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。 This paper describes the results of the five year trial in the broadleaved Korean pine forest in Xiaoxing’an Mountains. From 1984, the litter of Korean pine, Tilia amurense, Betula platyphylla, Betula platyphylla and Quercus mongolica were studied. Decomposition process by discrete, adhesion, semi-decomposition, decomposition. The rate of decomposition among different species is very different, but the difference among different forest types in Korean pine forest is less than that between species. According to the data of two years of decomposition, a mathematical model of decomposition rate and decomposition time was established. According to the parameters given by computer, the time required for litter decomposition to 95% and 98% was calculated. However, in the stand of mixed forest litter, not only the single litter segregated in isolation, but also the litter decomposed with different litter, which was about a middle level of decomposition.