한국유기농업학회지 (Korean Journal of Organic Agriculture)

  • 제19권2호
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  • Pages.229-243
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  • 2011
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  • 1229-3571(pISSN)
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  • 2287-819X(eISSN)
한국유기농업학회 (Korean Association of Organic Agriculture)
권호 표지

유기농법과 관행농법에 의해 재배한 '신고'배 과원 토양의 물리화학적 및 미생물학적 특성 비교

Comparison of Soil Physico-chemical and Microbial Characteristics in Soil of 'Niitaka' Pear Orchards between Organic and Conventional Cultivations

  • 최현석 (국립농업과학원 유기농업과) ;
  • 이웅 (전남대학교 원예학과) ;
  • 김월수 (전남대학교 원예학과) ;
  • 이연 (국립농업과학원 유기농업과) ;
  • 지형진 (국립농업과학원 유기농업과)
  • 투고 : 2010.02.26
  • 심사 : 2011.06.22
  • 발행 : 2011.06.30
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초록

최근에 소비자들의 안전 농산물에 대한 관심과 정부의 정책적인 친환경농업에 대한 지원은 유기농 재배를 지속적으로 발전시켜 왔다. 본 연구는 유기농 재배 과원과 관행 과원간의 토양 물리성과 화학성 및 미생물성에 대한 시기별 비교분석을 통하여 변화양상을 구명하고자 수행되었다. 토양 가비중과 고상 및 경도는 유기농 과원에서 통계적으로 유의성있게 낮게 나타났다. 토양 pH와 유기물 함량은 3월에서 8월까지 증가하는 경향이 나타났고, 유기농 과원에서 관행과원에 비하여 높은 경향을 나타내었다. 전질소와 유효인산은 처리구에 상관없이 3월에서 8월까지 각각 감소하는 경향을 보였으며, 유기농 과원에서 관행과원보다 전질소는 높았으나 유효인산은 낮은 경향을 나타내었다. 토양 미생물 탄소 생체량은 처리구에 상관없이 3월부터 8월까지 증가(유기농 36%, 관행 15%)하였고, 미생물 질소생체량은 6월에 가장 높았고, 유기농 과원에서 관행과원보다 지속적으로 높은 미생물 생체량을 나타내었다. 토양중 dehydrogenase와 chitinase activity는 3월과 8월보다 6월에 가장 높았고, ${\beta}$-glucosidase activity는 시기적으로 점차 감소(유기농 38%, 관행 48%)하였으며, acid phosphatase activity는 증가하였다. 유기농 배 과원토양에서 관행재배에 비하여 6월에 조사된 acid phosphatase activity를 제외하고는 모든 효소활성이 시기에 상관없이 높은 분포를 나타내었다.

Consumers' interest and government's support for the fruits rapidly increased organic fruit productions. This study was examined to compare the soil physicochemical and microbial properties of orchards soil in conventionally and organically management systems. Organic cultivation had lower soil bulk density, solid phase, and penetration resistance than the conventional cultivation. Soil pH and organic matter contents increased from March to August, and the values were greater in the organic cultivation than the conventional cultivation. Total nitrogen (N) and phosphorous concentrations decreased from March to August, and the organic soils had greater N but lower phosphorous concentrations than the conventional soils. Soil microbial carbon biomass increased 36% and 15% for organic and conventional cultivations, respectively, from March to August. Soil microbial N biomass was greater in June than March or August, and the organic cultivation had a greater biomass N compared to the conventional cultivation. Soil dehydrogenase and chitinase activities were greater in June than in March or August. ${\beta}$-glucosidase activity declined in both cultivations, while the phosphatase activity increased. Organic cultivation had greater enzyme activities in March, June, and August, except for the acid phosphatase activity in June.

키워드

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