干旱区生态环境知识资源中心(Arid): 贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究

Arid

	贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究
其他题名	Vertical Distribution of Soil Carbonate Concentration and the Carbon Isotopic Composition in Typical Soil Profiles from Guizhou Karst Areas,Southwest China
	李龙波; 张兴勇; 蔡大为
来源期刊	地球与环境
ISSN	1672-9250
出版年	2021
卷号	49 期号:4 页码:409-415
中文摘要	以贵州为中心的西南喀斯特地区的石漠化是我国实施西部大开发战略中所面临的根本性地域环境问题之一,喀斯特地区石漠化是一种与脆弱生态背景和人类活动相关联的土地退化过程,而土壤退化是土地退化的核心部分。本研究采集了贵州喀斯特地区的砂岩黄壤剖面和石灰土剖面的土壤样品,测定了剖面样品的土壤有机碳含量、土壤碳酸盐含量和土壤碳酸盐delta~(13)C。结果表明,砂岩黄壤和石灰土碳酸盐含量在剖面上的分布存在差异,黑色石灰土碳酸盐含量在剖面上的总体变化均表现出从上到下逐渐减小的趋势,土壤碳酸盐含量主要集中在表层土壤,而黄色石灰土和砂岩黄壤碳酸盐含量在剖面上的变化不大。而且在砂岩黄壤和石灰土中,土壤碳酸盐delta~(13)C值在剖面深度上的变化情况不同,表明了土壤有机碳向无机碳转化的程度,不同的成土过程及程度和成土环境的差异可能是砂岩黄壤和石灰土中土壤碳酸盐delta~(13)C值组成差异的主要原因。本研究提高了对区域碳库特征的认识,为喀斯特生态系统土壤有机质的生物地球化学循环研究提供了理论支撑。
英文摘要	Rocky desertification in the karst region of Southwest China with Guizhou Province as the center is one of the fundamental regional environmental problems faced by China in the implementation of the western development strategy. Rocky desertification in karst area is a land degradation process associated with fragile ecological background and human activities,and soil degradation is the core part of land degradation. In this study,soil samples from sandstone yellow soil profile and calcareous soil profile in Guizhou karst area were collected. The soil organic carbon content,soil carbonate content and its delta~(13)C of the profile samples were measured. The results showed that the distribution of carbonate in sandstone yellow soil and calcareous soil was different. The overall change of carbonate content in black limestone soil decreased gradually from top to bottom. While,for yellow limestone soil,carbonate mainly concentrated in surface soil,and little change was found for sandstone yellow soil. In addition,the variation of delta~(13)C in sandstone yellow soil and calcareous soil is different,which indicates the degree of transformation from organic carbon to inorganic carbon. The difference of soil forming process and degree,soil forming environment may be the main reason for the difference of delta~(13)C composition between sandstone yellow soil and calcareous soil. This study improves the understanding of regional carbon pool characteristics and provides theoretical support for the study of biogeochemical cycle of soil organic matter in karst ecosystem.
中文关键词	贵州 ; 喀斯特地区 ; 土壤碳酸盐 ; 碳同位素
英文关键词	Guizhou karst area soil carbonate carbon isotope
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7031587
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377582
作者单位	李龙波, 贵州省地质环境监测院;;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, 贵阳;;贵阳, ;; 550081;;550081.; 张兴勇, 贵州大学, 喀斯特环境与地质灾害防治国土资源部重点实验室, 贵阳, 贵州 550025, 中国.; 蔡大为, 贵州省地质环境监测院, 贵阳, 贵州 550081, 中国.
推荐引用方式 GB/T 7714	李龙波,张兴勇,蔡大为. 贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究[J],2021,49(4):409-415.
APA	李龙波,张兴勇,&蔡大为.(2021).贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究.地球与环境,49(4),409-415.
MLA	李龙波,et al."贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究".地球与环境 49.4(2021):409-415.