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本文对北京西山人工油松林中油松和栓皮栎的枯叶分解速率进行了研究,结果表明两种枯叶的分解速率差别不大。在人工油松林中放置591天的枯叶失重率为24.21—28.06%,用指数衰减模型估算枯叶的年腐解率,油松枯叶为0.190—0.210g/g/年;栓皮栎枯叶为0.176—0.203g/g/年。根据枯叶的化学成分分析表明,枯叶的失重,初期是由粗脂肪、可溶性糖、丹宁、有机碳等的丧失所引起。油松和栓皮栎枯叶的失重率与化学成分净丧失值的相关系数分别为0.970(P<0.05)、0.982(P<0.05)。
In this paper, the decomposition rate of dry leaves of Pinus tabulaeformis and Quercus variabilis in Artificial Pinus tabulaeformis forests in Beijing Xishan was studied. The results showed that the decomposition rates of the two kinds of dead leaves were not significantly different. The dead weight loss rate of 591 days in artificial pine forests was 24.21-28.06%, and the annual decomposition rate of dead leaves was estimated by exponential decay model. The dry weight of the leaves was 0.190-0.210 g / g / year; 0.176-0.203 g / g / year. According to the analysis of dead leaves, the weight loss of dead leaves is caused by the loss of crude fat, soluble sugar, tannin and organic carbon in the early stage. The correlation coefficients of weight loss rate and net loss of chemical components in the dry leaves of Pinus tabulaeformis and Quercus variabilis were 0.970 (P <0.05) and 0.982 (P <0.05), respectively.