摘要
对延边地区不同密度天然赤松林中不同生长势的赤松个体地上部生物量进行了研究.结果表明,不同生长势赤松生物量变化受密度影响的顺序为:优势木<平均木<被压木;各器官生物量分配比例受密度影响的顺序为:干>枝>叶>皮.不同生长势赤松的生物量结构在林分密度达到Ⅲ级时发生显著变化,其中平均木的变化与林分基本相同.不同生长势赤松的生物量垂直分布虽然各具特点,但都表现为:树干和树皮生物量主要分布在6m树高范围内,树枝则集中在6～10m范围,针叶在上、中、下3层林冠中均分,上层林冠的枝叶量受密度影响最小.
The aboveground biomass of individuals with different growth potentials in natural Pinus densiflora forest with different stand densities was measured in Yanbian,Jilin Province.The variation of individual biomass affected by densities was in order of dominant tree<intermediate tree<suppressed tree,while the distribution proportion of biomass in different organs affected by densities was:in order of trunk>branch>needle>bark.The biomass components of P.densifliora with different growth potentials varied markedly with the approaching of density class Ⅲ,and the change of intermediate trees was similar to the whole stand.The vertical distributions of biomass of different trees were different from each other,but all showed that the biomass of trunks and barks was mainly distributed below 6 m high from ground,that of branches was within 6～10 m high,that of needles was uniform in the upper,middle and lower layers,and that of branches and needles in upper layer was least affected by density.
出处
《应用生态学报》
CAS
CSCD
2000年第1期5-8,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金!资助项目 (39360 0 68)
关键词
天然林
赤松
个体生物量
林分密度
生长势
Natural forest, Pinus densiflora , Individual biomass, Stand density.
