Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effects of Organic Matter Application on Soil Microbial Community in a Newly Reclaimed Soil

신규 유기농경지 토양의 유기물 공급이 토양 미생물군집에 미치는 영향

  • 안난희 (국립농업과학원 유기농업과) ;
  • 옥정훈 (국립농업과학원 유기농업과) ;
  • 조정래 (국립농업과학원 유기농업과) ;
  • 신재훈 (국립농업과학원 유기농업과) ;
  • 남홍식 (국립농업과학원 유기농업과) ;
  • 김석철 (국립농업과학원 유기농업과)
  • Received : 2015.10.13
  • Accepted : 2015.10.21
  • Published : 2015.12.31
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Abstract

soil microbial activities and diversities in a newly reclaimed soil. Soil chemical properties, population of microbe, microbial biomass, and properties of microbial community were investigated under 4 different treatment (animal manure compost+green manure, chemical fertilizer, and without fertilizer). The experiment was conducted for 3 years from 2012 to 2014. The most of chemical properties in the animal manure compost+green manure treatment were increased continually compare to chemical fertilizer and without fertilizer. The population of bacteria and fungi were higher in the animal manure compost+green manure treatment, however, there was no difference on actinomyces. Soil microbial biomass C content was higher in the animal manure compost+green manure treatment than in chemical fertilizer and without fertilizer. Biolog examination showed that catabolic diversities of bacterial communities were higher in the treatment of animal manure compost+green manure. It was showed that principle component analysis of the Biolog data differentiated the organic matter amended soils from NPK and control. These results indicated that application of animal manure compost+green manure had a beneficial effect on soil microbial properties.

본 연구에서는 신규 개간지 유기농경지에서 가축분퇴비와 녹비작물을 2년간 연용하였을 때 유기물에 의한 밭 토양미생물 군집에 미치는 영향을 평가하고자 수행하였다. 가축분 퇴비와 녹비를 연용한 처리구는 화학비료와 무비 처리구에 비해 유기물 함량이 증가하였다. 세균과 사상균 개체수는 유기물을 연용 할수록 유기물 처리구와 화학비료 그리고 무비 처리구간의 유의적인 차이를 나타내었다. 또한 가축분 퇴비와 녹비 연용으로 토양 미생물체량은 모든 처리구가 증가하였으며 NPK와 무비구에 비해 퇴비, 녹비 처리구에서 높게 나타났다. 유기물 연용에 의한 토양미생물 군집의 기능적 다양성 분석에서 가축분 퇴비, 녹비 처리구가 화학비료나 무비구에 비해 기질 이용도가 유의적으로 증가하였으며 유기물 처리구가 화학비료나 무비구에 비해 높은 종 다양성을 나타냈다. 그리고 주성분 분석에서 제2주성분에 의해 유기물 처리구와 그렇지 않은 화학비료, 무비구로 분리되었다.

Keywords

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