Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effect of Inoculation of Methylobacterium oryzae on the Growth of Red Pepper at Different Organic Fertilizer Levels

다양한 유기질비료 수준에서 Methylobacterium oryzae CBMB20의 처리에 따른 고추의 생육 평가

  • Chauhan, Puneet Singh (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Lee, Gil-Seung (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Lee, Min-Kyoung (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Yim, Woo-Jong (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Lee, Gyeong-Ja (Chungbuk Agricultural Research and Extension Services) ;
  • Kim, Young-Sang (Chungbuk Agricultural Research and Extension Services) ;
  • Chung, Jong-Bae (Division of Life and Environmental Science, Daegu University) ;
  • Sa, Tong-Min (Department of Agricultural Chemistry, Chungbuk National University)
  • ;
  • 이길승 (충북대학교 농업생명환경대학 농화학과) ;
  • 이민경 (충북대학교 농업생명환경대학 농화학과) ;
  • 임우종 (충북대학교 농업생명환경대학 농화학과) ;
  • 이경자 (충청북도 농업기술원) ;
  • 김영상 (충청북도 농업기술원) ;
  • 정종배 (대구대학교 생명환경학부) ;
  • 사동민 (충북대학교 농업생명환경대학 농화학과)
  • Received : 2010.08.07
  • Accepted : 2010.08.17
  • Published : 2010.08.31
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Abstract

Plant growth promoting ability of Methylobacterium oryzae CBMB20 was evaluated under different levels of organic fertilizer application on red pepper plants in a pot experiment. Oil cake as an organic N fertilizer was applied at the rates of 70, 85, 100 and 120% of the conventional recommended level. Each treatment was further treated with or without M. oryzae CBMB20 inoculation. The recommended amount of compost for red pepper was added in all the treatments. Results revealed that plant height, dry biomass and fruit yield were enhanced in increasing order as the rate of fertilization increased. Overall plant growth was improved due to the inoculation of M. oryzae CBMB20 and red pepper fruit yield was also increased by 10-35% in the plants inoculated with M. oryzae CBMB20 at different rates of organic fert1izer application. Total methylotrophic bacterial population in rhizosphere soil measured at the time of harvest was significantly higher in M. oryzae CBMB20 inoculated treatments. The growth promoting effect of M. oryzae CBMB20 found in red pepper could be due to the effective colonization of the bacteria in the rhizosphere and its ability of enhancing nutrient availability and producing plant growth hormones. With the plant growth promoting effect of M. oryzae CBMB20, the rate of organic fertilizer application can be reduced without any significant decreases in biomass production and yield of red pepper.

다양한 유기질비료 수준에서 Methylobacterium oryzae CBMB20의 처리가 고추의 생육촉진에 미치는 영향을 조사하였다. 유기질비료 권장시비수준의 70, 85, 100, 120% 시용구에서 시비량이 증가함에 따라 고추의 신장, 건물중 및 수량에서 유의성 있는 증가를 확인하였다. M. oryzae CBMB20의 접종 처리에서 고추의 생장이 증가하였으며, 고추의 수량 또한 각 유기질 비료 수준별로 10~35% 증가하였다. 수확기에 조사한 근권토양의 메탄올자화세균의 밀도는 M. oryzae CBMB20 처리구에서 2.51~2.63 log CFU $g^{-1}$ soil 이었으며, 미처리구에서는 1.0 log CFU $g^{-1}$ soil 이하로 나타났다. 따라서 접종한 M. oryzae CBMB20은 고추 작물 근권토양에 효과적으로 군집하였으며, 식물생장촉진 호르몬의 분비 등의 작용을 통한 작물생장촉진효과를 발휘한 것으로 판단된다. M. oryzae CBMB20을 접종하지 않은 경우에는 고추의 최대 생장과 수량이 유기질 비료 권장시비 수준 120%에서 나타났으나, M. oryzae CBMB20을 접종한 경우에는 최대 생장과 수량이 권장시비 수준에서 나타났다. 이러한 결과는 식물생장촉진미생물의 접종을 통하여 비료 사용량의 절감 가능성을 제시하는 것이며, 식물생장 촉진 미생물 제제로서 M. oryzae CBMB20의 활용이 가능하리라 사료된다.

Keywords

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