以沈单16玉米为试验材料,采用全膜覆盖下3种不同双垄行距、3种不同株距二因素随机区组设计,进行渭北旱塬玉米全膜双垄沟播最佳密度的筛选研究。试验结果表明:玉米全膜双垄沟播的密度不同,导致其生育期发生变化,种植密度越大,生育期越长,反之则越短;通过垄宽、株距与产量的二元回归分析表明,垄宽为40cm+70cm和株距31.76cm是秦安等渭北旱塬地区玉米双垄沟播的最佳密度。 Taking Shendan 16 maize as test material, three different double ridge spacing and three different spacing two factors randomized block design were used to screen the optimum density of double mantle furrow in maize in Weibei dryland. The results showed that the density of sowing of double furrows in maize was different, leading to the change of its growing period, the higher the planting density and the longer the growing period, and vice versa. By the dual regression analysis of ridge width, plant spacing and yield, The width of 40cm + 70cm and the spacing of 31.76cm were the best density of corn double ridge furrow planting in Qinan and other Weibei dryland areas.