摘要
[目的]研究不同小麦品种适宜的追肥时期是否存在差异。[方法]选用3个具有代表性的小麦品种（济麦22、临麦4号、LN66），研究氮肥不同追肥时期对小麦分蘖动态及产量构成要素的影响。[结果]适时将小麦的追肥时期后移，可以提高小麦产量。不同小麦品种适宜的追肥时期存在差异。对于大多数小麦品种（如济麦22和临麦4号），氮肥的适宜追肥时期为拔节期；对于生长后期有早衰迹象的小麦品种（如LN66），开花期追肥较为适宜。[结论]在小麦生产过程中应根据小麦的品种特性适期追肥。
Abstract
Objective] The aim was to study whether there are differences in topdressing period of different wheat varieties.[ Method] Selec-ting 3 representative wheat varieties(Jimai 22, Linmai 4, LN66), effects of different N topdressing period on wheat tiller dynamics and yield components were studied.[ Result] Appropriately postponing N top-dressing time could improve the yield of wheat.Different types of wheat varieties appropriate N top-dressing time were different.To most of wheat varieties(such as Jimai 22 and Linmai 4), the suitable N top-dress-ing time was the jointing stage, but to the senescence of wheat varieties(such as LN66), the suitable N topdressing time is the flowering stage. [ Conclusion] We must choose the appropriate nitrogen top-dressing time according to the characteristics of wheat varieties.
基金项目
国家小麦产业技术体系支持项目(CARS－3－2－19)
万方数据