自 2 0世纪 80年代以来 ,为了适应河套地区一熟有余、两熟不足的自然条件 ,广大科技工作者积极总结和推广了以小麦为主的立体套作技术 ,为农民的增产增收做出了巨大贡献。可是随着市场经济的发展 ,一些套田的经济效益显得不高 ,尤其是粮粮套种 ,其投入成本高 ,劳动强度大 ,产品 Since the 1980s, in order to adapt to the natural conditions of overriding and under-ripening in Hetao, the majority of scientists and technologists have actively summed up and popularized the three-dimensional intercropping technique based on wheat, which has made it possible for farmers to increase production and increase incomes huge contribution. However, with the development of market economy, the economic benefits of some sets of fields are not high, especially for grain intercropping. The cost of inputs, labor intensity, and product