Decomposition of organic chemical components in relation to nitrogen dynamics in leaf litter of 14 tree species in a cool temperate forest
Decomposition of organic chemical components in relation to nitrogen dynamics in leaf litter of 14 tree species in a cool temperate forest
复制标题
DOI：
10.1007/s11284-004-0002-0
复制
发表时间：
2005-01-01
影响因子：
2
通讯作者：
Takeda, H
中科院分区：
文献类型：
--
作者：
Osono, T;Takeda, H
研究了14种树种凋落叶中木质素、纤维素、多酚和可溶性碳水化合物的分解与氮素动态的关系。评价了14种凋落物类型中有机化学成分和N对凋落物质量损失率的影响。这项研究是在日本一个凉爽温带森林的森林斜坡的上下部分进行的，为期3年。根据固氮化和活化程度，将分解过程分为前期和后期两个阶段。上下样地凋落物整体质量损失率和有机化学成分损失率基本一致。14种凋落物类型中，固定期凋落物质量损失均快于动员期，这是由于动员期总纤维素、多酚和可溶性碳水化合物的质量损失较固定期减少所致。不同相间木质素的质量损失率无显著差异。固定期和动员期凋落物质量损失率与木质素含量呈负相关，与固定期和动员期开始时的多酚和可溶性碳水化合物含量呈正相关。但与全纤维素和N含量均无相关性。
Decomposition of lignin, holocellulose, polyphenols and soluble carbohydrates was investigated in relation to nitrogen (N) dynamics in leaf litter of 14 tree species. The influence of organic chemical components and N on litter mass loss rate was then evaluated for 14 litter types. The study was carried out over a 3-year period on upper and lower parts of a forest slope in a cool temperate forest in Japan. The decomposition processes were divided into early and late phases based on N immobilization and mobilization. Mass loss rate of whole litter and organic chemical components was similar for the upper and lower sites. Litter mass loss was faster in the immobilization phase than in the mobilization phase in each of 14 litter types, which was ascribed to the decreased mass loss of holocellulose, polyphenols and soluble carbohydrates in the mobilization phase as compared to the immobilization phase. Mass loss rate of lignin was not different between the phases. Litter mass loss rate in the immobilization and mobilization phases was negatively correlated to lignin content and positively correlated to contents of polyphenols and soluble carbohydrates at the start of these phases. but was not correlated to holocellulose and N contents In either phase.