shoreline development and the nutrient stoichiometry of aquatic plant communities in Canadian Shield lakes." Canadian Journal of Fisheries and Aquatic Sciences 69, no. 10 (2012): 1642–50. http://dx.doi.org/10.1139/f2012-080.

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Human activities associated with residential development potentially alter ecological processes in lake littoral zones. We determined how the nutrient stoichiometry of aquatic plant communities relates to residential density around lakes of south-central Ontario. We calculated the elemental composition of entire plant communities from multiple sites in 12 lakes using measurements of individual plant C:N:P ratios and their areal biomass. We found considerable variability in the C:N:P ratios of whole aquatic plant communities among sites and lakes, which was not accounted for by intraspecific va

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Wu, Peng, Hua Zhou, Yingchun Cui, et al. "Stoichiometric Characteristics of Leaf, Litter and Soil during Vegetation Succession in Maolan National Nature Reserve, Guizhou, China." Sustainability 14, no. 24 (2022): 16517. http://dx.doi.org/10.3390/su142416517.

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Carbon (C), nitrogen (N), phosphorus (P) and potassium (K) are the main nutrient elements widely found in soil, litter and leaves, and their stoichiometric ratios are important indicators of ecosystem functions. However, there is little research on the effects that nutrient cycle and vegetation succession have on leaf, litter and soil nutrients and stoichiometric ratios, especially in the fragile karst areas. To reveal the nutrient cycling characteristics and ecosystem stability mechanism during vegetation succession, leaf, litter and soil samples were collected from the herbaceous community (

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Zhang, Nina, Li Wang, Juan Chen, and Zhouping Shangguan. "H2S Crosstalk in Rhizobia Modulates Essential Nutrient Allocation and Transport in Soybean." Agronomy 13, no. 5 (2023): 1332. http://dx.doi.org/10.3390/agronomy13051332.

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Hydrogen sulfide (H2S), a novel gas signaling molecule, plays a crucial role in plant growth and stress response. However, little attention has been devoted to the regulation of H2S on nutrient transport and utilization in legume–rhizobia symbiosis systems. Although we have previously proven that H2S synergized with rhizobia to considerably enhance nitrogen (N) metabolism and remobilization in N-deficient soybeans, it remains uncertain if changes in nutrient absorption, metabolism, and accumulation occur concurrently. Therefore, employing a synergistic treatment of H2S and rhizobia, we examine

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SINGH, K. A., and ARVIND K. RAI. "Nutrient accumulation, distribution and use efficiency in different bamboo plant species in north-eastern hills region of India." Indian Journal of Agricultural Sciences 82, no. 2 (2012): 134–45. http://dx.doi.org/10.56093/ijas.v82i2.15288.

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Nutrient accumulation, distribution and use efficiency in 30 bamboo plant species were studied in a 14 years old bamboosetum at ICAR Research Complex for NEH Region, Arunachal Pradesh Centre. Per cent concentration of N, P, Ca, Mn and Z n in different component of biomass had similar pattern in all the species. It was in the order of leaves > branches > stems and the concentration of K, Mg and Fe was in leaves > stems > branches. The N: P: K ratios of above ground biomass varied in different bamboo plant species (76–706 : 1 : 66–930). They showed that P was most limiting nutrient.

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Brearley, Francis Q., and Muhammad Mansur. "Nutrient stoichiometry of Nepenthes species from a Bornean peat swamp forest." Carnivorous Plant Newsletter 41, no. 3 (2012): 105–8. http://dx.doi.org/10.55360/cpn413.fb162.

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To shed light on the nature of nutrient limitation in carnivorous plant communities, we collected data on foliar nutrient concentrations and ratios from three Nepenthes species and one natural hybrid growing in peat swamp forests of southern Borneo. Due to their low foliar nitrogen concentrations and very low nitrogen:phosphorus ratios, our data strongly suggest that these species are limited by nitrogen availability.

