早定苗是棉花早管早发苗的一项重要措施。过去朝阳地区都是2～3片真叶时才定苗,小苗互相拥挤,争肥争光,影响壮苗早发。去年,推广了1片真叶,一次定苗的措施,效果很好。开始推广时,有的人有四怕(怕旱死、虫子吃了、雹子打没了、风抽死),不敢早定苗。为此,我们和群众共同挖掘根系观察,1片真叶的苗,根长已有16厘米,侧根有46根,结果打消了顾虑。实践证明,1片真叶定苗,不但没有被风抽死,而且实现了壮苗早发,开絮早。10月19日调查,已全部开到顶,比晚定苗的早开半个月。增加单位面积棵数,是朝阳地区棉花增产的重要途径。过去 Early set of seedlings is an early measure of cotton early seedlings an important measure. In the past Chaoyang area are 2 ~ 3 really leaves when Dingmiao, seedlings crowded each other, fight fat glory, affecting seedlings early hair. Last year, the promotion of a true leaf, a Dingmiao measures, the effect is very good. At the beginning of promotion, some people have four fear (fear of drought, insects eat, hail fights, wind pumping death), not early Dingmiao. To this end, we together with the masses to tap the root of observation, a true leaf of the seedlings, root length has been 16 cm, 46 lateral root, the result dispel concerns. Practice has proved that a real leaf Dingmiao, not only was not the wind pumping death, but also to achieve strong seedlings early hair, Xu Xu early. October 19 survey, has been fully open to the top, late than late seedlings open half a month. Increasing the number of trees per unit area is an important way for cotton production in Chaoyang. past