中国生态农业学报2011，Vol.19Issue(1)：24-31,8.DOI:10.3724/SP.J.1011.2011.00024
太湖地区稻田不同轮作制度下的氮肥减量研究
Reduction of nitrogen fertilizer application under different crop rotation systems in paddy fields of Taihu Area
摘要
Abstract
In a paddy rice field experiment with different crop rotation systems and nitrogen application rates, surface water nitrogen content, nitrogen lose via runoff, soil fertility and rice yield were determined. Based on the experiment, chemical nitrogen fertilizer application during rice season in alfalfa-rice or rye-rice rotation systems can be reduced, and not in wheat-rice rotation system in Yixing, Jiangsu Province. Alfalfa-rice and rye-rice rotation systems enhanced soil nitrogen content, promoted rice nitrogen absorption and significantly improved rice yield. Because there was no nitrogen fertilization in winter, nitrogen loss via field water runoff into natural water bodies dropped during this period. The increase of organic fertilizer ratio under the same nitrogen application did also dropped total nitrogen in surface water. The green manure, especially alfalfa, was not only low cost but also effectively replaced chemical nitrogen fertilizers, which resulted in lowered cost of rice production. Replacing traditional wheat-rice with alfalfa-rice rotation system and reducing 120 kg · hm-2 of nitrogen application during rice season resulted in economic benefits and yield increase and environmental sustainability in Yixing, Jiangsu Province.关键词
轮作制度/太湖地区/稻田/氮肥减量/有机肥/氮径流损失分类
农业科技引用本文复制引用
乔俊,颜廷梅,薛峰,杨林章,卢萍..太湖地区稻田不同轮作制度下的氮肥减量研究[J].中国生态农业学报,2011,19(1):24-31,8.基金项目
国家重点基础研究发展计划(973计划)项目(2007CB109303)、国家科技支撑计划项目(2006BAD17B06)和农业部公益性行业项目(200903011)资助 （973计划）
