| 引用本文: | 时伟宇,张建国,闫美杰,关晋宏,杜盛.2012.黄土高原半干旱区侧柏林群落土壤呼吸日变化及季节动态变化特征[J].地球环境学报,(6):1144-1148 |
| SHI Wei-yu,ZHANG Jian-guo,YAN Mei-jie,GUAN Jin-hong,DU Sheng.2012.Diurnal and seasonal dynamics of soil respiration in a Platycladus orientalis forest stand on the semiarid Loess Plateau, China[J].Journal of Earth Environment,(6):1144-1148 |
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| DOI：10.7515/JEE201206004 |
| CSTR： |
| 分类号:S154 |
| 基金项目:2012-09-18 |
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| Diurnal and seasonal dynamics of soil respiration in a Platycladus orientalis forest stand on the semiarid Loess Plateau, China |
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SHI Wei-yu1, ZHANG Jian-guo2,4, YAN Mei-jie2,3, GUAN Jin-hong2,4, DU Sheng2
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1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi′an 710075, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; 4.University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Forest ecosystems on China′s Loess Plateau are receiving increasing attention because of their special importance in carbon fixation and conservation of soil and water in the region. Soil respiration was investigated in Platycladus orientalis forest stands of the region at diurnal and seasonal scales. The daily and seasonal average values of soil respiration were 2.53 μmol·m-2·s-1 and 3.78 μmol·m-2·s-1, respectively. On a diurnal and seasonal scale, the variations of soil respiration in the P. orientalis forest show a one-peak pattern. The diurnal dynamics of soil respiration were mainly driven by soil temperature. However, the relationship between soil respiration and soil temperature was not significant, mainly because of the hysteresis effect of soil respiration on soil temperature. Soil moisture plays another dominant role in the ecosystem carbon balance, but was not affected by soil temperature in P. orientalis forest on the semiarid Loess Plateau. |
| Key words: Loess Plateau Platycladus orientalis semiarid soil respiration |
