%0 Journal Article
%T CO2-release rate of soil respiration and litter decomposition of meadow marshes in Sanjiang Plain<br>三江平原草甸湿地土壤呼吸和枯落物分解的CO2释放
%A YANG Ji-Song
%A LIU Jing-Shuang
%A SUN Li-Na
%A <br>杨继松
%A 刘景双
%A 孙丽娜
%J 生态学报
%D 2008
%I 
%X Static-chamber in field and alkaline absorption methods were used to measured the CO2-release rates of soil respiration and litter decomposition of meadow marshes in Sanjiang Plain. The effects of environmental factors on CO2-release were discussed and then the contribution of the litter decomposition to the total CO2-release was estimated. Two types of D. angustifolia meadow (XZ and XD) were selected to synchronously observe the CO2 release and the temperatures of air and soil in the growing season. The results showed that the CO2 release temporally varied (p<0.05). The rates of soil respiration in the XZ and XD were higher in July and August and the daily averages were 6.08g m-2 d-1 and 9.26g m-2 d-1, respectively. However the rates of CO2-release from litter decomposition were higher in June and the daily averages were 1.76g m-2 d-1 and 3.10g m-2 d-1, respectively. The results also showed that the total CO2-release and release from litter decomposition were different between two sites of XZ and XD (p<0.05). There were a significantly exponential relationships between the soil respiration and soil temperature (p1<0.01, p2<0.05) and between the total CO2-release and air temperature (p1<0.01, p2<0.01) in sites of XZ and XD. Multi-analysis showed that temperatures of air and soil combined with monthly accumulative precipitation could effectively explain the changes of the total CO2-release (R12=0.967, R22=0.741) and soil respiration (R12=0.548, R22=0.893) in sites of XZ and XD, respectively. Based on the rates of CO2-release from different carbon pools, the contribution of litter decomposition to the total CO2-release was estimated to be 31% and 35% in the XZ and XD, respectively. This study demonstrated that during the transferring process from the plant carbon pool to the soil carbon pool, the litter in marsh as important release sources of carbon should not be neglected.
%K soil respiration
%K litter decomposition
%K temperature
%K water
%K meadow marshes
%K Sanjiang Plain<br>土壤呼吸
%K 枯落物分解
%K 温度
%K 水分
%K 草甸湿地
%K 三江平原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=928516C14501A67605EC858C7547DC6A&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=0B39A22176CE99FB&sid=5B2FB9494E6A1232&eid=8878116C7A30BB6AB69AE8D9E54EFFF4&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=6