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宁夏南部山区年积温有限，无霜期120－167天，一年种植一季作物光温资源有余，种植两季光温不足，严重制约着粮食产量的提高。从1992年开始我们经5年时间进行冬小麦套种烤烟栽培技术的开发性试验研究和示范种植，探索出高产高效粮经型栽培模式。实行套种后使作物生长季节得到充
The annual accumulation of temperature in southern Ningxia is limited, and the frost-free period is 120-167 days. There is more than one crop of light and temperature in planting one season in a year, and the shortage of light and temperature in planting two seasons severely restricts the increase of grain yield. Since 1992, we have carried out developmental experiments and demonstration planting of winter wheat intercropping flue-cured tobacco cultivation technology in five years, and explored the mode of cultivation and cultivation of high-yield and high-efficiency grain-type cultivation. After the implementation of intercropping the crop growth season to be filled