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位于湖南省西南边陲的通道侗族自治县,是个以马尾松为主的天然次生林区。全县马尾松林占用材林面积的61.6％,蓄积量占用材林蓄积量的63.8％。现将这一古老树种在本地区的生长、利用等情况综合介绍如下: 分布范围和生长特点马尾松在通道县,水平分布遍及全境,垂重分布在海拔350—900米之间。总面积65407公顷中,幼林43673公顷,中林4487公顷,成林17247公顷;总蓄积量502.48万立方米中,幼林127.68万立方米,中林47.18万立方米,成林283.65万立方米。全县马尾松中林平均每公顷蓄积量105.15立方米,为全国马尾松中林平均每公顷蓄积量49.35立方米的2.13倍。成林平均每公顷蓄积量164.4立方米,为全国马尾松成林平均每公顷蓄积量111立方米的1.48倍,少数优良林分每公顷可达1500立方米以上。胸径26厘米以上的大径级马尾
Located in the Tongdao Dong Autonomous County, southwest of Hunan Province, it is a natural secondary forest dominated by masson pine. Pinus massoniana forest area occupies 61.6% of the total area, accounting for 63.8% of the volume of timber reserves. Now this ancient species in the region’s growth, utilization, etc. are summarized as follows: Distribution and growth characteristics Masson pine in the channel County, the horizontal distribution throughout the whole territory, the vertical distribution of 350-900 meters above sea level. The total area of 65,407 hectares of young and middle-aged forest is 43,673 hectares, the middle forest is 4487 hectares and the forest is forested is 17,247 hectares. The total volume of 5,248,800 cubic meters of young and middle-aged trees is 1,276,800 cubic meters, 471,000 cubic meters of Zhonglin and 2,836,500 cubic meters of forest. Masson pine forests in the county average volume of 105.15 cubic meters per hectare, the national average volume of Pinus massoniana per hectare 49.35 cubic meters of 2.13 times. The average volume of forest per hectare is 164.4 cubic meters, which is 1.48 times the average volume of 111 cubic meters per hectare of Pinus massoniana forest in China, and a few excellent stands can reach more than 1,500 cubic meters per hectare. Breast size 26 cm or more large diameter ponytail