Soil Microbial Community Analysis using Soil Enzyme Activities in Red Pepper Field Treated Microbial Agents
2012
Kim, Y.H., Yeungnam University, Gyeongsan, Republic of Korea | Lim, J.H., Yeungnam University, Gyeongsan, Republic of Korea | An, C.H., Yeungnam University, Gyeongsan, Republic of Korea | Jung, B.K., Yeungnam University, Gyeongsan, Republic of Korea | Kim, S.D., Yeungnam University, Gyeongsan, Republic of Korea
Increasing concerns over green farming technology, plant growth promoting rhizobacterium (PGRP) having growth promoting as well as plant disease suppressing properties was recently preferred to use for biological control of plant pathogens infecting plant. We measured the influence of the selected microbial consortium agents-a mixture of PGPR strains-, commercial bio-fungicide, and chemical pesticides on soil microbial community in red pepper field. The activities of soil enzyme such as dehydrogenase, urease, phosphatase, β-glucosidase, and cellulase were analyzed to investigate that of soil microbial community. We also measured plant length, main stem, stem diameter, number of branches and yields of red-pepper in order to observe the red pepper growth promotion. The results of measuring enzyme activities were dehydrogenase 3.5584 ㎍ TPF g-¹h-¹, urease 15.8689 ㎍ NH₄-N g-¹h-¹, phosphatase 0.5692 ㎍ PNP g-¹h-¹, β-glucosidase 2.4785 ㎍ PNP g-¹h-¹, and cellulase 86.1597 glucose in the soil treated with the microbial consortium agents, so it came out to be very active in the soil. Observing the growth of red-peppers, the main-stem length and the stem diameter were 6.1% and 8.1% higher in the soil treated with the selected microbial consortium agent than the chemical pesticides. After harvesting, yields were 7.3% higher in the soil treated with selected microbial consortium agents than the chemical pesticides. These results showed that microbial consortium agents contribute to increasing soil microbial diversity, growth promoting, and yield of red pepper.
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