亚高山表层岩溶泉域土壤溶蚀速率季节变化及碳汇量估算——以重庆金佛山水房泉流域为例

罗健; 蒋勇军; 胡毅军; 李林立; 刘文

doi:10.3969/j.issn.1001-4810.2011.04.015

亚高山表层岩溶泉域土壤溶蚀速率季节变化及碳汇量估算——以重庆金佛山水房泉流域为例

doi: 10.3969/j.issn.1001-4810.2011.04.015

1.
西南大学地理科学学院
2.
西南大学地理科学学院；西南大学岩溶环境与石漠化治理研究所；三峡库区生态环境教育部重点实验室

基金项目: 国家自然科学基金(41172331和41040026)、中央高校基本科研业务费支项资金(XDJK201113003)、国土资源部地质调查项目(1212011087119)、国土资源部公益性行业科研专项(201111022)、国土资源部岩溶动力学重点实验室开放课题(KDL2011-01)、西南大学博士基金(SWU109050)、西南大学自然地理博士点开放基金(250-411111)

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出版历程
- 收稿日期: 2011-11-24
- 发布日期: 2011-12-25

Seasonal changes of soil dissolution rate and estimations on carbon sequestration in the subalpine epikarst spring zone：A case study in the Shuifang Spring in Jinfoshan, Chongqing

1.
School of Geographical Sciences, Southwest University
2.
School of Geographical Sciences, Southwest University；nstitute of Karst Environment and Rocky Desertification Control, Southwest University；Key Laboratory of Eco-Environments in Three Gorges Reservoir Region

摘要

摘要: 利用标准溶蚀试片法测定了重庆金佛山水房泉流域林地、草地和灌丛三种土地利用类型不同深度年溶蚀速率。结果表明,不同土地利用类型、不同季节、不同土壤深度的溶蚀速率具有很大的差异。通过对各土地利用类型下不同季节不同深度土壤有机质、土壤CO2浓度和土壤pH分析发现:土壤有机质和pH相互耦合共同对溶蚀速率产生影响,有机质含量越高,则pH值越低,溶蚀速率就越大;三种土地利用方式下土壤CO2浓度与溶蚀速率具有一定的相关性,夏秋季土壤CO2浓度较冬春季高,相对应地,其土下溶蚀速率也比冬春季大。最后利用试片溶蚀数据对泉域内年碳汇量进行了估算,结果约为:25.595t/a。
- 表层岩溶泉域 /
- 土地利用 /
- 溶蚀速率 /
- 碳汇估算
Abstract: Annual soil dissolution rates of carbonate under forestland, grassland and shrub land at different depth in the Shuifang Spring in Jinfoshan, Chongqing are tested by means of the standard limestone tablets. The results show that the karst erosion rates are quite different under different land-use types, in different seasons and at different depth of soil. Through analysis on soil organic matter, soil CO2 concentration and soil pH during different seasons and at different depth in forestland, grassland and shrub land, it is discovered firstly that the soil organic matter and pH coupled with each other to affect the dissolution rate of carbonate, and the higher the organism and the less the pH value, the higher the dissolution rate. And secondly, the soil CO2 concentration is of certain relations with the dissolution rate of carbonate, and the soil CO2 concentration in summer and autumn is higher than in winter and spring, so, the soil erosion rate in summer and autumn is higher than in winter and spring. Finally, an estimation on the carbon sequestration in the spring area is done by means of standard limestone tablets, the result is about 25.595 t/a.
- epikarst spring area /
- land use /
- dissolution rate of carbonate /
- carbon sequestration estimation

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