植物营养与肥料学报2012，Vol.18Issue(1)：35-41,7.
不同肥力土壤下施氮与玉米秸秆还田对冬小麦氮素吸收利用的影响
Effect of maize straw applied with N fertilizer on nitrogen adsorption of winter wheat under different soil fertility
摘要
Abstract
By adopting the doubly-labeled method of 15 N-labeled urea and 15N-labeled maize straw, pot experiments were carried out to study the effect of maize straw direct return on winter wheat＇ s N accumulation, nitrogen distri- bution and nitrogen fertilizer recovery in 2 soils with different fertility. These results indicate that under the condi- tion of same N fertilizer application amount, the nitrogen accumulation of winter wheat is decreased with the return of maize straw compared with non maize straw return, while the nitrogen harvest index is increased with the return of maize straw since nitrogen accumulation is decreased more significantly in winter wheat＇ s stalk than that in its kernel. The nitrogen content of winter wheat seed cultivated in the high fertility soil is higher than that in the low fertility soil, while the nitrogen content of winter wheat straw cultivated in the high fertility soil is lower than that in the low fertility soil. The nitrogen recovery rates are declined by 9.6%-15.7% and nitrogen residual rates are in- creased by 12.2%-16.4% under the nitrogen fertilization applied with maize straw return. About 22.8%-33.1% nitrogen accumulation of winter wheat and 7%-10% nitrogen accumulation of winter wheat seed are from the re- turned maize straw when the N-fertilizer application rates are N 150 and 300 kg/ha. Under the condition of the same N fertilizer application rate and the same soil fertility, the impact of N fertilizer applied with maize straw on the seed yield of winter wheat is not significant, and the effect of soil fertility on the use efficiency of maize strawnitrogen is larger than that of the nitrogen fertilizer. This result should be proved by further field experiment.关键词
玉米秸秆还田/冬小麦/氮素累积量/氮素分配/氮肥回收率Key words
maize straw return/winter wheat/nitrogen accumulation/nitrogen distribution/recovery of nitrogen fertilizer分类
农业科技引用本文复制引用
单鹤翔,卢昌艾,张金涛,王金洲,徐明岗..不同肥力土壤下施氮与玉米秸秆还田对冬小麦氮素吸收利用的影响[J].植物营养与肥料学报,2012,18(1):35-41,7.基金项目
国家重点基础研究发展讣划资助课题(2011CB10501,2007CB109308)资助. （2011CB10501,2007CB109308）
