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抚育间伐是一项培育速生丰产林的重要措施,而决定间伐效果最关键的一个技术指标就是间伐强度。只有采用合理的间伐强度,才能形成一个合理的群体结构,这种群体结构既能使各个体有充分发育条件,又能最大限度利用空间,有利于达到速生、丰产、优质的目的,有利于增强森林的防护效能,有利于提高单位面积的经济收入。 间伐强度的确定,其实质就是林分合理经营密度的确定,即单位面积最佳保留株数的问题。下面就落叶松人工林对这一问题作一粗浅的探讨。
Thinning tending is an important measure to cultivate fast-growing and high-yielding forests. One of the most important technical indicators that determine the thinning effect is thinning strength. Only by adopting reasonable thinning intensity can a reasonable group structure be formed. This group structure can not only make each individual have sufficient development conditions but also make full use of space, which is beneficial to achieving fast growth, high yield and good quality, and is conducive to enhancement The protective effectiveness of forests is conducive to raising the economic income per unit area. The determination of thinning intensity, its essence is to determine the rational management of the forest density, that is the best per unit area to retain the number of issues. The following larch plantation on this issue for a superficial discussion.