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Land use change from upland to paddy field in Mollisols drives soil aggregation and associated microbial communities

文献类型： 外文期刊

作者： Li, Xin 1 ; Zhang, Huihui 1 ; Sun, Minglong 3 ; Xu, Nan 4 ; Sun, Guangyu 5 ; Zhao, Meichun 5 ;

作者机构： 1.Northeast Agr Univ, Coll Resources & Environm, Harbin 150030, Heilongjiang, Peoples R China

2.Northeast Forestry Univ, Sch Forestry, Harbin 150040, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Crop Breeding, Harbin 150040, Heilongjiang, Peoples R China

4.Heilongjiang Acad Sci, Nat Resources & Ecol Inst, Harbin 150040, Heilongjiang, Peoples R China

5.Northeast Forestry Univ, Coll Life Sci, Harbin 150040, Heilongjiang, Peoples R China

6.Northeast Forestry Univ, Minist Educ, Key Lab Saline Alkali Vegetat Ecol Restorat, Harbin 150040, Heilongjiang, Peoples R China

关键词： Soil aggregates; Upland; Paddy land; Land use change; Microbial community

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN： 0929-1393

年卷期： 2020 年 146 卷

页码：

收录情况： SCI

摘要： Irrigated rice fields in northeast China are established on soils characterized as upland soils, and in this process, oxic upland conditions are converted into anoxic wetland conditions. However, the consequences of such land use changes for soil aggregation and associated microbial communities are poorly understood. Therefore, the objective was to study the activity and structure of the microbial communities of soils from a permanent upland as well as paddy soils converted from upland fields, soil microbial communities were determined using Biolog EcoPlates (TM) and HiSeq. The results showed that the conversion of upland to paddy soil resulted in increased soil organic carbon (SOC) contents and decreased urease, beta-glucosidase, and cellulose activities, while SOC and total nitrogen (TN) contents decreased with decreasing aggregate size for both land use types. Following land use change, microbial diversity was increased and microbial community activity and composition were changed. When upland fields were converted into paddy systems, the relative abundances of Bacteroidetes, Chloroflexi, and Nitrospirae increased, whereas those of Acidobacteria, Gemmatimonadetes, and Planctomycetes decreased significantly. Most importantly our results indicated that the microbial community is modulated by soil aggregate sizes and land use change, and latter is a stronger determinant in shaping soil microbial communities.

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