封山育林对杉木人工林林下植被物种多样性恢复的影响  

The Influences of Closing for Afforestation on Vegetation Diversity Restoration under Chinese Fir Plantation

作　　者：蔡道雄[1] 卢立华[1] 贾宏炎[1] 何日明[1] 

机构地区：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600

出　　处：《林业科学研究》2007年第3期319-327,共9页Forest Research

基　　金：国家"十五"科技攻关项目"林业生态工程构建技术研究与示范"(2001BA510B06)

摘　　要：通过对杉木纯林进行密度调控,并采取封育和非封育管理6 a,结果显示:短期的封山育林对杉木林分的整体状况没有产生明显的影响,但对其林下植被的物种多样性及植被的生长产生了较显著的影响,在封育区林下植物有60科、101属、116种,植被的总盖度达85%,而非封育区林下植物只有49科、78属、88种,植被的总盖度仅达60%;封育区与非封育区比,封育区林下植物种数增加了28种,增量为31.82%,植被总盖度增加了25%,且多了1层高度>2 m的木本植被层。主要植物特征值分析显示:封育区林下植物的相对密度、相对盖度及重要值等特征值较高的种数都比非封育区多,所占的比例也高;在封育区,对叶榕的重要值最高,达100.43%,且重要值≥35%的种有16种,占其林下植物总种数的13.79%,而在非封育区,断肠草的重要值最高,仅达34.77%,重要值≥35%的种为零;封育区林下植物的优势度比非封育区更为明显。By density control and 6 years＇ closed and non-closed management for Chinese fir pure stands, it was found that short-term closing had no significant influence remarkably affected the vegetation biodiversity and growth on the overall performance of Chinese fir plantation, but under forest. In closed area, there were 116 plant species belonging to 101 genera of 60 families, with the vegetation coverage 85% , while in the non-closed area, there were only 88 plant species belonging to 78 genera of 49 families, the vegetation coverage was about 60%. Furthermore, there existed a woody vegetation layer with the height 〉 2 m in closed area. The result of key trait value analysis showed that the relative density, relative coverage and some other important traits in closed area were higher than that in non-closed area. In closed area, Ficus hispida had the highest importance value： 100.43%, and other 16 species had the importance value no less than 35%, which occupied 13.79% of total undergrowth species. In non-closed area, Gelsemium elegans had the highest importance value （34.77%） and there were no species with importance value 335%. The dominance of undergrowth in closed area was more obvious than that in non-closed area.

关 键 词：封山育林 杉木人工林 林下植被 特征值 

分 类 号：S755[农业科学—森林经理学]