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试验在10年生松树人工林中进行,共分 4个小区,第一小区剪掉上部3个轮枝上的侧枝芽,第二小区只剪掉最上一轮枝的侧枝
The experiment was carried out in a 10-year-old pine plantation and was divided into 4 plots. The first plot cut off the lateral shoots on the upper 3 branches and the second plot cut only the branches on the uppermost branch