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Long-term Composting and Fertilization Impact on Dehydrogenase-producing Bacteria and Dehydrogenase Activity in Rice Paddy Soil  

Suh, Jang-Sun (National Institute of Agricultural Science & Technology, RDA)
Kim, Su-Jung (National Institute of Agricultural Science & Technology, RDA)
Noh, Hyung-Jun (National Institute of Agricultural Science & Technology, RDA)
Kwon, Jang-Sik (National Institute of Agricultural Science & Technology, RDA)
Jung, Won-Kyo (National Institute of Agricultural Science & Technology, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.40, no.4, 2007 , pp. 229-233 More about this Journal
Abstract
A long-term rice paddy field, which is located in the National Institute of Crop Science (Suwon city, Korea) has been managed for studying of fertilization and composting impact on paddy soil fertility since 1954. The objective of this research was to evaluate soil quality through dehydrogenase analysis in long-term paddy soil treatment plots, such as control, N fertilization (N), NPK fertilization (NPK), and rice straw compost with NPK (CNPK). Dehydrogenase-producing bacterial population developing red-colored triphenyl formazan (TPF) was highly correlated to the dehydrogenase activity in rice paddy soils sampled prior to waterlog. The dehydrogenase-producing bacterial population and dehydrogenase activity was comparatively high in plots of NPK, and CNPK, which organic matter content was relatively high.
Keywords
Microbial activity; Dehydrogenase; Triphenyl formazan; 2,3,5-Triphenyl tetrazolium chloride;
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