Changes in Soil Microbial Community and Its Effect on Carbon Sequestration Following Afforestation on the Loess Plateau, China

文献类型: 外文期刊

第一作者: Xiang, Yun

作者: Xiang, Yun;Huang, Yimei;An, Shaoshan;Xiang, Yun;Cheng, Man;Huang, Yimei;An, Shaoshan;Cheng, Man;Darboux, Frederic

作者机构:

关键词: land-use change;C. korshinskii;carbon fraction;soil microbial community

期刊名称:INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH ( 影响因子:3.39; 五年影响因子:3.789 )

ISSN: 1660-4601

年卷期: 2017 年 14 卷 8 期

页码:

收录情况: SCI

摘要: Afforestation plays an important role in soil protection and ecological restoration. The objective of this study is to understand the effect of afforestation on soil carbon and soil microbial communities in the Loess Plateau of China. We measured two chemically-separated carbon fractions (i.e., humic acid, HA, and fulvic acid, FA) and soil microbial communities within shrublands (18-year-old Caragana korshinskii Kom (shrubland I) and 28-year-old Caragana korshinskii Kom (shrubland II)) and cropland. The size and structure of the soil microbial community was measured by phospholipid fatty acid (PLFA) analysis. The analysis of C-fractions indicated that at a depth of 0-20 cm, FA-C concentration in shrubland I and shrubland II were 1.7 times that of cropland, while HA-C had similar values across all three sites. Total PLFAs, G(+) (Gram positive) bacterial, G(-) (Gram negative) bacterial, and actinobacterial PLFAs were highest in shrubland II, followed by shrubland I and finally cropland. Fungal PLFAs were significantly higher in shrubland II compared to the other sites. Additionally, we found a high degree of synergy between main microbial groups (apart from fungi) with FA-C. We concluded that planting C. korshinskii in abandoned cropland could alter the size and structure of soil microbial community, with these changes being closely related to carbon sequestration and humus formation.

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