流域森林资源调查及生物量动态研究——以潭江流域为例

Research on forest source and biomass dynamic of Tanjiang River Basin

对潭江流域森林组分与生物量调查研究发现:与1990年比较,2002年整个流域的林业用地面积增加了18962.1hm2,增长4.48%。流域生物量以湿地松和马尾松占优势,分别占流域森林生物量的39.12%和21.38%,阔叶树占15.39%,桉树和杉树分别占9.08%和7.97%,其它树种只占7.06%,总体来说,流域平均生物量2002年比1995年提高了6.21t·hm-2,平均每年提高0.89t·hm-2。说明近十二年来,植树造林的生态效益逐步体现出来,但同时也存在生物群落以马尾松、湿地松等先锋物种为主,森林结构单一的问题。通过分析研究,为潭江流域森林结构优化与科学管理提供依据。

Forest ecosystem is an important nature system for human,it affords much more ecological serve functions. We researched on forest construction and biomass change of Tanjiang River Basin. The results were as follows.Compared with 1990, forest land-use area had raised 18 962.1 hm^2, accounting for 4.48% of forest land-use area in 1990. On the research of biomass in basin, Pinus elliottii and P. massoniana biomass occupied 39.12% and 21.38% respectively, broad-leaved forest 15.39%, Eucalyptus 9.08%, and Cunninghamia lanceolata 7.97% ,other forest species 7.06%. In all,the basin biomass had increased 6.21 t ·hm^-2 from 1995 to 2002. The biomass speed is 0.89 ·hm^-2 ·a^-1. Which showed ecological benefit of vegetation planting of Tanjiang River Basin,but in this paper,we found some problems. For example, forest construction was slmple,and consisted of vanguard plants,such as P. massoniana and P. elliottii. The result will be regarded as a scientific evidence for forest management.