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为了明确棉花整枝措施的综合效应,以及各个单项整枝措施的效应,我们从1980-1981年连续两年进行了较系统的试验.1980年在全省12处统一采用正交设计进行试验;1981年又在全省不同自然区18个地点对中、上等肥力的棉田进行了棉花打顶和打顶时
In order to clarify the combined effect of cotton pruning measures and the effect of individual pruning measures, we conducted a systematic experiment for two consecutive years from 1980 to 1981. In 1980, we used 12 orthogonal design tests in the province. Also in the province of different natural areas in 18 locations on the middle and upper fertile cotton fields were cotton topping and topping