几种树木枯叶分解速率的试验研究

 本文对几种树木的枯叶分解速率进行了研究，结果表明枯叶的分解速率因树种不同而异。一年的失重率刺槐、山杏、侧柏、元宝槭、黄栌分别为54%、64%、78%、73%、65%。应用指数衰减模型计算枯叶的年腐解率，刺槐、山杏、侧柏、元宝械、黄栌分别为0.490g／(g·a)、0.597g／(g·a)，0.990g／(g·a)、0.800g／(g·a)、0.662g／(g·a)。根据枯叶的化学成分分析表明，枯叶的失重，首先是由粗脂肪，可溶性糖、丹宁，有机碳等的丧失所引起。枯叶在一年的分解过程中，碳、氮含量比值随时间的推移而下降。

STUDIES ON THE LITTER DECOMPOSITION RATES OF SEVERAL PLANTS

In this paper, the litter decomposition rates of several plants have been studied, the results showed that the litter decomposition rates were different with different plants. The ratio of weight losses of the litter of Robinia pseudoacacia, Armeniaca vulgaris var. ansu, Platycladus orientalis, Acer truncatum and Cotinus coggygria var. cinenea for one year were 54%, 64%, 78%, 73% and 65%, respectively. According to the exponential decay model, the estimated litter decomposition rates of Robinia pseudoacacia, Armeniaca vulgaris var. ansu, Platycladus orientalis, Acer truncatum and Cotinus coggygria var, cinenea were 0.490g/(g·a),0.597g/(g·a),0.990g/ (g·a), 0.800g/(g·a) and 0.662g/(g·a) per year, respevtively. The chemical component analysis of the litters showed that the weight loss of the litters was due to the losses of gross fat, soluble sugar, tanin and organic carbon initially. The ratio of the carbon content and the hitrogen content of the litters decreased with the passage of time during the annual decomposing process.