Seasonal dynamics of environmental factors and decomposition rate of litter in Puccinellia tenuiflora community of Songnen grassland of China

Abstract

Abstract: This paper discussed the seasonal dynamics of eleven environmental factors and decomposition rate of litter in Puccinellia tenuiflora community.The environmental factors included microorganism respiration rate,soil organic matter content,the ratio of carbon to nitrogen of soil,soil temperature,soil water content,and etc.The seasonal dynamics of decomposition rate of litter showed a single-peak curve with the maximum 8.109mg·g^-1 ·d^-1 in the middle August.The decomposition index of litter was 1.93,and 4 years would be needed to decompose 95% of the litter accumulated in the ground.The seasonal dynamics of microorganism respiration showed a single-peak curve with the maximum 11.4g·C·m^-2 ·d^-1 in the middle July.The decomposition rate of litter was negatively correlated with soil organic matter content and the ratio of C/N of soil,and positively correlated with soil temperature.

Key words: Litter, Decomposition rate, Environmental factors, Seasonal dynamics, Puccinellia tenuiflora community, urban building land, non-point source pollution, simulation, area thre-shold., prediction

CLC Number:

Q948.12

WANG Wei, GUO Jixun. Seasonal dynamics of environmental factors and decomposition rate of litter in Puccinellia tenuiflora community of Songnen grassland of China[J]. Chinese Journal of Applied Ecology, 2001, 12(6): 841-844.

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