小兴安岭阔叶红松林主要树种凋落物的分解研究

本文叙述在小兴安岭阔叶红松林内五年试验结果,从1984年起对红松、籽椴、色木、白桦和蒙古栎凋落物进行分解研究。分解过程经离散、粘连、半分解、分解。不同树种间分解速度差异很大,而红松林内不同林型间小于树种间差异。根据二年的分解实测数据,建立了分解速率与分解时间的数学模型,按计算机给出的参量,计算出凋落物分解到95％和98％所需时间。但在现实林分中凋落物混合在一起,并非单一凋落物孤立分解,不同凋落物协同分解,大约处于一种中等分解水平。

LITTER DECOMPOSION OF SOME DOMINANT TREE SPECIES BROADLEAVED KOREAN PINE FORESTS IN LESSER XINGAN MOUNTAINS

Five-years experimental results on litter decomposition of Pinus,koraiensis, Tilia amurensis. Acer mono, Betula Platyphylla and Quercus mongolica in the broadleaved/Pinus koraiensis forest in the Lesser Xingan Mountains are reported in the paper.The decomposition process can be divided into separation, contaction semidecomposition and decomposition, the difference of whose rate among tree species is significant, but that among forest types is not.The decomposition has been established, and the time required for decomposing 95% and 98% has been calculated based on the two-year experimental data of decompomposition.