木荷次生林竞争生长规律研究  

Competitive Growth Law of Schima superba Secondary Forest

作　　者：刘发林[1] 曾思齐[1] 肖化顺[1] 吕勇[1] 刘玉[1] 彭其龙[1] 

机构地区：[1]中南林业科技大学,湖南长沙410004

出　　处：《西北林学院学报》2014年第1期144-147,共4页Journal of Northwest Forestry University

基　　金：国家林业局林业公益性行业项目"南方集体林区次生林抚育间伐与高效利用技术研究"(201004032);湖南省教育厅项目:"木荷天然次生林竞争生长规律研究";天保工程区天然公益林抚育经营关键技术研究(201204504)

摘　　要：选择4种典型木荷次生林竞争格局,采用Hegyi竞争指数统计各竞争格局对象木竞争指数。结果表明：1）第1种竞争格局：8~15a内木荷对象木竞争指数缓慢增大,15a以后的竞争指数增加幅度加大。2）第2种竞争格局：4~6a内竞争指数明显下降,而6a后缓慢下降。3）第3种竞争格局：4~6a内对象木竞争指数迅速下降,6~8a内缓慢下降,第8年后对象木竞争指数呈现持续缓慢增大趋势。4）第4种竞争格局：5~8a内对象木的竞争指数表现出明显下降趋势,而后缓慢下降,第9年开始,对象木竞争指数基本平稳在0.20~0.28,但有缓慢下降的变化趋势。Four kinds of competitive patterns in Schima superba secondary forest were selected,competition indices of the objective trees were measured by Hegyi competition index in each pattern.The results were as follows.1）Within the first competition pattern,competition index of the objective trees with the ages of 8 to 15years old increased slowly,and the amplitude of the increase was higher in the trees over 15years. 2）In the second competition pattern,the competition index of the objective trees which aged between 4 and 6years decreased obviously and decreased slowly after 6years.3）In the third competition pattern,the competition index of the objective trees which aged between 4 to 6years decreased quickly and which aged between 6 to 8 years decreased slowly,while competition index increased continuously and slowly after 8 years.4）In the fourth competition pattern：the competition index of the objective tree which aged between 5 to 8 years showed obvious downtrend and decreased slowly.Competition index kept between 0.20 and 0.28 after 9years,but it decreased slowly.

关 键 词：木荷次生林 竞争指数 竞争格局 

分 类 号：S758.52[农业科学—森林经理学]