地膜覆盖和底墒灌溉对春小麦产量形成的影响

Effects of plastic film mulching and pre-sowing irrigation on yield formation of spring wheat

大田试验研究了地膜覆盖和底墒灌溉对春小麦产量形成的影响.地膜覆盖利于作物前期生长和水分利用,但不利于后期干物质积累和产量的形成.底墒灌溉对春小麦干物质积累和水分利用均有不利影响.对照 CK 、覆膜 M 、底墒灌溉 W 和覆膜+底墒灌溉 MW 4个处理产量分别为2554.0、2750.1、2424.3、3123.1kg·hm-2,补灌底墒与地膜覆盖具有协同促进作用.

Field experiments were carried out to study effects of plastic film mulching and presowing irrigation on yield formation of spring wheat.The promotion of soil temperature and soil water content under plastic film mulch is favorable to development and water use of spring wheat in earlier stage,while harmful to dry matter accumulation and yield formation in later period,while presowing irrigation has a unfavorable effect on dry matter accumulation and water use.Yields of spring wheat under control without mulching (CK),mulching (M),presowing irrigation (W),and mulching with presowing irrigation (WM) are 2 554.0?2 750.1?2 424.3?3 123.1 kg·hm-2 respectively,mulching works in coordination with presowing irrigation on yield of spring wheat.