森林凋落物分解过程中糖类组成变化的研究

本文报道了实验室条件下,森林枯叶分解过程中土壤有机质糖类的变化。结果表明,森林有机残体在土壤分解过程中,除了一部分有机残体被分解外,还有一部分存在于土壤中,属于腐殖质的糖类化合物参与分解,并进行更新。后者的量取决于枯叶本身的组成。其次,当有机残体分解朝向腐殖质化进行时,属于微生物来源的岩藻糖、核糖、鼠李糖和半乳糖所占的百分比,腐殖质部分中的要比非腐殖质部分中的高,而属于植物来源的木糖、阿拉伯糖所占的百分比则腐殖质部分中的要比非腐殖质部分中的低。

STUDIES ON THE CHANGES IN CARBOHYDRATE COMPOSITIONS IN PROCESS OF DECOMPOSITION OF FOREST LITTERS

The paper reports the changes in carbohydrates contained in organic matter of soil in decomposition process of forest litters under laboratory conditions for 730 days. The results show that carbohydrates belonging to humus, existed in soil partiapate in decomposition and have been renewed, besides part of the organic remainders to be decomposed in this process. The amount of decomposition and renew deponds on the component of litters. Secondly, when the organic remainders decompose towards humification, the percentage of fucose, ribose, rhamnose and galactose orginated from microbe in humus fraction is higher than that in non-humus fraction, where as the percentage of xylose and arabinose originated from plants in humus lower than that in non-humus.