论文部分内容阅读
一、早打顶技术的含义及依据麦套短季棉早打顶技术的特点,一方面是打顶时棉花个体发育阶段较春棉早,即生育期提前;另一方面,短季棉打顶开始时间比春棉早,延续时间比春棉短。一熟春棉打顶时已进入盛花期,单株长成果枝15～16个,中下部已成铃;而短季棉打顶时尚处于盛蕾期,单株仅有果枝7～8个,下部很少成铃。在时间上,一般一熟春棉于7月25日开始打顶,短季棉则要求7月20日结束打顶,此一熟春棉打顶提前一周左右。
First, the meaning of early topping technology and based on the characteristics of cotton short cotton quilts early topping technology, on the one hand is topping cotton individual development stage earlier than spring cotton, that is, early growth period; the other hand, the short-term cotton Top start earlier than spring cotton, spring cotton shorter duration. A ripe spring topping has entered the flowering period, long branches 15 to 16, the middle and lower part has become a bell; and short-season cotton top fashion Shenglei stage, fruiting branches per plant only 7 to 8, The lower part rarely rings. In terms of time, a familiar spring cotton begins to be topped on July 25, and short season cotton ends on July 20 topping. The cooked spring cotton top is about one week ahead of schedule.