Aggregate-related changes in soil microbial communities under different ameliorant applications in saline-sodic soils
文献类型：期刊论文
| 作者 | S. S. Luo, S. J. Wang, L. Tian, S. H. Shi, S. Q. Xu, F. Yang, X. J. Li, Z. C. Wang and C. J. Tian |
| 刊名 | Geoderma
 |
| 出版日期 | 2018 |
| 卷号 | 329页码:108-117 |
| 通讯作者 | 王志春，田春杰 |
| 中文摘要 | Soil ameliorants can improve soil physico-chemical properties and activate microbial communities in saline-sodic soils. However, there has been less focus on how aggregate fractions affect soil microbial communities under different ameliorant applications. Here, we used the phospholipid fatty acid (PLFA) analysis to explore the effects of soil ameliorants on microbial communities within mega-aggregates (diameter of > 2 mm, ME), macro-aggregates (diameter of 0.25-2 mm, MA), and micro-aggregates (diameter of < 0.25 mm, MI), based on an 8-year rice (Oryza saliva L.) field experiment. The five treatments included CK, non-amended control; SS, amended with sandy soil; DG, amended with desulfurization gypsum; FM, amended with farm manure; and M, amended with a mixture of sandy soil, desulfurization gypsum, and farm manure. Relative to the CK treatment, the SS, DG, FM, and M treatments significantly decreased the soil pH and electrical conductivity and significantly increased the soil organic carbon (SOC) content of the MI, while the FM and M treatments also significantly improved the SOC content of the MA and ME. Irrespective of the ameliorant used, the absolute abundance of total PLFAs and most microbial groups generally varied with the SOC content as follows: MA > ME > MI. Meanwhile, the proportional abundance of arbuscular mycorrhizal fungi (AMF) varied between different aggregate fractions as follows: ME > MA > MI. Additionally, the DG treatment significantly enhanced the soil aggregate stability by increasing the AMF abundance, AMF/saprotrophic fungi ratio, and SOC content of the ML Furthermore, soil microbial groups were highly correlated with soil SOC (P < 0.001), C/N ratio (P < 0.001), pH (P < 0.01), total nitrogen (P < 0.01), and the proportion of aggregates with a > 0.25 mm diameter (P < 0.05). In conclusion, desulfurization gypsum is more effective for improving the properties of saline-sodic soils in the western Songnen Plain. |
| 源URL | [http://ir.iga.ac.cn/handle/131322/8756]  |
| 专题 | 东北地理与农业生态研究所_湿地生态系统管理学科组 |
| 推荐引用方式 GB/T 7714 | S. S. Luo, S. J. Wang, L. Tian, S. H. Shi, S. Q. Xu, F. Yang, X. J. Li, Z. C. Wang and C. J. Tian. Aggregate-related changes in soil microbial communities under different ameliorant applications in saline-sodic soils[J]. Geoderma,2018,329:108-117. |
| APA | S. S. Luo, S. J. Wang, L. Tian, S. H. Shi, S. Q. Xu, F. Yang, X. J. Li, Z. C. Wang and C. J. Tian.(2018).Aggregate-related changes in soil microbial communities under different ameliorant applications in saline-sodic soils.Geoderma,329,108-117. |
| MLA | S. S. Luo, S. J. Wang, L. Tian, S. H. Shi, S. Q. Xu, F. Yang, X. J. Li, Z. C. Wang and C. J. Tian."Aggregate-related changes in soil microbial communities under different ameliorant applications in saline-sodic soils".Geoderma 329(2018):108-117. |
入库方式： OAI收割
来源：东北地理与农业生态研究所
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