| 湿润亚热带典型白云岩区不同土地利用的土壤CO2浓度特征及其影响因素 |
| |
| 引用本文： | 代林玉,肖时珍,曾成,闫伟,肖华,邰治钦.湿润亚热带典型白云岩区不同土地利用的土壤CO2浓度特征及其影响因素[J].中国岩溶,2021,40(4):617-624. |
| |
| 作者姓名： | 代林玉 肖时珍 曾成 闫伟 肖华 邰治钦 |
| |
| 作者单位： | 1.贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心/中国科学院地球化学研究所环境地球化学国家重点实验室 |
| |
| 基金项目： | 国家自然科学基金“施秉典型白云岩流域的岩溶碳汇通量及其土地利用控制”(41673129)； 国家重点研发计划项目子课题“喀斯特石漠化防治与世界遗产保护及山地旅游产业技术与示范”[2016YFC0502606—01]； 贵州师范大学资助博士科研项目“贵州施秉白云岩喀斯特石漠化地区土壤侵蚀机理研究”(GZNUD[2017]12号) |
| |
| 摘 要： | 以中国南方岩溶施秉世界自然遗产地杉木河流域的子流域——黄洲河岩溶小流域为研究区，对3种不同利用方式土地（林地、旱地、水田）中的土壤CO2浓度进行为期一年的观测，并采集土壤样品，分析其理化性质。结果显示:（1）不同土地利用方式下土壤CO2的年平均浓度为:水田（21 008×10-6）>林地（9 038×10-6）>旱地（5 660×10-6）；（2）一年中林地与旱地的土壤CO2月浓度曲线与月均气温曲线的变化形态具有相似性，年变化规律总体上表现一致:1-7月土壤CO2浓度逐渐升高，8月浓度达到峰值，分别为16 157×10-6和13 458×10-6；（3）水田土壤CO2浓度在1-3月逐渐下降，3月出现最低值11 727×10-6，3-12月逐渐升高，8月开始波动升高，在10月达到峰值（29 993×10-6）；（4）白云岩区土壤CO2浓度有显著的季节变化规律（夏秋高、冬春低）；（5）气温、降雨对林地和旱地土壤CO2浓度有显著影响，而对水田土壤CO2浓度影响不显著；（6）土壤有机碳含量的差异对土壤CO2浓度有一定影响，且土壤pH增高，其土壤CO2浓度也随之增大。
|
| 关 键 词： | 白云岩 土壤CO2浓度 岩溶碳汇 碳循环 施秉 |
Characteristics and influencing factors of soil CO2 release under different land use types in the typical dolomite area of humid subtropical regions |
| |
| DAI Linyu,XIAO Shizhen,ZENG Cheng,YAN Wei,XIAO Hu,TAI Zhiqin.Characteristics and influencing factors of soil CO2 release under different land use types in the typical dolomite area of humid subtropical regions[J].Carsologica Sinica,2021,40(4):617-624. |
| |
| Authors: | DAI Linyu XIAO Shizhen ZENG Cheng YAN Wei XIAO Hu TAI Zhiqin |
| |
| Institution: | 1.School of Karst Science， Guizhou Normal University / State Engineering Technology Institute for Karst Desertification Control/State Key Laboratory of Environmental Geochemistry， Institute of Geochemistry， CAS2.School of Karst Science， Guizhou Normal University / State Engineering Technology Institute for Karst Desertification Control3.State Key Laboratory of Environmental Geochemistry， Institute of Geochemistry， CAS |
| |
| Abstract: | To further reveal the law of karst carbon cycle，as well as understand the characteristics and influencing factors of soil CO2 release in different land use types in the dolomites in the Huangzhouhe basin，which is the sub-basin of the Shanmuhe basin， a world natural heritage site in karst area， Shibing， southern China， in this study，the soil CO2 concentration in three different land use types （forest land， dryland， paddy field）were measured for one year.Soil samples were collected to analyze their physical and chemical properties. The results show that，（1） The annual average soil CO2 concentration in different land use types is， paddy field（21，008×10-6）> forest land（9，038×10-6）> dryland（5，660×10-6）；（2） The variation patterns of monthly soil CO2 concentration curve and monthly mean air temperature change curve of forestland and dryland in a year were similar，and annual variation law was generally consistent.The soil CO2 concentration gradually increased from January to July， and reached the peak value in August ，which was 16，157×10-6 and 13，458×10-6， respectively；（3） The CO2 concentration in paddy soil gradually decreased from January to March ， and the lowest value in March is 11，727×10-6， it gradually increased from March to December， and began to fluctuating increase in August， and reached a peak of 29，993×10-6 in October；（4） The soil CO2 concentration in dolomite area has a significant seasonal variation law of high in summer and autumn and low in spring；（5） Air temperature and rainfall have significant effects on CO2 concentration of forest land and dryland soil， but have no significant effect on the CO2 concentration of paddy field ；（6） The correlation coefficient of soil CO2 concentration corresponding to the difference of its organic carbon content is R=0.70 （P=0.03）， indicating that the difference of soil organic carbon has certain impacts on soil CO2 concentration， and the soil CO2 concentration increases with the increase of soil pH value. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国岩溶》浏览原始摘要信息 |
| 点击此处可从《中国岩溶》下载免费的PDF全文 |
