宁夏南部山区年积温有限,无霜期120～167ｄ,一年种植一季作物光温资源有余,种植两季光温不足。从1992年开始,经5年时间进行了冬小麦套种烤烟栽培技术的试验和示范种植,探索出高产高效粮经型栽培模式。实行套种后降雨利用率提高30%～40%,光能利用率提高8%～15%,有效积温利... The annual accumulated temperature in the mountainous area of ​​southern Ningxia is limited, and the frost-free period is 120-167 days. One year’s planting of crop light and heat resources in one season is more than that in the other two years. From 1992 onwards, after five years of winter wheat intercropping flue-cured tobacco cultivation techniques and demonstration planting, to explore high-yielding and efficient grain-type cultivation mode. After the intercropping, the rainfall utilization rate will increase by 30% ~ 40%, and the light energy utilization rate will increase by 8% ~ 15%.