摘要
通过设置临时样地,对南岭山地九连山自然保护区人工杉木林(28a)和天然杉木林(100a)进行群落学特征比较研究。结果表明:两种起源的杉木林物种组成差异不大,人工林有维管植物39科59属83种,天然林有52科72属93种,二者种组成相似程度较高,相似性系数达0.592,尤其是下木层和草本层;同时,二者物种多样性及均匀度也相似,但除下木层外,人工林乔木层和草本层的多样性指数和均匀度指数比天然林要低,而生态优势度正与此相反,人工林乔木层生态优势度最高;天然林与人工林杉木种群都属衰退型种群,一些中生或阴生及常绿阔叶树种却属增长型种群,这表明天然林与人工林杉木林都正在向常绿阔叶林演替。
The community characteristics of natural forest and plantation of Cunninghamia lanceolata in Jiulianshan Natural Reserve in Nanling mountains were comparatively studied by temporary samle plots. The results indicated that the plantations and the natural forests were less difference in species, there are about 83 vascular plants belonging to 59 genus and 39 family in plantation and 93 vascular plants belonging to 73 genus and 52 family in the natural forest. The species components of two communities similar to a higher degree, the similarity coefficient was 0.592, especially the understories and herb layers. Both the species diversity and evenness of the plantation were almost equal with the natural fores4 but from the angle of spatial structural pattern, natural forest presented a high index of diversity evenness in the arborous and shrub layers, and plantation showed a high ecological dominance index in undergrowth. Meanwhile, the populations of the C. lanceolata in two communities were declining, and other broad-leaved mesophyte or climax trees were growthing. It is proposed that the natural forest and plantation of C. lanceolata are developing towards the local climax vegetation--subtropical evergreen broad-leaved forest.
出处
《江西林业科技》
2008年第5期10-15,共6页
Jiangxi Forestry Science and Technology
基金
江西农业大学博士基金项目(项目编号:1686)
生物措施治理水土流失(森林健康)项目
关键词
杉木人工林
杉木天然林
群落特征
南岭山地
Cunninghamia lanceolata plantation
C. lanceolata natural forest
Community characteristics
Nanling Mountain
