长白山森林群落凋落物现存量及其组成

Research on Forest Community Litter Accumulation in Changbai Mountain

以长白山主要支脉张广才岭和哈达岭山系为研究对象,通过对各林分类型凋落物现存量及其组成分析,探讨不同林分类型凋落物现存量的差异。结果表明,天然林凋落物平均现存量为5.97 t/hm^2;人工林凋落物平均现存量为5.96 t/hm^2;在天然林各调查群落中,阔叶混交林和落叶阔叶纯林面积占有较大比例,凋落物平均现存量分别为6.11和5.99 t/hm^2;其针叶混交林面积最小,平均现存量仅为2.74 t/hm^2;在人工林各调查群落中,针叶纯林面积最大,平均现存量为6.09 t/hm^2;针阔混交林面积最小,平均现存量为5.76 t/hm^2。在人工林、天然林未分解层各组分中,均表现出凋落叶(阔叶+针叶)>凋落枝(阔枝+针枝)>杂物的趋势。

Zhang Guangcai and Hada Mountains are the main branches of Paekdusan.Through the analysisof litter accumulation(LA)and composition in various forest types,this paper explored the differences of LA indifferent forest types.The average of forest LA in natural forest was5.97t/hm2,while the plantation forest was5.96t/hm2.The mixed forest of broad-leaved and the pure forest of broad-leaved accounted for a large proportionof various forest community of natural forest,which the average LA was6.11and5.99t/hm2,respectively.Theaverage of LA was only2.74t/hm2in coniferous forest,which was the minimum proportion.In plantation forest,the LA of coniferous pure forest was6.09t/hm2,which possessed a large proportion.The mixed forest of coniferousand broad-leaved occupied the lowest proportion,which the number of average LA was5.76t/hm2.There wasa trend that leaf LA was higher than the branch LA,while trash LA was lower than branch LA in the un-decomposedlayer of natural forest and plantation forest.