The total, average and current annual increment of breast diameter of stand average stem are best.
林分平均木胸径总、平均和连年生长量最好。
While standard degree of closing of the plantation reached 0.85, current annual increment of DBH started to decline, and the intensity of thinning should not exceed 30%.
林分标准郁闭度达0.85以上时，胸径连年生长量已下降，株数间伐强度以不超过30%为宜。
While standard degree of closing of the plantation reached 0.85, current annual increment of DBH started to decline, and the intensity of thinning should not exceed 30%.
林分标准郁闭度达0.85以上时，胸径连年生长量已下降，株数间伐强度以不超过30%为宜。
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