The function of earthworms in the Songnen grassland litters decomposition
Litter decomposition is an important part of ecosystem progress. The paper examined the function of earthworms in the decomposition of four species litter from Songnen grassland: Stipa baicalensis, Agropyron cristatum, Leymus chinensis and Puccinellia chinampoensis. The results showed that the earthworms action on grassland litters had played a positive role in litters decomposition. In a variety of litter, the average amount of decomposition with earthworms was higher than that of without earthworms. The order of the mean of decomposition with earthworm in different litter leaves was Agropyron cristatum ＞ Puccinellia chinampoensis ＞ Leymus chinensis ＞ Stipa baicalensis. There was no significant difference in a variety of litter stems decomposition with the earthworms action. In the same species litter, earthworms action on leaves of Agropyron cristatum decomposition was higher than stem but decomposition of the Leymus chinensis and Puccinellia chinampoensis leaves and stem were no significant difference. The earthworms growth, reproduction and metabolism in all species of litters were also significant differences in the process of decomposition. In all species litter leaves, the reproduction and daily excreta of the earthworms were Agropyron cristatum ＞ Sti pa baicalensis ＞ Puccinellia ch inampoensis ＞ Leymus chinensis and those of the earthworm in all species litter stems was Agropyron cristatum ＞ Puccinellia chinampoensis ＞Leymus chinensis.
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万方数据
维普
