植物营养与肥料学报2011，Vol.17Issue(5)：1179-1187,9.
旱地豆科绿肥腐解及养分释放动态研究
Nutrient releases of leguminous green manures in rainfed lands
摘要
Abstract
In order to investigate the nutrient decayed and released rules, the nylon mesh bag method was used to monitor the nutrient releases from the manures of Huai bean, soybean and mungbean to soil in 287 days. The results show that all these green manures have an initial rapid decaying and then a slow decaying, and peak in the first month. During the stable phase, Huai bean has higher residual ratio than those of soybean and mungbean. The releases of different nutrients in green manures are varied. Nitrogen, phosphorus and potassium are released rapidly in the initial 21 d, of which the most complete release is potassium. After 287 d, the residual ratio of K is 3.2% -5.9%. Calcium in green manures has the highest residual ratio and has no significant change during the decom- position, and the residual ratio of Ca is 74. 8%-89.8% after 287 d. After 28 -days fast release, the residual ratio of Mg drops to approximate 30%. The residual ratio of copper undulates. There is significant release of iron within the first 21 d, and follows by a long slow release period. The residual ratio of zinc declines in the first 49 d, remains steady from 49 d to 175 d, and decreases dramatically after 175 d. The residual ratio of manganese shows a downward trend during the decaying period and reduces to 67.3%-74. 1% after 287 d, which is just less than that of calcium. Differences of nutrient release status of three green manures depend on nutrients. The residual ratios of nitrogen, calcium, iron, copper and zinc vary among three green manures while no significant differences of the residual ratios of potassium and magnesium are found among them. Mungbean has the lowest residual ratios of all nutrients except C, N, Cu and Zn, while soybean has the highest residual ratios of all nutrients except C, N, Cu and Fe.关键词
豆科绿肥/养分释放/旱地Key words
leguminous green manure/nutrient release/dry land分类
农业科技引用本文复制引用
赵娜,赵护兵,鱼昌为,曹群虎,李敏,曹卫东,高亚军..旱地豆科绿肥腐解及养分释放动态研究[J].植物营养与肥料学报,2011,17(5):1179-1187,9.基金项目
公益性行业（农业）科研专项 （）
教育部“新世纪优秀人才支持计划”项目 （）
西北农林科技大学2007“创新团队建设计划”项目资助. （）
