| 长白山白桦林地土壤呼吸的季节变化 |
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| 引用本文： | 刘颖,韩士杰,林鹿. 长白山白桦林地土壤呼吸的季节变化[J]. 林业研究, 2009, 20(4): 367-371. DOI: 10.1007/s11676-009-0062-7 |
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| 作者姓名： | 刘颖 韩士杰 林鹿 |
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| 作者单位： | 制浆造纸工程国家重点实验室,华南理工大学轻工与食品学院,广州,510640;中国中国科学院沈阳应用生态研究所,沈阳,110016;中国中国科学院沈阳应用生态研究所,沈阳,110016;制浆造纸工程国家重点实验室,华南理工大学轻工与食品学院,广州,510640 |
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| 摘 要： | 2004年5月至9月,研究了长白山白桦林土壤呼吸以及根系呼吸对土壤呼吸的贡献随土壤温度和土壤湿度的季节变化,研究结果表明：土壤总呼吸、断根土壤呼吸和根系呼吸在生长季内有相似的季节变化趋势,夏季潮湿而且温度较高,呼吸速率也较高,春季和秋季温度较低,呼吸速率也较低。2004年5月至9月,土壤总呼吸、断根土壤呼吸和根系呼吸的平均值分别为4.44,2.30和2.14μmol·m^-2s^-1,三者与土壤温度均呈指数相关,与土壤湿度呈线性相关,三者的Q10值分别为2.82,2.59和3.16,这与其他学者的结果相似。根系呼吸是土壤呼吸的一个重要组成部分,2004年5月至9月,根系呼吸对土壤总呼吸的贡献在29.3～58.7%之间。根据Q10模型估算的土壤总呼吸、断根土壤呼吸和根系呼吸的全年平均值分别为1.96、1.08和0.87μmol·m^-2s^-1,即741.73、408.71和329.24gC·m^-2·a^-1,全年根系对土壤总呼吸的贡献为44.4%。土壤呼吸和土壤温度之间的关系模型是了解和预测长白山白桦林生态系统潜在的随森林管理和气候变化而变化的有用工具。
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| 关 键 词： | 土壤呼吸 根呼吸 土壤温度 土壤含水量 季节变化 |
| 收稿时间： | 2005-12-20 |
Seasonal changes of soil respiration in Betula platyphylla forest in Changbai Mountain, China |
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| Ying Liu,Shi-jie Han,Lu Lin. Seasonal changes of soil respiration in Betula platyphylla forest in Changbai Mountain, China[J]. Journal of Forestry Research, 2009, 20(4): 367-371. DOI: 10.1007/s11676-009-0062-7 |
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| Authors: | Ying Liu Shi-jie Han Lu Lin |
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| Affiliation: | (1) School of Urban and Environmental Sciences, Northeast Normal University, Jilin, 130024, China;(2) Department of Ecology, College of Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, 100871, China;(3) Key Laboratory for Vegetation Ecology of the Ministry of Education, Northeast Normal University, Jilin, 130024, China;(4) Institute of Biological Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan |
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| Abstract: | A stdudy was conducted to determine the seasonal changes of soil respiration and the contribution of root respiration to soil respiration in Betula platyphylla forest in Changbai Mountain from May to September in 2004. Results indicated that the total soil respiration, root-severed soil respiration and the root respiration followed a similar seasonal trend, with a high rate in summer due to wet and high temperature and a low rate in spring and autumn due to lower temperature. The mean rates of total soil respiration, root-severed soil respiration and root respiration were 4.44, 2.30 and 2.14 μmol·m−2·s−1, respectively during the growing season, and they were all exponentially correlated with temperature. Soil respiration rate had a linear correlation with soil volumetric moisture. The Q10 values for total soil respiration, root-severed soil respiration and root respiration were 2.82, 2.59 and 3.16, respectively. The contribution rate of root respiration to the total soil respiration was between 29.3% and 58.7% during the growing season, indicating that root is a major component of soil respiration. The annual mean rates of total soil respiration, root-severed soil respiration and root respiration were 1.96, 1.08, and 0.87 μmol·m−2·s−1, or 741.73, 408.71, and 329.24 g·m−2·a−1, respectively. Root respiration contributed 44.4% to the annual total soil respiration. The relationship proposed for soil respiration with soil temperature was useful for understanding and predicting potential changes in Changbai Mountain B. platyphylla forest ecosystem in response to forest management and climate change. |
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| Keywords: | root respiration seasonal variations soil respiration soil temperature soil water content |
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