Sattari S Z, Bouwman A F, Martinez Rodríguez R, Beusen A H W, van Ittersum M K
Plant Production Systems Group, Wageningen University, PO Box 430, 6700 AK Wageningen, The Netherlands.
Department of Earth Sciences-Geochemistry, Faculty of Geosciences, Utrecht University, PO Box 80021, 3508 TA Utrecht, The Netherlands.
Nat Commun. 2016 Feb 16;7:10696. doi: 10.1038/ncomms10696.
Grasslands provide grass and fodder to sustain the growing need for ruminant meat and milk. Soil nutrients in grasslands are removed through withdrawal in these livestock products and through animal manure that originates from grasslands and is spread in croplands. This leads to loss of soil fertility, because globally most grasslands receive no mineral fertilizer. Here we show that phosphorus (P) inputs (mineral and organic) in global grasslands will have to increase more than fourfold in 2050 relative to 2005 to achieve an anticipated 80% increase in grass production (for milk and meat), while maintaining the soil P status. Combined with requirements for cropland, we estimate that mineral P fertilizer use must double by 2050 to sustain future crop and grassland production. Our findings point to the need to better understand the role of grasslands and their soil P status and their importance for global food security.
草原提供草料，以满足对反刍动物肉类和奶类日益增长的需求。草原土壤养分通过这些畜产品的产出以及源自草原并施用于农田的动物粪便而被移除。这导致土壤肥力下降，因为全球大多数草原都不施用矿物肥料。我们在此表明，相对于2005年，2050年全球草原的磷（P）投入（矿物和有机）必须增加四倍多，才能在维持土壤磷状况的同时，实现预期的牧草产量（用于奶类和肉类）增长80%。结合对农田的需求，我们估计到2050年矿物磷肥的使用量必须翻倍，以维持未来的作物和草原生产。我们的研究结果表明，有必要更好地了解草原的作用及其土壤磷状况，以及它们对全球粮食安全的重要性。
Zotero 插件
