排灌机械工程学报2017，Vol.35Issue(5)：440-447,8.DOI:10.3969/j.issn.1674-8530.16.0100
水氮耦合对冬小麦氮素吸收及产量的影响
Effects of water and nitrogen coupling on nitrogen absorption and yield of winter wheat
摘要
Abstract
Improving water and fertilizer use efficiencies is one of the fundamental ways to solve resources and environmental problems in the North China Plain.A series of long-term experiments were made in a typical specified field in the North China Plain,Fengqiu,Henan Province to clarify the influence of water and nitrogen fertilizer coupling on nitrogen absorption and utilization as well as grain yield of winter wheat.In the experiments,five nitrogen levels were used,at each level,there are three irrigation wet layers.The results show that the best nitrogen fertilizer amount was 235-250 kg/hm2,and the irrigation wet layer was 37-40 cm thick in Fengqiu,the yield and nitrogen utilization rate of winter wheat could be affected when a nitrogen fertilizer amount was more or less than the best one.The impacts of irrigation on the total nitrogen content in plant,nitrogen utilization rate and yield of winter wheat are closely related to characteristics of rainfall.The lack of rainfall in critical growth periods such as stem elongation and ear emergence stages can lead to a significant decrease in yield of winter wheat.An appropriate irrigation can improve the yield,however,too much irrigation cannot help to increase it further.Irrigation shows a little influence on plant nitrogen content in the case of sufficient precipitation.When rainfall is insufficient,increasing irrigation can hamper the nitrogen transfer from straw to grain.关键词
冬小麦/水氮耦合/氮素含量/氮肥累积量/产量Key words
winter wheat/coupling of water and nitrogen/nitrogen rates/nitrogen accumulationquality/crop yields分类
农业科技引用本文复制引用
秦姗姗,侯宗建,吴忠东,马东豪,黄平..水氮耦合对冬小麦氮素吸收及产量的影响[J].排灌机械工程学报,2017,35(5):440-447,8.基金项目
现代农业产业技术体系专项资金资助项目(CARS-03) （CARS-03）
山东省社会科学规划研究项目(13DJJJ15) （13DJJJ15）
国家自然科学基金资助项目(41402208) （41402208）
