3A是我省高粱主干品种的母本,每年制种需要量很大。由于农村实行家庭承包责任制,加上繁殖3A的隔离条件要求严格,给繁殖3A的工作带来困难。每年为解决隔离区要做大量的工作,花不少隔离补偿费。能不能利用地膜覆盖提前播种解决隔离呢?1975,1976两年我们在汾阳县朝阳坡、罗城进行试验,收到比较满意的效果。 3A is the female parent of sorghum varieties in our province, a large amount of seed production every year. Due to the rural household contract responsibility system, coupled with the strict requirements of breeding 3A isolation, breeding 3A work to bring difficulties. To solve a large number of isolated areas to do a lot of work, spend a lot of isolation compensation fees. Can we use pre-mulching to solve the problem of sequestration? In 1975 and 1976, we conducted tests in Chaoyangpo and Luocheng in Fenyang County, receiving satisfactory results.