中国农业科学2012，Vol.45Issue(11)：2209-2216,8.DOI:10.3864/j.issn.0578-1752.2012.11.009
潮褐土冬小麦-夏玉米轮作体系氮肥后效及去向研究
Fate and Residual Effect of Fertilizer Nitrogen Under Winter Wheat-Summer Maize Rotation in North China Plain in Meadow Cinnamon Soils
摘要
Abstract
The fete and residual effect of fertilizer nitrogen under winter wheat-summer maize rotation were studied using filed 15N microplot in north China. [Method] In the field 15N-micropolt experiments, nitrogen applied at 0,75, 150, 225,300 kgN·hm-2(N0, N75, N150, N225, N300) and two wheat varieties were used under winter wheat-summer maize rotation in North China Plain. [ Result] The results showed that all the late three crops could utilize the 15N-labeled residual from the first winter wheat. Along with !5N-labeled fertilizer application rates increasing, the 15N was up-taken by the after three crops increased significantly, but following the increasing of crops for rotation, the absorption amounts and absorption rate decreased significantly. Overlying N utilization efficiency of four crops was significantly higher than the N utilization efficiency of the right winter wheat. The overlying N utilization efficiency in N75, N150, N225 and N300 treatments accounted for 53.8%, 58.7%, 58.6% and 55.8% when HN822 was the first crop and 60.0%, 61.3%, 60.9% and 55.2%, respectively, when KN9204 was the first crop. After the fourth summer maize harvest, the range of soil residue in profile was 22.3-96.2 kgN·hm-2, the ratio of soil residue was from 22.1% to 32.8%. The range of total loss was 9.3-55.3 kgN·hm-2, and the loss ratio was 8.9% to 18.6%. [Conclusion] Two rotation systems finished. There was residual l5N in 0-200 cm soil profile after two crops rotation. With the nitrogen fertilizer application rates increasing, the nitrate and residual 15N amount increased. With the increasing of crops growth, the moving trend of nitrate and residual 15N was downward in vertical direction.关键词
冬小麦/夏玉米/氮肥去向/氮肥后效/15NKey words
winter wheat/ summer maize/ fate of nitrogen/ N residual effect/ 15N引用本文复制引用
董娴娴,刘新宇,任翠莲,吉艳芝,巨晓棠,张丽娟..潮褐土冬小麦-夏玉米轮作体系氮肥后效及去向研究[J].中国农业科学,2012,45(11):2209-2216,8.基金项目
国家自然科学基金项目(30571110)、农业部公益性行业科研专项(201103003) （30571110）
