天全县毛岗子林区柳杉抚育间伐设计

Tending and Thinning Design of Cryptomeria fortunei in Maogangzi Forest Area of Tianquan County

天全县毛岗子林区的柳杉人工商品林,栽植时密度偏大,郁闭至今还未进行过抚育间伐,平均郁闭度在0.9以上。为了改变林分的生长状况,减轻林木的密度制约,提高木材的质量,现按不得低于总面积的3%,以随机抽查带状标准地的方式,调查单位面积林木的株数,以及胸径和树高等因子,确定抚育间伐的采伐量、采伐强度等技术指标,计算林木的出材量,制定抚育间伐设计方案,并对作业过程中可能出现的问题提出建议。

Gryptomeria fortunei plantations in Maogangzi forest area of Tianquan County have a relatively high planting density and not been cutted as yet. The average canopy density is up to 0. 9 now. In order to improve the status of forest stand, relieve the restrict of density and inhance the timber quality, the number of trees in unit area, trunk diameter and tree height were investigated at random by belt standard plot with the area not less than 3% to determine the cutting amount and intensity by above methords, aiming to calculate the outturn, set down the scheme of intermediate cutting, and put forward advice.