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长江源区不同植被覆盖下土壤水分对降水的响应

ISSN号：1000-0240
期刊名称：冰川冻土
时间：0
页码：329-337
语言：中文
分类：X13[环境科学与工程—环境科学]
作者机构：[1]College of Earth and Environment Sciences, Lanzhou University, Lanzhou 730000, China, [2]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China, [3]Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
相关基金：Supported by the National Natural Science Foundation of China （Grant No. 90511003） and the Hundred Talent Scholar Foundation, Chinese Academy of Sciences （2004）
相关项目：长江黄河源区高寒生态系统对全球气候变化的响应及其水文效应

关键词：青藏高原, 沼泽草甸, 高山草甸, 生长季节, 二氧化碳, 释放量, 降解, Qinghai-Tibet Plateau, Fenghuoshan, swamp meadow, alpine meadow, CO2, emission flux, degradation

中文摘要：

生态系统，沼泽地草地和高山的草地的二种类型的 CO_2 排放流动，在 Qinghai 西藏的 Fenghuo-shan 区域，高原被静态的房间便携式计算机学习红外线的 ehro-matographic 方法。结果证明在在二个生态系统之间的 CO_2 排放流动并且在不同降级度的一样的生态系统有大差别。沼泽地草地的 CO_2 排放流动逐渐地与增加降级度减少了，当高山的草地的逐渐地与除了在 5 月，增加降级度增加了时。波形的分级的沼泽地草地的 CO_2 排放流动比波形的分级的高山的草地的高是 65.1%-80.3% ；并且中等降级的沼泽地草地的 CO_2 排放流动比高山的草地的高是 22.1%-67.5% ；但是严重地降级的高山的草地的 CO_2 排放流动比沼泽地草地的高是 14.3%-29.5% 。土壤潮湿内容和温度在上面 5 厘米土壤层并且未葬生物资源 ificantly 是 sig 与 CO_2 排放流动相关并且认为是主要环境因素控制 CO_2 排放。

英文摘要：

CO2 emission fluxes of two types of ecosystem, swamp meadow and alpine meadow, in the Fenghuoshan region of the Qinghai-Tibet Plateau were studied by the static chamber-portable infrared chro- matographic method. The results showed that there was large difference in the CO2 emission fluxes between the two ecosystems and in the same ecosystem of different degradation degrees. CO2 emission flux of the swamp meadow gradually decreased with increasing degradation degree, while that of the alpine meadow gradually increased with increasing degradation degree except in May. The CO2 emission flux of undegraded swamp meadow was 65.1%--80.3% higher than that of undegraded alpine meadow; and the CO2 emission flux of moderately degraded swamp meadow was 22.1%--67.5% higher than that of alpine meadow; but the CO2 emission flux of severely degraded alpine meadow was 14.3%--29.5% higher than that of swamp meadow. The soil moisture content and temperature in the upper 5 cm soil layer and above-ground biomass were significantly correlated with the CO2 emission fluxes and regarded as the main environment factors to control the CO2 emission.

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