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http://dx.doi.org/10.7745/KJSSF.2016.49.4.381

Microbial Differentiation on Chemical Properties of Paddy Soils in Reclaimed Tidal Lands at Western-coast Area of Korea  

Park, Mi-Na (Department of Food Science and Biotechnology, Wonkwang University)
Yang, Kwang-Min (Department of Food Science and Biotechnology, Wonkwang University)
Ryu, Jin-Hee (National Institute of Crop Science, Rural Development Administration)
Sa, Tongmin (Department of Environmental Science and Biological Chemistry, Chungbuk National University)
Choi, Joon-Ho (Department of Food Science and Biotechnology, Wonkwang University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.49, no.4, 2016 , pp. 381-387 More about this Journal
Abstract
The scientific information on the microbial differentiation according to the changes in chemical properties of paddy soil in reclaimed tidal lands is not enough to understand the reclamation processes. The changes in microflora based on the chemical properties of paddy soils at the same sites of reclaimed tidal lands (21 samples from Nampo, Ewon, Sukmoon and Shihwa sites) were investigated in 2013 and 2015. In general, organic matter in paddy soils increased whereas pH decreased with the reclamation time. The electrical conductivities (EC) of soil samples were closely related to the exchangeable $Na^+$. With an increases in EC of paddy soils from 0.39 to $48.9dS\;m^{-1}$, the ratios (%) of halotolerant and halophilic bacteria to mesophilic bacteria proportionally increased from 0.2% to 102,000%. The population of halotolerant and halophilic bacteria in total microflora was also differentiated with the changes in EC of the same sites from reclaimed tidal soils within 2 years. The population of mesophilic bacteria decreased with an increase in EC above $5dS\;m^{-1}$. The microflora including halotolerant and halophilic bacteria could be a candidate as a biological parameter in evaluating the reclamation processes in addition to the chemical index of EC.
Keywords
Electrical conductivity; Salinity; Microbial differentiation; Halotolerant and halophilic bacterial distribution;
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