本所去年雨季以后,于8月29日,在整过枝并已去掉中下部老叶的棉田里,进行了剪空枝试验。处理分为:(1)剪掉所有空果枝;(2)适当去掉二、三个空枝并剪去空顶;(3)不去空枝亦不削顶(对照)。棉花品种为密字棉103,密度每亩5,354株,小区面积480平方 After the rainy season last year, on August 29, it conducted a test of cutting empty branches in the entire cotton field where the middle part and the lower part of the old leaves have been removed. The treatment is divided into: (1) cut off all empty fruiting branches; (2) appropriate removal of two or three empty branches and cut to the top of the empty; (3) not empty branches nor shaved (control). Cotton varieties are dense cotton 103, with a density of 5,354 trees per mu and a plot area of ​​480 square meters