期刊
GLOBAL FOOD SECURITY-AGRICULTURE POLICY ECONOMICS AND ENVIRONMENT
卷 3, 期 1, 页码 16-21出版社
ELSEVIER
DOI: 10.1016/j.gfs.2013.11.002
关键词
Nitrogen; Phosphorus; Reactive flows; Phosphorus reserves; Food security; Agrifood system
资金
- Green Growth Program of Tekes-the Finnish Funding Agency for Technology and Innovation [2650/31/2011]
Recent research suggests that anthropogenic nutrient flows may have transgressed the regulatory capacity of the earth. Agrifood systems account for most of the flows, and the food supply is limited more by reducing the excessive flows than by phosphorus (P) reserves or population growth. The food supply is limited primarily by the P flow tolerated by freshwater ecosystems and next by the needed reduction in the conversion of nitrogen (N) to reactive form in fertilizer manufacture, legume cultivation and fossil fuel combustion. The required reduction in P and N flows would reduce the food supply to 250 and 710 kcal capita d(-1), respectively, in the current agrifood systems. Dietary changes, waste prevention and nutrient recycling are parts of the necessary transformation. (C) 2013 The Authors. Published by Elsevier B.V. Open access under CC BY liecIrso
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