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试验表明，９月３０日覆膜播种与常规９月１０日播种油菜各性状差异不显著。覆膜播种日期最晚可在１０月１０日，过晚播种，不利越冬。两种覆盖方式中，膜侧比膜内的效果好。
The results showed that there was no significant difference in the traits of seeding on September 30 and on the seeding on September 10. Film sowing date the latest in October 10, too late planting, adverse winter. Two kinds of coverage, the film side than the membrane effect.