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种植绿肥作物,是用地养地的有效途径。但是,在人均土地面积不大的地区进行粮草轮作不易被人们接受。于是在作物生育期较长的辽南地区出现了绿肥复种油用向日葵的种植形式,既可养地,又可保证当年收益。但是不少人认为绿肥复种向日葵的茬口很差,对下茬作物产量影响很大,这种种植形式不可取。为了明确向日葵茬口的特点,我们从1981年开始,进行了(?)麻复种向日葵茬口特性的试验,取得的结果如下。
Planting green manure crops, land is an effective way to keep the land. However, it is not easy for people to accept that the rotation of crops in areas where per capita land area is not large. So long crop growth period in southern Liaoning appeared green manure oil sunflower planting forms, both to raise land, but also to ensure that the proceeds. However, many people think that green stubble sunflower crop stubble is poor, a great impact on the next crop yield, this form of cultivation is not desirable. In order to clarify the characteristics of sunflower stubble, we started in 1981, (?) Hemp seed sunflower stubble characteristics of the test, the results obtained are as follows.