中国农业科学2012，Vol.45Issue(15)：3093-3099,7.
基于高丰度15N华北平原冬小麦肥料氮的去向研究
Fate of Fertilizer Nitrogen Applied to Winter Wheat in North China Plain Based on High Abundance of 15N
摘要
Abstract
[Objective] The purpose of this paper was to estimate the fate of fertilizer N applied to winter wheat under optimum nitrogen (N), phosphorus (P) and potassium (K) rates in north China plain. [Method] A field micro-plot experiment was adopted and high abundance of 15N was applied to wheat in this study. After harvest of wheat, the fate of 15N was measured. [Result] The result showed that about 26.6%-33.6% of the N taken up by winter wheat was derived from the applied fertilizer N, and 66.4%-73.4% of that was derived from the soil. The plant recoveries of N were in the range of 22.11%-32.36%, and soil residual N from applied N fertilizer were ranged in 29.6%-56.3%, of which 60.3%-76.5% centralized in 0-40 cm soil layer, and the amount of fertilizer N residue in soil profile decreased rapidly with the increase of soil depth. [Conclusion] More than 66% of nitrogen absorbed by winter wheat was derived from soil, the nitrogen utilization rate was 28.2% in the first season on average, about 40% of applied fertilizer N were remained in the soil, which might be a necessary supplement for the soil N pool.关键词
冬小麦/氮肥去向/15N/氮肥利用率Key words
winter wheat/ fate of N fertilizer/ 15N/ N use efficiency引用本文复制引用
左红娟,白由路,卢艳丽,王磊,王贺,王志勇..基于高丰度15N华北平原冬小麦肥料氮的去向研究[J].中国农业科学,2012,45(15):3093-3099,7.基金项目
国家科技支撑计划(2008BADA4B03) （2008BADA4B03）
