Estimation of the P fertilizer demand of China using the LePA model

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dc.contributor.authorYu, Wenjia
dc.contributor.authorLi, Haigang
dc.contributor.authorNkebiwe, Peteh Mehdi
dc.contributor.authorLi, Guohua
dc.contributor.authorMüller, Torsten
dc.contributor.authorZhang, Junling
dc.contributor.authorShen, Jianbo
dc.date.accessioned2024-11-06T10:17:35Z
dc.date.available2024-11-06T10:17:35Z
dc.date.issued2021de
dc.description.abstractModern phosphate (P) fertilizers are sourced from P rock reserves, a finite and dwindling resource. Globally, China is the largest producer and consumer of P fertilizer and will deplete its domestic reserves within 80 years. It is necessary to avoid excess P input in agriculture through estimating P demand. We used the legacy P assessment model (LePA) to estimate P demand based on soil P management at the county, regional, and country scales according to six P application rate scenarios: (1) rate in 2012 maintained; (2) current rate maintained in low-P counties and P input stopped in high-P counties until critical Olsen-P level (CP) is reached, after which rate equals P-removal; (3) rate decreased to 1–1.5 kg ha−1 year−1 in low-P counties after CP is reached and in high-P counties; (4) rate in each county decreased to 1–8 kg ha−1 year−1 after soil Olsen-P reached CP in low P counties; (5) rate in each county was kept at P-removal rate after reduction; (6) P input was kept at the rate lower than P-offtake rate after reduction. The results showed that the total P fertilizer demand of China was 750 MT P2O5, 54% of P fertilizer can be saved from 2013 to 2080 in China, and soil Olsen-P of all counties can satisfy the demand for high crop yields. The greatest potential to decrease P input was in Yangtze Plain and South China, which reached 60%. Our results provide a firm basis to analyze the depletion of P reserves in other countries.en
dc.identifier.swb1782030654
dc.identifier.urihttps://hohpublica.uni-hohenheim.de/handle/123456789/16880
dc.identifier.urihttps://doi.org/10.3389/fenvs.2021.759984
dc.language.isoengde
dc.rights.licensecc_byde
dc.source2296-665Xde
dc.sourceFrontiers in environmental science; Vol. 9 (2021) 759984de
dc.subjectLegacy soil P
dc.subjectLePA model
dc.subjectSoil P management
dc.subjectP demand
dc.subjectChina
dc.subject.ddc630
dc.titleEstimation of the P fertilizer demand of China using the LePA modelen
dc.type.diniArticle
dcterms.bibliographicCitationFrontiers in environmental science, 9 (2021), 759984. https://doi.org/10.3389/fenvs.2021.759984. ISSN: 2296-665X
dcterms.bibliographicCitation.issn2296-665X
dcterms.bibliographicCitation.journaltitleFrontiers in environmental science
dcterms.bibliographicCitation.volume9
local.export.bibtex@article{Yu2021, url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16880}, doi = {10.3389/fenvs.2021.759984}, author = {Yu, Wenjia and Li, Haigang and Nkebiwe, Peteh Mehdi et al.}, title = {Estimation of the P Fertilizer Demand of China Using the LePA Model}, journal = {Frontiers in environmental science}, year = {2021}, }
local.export.bibtexAuthorYu, Wenjia and Li, Haigang and Nkebiwe, Peteh Mehdi et al.
local.export.bibtexKeyYu2021
local.export.bibtexType@article

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