期刊
JOURNAL OF ENVIRONMENTAL QUALITY
卷 40, 期 4, 页码 1081-1089出版社
AMER SOC AGRONOMY
DOI: 10.2134/jeq2010.0444
关键词
-
资金
- National Science Foundation of China [30890130, 30821003]
- Chinese Universities Scientific Fund [2010JS113]
Efficient use of phosphorus (P) for producing food, preventing water pollution, and managing a dwindling rock P reserve are major challenges for China. We analyzed P stocks and flows in the Chinese food chain to identify where P use efficiency can be improved, where P leaks to the environment, and the research, technologies, and policies needed to improve P use. We found a high degree of inefficiency; of 6652 Gg P entering the food chain, only 1102 Gg P (18%) exit as food for humans. The greatest inefficiencies were a large build-up of soil P (3670 Gg P yr(-1); 52% of P inputs) and high P losses to the environment from animal production (1582 Gg P yr(-1); 60% of excreted P). Improving P use in China must focus on national-scale nutrient management strategies, better animal nutrition, and adoption of technologies and policies to reduce P discharges from the animal sector and recycle P as manures in agriculture.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据