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Chen, Bo, Lyuyi Chen, Lan Jiang, et al. "C:N:P Stoichiometry of Plant, Litter and Soil along an Elevational Gradient in Subtropical Forests of China." Forests 13, no. 3 (2022): 372. http://dx.doi.org/10.3390/f13030372.

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The internal correlation of plant, litter and soil stoichiometric characteristics and their responses to the environment are helpful for revealing nutrient cycling mechanisms. However, few studies have assessed the nutrient relationship between plant, litter and soil and nutrient stock along elevational gradients, which limit the understanding of nutrient relationships in the ecosystem. To gain insight into the forces of nutrient stock and its stoichiometric ecological characteristics along the elevational gradients in forest ecosystem, we investigated the carbon (C), nitrogen (N) phosphorus (

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Deng, Shixin, Kankan Shi, Jiang Ma, Lili Zhang, Luyi Ma, and Zhongkui Jia. "Effects of Fertilization Ratios and Frequencies on the Growth and Nutrient Uptake of Magnolia wufengensis (Magnoliaceae)." Forests 10, no. 1 (2019): 65. http://dx.doi.org/10.3390/f10010065.

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Through this study, the most suitable fertilization ratio, amount and frequency were determined, providing a scientific reference for further fertilization management for Magnolia wufengensis (Magnoliaceae) seedlings. Fertilization is an important cultivation and management measure to maintain forest seedling health and rapid growth. However, improper fertilization can also have unexpected effects: inhibiting seedling growth, increasing the cost of production and contaminating the environment. Thus, to explore the most suitable fertilization treatment for Magnolia wufengensis growth, one-year-

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Rust, Will, Madison Sotkewicz, Zhaoxing Li, Theresa Mercer, and Alice S. Johnston. "Soil–Plant–Pollinator Relationships in Urban Grass and Meadow Habitats: Competing Benefits and Demands of Tall Flowering Plants on Soil and Pollinator Diversity." Diversity 16, no. 6 (2024): 354. http://dx.doi.org/10.3390/d16060354.

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Urban green spaces can be important habitats for soil, plant, and pollinator diversity and the complementary ecosystem functions they confer. Most studies tend to investigate the relationships between plant diversity with either soil or pollinator diversity, but establishing their relationship across habitat types could be important for optimising ecosystem service provision via alternative management (for instance, urban meadows in place of short amenity grass). Here, we investigate soil–plant–pollinator relationships across urban grass and meadow habitats through a range of measured biodiver

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Lal, C. B., C. Annapurna, A. S. Raghubanshi, and J. S. Singh. "Effect of leaf habit and soil type on nutrient resorption and conservation in woody species of a dry tropical environment." Canadian Journal of Botany 79, no. 9 (2001): 1066–75. http://dx.doi.org/10.1139/b01-077.

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We examined 90 dry tropical tree species growing on contrasting soil types (relatively infertile Ultisol and more fertile Inceptisol) for leaf traits such as leaf habit, specific leaf mass (SLM, leaf dry mass per leaf area), leaf chemistry (nutrient concentrations and C/N ratios), and nutrient resorption. Across the species, SLM ranged from 4.06 to 15.74 mg·cm2 in mature leaves and from 2.60 to 15.12 mg·cm2 in senesced leaves. Mature leaf N and P concentrations varied from 0.86% to 4.11% and 0.13% to 0.21%, respectively. Senesced leaf N concentrations varied from 0.49% to 1.90% and P from 0.

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Tsunoda, Tomonori, Naoki Kachi, and Jun-Ichirou Suzuki. "Belowground herbivory decreases shoot water content and biomass of Lolium perenne seedlings under nutrient-poor conditions." Botany 95, no. 1 (2017): 29–36. http://dx.doi.org/10.1139/cjb-2016-0076.

