Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Effects of Animal Manure Compost, Tillage Method and Crop System on Soil Properties in Newly Organic Corn Cultivation Field

신규 유기농 옥수수 재배 시 가축분 퇴비, 경운방법 및 작부체계가 토양 환경에 미치는 영향

  • An, Nan-Hee (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Lee, Sang-min (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Cho, Jung-Rai (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Nam, Hong-Sik (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Jung, Jung-A (Organic Agriculture Division, National Institute of Agricultural Science) ;
  • Kong, Min-jae (Organic Agriculture Division, National Institute of Agricultural Science)
  • 안난희 (국립농업과학원 유기농업과) ;
  • 이상민 (국립농업과학원 유기농업과) ;
  • 조정래 (국립농업과학원 유기농업과) ;
  • 남홍식 (국립농업과학원 유기농업과) ;
  • 정정아 (국립농업과학원 유기농업과) ;
  • 공민재 (국립농업과학원 유기농업과)
  • Received : 2018.10.16
  • Accepted : 2018.12.17
  • Published : 2018.12.30
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Abstract

This study was conducted to investigate the effects of organic farmland soil and nutrient management on soil properties depending on organic (animal manure compost and green manure [hairy vetch]) and chemical fertilization, tillage and no-tillage, and crop rotation (corn-wheat, corn-.hairy vetch). It was found that the application of organic matter such as animal manure compost and hairy vetch, increased the soil organic matter content, the soil microbial density and microbial biomass C content as compared with the chemical fertilizer treatment. It was also confirmed that the functional diversity of soil microbial community was increased. As a result of the comparison with the crop rotation and single cropping, the soil chemistry showed no significant difference between the treatments, but the corn-wheat and corn-hairy vetch rotation treatments tended to have higher microbial biomass C content and shannon's diversity index than the single cropping. Soil chemical properties of tillage and no-tillage treatments showed no significant difference between treatments. There was no statistically significant difference in substrate utilization of soil microbial community between tillage and no-tillage treatment. Correlation analysis between soil chemical properties and soil microbial activity revealed that soil organic matter content and exchangeable potassium content were positively correlated, with statistical significance, with substrate utilization, and substrate richness. To conclude, organic fertilization had positive effects on the short-term improvement of soil chemical properties and diversity of microbial communities.

본 연구는 유기 농경지의 토양 및 양분관리 방법으로 가축분과 풋거름(헤어리베치)공급, 윤작 시스템. 그리고 경운 및 무경운 처리가 토양환경에 미치는 영향을 구명하고자 수행하였다. 신규 옥수수 재배 토양의 양분공급원으로 가축분 퇴비, 헤어리베치와 같은 유기물 공급이 화학비료 처리에 비해 토양 유기물 함량을 높이며 토양의 미생물 밀도와 미생물체량 C함량을 증가시키는 것을 알 수 있었다. 또한 토양 미생물 군집의 기능적 다양성이 증가하는 것을 확인하였다. 윤작재배 효과로 토양 화학성은 처리간의 차이가 뚜렷하게 나타나지 않았지만 옥수수-밀, 옥수수-헤어리베치 윤작 처리구가 옥수수 단작 처리구보다 토양의 미생물체량 C 함량과 종 다양성 지수가 높은 경향을 보였다. 경운 여부에 따른 토양 화학성은 처리간의 뚜렷한 차이를 나타내지 않았다. 토양 미생물 군집의 기질 이용에서 무경운이 경운처리 보다 다소 높게 나타났지만 통계적인 유의차는 없었다. 처리에 따른 토양의 화학성과 미생물상간의 요인간 상관관계 분석 결과, 토양 유기물 함량과 치환성 칼륨 함량은 기질 이용도, 기질 풍부도와 양의 상관관계를 보였다. 이러한 결과로부터 가축분 퇴비, 헤어리베치와 같은 유기물 시용으로 옥수수 재배 토양의 화학성 및 미생물상에 긍정적인 효과를 나타낸 것으로 판단되었다.

Keywords

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