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| Effects of salinity on the soil microbial community and soil fertility |
ZHANG Wen-wen1, 2, 3, WANG Chong1, 2, 3, XUE Rui1, 2, 3, WANG Li-jie1, 2, 3
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1 College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R.China
2 Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing 100193, P.R.China
3 Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, P.R.China |
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Abstract Saline area is an important reserve resource of arable land, however, the effects of soil microorganisms on the soil fertility in saline coastal ecosystems remain poorly understood. The salinity effects on soil microorganisms, nutrient availabilities and their relationships were studied in soils along a salinity gradient. A total of 80 soil samples were collected from 16 sites at four salinity levels (non-saline soil, salt content<1 g kg–1; low salinity soil, salt content=1–2 g kg–1; middle salinity soil, salt content=2–4 g kg–1; high salinity soil, salt content>4 g kg–1). The results showed that the salinity increased soil pH and exchangeable Na percent, but decreased soil organic matter, soil exchangeable K, and soil microbial biomass. Both the abundance and community composition of soil bacteria and fungi were significantly different between the non-saline and the saline soils. The predominant genera of soil bacteria (Planctomyces and Archangium, positive for carbon fixation) and fungi (Hydropisphaera, efficient in lignin degradation) changed with the increasing soil salinity and the decreasing soil organic matter. In summary, soil salinity changed the abundances of soil bacterial, fungal, and arbuscular mycorrhizal communities and, subsequently, affected their function in saline coastal ecosystems.
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Received: 07 March 2018
Accepted:
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| Fund: This work was funded by the National Key Research and Development Program of China (2016YFE0101100), the National Natural Science Foundation of China (31570514), the Key Technologies R&D Program of China during the 12th Five-year Plan period (2013BAD05B03). |
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Corresponding Authors:
Correspondence WANG Chong, Tel: +86-10-62734710, E-mail: wangchong@cau.edu.cn
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| About author:
ZHANG Wen-wen, Tel: +86-10-62734710, E-mail: zhangwenwen419@126.com; |
Cite this article:
ZHANG Wen-wen, WANG Chong, XUE Rui, WANG Li-jie.
2019.
Effects of salinity on the soil microbial community and soil fertility. Journal of Integrative Agriculture, 18(6): 1360-1368.
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