Nitrogen fertilization, soil nitrate accumulation, and policy recommendations in several agricultural regions of China
Nitrogen fertilization, soil nitrate accumulation, and policy recommendations in several agricultural regions of China
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DOI：
10.1579/0044-7447-33.6.300
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发表时间：
2004-08-01
期刊：
影响因子：
6.5
通讯作者：
Roelcke, M
中科院分区：
文献类型：
--
作者：
Ju, XT;Liu, XJ;Roelcke, M
过多的氮肥和作物氮素利用率的下降，导致中国农业面源污染急剧增加。根据经济发展阶段的不同，全国各地的氮肥施肥率在不同地区和不同作物之间差异很大。例如，东部地区和经济作物的氮肥施用量远远高于该国西部地区和谷类作物。此外，富裕地区的氮肥使用率高于中科院的建议。为了实现环境保护和作物高产，中国必须制定相关农业政策，鼓励经济发达地区的农民降低氮肥施用量，同时发布针对小规模耕作和扩大经济作物种植的常规施肥建议。
Excessive nitrogen (N) fertilization and decreasing N recovery rates by crops have caused dramatic increases in non-point source pollution from agriculture in China. The rate of N fertilization across the country varies widely among regions and crops, depending on the stage of economic development. For example, N application rates in the eastern regions and on cash crops are far higher than in western regions of the country and on cereal crops. Moreover, N application rates in wealthier regions are higher than recommended by the Chinese Academy of Sciences. To successfully achieve environmental protection as well as high crop yields, China must formulate relevant agricultural policies to encourage farmers in economically developed areas to reduce their N fertilization rate while also issuing conventional fertilization recommendations for small-scale farming systems and the expanding cultivation of cash crops.