摘要
干扰对人工诱导阔叶红松林的群落结构及高等植物多样性的影响分析表明：次生林抚育改造32年,经过2次上层抚育采伐作业（择伐上层保留木）,部分红松已进入主林层,形成优势种群.林分乔木层具有明显的层次结构,红松在林分各层均有分布.林分各层次之间在蓄积分配上,第Ⅰ层林木蓄积最大,第Ⅱ层次之,第Ⅲ层最小,第2次上层抚育采伐作业前蓄积比为5∶3∶2,作业后为4∶4∶2.对林分大径木（20 cm以上）、中径木（14～18 cm）、小径木（14 cm以下）蓄积比进行统计分析,采伐前为5∶3∶2,采伐后为4∶4∶2.同时,各试验区林木径阶呈连续分布,且中、小径木株数较多,呈现出健全的林相,为目前较理想的异龄复层阔叶红松林.上层抚育时择伐上层林木,其林分乔木层、灌木层和草本层的丰富度、Shannon-Wiener指数、均匀度均高于皆伐上层林木的林分,而与对照区差异较小.人工诱导阔叶红松林在上层抚育时,择伐上层林木比皆伐上层林木在保护高等植物多样性上更具优势.
Analysis of the effects of disturbance on artificially inducing broadleaved Korean pine forests showed that tending the secondary forests for 32 years,by using twice upper storey cutting（selectively cut and remained the trees in the upper layers）,parts of Korean pine grew into main storey and became the dominant populations.Korean pine distributed in every storey.To the stock volume,the largest one is in the first storey,and medium in the second storey,least in the third storey.The ratio of volume was 5∶3∶2 before the second cutting in the upper storey and 4∶4∶2 afterwards.The same ratio changes were also found in large（DBH〉20 cm）,medium（DBH was from 14 to 18 cm） and small logs（DBH〈14 cm） before and after cutting.Meanwhile,diameter class distribution in each plot is continuous with more medium and small diameter trees,showing perfect forest form.It is much ideal uneven-aged broadleaved Korean pine forest.The abundance index,Shannon-Wiener index,evenness in arbor,shrub and herb layer by selectively cutting trees in the upper layer are higher than those of clear cutting the upper trees,slightly different comparing to the control.To the artificially inducing broadleaved Korean pine forests,selectively cutting trees in the upper layer is prior to clear cutting in protecting the diversity of higher plants.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2007年第6期72-78,共7页
Journal of Beijing Forestry University
基金
"十一五"国家科技支撑计划专题(2006BAD03A04)
辽宁省科学技术厅重点研究项目(2001207002)
关键词
干扰
人工诱导
阔叶红松林
群落结构
多样性
disturbance,artificial inducement,broadleaved Korean pine forest,community structure,diversity
