关中原上灌区回茬玉米常因抽雄期伏旱缺水,用水量集中,往往由于灌水不及时,造成减产甚至拔苗无收。为解决这一问题,1973～75年在成阳地区农科所和兴平县陈中大队(以下简称成阳、兴平点)进行了改回茬晚玉米为麦地套种早玉米试验。结果表明,这种套种方式,不仅小麦产量高于回茬接近正茬,而且玉米高产稳 Guanzhong irrigation area on the back stubble corn often due to drought and water shortage, water concentration, often due to irrigation is not timely, resulting in reduced production or even plum shoots confiscated. To solve this problem, in 1973 ~ 75 years in Chengyang Agricultural Science Institute and Xingping County Chen unit (hereinafter referred to Chengyang, Xingping point) to change back into late evening corn maize interplanting early corn experiments. The results showed that this method of intercropping, not only the yield of wheat is higher than that of stubble, but also the yield of corn is high