摘要
通过对贵州5个项目县8个森林经营单位内近自然经营间伐前后林木胸高断面积、树高、蓄积、株间距、空间配置面积等林分因子进行对比分析,揭示近自然间伐后对林分结构的影响趋势。结果表明:对林分实施近自然间伐后,林木胸高断面均值、树高均值、蓄积量值均有一定程度增加,通过近自然间伐可使林分较间伐前更加健壮,林分机械稳定性有一定程度的提高;通过近自然间伐虽在总体上有利于促进林木优势分化,但不能通过一次近自然间伐活动在短期内得以实现;通过近自然间伐可使林木最小株间距和空间配置面积均值增加,林木生长空间得到有效扩展,林木间竞争得到有效缓和,并使林木空间分布更趋均匀,从而促使林分整体快速生长。
In the paper,some influence factors,such as forest stand structure,basal area at breast height,tree height,volume,space configuration,plant spacing area,etc.were analyzed before and after thinning in the close-to-nature management forest,and then revealed the impact trend of close-to-natural thinning on stand structure. Results showed that after the close to nature thining,the average of basal area at breast height,tree height,volume increased,the stand became more robust,and the mechanical stability of stand was improved.Although close to nature thinning was advantageous to the trees′optimizing development,advantages could not be realized in a short time.Close-to-nature thining made the minimum spacing and space configuration area increased,the grow space of trees expanded,the competition between trees eased,and the forest spatial distribution uniformed,and then improved the rapid growth potential of the whole forest.
出处
《西南林业大学学报（自然科学）》
CAS
2014年第5期25-30,共6页
Journal of Southwest Forestry University：Natural Sciences
基金
中德财政合作贵州森林可持续经营项目资助
贵州林业科学技术研究项目(2008-03)资助
关键词
中龄林
近自然森林经营
间伐
林分结构
空间配置
mid-aged forest
close-to-nature forest management
close-to-nature thining
stand structure
space configuration area
