长白山杨桦次生林群落结构及培育目标林种研究

通过对长白山杨桦次生林群落结构和种群的调查,分析了各树种重要值及种间联结性,确定了培育的目标林种.结果表明：杨桦次生林的物种组成丰富,优势树种明显,白桦和蒙古栎在杨桦林中占有绝对优势;红松与白桦、蒙古栎、色木槭、山槐、山梨和紫椴表现为正联结关系,红松与暴马丁香、黄榆、假色槭、毛山楂、山杨和水曲柳表现为负联结关系;主要培育目标林种是紫椴和山槐,应适当间伐暴马丁香、假色槭.

Population Structure and Target Tree Species in Secondary Poplar-Birch Forests in Changbai Mountain

The important value of tree species and the inter-specific association were analyzed and the target tree species was determined on the basis of investigation of population structure in secondary poplar-birch forests in Changbai Mountain.The results showed：Rich in species composition and obvious dominant tree species,Betula platyphylla Suk and Quercus mongolica Fischer were obviously dominant species;6 species pairs exhibited highly significant positive association between Pinus koraiensis Sieb and Betula platyphylla Suk,Quercus mongolica Fischer Acer mono Maxim,Albizia kalkora（Roxb.） Prain,Pyrus ussuriensis maxim,Tilia amurensis Rupr.6 species pairs exhibited significant negative association between Pinus koraiensis Sieb.and Syringa reticulata,Ulmus macrocarpa Hance,Acerpseudo sieboldianum,Crataegus maximowiczii Schneid,Populus davidiana Dode,Fraxinus mandschurica Rupr.The target tree species were Tilia amurensis Rupr and Albizia kalkora（Roxb.） Prain,Syringa reticulate and Acerpseudo-sieboldianum should be properly thinned.