调整旱地粮食作物种植结构,是用地养地,培肥地力,提高单产,均衡增产的一条新途径.蚕豆(尕大豆)——小麦——小麦的轮作方式,与豌豆——小麦——小麦的轮作方式相比,产量差异不显著,与绿肥压青——小麦——小麦、绿肥收籽——小麦——小麦两种轮作方式比较,产量差异均达到显著水平.在试验的同时,还进行了大面积示范验证,有明显的增产效果,为大面积推广合理的轮作方式提供了科学依据. Adjusting the planting structure of dry land grain crops is a new way to raise land and fertilize land, increase yield and balance production. The rotation mode of broad bean (wheat-soybean) - wheat-wheat is the same as that of pea-wheat-wheat Compared with the rotation mode, the yield difference was not significant, and the differences were all significant when compared with the green manure-green-wheat-green manure-wheat-wheat rotation mode. Large-scale model validation, there is a clear yield-increasing effect, for a large area to promote a reasonable mode of rotation provides a scientific basis.