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Half of global agricultural soil phosphorus fertility derived from anthropogenic sources
Nature Geoscience ( IF 15.7 ) Pub Date : 2023-01-05 , DOI: 10.1038/s41561-022-01092-0
Joséphine Demay , Bruno Ringeval , Sylvain Pellerin , Thomas Nesme

The use of mineral phosphorus (P) fertilizers, often referred to as anthropogenic phosphorus, has dramatically altered the global phosphorus cycle and increased soil phosphorus fertility and crop yields. Quantifying agriculture’s reliance on anthropogenic phosphorus requires estimates of its contribution to agricultural soil fertility. Here we present a model of soil phosphorus dynamics simulating phosphorus availability in agricultural soils for individual countries from 1950 to 2017. Distinguishing between anthropogenic and natural phosphorus pools and accounting for farming practices, agricultural trade and crop–livestock recycling, we estimate that the global anthropogenic contribution to available phosphorus in agricultural soils was 47 ± 8% in 2017. Country-level anthropogenic phosphorus signatures vary according to cumulative fertilizer use and phosphorus availability in soil inherited pre-1950, with negligible influence of the trade of feed and food products. Despite different historical trajectories, we find that Western Europe, North America and Asia are similarly reliant on anthropogenic phosphorus, with nearly 60% of the total available phosphorus of anthropic origin in 2017. Conversely, anthropogenic phosphorus inputs in Africa remained low over the study period, contributing only around 30% of available phosphorus. The unequal reliance of agricultural soil fertility and food production systems on anthropogenic phosphorus resources highlights the need for a fairer management of the world’s remaining phosphate rock resources.



中文翻译:

全球农业土壤磷肥力的一半来自人为来源

矿物磷 (P) 肥料(通常称为人为磷)的使用极​​大地改变了全球磷循环并提高了土壤磷肥力和作物产量。量化农业对人为磷的依赖需要估计其对农业土壤肥力的贡献。在这里,我们提出了一个土壤磷动态模型,模拟了 1950 年至 2017 年各个国家农业土壤中磷的有效性。区分人为和自然磷库并考虑耕作方式、农业贸易和作物-牲畜循环,我们估计全球人为2017 年对农业土壤中有效磷的贡献为 47 ± 8%。国家层面的人为磷特征因 1950 年前土壤中累积的化肥使用量和可用磷量而异,饲料和食品贸易的影响可以忽略不计。尽管历史轨迹不同,但我们发现西欧、北美和亚洲同样依赖人为磷,2017 年人为磷占总可用磷的近 60%。相反,非洲的人为磷输入在研究期间仍然很低, 仅贡献了可用磷的 30% 左右。农业土壤肥力和粮食生产系统对人为磷资源的不平等依赖凸显了对世界剩余磷矿资源进行更公平管理的必要性。饲料和食品贸易的影响可以忽略不计。尽管历史轨迹不同,但我们发现西欧、北美和亚洲同样依赖人为磷,2017 年人为磷占总可用磷的近 60%。相反,非洲的人为磷输入在研究期间仍然很低, 仅贡献了可用磷的 30% 左右。农业土壤肥力和粮食生产系统对人为磷资源的不平等依赖凸显了对世界剩余磷矿资源进行更公平管理的必要性。饲料和食品贸易的影响可以忽略不计。尽管历史轨迹不同,但我们发现西欧、北美和亚洲同样依赖人为磷,2017 年人为磷占总可用磷的近 60%。相反,非洲的人为磷输入在研究期间仍然很低, 仅贡献了可用磷的 30% 左右。农业土壤肥力和粮食生产系统对人为磷资源的不平等依赖凸显了对世界剩余磷矿资源进行更公平管理的必要性。2017 年人为来源的可用磷总量的近 60%。相反,非洲的人为磷输入在研究期间仍然很低,仅贡献了可用磷的 30% 左右。农业土壤肥力和粮食生产系统对人为磷资源的不平等依赖凸显了对世界剩余磷矿资源进行更公平管理的必要性。2017 年人为来源的可用磷总量的近 60%。相反,非洲的人为磷输入在研究期间仍然很低,仅贡献了可用磷的 30% 左右。农业土壤肥力和粮食生产系统对人为磷资源的不平等依赖凸显了对世界剩余磷矿资源进行更公平管理的必要性。

更新日期:2023-01-06
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