Contribution of Root Respiration to Total Soil Respiration in a Leymus chinensis (Trin.) Tzvel. Grassland of Northeast China

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Contribution of Root Respiration to Total Soil Respiration in a Leymus chinensis (Trin.) Tzvel. Grassland of Northeast China

机译：羊草根系呼吸作用对土壤总呼吸作用的贡献东北草原

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机译：The loss of carbon through root respiration is an important component of grassland carbon budgets. However,few data are available concerning the contribution of root respiration to total soil respiration in grasslands in China. We investigated seasonal variations of soil respiration rate, root biomass, microbial biomass C and organic C content of the soil in a semi-arid Leymus chinensis (Trin.) Tzvel. grassland of northeast China during the 2002 growing season (from May to September). The linear regression relationship between soil respiration rate and root biomass was used to determine the contribution of root respiration to total soil respiration. Soil respiration rate ranged from 2.5 to 11.9 g C/m2 per d with the maximum in late June and minimum in September.The microbial biomass C and organic C content of the soil ranged from 0.3 to 1.5 g C/m2 and from 29 to 34 g C/kg respectively. Root biomass had two peaks, in early June (1.80 kg/m2) and mid-August (1.73 kg/m2). Root respiration rate peaked in mid-August (6.26 g C/m2 per d), whereas microbial respiration rate peaked in late June (7.43 g C/m2 per d). We estimated that the contribution of root respiration to total soil respiration during the growing season ranged from 38% to 76%.

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《植物学报（英文版）》 |2006年第4期|409-414|共6页
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作者单位

Department of Ecology College of Environmental Sciences Peking University Beijing 100871 China;

Key Laboratory for Vegetation Ecology of the Ministry of Education Northeast Normal University Changchun 130024 China;

Institutes of Biological Sciences University of Tsukuba Tsukuba Ibaraki 305-8572 Japan;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类植物学;
关键词
meadow steppe; root biomass; root respiration; soil organic carbon; soil respiration;

机译：草原草原根生物量;根呼吸土壤有机碳土壤呼吸;

Contribution of Root Respiration to Total Soil Respiration in a Leymus chinensis (Trin.) Tzvel. Grassland of Northeast China

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