Arid
DOI10.1007/s12665-017-6684-8
Changes in soil organic carbon and its active fractions in different desertification stages of alpine-cold grassland in the eastern Qinghai-Tibet Plateau
Hu, Yu-Fu; Jiang, Shuang-Long; Yuan, Shu; Deng, Liang-Ji; Xiao, Hai-Hua; Shu, Xiang-Yang; Chen, Guang-Deng; Xia, Jian-Guo
通讯作者Hu, Yu-Fu
来源期刊ENVIRONMENTAL EARTH SCIENCES
ISSN1866-6280
EISSN1866-6299
出版年2017
卷号76期号:9
英文摘要

In recent years, the desertification of alpine-cold grasslands has become increasingly serious in the Qinghai-Tibet Plateau in China, but it has not received the same amount of attention as has desertification in (semi) arid areas. Little is thus known about the change in soil organic carbon (SOC) during alpine-cold grassland desertification. To quantify the impacts of desertification on vegetation, SOC and its active fractions in alpine-cold grasslands, areas of light desertified grassland, medium desertified grassland, heavy desertified grassland, serious desertified grassland, and nondesertified grassland were selected as experimental sites in the eastern Qinghai-Tibet Plateau in China. The species number, height and coverage of vegetation were surveyed, and the soil particle fractions, SOC and SOC active fractions (including dissolved organic carbon (DOC), microbial biomass carbon (MBC), and labile organic carbon (LOC) were measured to a depth of 0-100 cm. The results showed that alpine-cold grassland desertification resulted in a significant reduction in vegetation cover, plant biomass, fine soil particles, SOC, DOC, LOC and MBC. The decreases in DOC, LOC and MBC were more rapid and apparent than were those in SOC, and the decrease in MBC was the most obvious among them. The rates of reduction in SOC concentrations accelerated as desertification progressed; most of the SOC was lost in the middle and later desertification stages, with lower losses during early desertification. The results indicate that active SOC fractions, particularly MBC, are more sensitive to desertification and can be used as sensitive indicators of desertification. Efforts to limit desertification and reduce SOC loss in alpine-cold grasslands should focus on early desertification stages and adopt strategies to prevent overgrazing and control the erosion of soil by wind.


英文关键词Alpine-cold grassland Desertification Microbial biomass carbon Soil organic carbon Qinghai-Tibet Plateau
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000401323600020
WOS关键词NORTHERN CHINA ; WIND EROSION ; MICROBIAL BIOMASS ; SANDY FARMLAND ; INNER-MONGOLIA ; N CONTENT ; MATTER ; LABILE ; ACCUMULATION ; SENSITIVITY
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198660
作者单位Sichuan Agr Univ, Coll Resources Sci & Technol, Chengdu 611130, Peoples R China
推荐引用方式
GB/T 7714
Hu, Yu-Fu,Jiang, Shuang-Long,Yuan, Shu,et al. Changes in soil organic carbon and its active fractions in different desertification stages of alpine-cold grassland in the eastern Qinghai-Tibet Plateau[J],2017,76(9).
APA Hu, Yu-Fu.,Jiang, Shuang-Long.,Yuan, Shu.,Deng, Liang-Ji.,Xiao, Hai-Hua.,...&Xia, Jian-Guo.(2017).Changes in soil organic carbon and its active fractions in different desertification stages of alpine-cold grassland in the eastern Qinghai-Tibet Plateau.ENVIRONMENTAL EARTH SCIENCES,76(9).
MLA Hu, Yu-Fu,et al."Changes in soil organic carbon and its active fractions in different desertification stages of alpine-cold grassland in the eastern Qinghai-Tibet Plateau".ENVIRONMENTAL EARTH SCIENCES 76.9(2017).
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