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
作者： Xiang, Yun 1 ; Cheng, Man 3 ; Huang, Yimei 1 ; An, Shaoshan 1 ; Darboux, Frederic 5 ;
作者机构： 1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Peoples R China
2.Shanxi Res Acad Environm Sci, Taiyuan 030000, Shanxi, Peoples R China
3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China
4.Shanxi Acad Agr Sci, Inst Agr Environm & Resource, Taiyuan 030000, Shanxi, Peoples R China
5.Ctr Rech Orleans, UR Sci Sol, UR 0272, French Natl Inst Agr Res INRA, CS 40001, F-45075 Orleans 2, France
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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