不同种植模式对棉花脱叶的影响

Effects of Different Planting Patterns on Cotton Defoliation

为明确脱叶剂对不同种植模式棉花的脱叶效果,本实验选取一膜三行、一膜四行和一膜六行三种种植模式的棉田喷施棉花脱叶剂,于药后20d观察了棉花脱叶吐絮情况。结果表明,棉花种植模式为一膜三行棉花吐絮率高,青叶数和叶片挂枝数少,分别为91.03%、1.97片/株、1.6片/株。种植模式为一膜四行棉花吐絮率不高,并且青叶数和叶片挂枝数很高。种植模式为一膜六行棉花吐絮率高,青叶数少,但叶片挂枝数很高。因此推荐种植模式为一膜三行棉花更适合飞防喷施脱叶剂。

In order to clarify the effect of different planting patterns on cotton defoliation,experiment was carried out with random block.The differences of cotton defoliation and bolling were studied 20th day after application in three planting patterns:one film three rows,one film four rows,and one film six rows.The results showed that the rate of boll open was highest,and the number of green leaves and leaves hanging branches were smallest in one film three rows pattern;which were 91.03%,1.97 and 1.6 respectively.While in one film four rows pattern,the rate of boll opening is high,but the number of hanging branches is too large.Therefore,it is recommended that the planting mode of one film three rows of cotton is more suitable for spraying defoliant.