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鄂西二高山地区,当前旱地的种植方式主要是小麦(马铃薯)套种玉米,这种套种方式,近20年来对提高粮食单产、增加粮食总产,发挥了重大作用。但随着生产的发展,科技水平的提高,新品种的出现,这种套种方式,对进一步提高粮食单产,日益显露出矛盾,主要表现在套种条件下,前作小麦(马铃薯)在播种时,要给后作玉米留下预留行,前作小麦(马铃薯)对土地的利用率很低,一般不足30％,极大地影响了前作的产量;同时,后作玉米,也由于受前作荫蔽,往往造成缺苗、倒
In the two alpine areas of western Hubei Province, the current dry land is mainly planted with wheat (potato) intercropping corn. This intercropping method has played an important role in raising grain yield and increasing grain output in the past 20 years. However, with the development of production, the improvement of science and technology, and the emergence of new varieties, this intercropping method is increasingly contradicting the further improvement of grain yield. This is mainly reflected in the intercropping of wheat (potato) Leaving reserved corn for the latter crop. The utilization rate of wheat (potato) before the land was very low, generally less than 30%, which greatly affected the yield of the previous crop. At the same time, the latter crop of corn also often resulted in shading Lack of seedlings, down