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Belowground herbivory under nutrient-poor conditions is known to significantly decrease plant biomass and root:shoot ratios. However, the mechanisms behind the changes in belowground plant–herbivore interactions that occur under different nutrient conditions remain unclear. We performed a pot experiment using Lolium perenne L. and the third-instar larva of Popillia japonica Newman. The experiment used a three-way factorial randomized-block design; the three factors were nutrient amount (rich/poor), nutrient heterogeneity (homogeneous/heterogeneous), and belowground herbivore (present/absent).

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Wang, Yudan, Xiaoyun Zhang, Houcheng Liu, Guangwen Sun, Shiwei Song, and Riyuan Chen. "High NH4+/NO3− Ratio Inhibits the Growth and Nitrogen Uptake of Chinese Kale at the Late Growth Stage by Ammonia Toxicity." Horticulturae 8, no. 1 (2021): 8. http://dx.doi.org/10.3390/horticulturae8010008.

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The aim of this study was to determine the effects of various NH4+/NO3− ratios in a nutrient solution on the growth and nitrogen uptake of Chinese kale under hydroponic conditions. The four NH4+/NO3− ratios in the nutrient solution were CK (0/100), T1 (10/90), T2 (25/75), and T3 (50/50). An appropriate NH4+/NO3− ratio (10/90, 25/75) promoted the growth of Chinese kale. T2 produced the highest fresh and dry weight among treatments, and all indices of seedling root growth were the highest under T2. A high NH4+/NO3− ratio (50/50) promoted the growth of Chinese kale seedlings at the early stage bu

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Vargová, Vladimíra, Zuzana Kovačiková, and Milan Michalec. "Effects of Rates and Nutrient Ratios on Production and Quality of Phytomass at Fertiliser Application to an Alluvial Meadow." Agriculture (Pol'nohospodárstvo) 58, no. 1 (2012): 1–10. http://dx.doi.org/10.2478/v10207-012-0001-z.

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Effects of Rates and Nutrient Ratios on Production and Quality of Phytomass at Fertiliser Application to an Alluvial Meadow The research objective was to assess effects of fertiliser application rates and nutrient ratios on production and quality of grassland at an alluvial meadow. The initial sward type was Festucetum pratense association. A field trial was established in the western part of "Zvolenská kotlina" basin (altitude 350 m) and consisted of ten fertiliser treatments: zero-fertilised sward (control); fertiliser P and K application; rates of 50, 100, 150 and 200 kg N/ha at two ratios

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Roeling, Ineke S., Wim A. Ozinga, Jerry van Dijk, Maarten B. Eppinga, and Martin J. Wassen. "Plant species occurrence patterns in Eurasian grasslands reflect adaptation to nutrient ratios." Oecologia 186, no. 4 (2018): 1055–67. http://dx.doi.org/10.1007/s00442-018-4086-6.

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Cabrera, Raul I., and Diana R. Devereaux. "Effects of Nitrogen Supply on Growth and Nutrient Status of Containerized Crape Myrtle." Journal of Environmental Horticulture 16, no. 2 (1998): 98–104. http://dx.doi.org/10.24266/0738-2898-16.2.98.

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Abstract Containerized crape myrtle (Lagerstroemia indica x fauriei ‘Tonto’) plants were grown over a 9-month period using complete nutrient solutions, except during overwintering, that differed in N concentration: 15, 30, 60, 120, 210, and 300 mg/liter. Plant shoot biomass, leaf area and canopy diameter increased with applied N concentrations ([N]a) up to 60 mg/liter, but higher levels caused significant depressions in all these parameters. Root biomass and plant height were depressed linearly with increases in [N]a. Regardless of final plant biomass, increases in [N]a significantly favored s

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Scagel, Carolyn F., Guihong Bi, Leslie H. Fuchigami, and Richard P. Regan. "Irrigation Frequency Alters Nutrient Uptake in Container-grown Rhododendron Plants Grown with Different Rates of Nitrogen." HortScience 47, no. 2 (2012): 189–97. http://dx.doi.org/10.21273/hortsci.47.2.189.

