Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Earthworm Fauna in Citrus Orchards by Legume Cover Crop Culture in Jeju Island

제주 유기 감귤 과수원의 두과피복작물 재배에 따른 지렁이 분포

  • 박종호 (국립농업과학원 유기농업과) ;
  • 김유경 (제주특별자치도 농업기술원 친환경연구과) ;
  • 김용기 (국립농업과학원 유기농업과) ;
  • 한은정 (국립농업과학원 유기농업과) ;
  • 심창기 (국립농업과학원 유기농업과) ;
  • 변영웅 (국립농업과학원 유기농업과) ;
  • 김민정 (국립농업과학원 유기농업과) ;
  • 김용욱 (국립농업과학원 유기농업과)
  • Received : 2018.12.26
  • Accepted : 2019.02.20
  • Published : 2019.02.28
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Abstract

This study was carried out to investigate the effect of legume cover crop culture on earthworm fauna in organic farmland. We compared sod culture with two kinds of legume crops of hairy vetch and crimson clover on organic citrus orchard to natural sod culture and conventional orchards in Jeju Island. We analyzed the soil characteristics and investigated the density of earthworms from the orchards. Organic matter content did not show much difference in soil analysis between organic and conventional orchard. But the biomass of earthworms in organic orchards is 3.8 times to 7.0 times higher than that in conventional cultivated orchards, and individuals of earthworms on organic orchards were 2.3~18 times higher than conventional orchards. The biomass of earthworms on hairy vetch and crimson clover cultivation was 44.8 g, 47.2 g in 2016, and 78.7 g, 31.8 g in 2017, respectively, which were higher than 32.8 g and 9.5 g of those on natural sod cultivation. Through this study, we found that hairy vetch and crimson clover cultivation improve the earthworm occurrence density in the soil on organic citrus orchard.

본 연구에서는 유기농경지에서 두과피복작물 재배가 지렁이 생물상에 끼치는 영향을 조사하고자 제주도 유기농 감귤 과수원에 헤어리베치와 크림슨클로버 2종의 두과작물을 초생재배하여 자연초생재배구와 관행과수원을 대조로 연구를 수행하였다. 각 재배 시험구의 토양 특성을 분석하고 포장에서 발생한 지렁이를 채취하여 발생 밀도를 비교하였다. 토양분석에서 유기농과 관행농 과수원의 유기물 함량은 큰 차이를 보이지 않았으나, 지렁이의 생체중은 유기재배 과수원이 관행재배 과수원에 비해 3.8배~7.0배 높게 나타났으며, 개체수도 유기재배 과수원이 관행재배 과수원에 비해 2.3~18배 높게 나타났다. 지렁이의 생체중은 헤어리베치와 크림슨클로버 재배구에서 2016년에는 44.8 g, 47.2 g, 2017년에는 78.7 g, 31.8 g으로 자연초생재배구의 32.8 g, 9.5 g보다 각각 높게 나타났다. 본 연구를 통해 두과피복작물인 헤어리베치와 크림슨클로버 재배를 통해 유기농 감귤 과수원의 토양 내 지렁이 발생밀도를 증진시키는 것을 확인하였다.

Keywords

References

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