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0引言近年来,甘肃省大面积推广全膜双垄沟播技术,该技术集成膜面集雨覆盖、抑蒸垄沟种植技术于一体。与传统的地膜栽培技术相比,该技术在覆盖方式上由半膜覆盖变为全膜覆盖;在播种方式上由平铺穴播变为垄沟种植,最大限度保蓄土壤水分,将地面无效蒸发降到最小程度,特别是将100 mm以下的降雨有效拦截,使其就地渗入作物的根部;在覆膜时间上由播种时覆膜变为秋覆膜或顶凌覆膜,加强了光合作用,提高了单位产量,有效抑制了杂草生长,减轻了雨水
0 Introduction In recent years, Gansu Province, a large area to promote full film double ridge furrow sowing technology, the technology integrates film covered rain cover, suppression of steaming furrow planting technology in one. Compared with the traditional mulching cultivation techniques, the technique changes from semi-film to full film coverage in the covering manner; from tiling to furrow planting in the sowing mode, preserving soil moisture to the maximum and invalidating the ground to evaporate To the minimum extent, in particular, the rainfall below 100 mm is effectively intercepted and in-situ infiltrated into the root of the crop. In the film-mulching time, the mulching film is changed into the autumn mulching film or the top mulching film to enhance photosynthesis, Increased unit output, effectively inhibited the growth of weeds, reducing the rain