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The influence of irrigation frequency (same amount of water per day given at different times) on nutrient uptake of container-grown evergreen Rhododendron ‘P.J.M. Compact’ (PJM) and ‘English Roseum’ (ER) and deciduous Rhododendron ‘Gibraltar’ (AZ) grown with different rates of nitrogen (N) fertilizer was evaluated. Increased N application rate increased nutrient uptake and plant dry biomass. Irrigation frequency did not significantly influence total plant dry biomass; however, more frequent irrigation decreased net uptake of several nutrients including phosphorus (P), boron (B), and manganese

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Vyavahare, Govind Dnyandev, Yejin Lee, Yeong Ju Seok, Han Na Kim, Jwakyung Sung, and Jin Hee Park. "Monitoring of Soil Nutrient Levels by an EC Sensor during Spring Onion (Allium fistulosum) Cultivation under Different Fertilizer Treatments." Agronomy 13, no. 8 (2023): 2156. http://dx.doi.org/10.3390/agronomy13082156.

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Balanced nutrients are essential for healthy plant growth, but there is no sensor available to monitor essential nutrients such as N and K. Electrical conductivity (EC) is one of the key parameters that could be adopted to monitor nutrient contents because soil EC is influenced by the available nutrients. Therefore, the main objective of this study was to examine the effects of different basal fertilizers, including inorganic, organic, and compost fertilizers, and the application ratio of basal and additional fertilizers on nutrient contents with an EC sensor. The applied basal and additional

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Parent, L. E., and M. Dafir. "A Theoretical Concept of Compositional Nutrient Diagnosis." Journal of the American Society for Horticultural Science 117, no. 2 (1992): 239–42. http://dx.doi.org/10.21273/jashs.117.2.239.

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The premises underlying univariate (CVA = critical value approach) and bivariate (DRIS = diagnosis and recommendation integrated system) diagnostic systems were reexamined with regard to compositional data analysis (CDA). CDA recognizes a structure of dependence among plant nutrients, the bounded sum constraint to one (the whole composition equals 100% or 1), and removes the curvature problem carried by crude components and by dual ratios or logratios when treated in isolation. Linearization by “rowcentered logrationing” of nutrient fractions shows great potential for carrying multivariate dia

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Savita, Savita, Krishnappa R, Bidyapati Ngangom, et al. "Diagnosis and Recommendation Integrated System (DRIS) approach on Nutritional Diagnosis in Fruit crops- A Review." Journal of Applied and Natural Science 8, no. 4 (2016): 2337–45. http://dx.doi.org/10.31018/jans.v8i4.1134.

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Diagnosis and Recommendation Integrated System (DRIS) is widely used statistical approach for interpretation of the plant tissue analysis data and to diagnose the plant nutreint needs much earlier than the reduction of crop yield with greater accuracy. It helps in simultaneous identifying imbalances, deficiencies and excesses of crop nutrients and ranks them in the order of their importance for their remedial steps. The DRIS norms based on foliar composition can developed in any crop and at any stage of its development. It provides a mathematical means of ordering large number of nutrient rati

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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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Rueda-Luna, Rolando, Jenaro Reyes-Matamoros, Miriam Romero-Hernández, Raymundo Hernández-Loma, and Abel Cruz-Montalvo. "Influence of the K+/Ca2++Mg2+ ratio in the yield of zucchini (Cucurbita pepo L.)." Revista de la Facultad de Agronomía, Universidad del Zulia 42, no. 1 (2025): e244215. https://doi.org/10.47280/revfacagron(luz).v42.n1.xv.

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Zucchini (Cucurbita pepo L.) is a widely cultivated vegetable that plays a significant role in global food production. Its yield and nutritional composition are influenced by various agronomic factors, including the availability and balance of essential nutrients. Among these, the cationic ratio of potassium (K+), calcium (Ca2+), and magnesium (Mg2+) in the nutrient solution is critical for plant growth and productivity due to their interactive effects on absorption and transport. The objective of this study was to evaluate the impact of different K+/Ca2++Mg2+ ratios on the yield and mineral c

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