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经营杉木林的最终目的是提高林分的产量和质量,而抚育间伐是定向培育森林,提高林分产量和质量的关健营林技术措施,本文拟就我省的具体情况对杉木林的抚育间伐谈一点看法,供参考.一、抚育间伐的作用和效益在杉木林的生长发育过程中,从造林到林分郁闭之前,植株个体之间竞争不明显.幼林郁闭之后,随着林木个体的生长,林分郁闭度的逐步增加,林内的光、温、水、气以及土壤养分供应等条件发生一定的变化,林木个体之间争夺营养空间的矛盾逐渐加剧,并逐渐产生严重的分化现象和自然整枝,其结果使冠长、冠幅缩小,叶量和叶面积减少,林分生长量下降.
The ultimate goal of the management of Chinese fir is to improve the yield and quality of the stand, while tending thinning is a key technical measure of silviculture that aims to nurture the forest and improve the yield and quality of the forest. This paper plans to nurture Chinese fir plantation For some reference, please refer to the following: First, the role and benefits of tending thinning In the process of growth and development of Chinese fir plantation, there is no obvious competition between individuals until the plantation is closed, The growth of individuals, the gradual increase of canopy density, the changes of light, temperature, water and gas in the forest and the supply of nutrients in soil have undergone some changes. The conflict between forest individuals competing for nutrition space has been gradually aggravated, and gradually serious Differentiation and natural pruning, the results of the crown length, crown width reduced, the amount of leaf and leaf area decreased, stand growth decreased.