木荷次生林经营密度调控技术的研究  

Study on density control technology of Schima superba secondary forest

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

机构地区：[1]中南林业科技大学,湖南长沙410004

出　　处：《中南林业科技大学学报》2013年第11期26-28,52,共4页Journal of Central South University of Forestry & Technology

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"(13C1155)

摘　　要：为了提高次生林的经营水平,提出了竞争结构单元的新概念,以地上部分生物量为因变量,郁闭度为自变量,模拟木荷次生林地上部分生物量与郁闭度间关系。结果表明:林分地上部分生物量达最大时,林分的郁闭度为0.685 4;若控制郁闭度为0.68,竞争结构单元面积越大,竞争结构单元越少;竞争结构单元面积最大时,单位面积林分最少保留株数等于最少竞争结构单元个数与每个竞争结构单元林木株数(5株)的积。以木荷标准地资料为例计算了木荷次生林抚育间伐强度,表明基于竞争结构单元的抚育间伐技术可在次生林经营中推广。In order to improve the management level and provide management basis of secondary forests, a new concept of competitive structural unit was put forward. Aboveground biomass was taken as the dependent variable, canopy density was taken as the independent variable, the relationship between aboveground biomass and canopy density of Schima superba secondary forest was simulated. The results show as followings： the biomass reached the maximum value when canopy density was 0.685 4; if the canopy density was controlled at 0.68, the area of competitive structural unit was more larger, the number of competitive structural unit was less, each competitive structural unit had five trees. When the competitive structural unit area reached the maximum value, the least reserved density equaled to the number of competitive structural unit multiplied by five. Sample plot had been taken as an example to calculate thinning intensity of Schima superba secondary forest. It showed that thinning technology which based on competitive structural unit can be extended in secondary forest management.

关 键 词：木荷次生林 经营密度调控 抚育强度 竞争结构单元 

分 类 号：S711[农业科学—林学] S753.7