土壤2012，Vol.44Issue(3)：395-401,7.
秸秆还田与施氮量耦合对冬小麦产量和养分吸收的影响
Effects of Straw-return Coupled with Nitrogen Fertilizer Application on Winter Wheat Yield and Nutrient Absorption
摘要
Abstract
The objective of this research was to discover the formation mechanism of wheat production through study the impact of straw-return and fertilizer-N application on grain yield, yield components and nutrient absorption of winter wheat, and soil nutrient availability in Huang-huai-hai plain's cropland. The results showed that under the same fertilization conditions, the way of straw-return had the trend of increasing the production of winter wheat, but the effect was only significant in the fertilizer-N application of 150 and 200 kg/hm2; Generally, straw-return can raise the production by the rate of 6.34%-12.17%. It was mainly because straw-return increased 1000-kemel weight; and it may be also related to the reason that straw-return increased the aboveground nitrogen absorption of winter wheat in the time of jointing-heading. Meanwhile, straw-return with nitrogen fertilizer increased the contents of soil alkali-hydro nitrogen and rapidly-available potassium, which provided fertility foundation for crop nutrient uptake. Compared with no nitrogen fertilizer, rising grain yield by application of fertilizer mainly was due to the increase of panicles per unit area, but grain productions under the different applications of nitrogen fertilizer had no significant difference, which indicated that the local conventional application of nitrogen fertilizer was in part a potential way of saving fertilizer.关键词
秸秆还田/施氮量/产量/氮素吸收/土壤养分Key words
Straw-return. Nitrogen fertilizer application, Yield, N uptake, Soil nutrient分类
农业科技引用本文复制引用
苗峰,赵炳梓,陈金林..秸秆还田与施氮量耦合对冬小麦产量和养分吸收的影响[J].土壤,2012,44(3):395-401,7.基金项目
国家重点基础研究发展计划(973计划)项目 (2011CB100506)和中国科学院知识创新工程重大项目(KSCX2-EW-N-08,ISSASIP1118)资助. （973计划）
