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大面积营造速生丰产林已成为当今世界上解决木材短缺问题的主要途径。因此,对丰产措施的研究是当前营林工作的迫切任务。众所周知,林分郁闭后,林木便由个体生长进入群体生长阶段,而群体产量的高低、质量的优劣和生长的快慢,直接受林分结构的制约。为寻求合理结构,本文根据所调查的材料作了分析。一、调查林分概况调查地设在秦岭林区旬阳坝林场炸药库沟,海拔为1440米,坡度为22°的西南坡面上。树种为18年生的华山松人工林,生长状况良好。
A large area to create fast-growing and high-yield forests has become the main way to solve the problem of wood shortage in the world today. Therefore, the study on measures of high yield is an urgent task for the current forest management. As we all know, after the stand is closed, the tree grows from individual to the group growth stage. The quality of the group, the quality and the growth speed of the group are directly controlled by the stand structure. In an attempt to find a reasonable structure, this article analyzes the material under investigation. First, the investigation of the survey The survey site is located in Qinling Forest Xunyangba forest farm explosives reservoir ditch, elevation 1440 meters, a gradient of 22 ° on the southwest slope. Pinus armandii plantation of 18 years old, growing in good condition.