Nitrogen isotope measurements may provide insights into changing interactions among plants, mycorrhizal fungi, and soil processes across environmental gradients. Here, we report changes in δ15N signatures due to shifts in species composition and nitrogen (N) dynamics. These changes were assessed by measuring fine root biomass, net N mineralization, and N concentrations and δ15N of …
· title = "Plant nitrogen concentration and isotopic composition in residential lawns across seven US cities", abstract = "Human drivers are often proposed to be stronger than biophysical drivers in influencing ecosystem structure and function in highly urbanized areas.
At species level, plant species richness only had a positive effect on plant Mg concentration (Fig. 2; Table 2), but species identity had a significant effect on plant N, P, K, Ca, and Mg concentrations ().The N and P concentrations of O. javanica and P. arundinacea were significantly higher than the other two species (Fig. 3A and B). The K concentration of R. japonicus was the highest ...
2018-4-18 · Patterns of plant carbon, nitrogen, and phosphorus concentration in relation to productivity in China''s terrestrial ecosystems [Biological Sciences] Proceedings of the National Academy of Sciences of the United States of America ( IF 11.205) Pub Date : 2018-04-17, DOI: 10.1073/pnas.1700295114
We analyzed the effects of water and nitrogen additions on the intra- and inter-annual dynamics of plant nitrogen concentration. We found that water addition of 10 mm×8 times and 40 mm×2 times decreased ecosystem plant N concentration in the dry years, while that of 20 mm×4 times increased ecosystem plant N concentration, but these increases or decreases were not significant statistically.
2019-7-10 · Nitrogen (N) and phosphorus (P) are essential components of the basic cell structure of plants. In particular, leaf N and P concentrations and their stoichiometric relationship largely determine the photosynthesis, growth, reproduction, and ecophysiological processes of plants.
2018-5-17 · Plant Nitrogen Concentration 1. Introduction Nitrogen (N) is one of the essential factors for crop productionin terms of plant growth and development and crop quality [1] [2]. Adequate supply of N is fun-damental for optimizing wheat (Triticum aestivum L.) yield and grain quality [3] [4].
2020-10-13 · Nitrogen concentration and N source displayed an interaction. When N was supplied at concentrations less than 7 mmol·L-1, the N0 3--N to NH/-N ratio was not ... Nitrogen Plant nutrients must be supplied to the developing plant in the form, amount, time,
Nitrogen is an essential element for plant growth and development; however, due to environmental pollution, high nitrate concentrations accumulate in the edible parts of these leafy vegetables, particularly if excessive nitrogen fertilizer has been applied. Consuming these crops can harm human healt …
2016-7-28 · Leaf nitrogen and phosphorus concentration and the empirical regulations in dominant woody plants of shrublands across southern China Jia-Xiang LI 1, 2, Wen-Ting XU 1, Gao-Ming XIONG 1, Yang WANG 1, Chang-Ming ZHAO 1, Zhi-Jun LU 3, Yue-Lin LI 4, Zong-Qiang XIE 1, * ( )
2020-1-22 · concentrations in harvested plant parts. A number of factors can affect the N concentration in harvested plant parts. For most crops included in this report, year of harvest, N availability and variety contributed most to the observed variability. These factors seem to affect N concentrations in field crops, vegetables and tree crops equally.
2019-1-5 · effects of nitrogen concentrations on nodulation and nitrogenase activity of soybean plants. The results showed that in the dual root systems constructed by seedling grafting, the number and weight of root nodules at the N+ side both exhibited a single-peak changing trend of first increasing and then decreasing with nitrogen concentrations.
2021-3-22 · Nitrogen contribution by BNF is the result of multiplying legume total biomass by plant N concentration and by the percentage of N derived from the atmosphere (%Ndfa). Consequently, BNF contributions generally increase linearly with shoot biomass but variations in plant N concentration and %Ndfa may distort this relationship.
Ågren GI, Weih M (2012). Plant stoichiometry at different scales: Element concentration patterns reflect environment more than genotype. New Phytologist, 194, 944–952. Chen Y, Han W, Tang L, Tang Z, Fang J (2013). Leaf nitrogen and phosphorus concentrations of woody plants differ in responses to climate, soil and plant growth form.
The estimation of leaf nitrogen concentration (LNC) in crop plants is an effective way to optimize nitrogen fertilizer management and to improve crop yield. The objectives of this study were to (1) analyse the spectral features, (2) explore the spectral indices, and (3 ...
