我国80年代杉木林资源动态及营林对策的思考

本文概述了80年代我国杉木林资源动态,特点是面积、蓄积有所增加,单产下降,中幼林比重大,成熟林少,青黄不接的现象严重,后备资源比较乐观。杉木林面积在人工林总面积中比重偏大,产区森林组成针叶化趋势严重。指出营林对策是明确指导思想,集约经营,提高单产,提倡生态营林,注意林地的持续利用。

The Trends of Chinese Fir Resources in China in 1980s and Thinking of the Countermeasures for Forest Management

The area of chinese fir (Cunninghamia lanceolate (Lamb. )Hook) fo-rest in China is about 7.68 million ha, 15.2 percent of the area of conifer ous forests. The existing timber volume of Chinese fir is 268 million cubic metres,6.1 percent of the existing timber volume of coniferous. The total planted forests area that has become to forests since 1949 is about 18.47 million ha. , and 23.9 percent of the total planted forest area is Chinese fir. The characteristics of chinese fir resources in the eighties are as follows: 1. The area and volume are increased, but the yield of per unit is decrae-sed. 2. The proportion of mature forest is small (only 15.4 percent) , but the proportion of middle and young age is large. The reserve resources of Chinese fir and are hopeful. 3. The proportion of Chinese fir plantation area is large, and woodland is coniferousizing seriously. Some proposals have been put forward for keeping Chinese fir growing fast and high yield continuedly in this paper with regard to definiting the guiding ideoioge of mangement, (strenthening the intensive forestry) , properly controlling the deveioping scale of Chinese fir stands, improving the silviculture svstem of Chinses fir