不同比例凋落物的分解动态变化研究

Study on the Dynamics Changes of Litter Decomposition in Different Proportions

为分析凋落叶多样性对凋落物不同分解阶段分解量及分解速率的影响,采用将不同混合比例的凋落物装入分解尼龙网袋的方法,进行了野外分解实验,结果表明:在不同分解阶段,纯杉木凋落叶的分解量均较低,这表明单一凋落叶组成可能不利于凋落叶的分解。同时,从凋落叶的分解速率来看,纯杉木凋落叶在分解初期的分解速率较差,随着分解时间的增加,杉木+马尾松凋落叶的分解速率则较差。

Toanalyze the influence of diversity of litter leaf on different decomposition stages and rates, weadopted the method of mixing different proportions of litter into the nylon bag for field decomposition experiment. The results showed that： in different decomposition stages, pure litter decomposition rate of Cunninghamia lanceolatewas low, suggesting that the composition of single litter leaf might not be conducive to the decomposition of litter leaf. On the other side, for the litter leaf decomposition rate, the rate of pure Cunninghamia lanceolate litter in the initial stage of decomposition was poor, and with the increase of the decomposition time, decomposition rate of Cunninghamia lance- olate and Masson pine litter leaf was poor.