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云南松林的面积和林木蓄积量,在其分布区内的森林资源中,均占优势,云南松在林业生产建设上有着重要地位。本文利用400多块测树样地、12块皆伐测树样地、25000株样木和大量森林调查实测材料,进行分析研究。云南松林分结构特点为林木组成单纯、林相整齐,是同龄的单层林。林木高度结构,为最高林木是平均树高的1.4倍,最低树高是平均树高的60％。成熟林分林木平均直径一般为24—28厘米。云南松林分的生长规律为具有生长较快,并采用经验公式求算材积生长与直径、树高生长的相关关系为V=-4.1976D~(1.9760)H~(0.8843)。同时初步提出各种成熟龄,为合理经营利用提供参考依据。
The area and tree stock volume of pine forests in Yunnan are predominant among the forest resources in their distribution areas. Yunnan pine plays an important role in forestry production and construction. In this paper, more than 400 pieces of tree-measuring plots, 12 clear-cut tree-planting plots, 25000 samples of wood and a large number of forest survey data were analyzed. Yunnan pine forest sub-structure characteristics of simple forest composition, forest neat, is the same age single-layer forest. The height of the forest is 1.4 times the highest tree height for the highest trees and 60% of the average tree height for the lowest tree height. The average diameter of mature forest trees is generally 24-28 cm. The growth pattern of Pinus yunnanensis stands is fast growing, and the empirical relationship between volume growth and diameter and tree height growth is V = -4.1976D ~ (1.9760) H ~ (0.8843). At the same time, various mature ages are initially proposed to provide reference for reasonable operation and utilization.