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5 results for “phosphorus uptake”
Dataset for "Fertilizer value of dairy processing waste materials and contributions of soil microorganisms towards phosphorus uptake in grasses."
<p>This file includes the dataset used for the analysis of the fertilizer value from dairy processing waste materials and the contribution of soil microorganisms towards P uptake. More information in the linked future publication</p>
Data from: Experimental evidence that phosphorus fertilization and arbuscular mycorrhizal symbiosis can reduce the carbon cost of phosphorus uptake
<p>Data from "Experimental evidence that phosphorus fertilization and arbuscular mycorrhizal symbiosis can reduce the carbon cost of phosphorus uptake". Functional Ecology</p>
Mycorrhizal phosphorus efficiencies and microbial competition drive root P uptake
<p>Phosphorus (P) availability shows large differences among different soil types, affecting P nutrition of forest trees. Chemical binding of P to soil moieties affects partitioning of P between soil particles and solution, affecting soluble P concentrations upon which plants, their associated mycorrhizal symbionts, and microbes feed. The goal of this study was to characterize root P uptake by mycorrhizal and non-mycorrhizal root tips in competition with microbes <i>in situ</i> in the organic and mineral layer of a P-rich and a P-poor forest. We used intact soil cores (0.2m depth) from beech (<i>Fagus sylvatica</i>) forests to tracing the fate of <sup>33</sup>P in soil, plant and microbial fractions. We used the dilution of <sup>33</sup>P in the rhizosphere of each soil layer to estimate the enrichment with new P in mycorrhizal and non-mycorrhizal root tips and root P uptake. In soil cores from P-rich conditions, 25% and 75% of root P uptake occurred in the organic and mineral layer, respectively, whereas in the P-poor forest, 60% occurred in the organic and 40% in the mineral layer. Mycorrhizal P efficiency, determined as enrichment of new P in mycorrhizal root tips, differed between soil layers. Root P uptake was correlated with mycorrhizal P efficiency and root tip abundance but not with root tip abundance as a single factor. This finding underpins the importance of the regulation of mycorrhizal P acquisition for root P supply. The composition of mycorrhizal assemblages differed between forests but not between soil layers. Therefore, differences in P efficiencies resulted from physiological adjustments of the symbionts. Non-mycorrhizal root tips were rare and exhibited lower enrichment with new P than mycorrhizal root tips. Their contribution to root P supply was negligible. Microbes were strong competitors for P in P-poor but not in P-rich soil. Understory roots were present in the P-rich soil but did not compete for P. Our results uncover regulation of mycorrhizal P efficiencies and highlight the complexity of biotic and abiotic factors that govern P supply to trees in forest ecosystems.</p>
Data used to generate figures in 'Autotrophic Dissolved Organic Phosphorus Uptake Stimulates Nitrogen Fixation in Subtropical Gyres'
<p>Data used to generate figures in '<strong><span>Autotrophic Dissolved Organic Phosphorus Uptake Stimulates Nitrogen Fixation in Subtropical Gyres</span></strong>' by Shen and Wang</p> <p> </p> <p><span>Figure2.mat</span></p> <p><span>up2d: Integrated Euphotic Zone’s DOP uptake rate (mmol P m^{-2} yr^{-1}) (Fig. 2a)</span></p> <p><span>per: Contribution percentage of DOP uptake to net primary production(NPP) (Fig. 2b)</span></p> <p><span> </span></p> <p><span>Figure3.mat</span></p> <p><span>NFtmp: Global distribution of microbial N<sub>2</sub> fixation rate (mmol N m^{-2} yr^{-1}) (Fig. 3a)</span></p> <p><span>fn2p: </span><span>N:P of exported material from euphotic zone (Fig. 3b)</span></p> <p><span>NFdif: N<sub>2</sub> fixation anomaly (mmol N m^{-2} yr^{-1}) (Fig. 3c)</span></p> <p><span>difper: N<sub>2</sub> fixation anomaly in percentage (Fig. 3d)</span></p> <p><span> </span></p> <p><span>Figure4.mat</span></p> <p><span>rdop: </span><span>Contribution of newly fixed N to export production (Fig. 4a)</span></p> <p><span>dif: Anomaly of contributions of newly fixed N to export production (Fig. 4b)</span></p> <p><span>mass2d: </span><span>Annual Net Community Production (mg C m^{-2} day^{-1}) (Fig.4c)</span></p>
Mycorrhizal phosphorus efficiencies and microbial competition drive root P uptake
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