| 三江平原典型土地利用类型土壤呼吸强度
对温度的敏感性 |
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| 引用本文： | 廖 艳,崔 军,杨忠芳,夏学齐,赵秀芳.三江平原典型土地利用类型土壤呼吸强度
对温度的敏感性[J].地质通报,2012,31(1):164-171. |
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| 作者姓名： | 廖 艳 崔 军 杨忠芳 夏学齐 赵秀芳 |
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| 作者单位： | 1. 中国地质大学（北京）地球科学与资源学院，北京 100083；
2. 中国农业大学资源与环境学院，北京100193；
3. 新疆地勘局第六地质大队地质调查所，新疆 哈密 839000；
4. 山东省第七地质矿产勘查院，山东 临沂 276006 |
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| 基金项目： | 国土资源部公益性行业科研专项《中国主要农耕区土壤碳库与固碳潜力研究》(编号:200911020);中国地质调查局项目《中国典型地区土壤碳汇源转化机理研究》(编号:水[2010]03-07-07) |
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| 摘 要： | 采用实验室恒温培养方法对三江平原3种不同土地利用类型开发后的沼泽土和草甸土进行了温度敏感性研究。研究结果表明，在5℃、15℃、25℃和35℃ 4种不同温度条件下，各土壤类型的土壤呼吸速率均随温度的升高而增大。在同一温度条件下，3种土壤呼吸强度由弱到强依次是：草甸土-旱地<草甸土-水田<沼泽土-人工林。指数模型和乘幂模型均可以较好地描述沼泽土和草甸土土壤呼吸与温度之间的关系，土壤呼吸强度随温度的升高呈指数或乘幂上升。3种土壤的Q10值呈现出随温度升高而降低的趋势，表明土壤呼吸在较低温度下的温度敏感性更高。对未添加植物残体的纯土壤组和添加了植物残体的对照组进行对比研究，发现添加植物残体后土壤呼吸强度大大增强，因此野外实际的土壤呼吸强度要比通常室内实验中去除植物残体后所测定的土壤呼吸强度更高。
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| 关 键 词： | 三江平原 土壤呼吸 温度敏感性系数 |
Temperature sensitivity of soil respiration from the typical land-use types in the Sanjiang Plain, northeastern Heilongjiang Province |
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| LIAO Yan,CUI Jun,YANG Zhong-fang,XIA Xue-qi,ZHAO Xiu-fang.Temperature sensitivity of soil respiration from the typical land-use types in the Sanjiang Plain, northeastern Heilongjiang Province[J].Geologcal Bulletin OF China,2012,31(1):164-171. |
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| Authors: | LIAO Yan CUI Jun YANG Zhong-fang XIA Xue-qi ZHAO Xiu-fang |
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| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083,China;
2. College of Environmental Sciences, China Agricultural University, Beijing 100193, China;
3. The Geological Survey of the Sixth Geological Team, Bureau of Geological Exploration and Development of Xinjiang,
Hami 839000, Xinjiang, China;
4. Seventh Institute of Geology and Mineral Exploration, Linyi 276006, Shandong, China |
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| Abstract: | Temperature sensitivity of soil respiration of the samples from different land-use types in the Sanjiang Plain was studied using the laboratory incubation method.The results show that,at four different temperature conditions of 5 ℃,15 ℃,25 ℃ and 35 ℃,soil respiration rates of all the soil types increase with the increasing temperature.Under the same temperature condition,the three types of soils are in order of increasing respiration intensities of meadow soil-dry land < meadow soil-paddy field < bog soil-plantation.Both of the exponential model and the power model can be used to describe the relationship between soil respiration and temperature of the soils,which means that soil respiration intensity increases exponentially or as power function with the increasing temperature.The Q10 values of the three kinds of soils show a trend of decreasing with increasing temperature,which suggests that the temperature sensitivity of soil respiration is higher at the lower temperature.By the comparative incubation experiments on the pure soil without plant residues and the control group with plant residues,the authors found that soil respiration is greatly enhanced with additional plant residues,so the actual soil respiration in the field is higher than that measured in the laboratory in which plant residues are usually removed. |
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| Keywords: | Sanjiang Plain soil respiration temperature sensitivity coefficient |
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