2 and Plant Nitrogen Concentrations 1367 Relative N content (open symbols), relative NSC content (closed symbols) 60 80 100 120 140 160 180 200 Relative N% (open symbols), relative NSC% (closed symbols) 60 80 100 120 140 160 180 200 1 - Betula pendula 2 - Pinus palustris (–0.5 Mpa) 3 - P. palustris (–1.5 Mpa) 4 - Xanthium strumarium 1 - B ...
2001-2-1 · Plant nitrogen concentration Interruption experiment: Plant tissue concentrations of both forms of N (nitrate N and organic N) and of total N declined over the experimental period in both treatments (Fig. 3). However, in each case these reductions were much more dramatic in the zero‐N plants than those in the well nourished control treatment ...
2020-10-5 · and plant height with remote systems and automated intelligent methods is gaining attention in agriculture practices. With multispectral sensors, at canopy or leaf levels, di erent studies predicted leaf nitrogen concentration (LNC) in maize (Zea mays L.) [16], winter-wheat (Triticum aestivum) [21],
Plant nitrogen concentration, use efficiency, and contents in a tallgrass prairie ecosystem under experimental warming Xuhui Zhou Global Change Biology (2005) 11, 1733–1744, doi: 10.1111/j.1365-2486.2005.01030.x Plant nitrogen concentration, use efficiency, and contents in a tallgrass prairie ecosystem under experimental warming Y U A N A N ...
2021-8-3 · A plant analysis interpretation is based on a comparison of the nutrient concentration found in a particular plant part taken at a specific time with known desired value or ranges in concentration. One method of interpretation is based on "critical values," a critical value being the concentration below which deficiency is likely to occur.
Plants grown under elevated atmospheric [CO2] typically have decreased tissue concentrations of N compared with plants grown under current ambient [CO2]. The physiological mechanisms responsible for this phenomenon have not been definitely established, although a considerable number of hypotheses ha …
The nitrogen concentration dependence of the time to rupture and minimum creep rate of 9Cr-3W-3Co-0.2V-0.05Nb steel containing about 140 ppm boron at 650°C and 120 MPa is shown in Fig. 10.23(a) [63].The peaks of the time to rupture and minimum creep rate are located at about 80 to 100 ppm nitrogen, which corresponds to the maximum solid solubility of nitrogen in equilibrium with BN in the ...
Ratios of Concentrations of Nitrogen to Other Nutrients in Plants The critical concentration of nitrogen is the value in a particular plant part sampled at a given growth stage below which plant growth and yield are suppressed by 5 or 10% .The responses of plants to …
2020-11-20 · Welsh onion (Allium fistulosum L.) constitutes an important plant species cultivated in China due the benefits and applications in different areas. Moreover, nitrogen is an essential nutrient during the growth and development of plant. Here, we present the effects of nitrogen on soil microbiome in welsh onion plants. We used High-throughput sequencing analysis to determine the diversity and ...
Plant nitrogen concentration is more sensitive in response to degradation than phosphorus concentration in alpine meadow. ... Plant N concentration, SWC, STC and STN exhibited the most sensibility to grassland degradation, which were successively significant (P<0.05) reduced by 29.25%, ...
2005-10-1 · Plant nitrogen (N) relationship has the potential to regulate plant and ecosystem responses strongly to global warming but has not been carefully examined under warmed environments. This study was conducted to examine responses of plant N relationship (i.e. leaf N concentration, N use efficiency, and plant N content in this study) to a 4‐year experimental warming in a tallgrass prairie in ...
2017-1-30 · Stream nitrogen concentration, but not plant N-fixing capacity, modulates litter diversity effects on decomposition. Alan M. Tonin, ... A recent study suggested that a plant trait – their nitrogen (N)-fixing capacity – could mediate effects of litter diversity on decomposition by means of a microbial transfer of N from N-fixers to non-fixers.
Fertilizer urea Nitrogen Nutrient Management. Nitrogen is such a vital ingredient to plant life that most industrial fertilizers contain high concentrations of nitrogen compounds such as ammonium nitrateDec 02 32 Nitrogen concentration s in harvested plant parts A literature overview Daniel Geisseler Usually it s just a few days before plants can effectively use the nitrogen the nitrogen ...
2021-4-21 · Estimating plant nitrogen concentration (PNC) has been conducted using vegetation indices (VIs) from UAV-based imagery, but color features have been rarely considered as additional variables. In this study, the VIs and color moments (color feature ...
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