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Phosphorus - Astrophysics Data System

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Last Updated: 15 September 2022

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Assessing phosphorus availability to paddy rice: soil testing and plant responses

To achieve rice yield and ecosystem preservation, the optimization of P fertilization in paddy rice fields requires an accurate estimate of soil P availability. Although there are several commonly used ways to determine P availability to crops grown in aerobic soils, the availability of P pool in paddy soils cannot be so easily assessed. The Phosphorus cycle in paddy soils is closely related to Fe redox wheel and conditioned by the complex interactions of soil characteristics and plant strategies to encourage P uptake. Twelve representative paddy soils were chosen and analyzed for available P with different methods, according to the purpose of this review. The objective of this research was to find the method that best estimates P availability for rice plants while still considering the intricate interactions between soil geochemistry and plant responses. During this period, the soil solution's temporal variation of soluble P and Fe was monitored in the soil solution. Following the same trend as Fe, the soluble P concentration in the soil solution increased during the first three to four weeks, and ultimately due to plant uptake and P-Fe co-precipitation.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.9623M/abstract


Investigating factors impacting phosphorus dynamics and phosphate sorption capacity of manure amended soils of Ontario

Manure application as an organic phosphorus fertilizer improves Phosphorus fertilizer supply to plants. It is vital to know P dynamics and P compositions in manure and soils. Soils amended by manure in the 2019 summer have around 1. 17 mg TP g-1 on average, with soils with manure application more than six years ago containing around 0. 97 mg TP g-1 in average. The TP in soils was less than compared to manure with 4. 19 mg TP g-1, indicating poor P fertilization effectiveness. Soil incubation experiments on two soil samples containing potassium dihydrogen phosphate as an inorganic fertilizer were investigated by soil incubation experiments. Phosphorus saturation of these two soils had passed the threshold of P saturation levels in agricultural soils, causing the release of P from solid phase.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..2410836X/abstract


Multiple polarization phases and strong magnetoelectric coupling in the layered transition metal phosphorus chalcogenides T M P 2 X 6 (T =Cu ,Ag ;M =Cr ,V ;X =S ,Se ) by controlling the interlayer interaction and dimension

Here, based on the first-principles' calculations and theoretical model, we propose a new class of single phase multiferroic materials, transition metal phosphorus chalcogenides, T M P 2 X 6 with multiple polarization phases and strong magnetoelectric coupling. The various ferroelectric phases of T M P 2 X 6 bulk's bulk are expected to have different band gaps, providing a method to monitor electronic and transport characteristics by the external electric field. One of the ferroelectric phases, for CuV P 2 S 6 bilayer and few layers, has ferromagnetic ground state and the other has antiferromagnetic states, realizing magnetism field control by electric field control. This paper not only recommends a new class of magnetoelectric multiferroic materials, but also suggests a method to engineer them by controlling interlayer interaction in van der Waals layered materials.

Source link: https://ui.adsabs.harvard.edu/abs/2022PhRvB.106k5403D/abstract


Short-term responses of Inga edulis Mart. seedlings growing under elevated CO2 and phosphorus addition: understanding potential phosphorus constraints on plant responses to elevated CO2 in the understory of a central Amazon forest

In some biomes, the rise in atmospheric CO2 concentration positively affects plant carbon assimilation and carbon stock. However, there are uncertainties about how plants in tropical forests, particularly in the Amazon rainforest, will react to the change, especially in the Amazon rainforest, since a large part of the soils in the area have natural low phosphorus content, which could limit positive effects of elevated CO2. Here, we investigated if P addition would affect leaf primary carbon metabolism and aboveground development responses under elevated CO2. In the understory of a primary forest in Central Amazonia, Brazil, plants grew in pots, half with natural P availability and half with P addition -, half with increased CO2 and half with elevated CO2 - in the interior of a pots. To determine the carbon metabolism, we measured light-saturated net CO2 assimilation, leaf respiration in the light, leaf respiration in the dark, and photorespiration. To determine aboveground growth, we measured plant height and diameter, crown height and diameter, number of leaves, and total leaf area to determine aboveground development. Plants under P. 18 had a greater height and increased crown growth when compared to control or eCO2-only, according to P. In addition, plants had more height and increased crown growth as compared to control or eCO2-only. We did not find differences between +P seedlings under different CO2 treatments, meaning that only P had an effect on these responses. However, forest responses to climate change are still needed to determine whether such responses will persist in the long run and in other species.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.8975N/abstract


Implementing a Terrestrial Nitrogen and Phosphorus Cycle in the Uvic Escm: Validation and first results

In ESMs and EMICS, the implementation of nutrient limitation has shown to increase the carbon feedbacks representation and, consequently, the response of land to atmospheric CO2 rising in simulation scenarios. The nitrogen cycle is a modified version of the initial N model that was launched in 2012, with the most notable additions being the enforcement of N mass conservation and the replacement of a deep land-surface and wetland module that allowed the calculation of N2O and NO fluxes. The P cycle contains the same organic pools as one inorganic P pool, and it estimates that there is an increase of P from rock weathering and losses from leaching and occlusion. The N cycle now conserves mass, the original and added fluxes, as well as the N and P pools, which are within the range of other studies and literature. By the year 2020, the introduction of nutrient restriction effectively represented a nutrient limitation in the CO2fertilization effect, which means that the simulation accurately represents a nutrient limitation. In addition, the CNP simulation's tropical latitudes resulted in a decrease of 33% of the mean GPP and 41% of the vegetation biomass in comparison to the CNP simulation; these findings are in better agreement with observations and with the belief that P limitation has been shown to restrict vegetation especially in tropical regions.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..24.6529D/abstract


Estimates of total phosphorus for Amazonia based on an expanded harmonized soil database

The mineral phosphorus total is considered a fundamental component of life on earth. Using data obtained in the field, we developed equations of pedotransfer function in this research. With independent RAINFOR results, Were's 16 regression models based on the Akaike information standard were validated with R 2 over 65%.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..2411000M/abstract


Atmospheric phosphorus characterization by 31P-NMR during dust events and bioavailability implications

Phosphorus is a primary nutrient that impacts primary productivity in swaths of oceanic oligotrophic and ultraoligotrophic ecosystems. Organic-P derived from bioaerosols and dust, according to new research, can provide as much bioavailable P as inorganic P in dust, making it therefore vital for primary productivity. Organic-P levels in atmospheric samples are usually revealed by subtraction of the amount of phosphorus from the total amount of phosphorus. P that are connected with organic compounds must therefore be identified specifically by a computer. Because it has been a popular scientific instrument for the molecular determination of organic-P in marine plankton, sinking particles, high molecular weight dissolved organic matter, and sediment, nuclear magnetic resonance spectroscopy has been a popular analytical technique for molecular analysis of organic-P in marine plankton, sinking particles, high molecular weight dissolved organic matter, and sediment, nuclear magnetic resonance spectroscopy has demonstrated to be a robust analytical instrument for spectron Here we calculate Total Suspended atmospheric Particles collected during dust outbreaks in the eastern Mediterranean using a high-volume air sampler. The results revealed the typical functional groups in P speciation, which included orthophosphate and monophosphate esters, phosphate diesters, and pyrophosphate. TSP samples were not found to contain phosphonates. P-O-P bonds are present in the marine environment, making them readily hydrolysable in the marine environment by the alkaline phosphatase enzyme, which is a common source of P in aquatic ecosystems. Organic-P estimated colorimetrically is about equal to that measured by 31P NMR, showing that the new method can be used in atmospheric experiments for P speciation.

Source link: https://ui.adsabs.harvard.edu/abs/2022EGUGA..2410122V/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions