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| 黄土高原不同侵蚀区生物结皮土壤CO2通量日动态特征及其温度敏感性 | |
| 引用本文： | 王爱国,赵允格,许明祥,王一贺,杨丽娜,明姣.黄土高原不同侵蚀区生物结皮土壤CO2通量日动态特征及其温度敏感性[J].环境科学学报,2013,33(9):2605-2611. |
| 作者姓名： | 王爱国 赵允格 许明祥 王一贺 杨丽娜 明姣 |
| 作者单位： | 1. 西北农林科技大学林学院,杨凌712100;西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌712100 2. 西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌712100 3. 西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌712100;中国科学院大学,北京100049 |
| 基金项目： | 国家自然科学基金项目，中国科学院战略性先导科技专项，中国科学院知识创新工程重要方向性项目，the National Natural Science Foundation of China，the Strategic Priority Research Program of the Chinese Academy of Sciences，the Knowledge Innovation Program of Chinese Academy of Sciences |
| 摘 要： | 利用LI-8100土壤碳通量自动观测系统监测了黄土高原不同侵蚀区(水蚀区、水蚀风蚀交错区、风蚀区)生物结皮土壤CO2通量的日变化,分析了土壤呼吸的温度敏感性.结果表明:以去除生物结皮为对照,具有生理活性的生物结皮降低了土壤CO2通量,其中,水蚀区、交错区和风蚀区土壤日平均CO2通量分别降低了5.0％、8.9％和20.5％.水蚀区、交错区和风蚀区生物结皮土壤CO2通量日动态均呈单峰型曲线,峰值出现在12:00-14:00左右,大小分别为1.64、1.64和1.37 μmol·m-2·s-1,但日变化幅度差异明显.土壤呼吸速率随温度的升高呈上升趋势,指数函数能够较好地描述二者的关系.生物结皮土壤呼吸的温度敏感性指数Q10在空间尺度上存在一定变异,其中,水蚀区、交错区Q10值变化范围为1.93～ 2.43,而风蚀区Q10值变化范围为4.80～ 5.56,说明风蚀区生物结皮土壤呼吸对温度的敏感性大于水蚀区和交错区.本研究表明,在探求黄土高原地区土壤碳交换时,应当考虑生物结皮的影响及不同侵蚀区生物结皮土壤CO2通量的差异性. |
| 关 键 词： | 生物结皮 土壤CO2通量 温度敏感性 Q10 侵蚀区 |
| 收稿时间： | 2012/12/12 0:00:00 |
| 修稿时间： | 2013/3/20 0:00:00 |
Diurnal dynamic characteristics and temperature sensitivity of soil CO2 flux of biocrusts in different erosion regions on the Loess Plateau |
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| WANG Aiguo,ZHAO Yunge,XU Mingxiang,WANG Yihe,YANG Lina and MING Jiao.Diurnal dynamic characteristics and temperature sensitivity of soil CO2 flux of biocrusts in different erosion regions on the Loess Plateau[J].Acta Scientiae Circumstantiae,2013,33(9):2605-2611. | |
| Authors: | WANG Aiguo ZHAO Yunge XU Mingxiang WANG Yihe YANG Lina and MING Jiao |
| Institution: | 1. College of Forest, Northwest A&F University, Yangling 712100;2. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;1. College of Forest, Northwest A&F University, Yangling 712100;2. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;1. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;2. University of Chinese Academy of Sciences, Beijing 100049;1. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;2. University of Chinese Academy of Sciences, Beijing 100049;1. State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100;2. University of Chinese Academy of Sciences, Beijing 100049 |
| Abstract: | |
| Keywords: | biocrusts soil CO2 flux temperature sensitivity Q10 erosion region |
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