目前,人们大都认为棉花叶枝害处大。说它长得快、耗肥多、结桃少,影响棉花生长发育,使蕾铃脱落增多。主张格杀勿论。其实,叶枝也非一无是处,也无须立斩不救。大家知道,棉花生长发育,一方面靠根部吸收土壤中的水份、养分;一方面靠叶面的光合作用制造有机养料。此外,叶片还有呼吸、蒸腾和吸收的生理功能。可见,叶面积的大小,不仅与棉花产量高低有着直接的关系,是反映棉花群体营养生长状况的一个重要标志,而且枝叶的生长状况也同时影响着地下根系的发展,是地下部分生长状况的反映。俗话说“根深叶茂”,指的就是这种根系和枝叶间两者相辅相成的关系。棉花苗期,叶面增长速度很慢,而这一阶段,叶面积的状况如何,对棉株一生影响深远。棉花一般又是先长叶枝后长果枝。所以,这个阶段叶枝更是构成蕾铃期棉株叶面系数的重 At present, most people think that cotton leaf damage is great. Said it grows fast, consume more fat, fewer peaches, affecting the growth and development of cotton, so that increased loss of bud bell. Advocates to kill no matter. In fact, Yezhizhong non-useless, there is no need to stand up to it. We all know that the growth and development of cotton, on the one hand by the roots to absorb soil moisture, nutrients; on the one hand by foliage photosynthesis of organic nutrients. In addition, the leaves have the physiological functions of breathing, transpiration and absorption. It can be seen that the size of leaf area is not only directly related to the cotton yield, but also an important indicator of the vegetative growth of the cotton population. Moreover, the growth of the foliage also affects the development of the underground root system and is a reflection of the growth of the underground part . As the saying goes, “root deep leaves,” refers to the relationship between the root system and the branches and leaves complement each other. Cotton seedling, foliar growth rate is very slow, but at this stage, the status of leaf area, the impact of far-reaching impact on cotton plant life. Cotton in general is the first branch of the long branch of fruit branches. Therefore, this stage is the formation of leaf bolls cotton boll leaf coefficient of weight