干旱区生态环境知识资源中心(Arid): Vertical distribution and storage of soil organic and inorganic carbon in a typical inland river basin, Northwest China

Arid

	Vertical distribution and storage of soil organic and inorganic carbon in a typical inland river basin, Northwest China
	Yang Fan; Huang Laiming; Yang Renmin; Yang Fei; Li Decheng; Zhao Yuguo; Yang Jinling; Liu Feng; Zhang Ganlin
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:2 页码:183-201
英文摘要	Knowledge of soil carbon (C) distribution and its relationship with the environment can improve our understanding of its biogeochemical cycling and help to establish sound regional models of C cycling. However, such knowledge is limited in environments with complex landscape configurations. In this study, we investigated the vertical distribution and storage of soil organic carbon (SOC) and soil inorganic carbon (SIC) in the 10 representative landscapes (alpine meadow, subalpine shrub and meadow, mountain grassland, mountain forest, typical steppe, desert steppe, Hexi Corridor oases cropland, Ruoshui River delta desert, Alxa Gobi desert, and sandy desert) with contrasting bioclimatic regimes in the Heihe River Basin, Northwest China. We also measured the 87Sr/86Sr ratio in soil carbonate to understand the sources of SIC because the ratio can be used as a proxy in calculating the contribution of pedogenic inorganic carbon (PIC) to total SIC. Our results showed that SOC contents generally decreased with increasing soil depth in all landscapes, while SIC contents exhibited more complicated variations along soil profiles in relation to pedogenic processes and parent materials at the various landscapes. There were significant differences of C stocks in the top meter among different landscapes, with SOC storage ranging from 0.82 kg C/m~2 in sandy desert to 50.48 kg C/m~2 in mountain forest and SIC storage ranging from 0.19 kg C/m~2 in alpine meadow to 21.91 kg C/m~2 in desert steppe. SIC contributed more than 75% of total C pool when SOC storage was lower than 10 kg C/m~2, and the proportion of PIC to SIC was greater than 70% as calculated from Sr isotopic ratio, suggesting the critical role of PIC in the C budget of this region. The considerable variations of SOC and SIC in different landscapes were attributed to different pedogenic environments resulted from contrasting climatic regimes, parent materials and vegetation types. This study provides an evidence for a general trade-off pattern between SOC and SIC, showing the compensatory effects of environmental conditions (especially climate) on SOC and SIC formation in these landscapes. This is largely attributed to the fact that the overall decrease in temperature and increase in precipitation from arid deserts to alpine mountains simultaneously facilitate the accumulation of SOC and depletion of SIC.
英文关键词	Heihe River Basin arid ecosystem soil landscape pedogenesis pedogenic carbonate SOC CaCO3
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6213606
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335932
作者单位	Yang Fan, Institute of Soil Science, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture;;, Nanjing;;, ;;Beijing 210008;;100049.; Zhao Yuguo, Institute of Soil Science, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture;;, Nanjing;;, ;;Beijing 210008;;100049.; Zhang Ganlin, Institute of Soil Science, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture;;, Nanjing;;, ;;Beijing 210008;;100049.; Huang Laiming, University of Chinese Academy of Sciences;;Institute of Geographic Sciences and Natural Resources Research, ;;Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, ;;, Beijing;;Beijing 100049;;100101.; Yang Renmin, Institute of Soil Science, Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture, Nanjing, Jia...
推荐引用方式 GB/T 7714	Yang Fan,Huang Laiming,Yang Renmin,et al. Vertical distribution and storage of soil organic and inorganic carbon in a typical inland river basin, Northwest China[J],2018,10(2):183-201.
APA	Yang Fan.,Huang Laiming.,Yang Renmin.,Yang Fei.,Li Decheng.,...&Zhang Ganlin.(2018).Vertical distribution and storage of soil organic and inorganic carbon in a typical inland river basin, Northwest China.Journal of Arid Land,10(2),183-201.
MLA	Yang Fan,et al."Vertical distribution and storage of soil organic and inorganic carbon in a typical inland river basin, Northwest China".Journal of Arid Land 10.2(2018):183-201.