论文部分内容阅读
一、前言云南松(Pinus yunnanensis Franch)是贵州主要用材树种之一,其分布面积占全省森林面积的7.7％,蓄积占用材蓄积的7.2％。由于大量开发利用,采伐迹地逐年增加,更新问题已引起了各方面的重视。笔者从事贵州林业调查多年,将所获资料初步加以整理,试图对云南松天然更新规律进行初步探讨。为了得出较为确切论据,1963年在我省水城县杨梅林场调查了林地9139公顷,设置标准地104个,样方1992块,样方面积9759平方米,作为印证。
I. Introduction Pinus yunnanensis Franch is one of the main timber species in Guizhou. Its distribution area accounts for 7.7% of the total forest area in the province and 7.2% of the accumulated timber. Owing to the large amount of exploitation and utilization, the number of deforestation sites has been increasing year by year. The renewal issue has drawn great attention from all quarters. The author engaged in Guizhou forestry surveys for many years, the information obtained to be initially sorted, trying to Yunnan pine natural renewal of a preliminary study. In 1963, 9,139 hectares of woodland were surveyed in Yangmei Forestry Center, Shuicheng County, 1963, setting 104 standard plots and 1992 quadrats, with an area of 9,759 square meters on the sample plot, confirming this.