现代农业研究2025，Vol.31Issue(3)：13-17,5.
不同施氮量和施氮时期对玉米氮素利用效率的影响
Effects of Different Nitrogen Application Stages and Periods of Nitrogen Application on Nitrogen use Efficiency in Maize
摘要
Abstract
In order to investigate the appropriate nitrogen fertilizer management mode for summer maize in the yellow river irrigation Area of Henan Province,in this study,field experiments were conducted in the main summer maize producing areas of Henan Province,with three levels of nitrogen application and three groups of nitrogen chasing periods,namely,120 kg/hm2(N120),220 kg/hm2(N220),320 kg/hm2(N320),as well as at the pulling stage(P1),the trumpet stage(P2),and flowering stage(P3),to study the effects of N application and N application period on water and N transport in summer maize.The results showed that the changes in soil water content were basically the same in all the experimental plots under different N application levels and N application periods,and the application of N fertilizer could promote the water absorption capacity of the root system and thus lead to changes in the average water content of each soil layer.Different nitrogen application periods will affect the time of the nitrate nitrogen peak,and increasing nitrogen fertilizer application will increase the nitrate nitrogen content in the soil.Nitrogen fertilizer recovery rate and nitrogen fertilizer utilization efficiency decreased with the increase of nitrogen application at a certain period of nitrogen application,and the difference of nitrogen fertilizer recovery rate was not big between 120 kg/hm2 and 220 kg/hm2,with an average difference of only 2.94%.关键词
夏玉米/氮肥管理模式/氮素指标Key words
summer maize/nitrogen fertilizer management mode/nitrogen indexes分类
农业科技引用本文复制引用
杨明伟..不同施氮量和施氮时期对玉米氮素利用效率的影响[J].现代农业研究,2025,31(3):13-17,5.基金项目
河南省高等学校重点科研项目"河南省沿黄地区水-能源-粮食耦合系统协调性研究及应用"(项目编号:22A570004) （项目编号:22A570004）
