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玉米连作4年,土壤有机质含量有不显著的增加,连作地块病虫害发生逐年严重,并由此影响产量,综合分析玉米连作4年的经济效益明显高于玉米-大豆-高梁-玉米4年轮作形式,故在生产上实行玉米多年(4年)连作是可行的。
The continuous cropping of maize for 4 years did not significantly increase the organic matter content of the soil. The pest occurrence in continuous cropping plots was serious year by year, and the yield was affected. The comprehensive analysis of the economic benefits of 4 years continuous cropping of corn was significantly higher than that of 4-year crop rotation of corn-soybean-sorghum- Form, so in the production of corn for many years (4 years) with the crop is feasible.