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作 者 ：王娓, 郭继勋

期 刊 ：应用生态学报 2001年 12卷 6期 页码：841-844

关键词：凋落物；分解速率；环境因素；季节动态；碱茅群落；

Keywords:Litter, Decomposition rate, Environmental factors, Seasonal dynamics, Puccinellia tenuiflora community,

摘 要 ：对碱茅群落凋落物分解季节动态与微生物呼吸速率、土壤有机质、土壤C/N、土壤温度、土壤水分等11种环境因素的季节动态进行了研究.结果表明,凋落物分解季节动态呈单峰曲线,8月中旬达最大值8.109mg·g^-1·d^-1;凋落物分解指数为1.93,95%凋落物分解约需4a:微生物呼吸速率季节动态呈单峰曲线,7月中旬达最大值,为11.4g·C·m^-2·d^-1;凋落物分解速率同土壤有机质含量、土壤C/N显著负相关;凋落物分解速率同土壤温度显著正相关.

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穏^-1 穌^-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稢穖^-2 穌^-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.

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