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杉木林的抚育间伐是营林的基本措施之一,它能调节林分的叶面积,便群体达到适宜的光能利用,形成较多的干物质。本试验将苏南丘陵地区抚育间伐后的杉木林群体叶面积及产量的变化情况作如下报道:
The thinning of fir forest is one of the basic measures of silviculture. It can adjust the leaf area of the stand so that the population can reach the appropriate light energy utilization and form more dry matter. In this study, the change of leaf area and yield of Chinese fir plantation after thinning in the hilly area of southern Jiangsu was reported as follows: