摘要
旱作冬小麦施氮与地膜栽培水肥管理试验结果表明,小麦施用氮肥在小麦生育前期连续干旱年中仍有显著增产效果,但小麦地膜栽培未表现良好的增产作用。施用氮肥有利于0～100cm土层土壤水分的保持和改善,明显提高水分生产效率,增加小麦的N素吸收,并促进小麦对P素和K素的吸收总量。地膜栽培在小麦生育前期具有较好的保墒作用,膜际与膜下栽培土壤剖面水分无明显差异,表层土壤湿度的日变化观测表明地膜具有明显的提水保墒作用。
The experiments of nitrogen-application and water-fertilizer under mulch cultivation of wheat in arid highland in Changwu, Shaanxi show that the effect of applying nitrogen on yield is obvious, but that of mulch cultivation is not good in special drought year with continual dry in earlier stage. The fertilization is advantageous to improve soil water conditions in 0- 100cm of soil horizon and improve water use efficiency. The mulch cultivation plays a role in keeping soil water in earlier stage of wheat growth,and the differences of plantation in mulches and plantation under mulches are not great in soil profile's moisture. The mulch cultivation can increase soil moisture in upper layer and in plow layer. It is obvious to increase N absorption and improve P and K absorption with nitrogen applying.
出处
《中国生态农业学报》
CAS
CSCD
2002年第4期44-47,共4页
Chinese Journal of Eco-Agriculture
基金
国际原子能机构(IAEA)协作项目(CPR9986)资助
关键词
旱作冬小麦
氮肥
地膜栽培
水肥效应
肥水关系
施肥
Nitrogen fertilizer,Plastic film mulching,Relation of fertilizer and water,Dry land farming
