榕树叶片分解过程物质与能量动态变化研究  

Study on the dynamics of matter and energy during the decomposition of Ficus microcarpa leaves.

作　　者：丁印龙[1] 向平[2] 谭忠奇[2] 林益明[2] 

机构地区：[1]厦门市园林植物园,厦门361003 [2]厦门大学生命科学学院,厦门361005

出　　处：《中国生态农业学报》2005年第1期53-56,共4页Chinese Journal of Eco-Agriculture

基　　金：福建省建设厅及厦门市政园林局项目 (YK 2 0 0 0 14 )共同资助

摘　　要：对榕树叶片分解过程中物质与能量动态变化研究结果表明 ,叶片分解过程中干物质量呈下降趋势 ,半分解期的理论值为 10 1d ,且与实测值十分接近。叶片分解过程中C含量前 5个月变化较小 ,随后呈下降趋势 ;N含量升高 ,C/N值下降。分解初期单宁含量迅速下降 ,而分解后期其含量相对稳定 ;随榕树叶片分解可溶性糖含量下降而粗蛋白质含量呈上升趋势 ;分解过程中可溶性糖含量与单宁含量均遵循指数方程变化 (P <0 .0 1)。榕树落叶分解的前 2个月其干物质量热值略下降 ,之后 2个月其干物质量热值开始上升 ,特别是在分解的第 4个月其干物质量热值迅速上升并达最大值 ,之后干物质量热值开始迅速下降。分解的第 1个月去灰分热值略下降 ,第 2个月开始上升 ,至第 4个月达 (半分解期 )最高值 ,之后去灰分热值呈下降趋势。The dynamics of matter and energy during the decomposition of Ficus microcarpa leaves are discussed in this paper.The results show that the dry matte r of leaves declines during the decomposition of leaf,the theoretical value half -time of leaf decomposition is 101d,it is simi lar to the tested value;in t he first 5 months,the C content changes little,then declines;N concentration in creases and the ratio of C/N decreases;the tannin content ra pidly decreases at the beginning of decomposition and then keeps stable in the later stage;the sol uble sugar content decreases and the crude protein content increases during the d ecomposition;somewhat the gross caloric value decreases at the beginning of dec omposition and then increases at the third and 4th month,and then decreases;the ash free caloric value increases with increasing degree of decomposition and the n decreases.

关 键 词：榕树 叶片 分解过程 物质变化 能量变化 动态变化 凋落物 

分 类 号：S792.99[农业科学—林木遗传育种] S718.554[农业科学—林学]