Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1866-6280 |
EISSN | 1866-6299 |
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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