| 长白山典型阔叶红松林土壤二氧化碳排放通量 |
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| 引用本文： | 王琛瑞,吴劼,梁战备,黄国宏.长白山典型阔叶红松林土壤二氧化碳排放通量[J].林业研究,2004,15(4):268-272. |
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| 作者姓名： | 王琛瑞 吴劼 梁战备 黄国宏 |
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| 作者单位： | 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,中国科学院沈阳应用生态研究所陆地生态过程重点实验室,内布拉斯加林肯大学,中国科学院沈阳应用生态研究所陆地生态过程重点实验室 沈阳110016,中国,沈阳110016,中国,林肯NE68583-0915,美国,沈阳110016,中国 |
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| 基金项目： | This research was supported by National Natural Science Foundation of China (Grant No. 40171092). |
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| 摘 要： | 随着大气CO2浓度的升高,主要由其引起的温室效应与对生物新陈代谢的影响变得越来越显著。森林生态系统在全球碳循环中扮演着重要的角色。为了评估和理解森林土壤CO2通量及其随空气和土壤温度的季节和昼夜变化规律,我们在长白山北坡典型阔叶红松林内利用静态箱技术进行了原位观测。实验在整个生长季(6月初至9月末)昼夜进行,利用气相色谱进行气体分析。结果表明: 长白山阔叶红松林土壤是大气二氧化碳源,其CO2通量具有明显的季节和昼夜变化规律。通量的变化范围是(0.30-2.42)μmol穖-2穝-1,平均值为0.98μmol穖-2穝-1。土壤CO2排放的季节规律表明,土壤CO2通量的变化与气温和土壤温度的变化有关。CO2平均通量的最大值出现在7月((1.27±23%)μmol穖-2穝-1),最小值出现在9月((0.5±28%)μmol穖-2穝-1)。土壤CO2的昼夜波动与土壤温度变化有关,而在时间上滞后于温度的变化。森林下垫面土壤CO2通量与土壤温度显著相关,与6cm深度土层温度相关系数最大。基于气温和土壤温度计算的Q10值范围为2.09-3.40。图2表3参37。
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| 关 键 词： | 长白山 土壤二氧化碳排放通量 阔叶红松林 全球气候变化 温室效应 土壤温度 气温 |
| 收稿时间： | 18 October 2004 |
Soil carbon dioxide fluxes of a typical broad-leaved/Korean pine mixed forest in Changbai Mountain,China |
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| Wang?Chen-ruiEmail author,Wu?Jie,Liang?Zhan-bei,Huang?Guo-hong.Soil carbon dioxide fluxes of a typical broad-leaved/Korean pine mixed forest in Changbai Mountain,China[J].Journal of Forestry Research,2004,15(4):268-272. |
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| Authors: | Email author" target="_blank">Wang?Chen-ruiEmail author Wu?Jie Liang?Zhan-bei Huang?Guo-hong |
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| Institution: | (1) Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, 110016 Shenyang, P. R. China;(2) Department of Agronomy and Horticulture, University of Nebraska, 68583-0915 Lincoln, Lincoln NE, USA |
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| Abstract: | The forest ecosystem plays an important role in the global carbon cycling. A study was conducted to evaluate soil CO2 flux and its seasonal and diurnal variation with the air and soil temperatures by using static closed chamber technique in
a typical broad-leaved/Korean pine mixed forest area on the northern slope of Changbai Mountain, Jilin Province, China. The
experiment was carried out through the day and night in the growing season (from June to September) in situ and sample gas
was analyzed by a gas Chromatograph. Results showed that the forest floor was a large net source of carbon, and soil CO2 fluxes had an obvious law of seasonal and diel variation. The soil CO2 flux of broad-leaved/Korean pine mixed forest was in the range of 0.30–2.42 μmol·m-2·s-1 with the mean value of 0.98 μmol·m-2· s-1. An examination on the seasonal pattern of soil CO2 emission suggested that the variability in soil CO2 flux could be correlated with variations in soil temperature, and the maximum of mean CO2 flux occurred in July ((1.27±23%) μmol·m-2·s-1) and the minimum was in September ((0.50±28%) μmol·m-2·s-1). The fluctuations in diel soil CO2 flux were also correlated with changes in soil temperature; however, there existed a factor for a time lag. Soil CO2 flux from the forest floor was strongly related to soil temperature and had the highest correlation with temperature at 6-cm
depth of soil. Q10 values based on air temperature and soil temperature of different soil depths were at the ranges of 2.09–3.40.
Foundation Item: This research was supported by National Natural Science Foundation of China (Grant No. 40171092). |
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| Keywords: | Soil CO2 flux Broad-leaved/Korean pine mixed forest Q10 value Changbai Mountain |
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