Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Comparative Analysis on the Invertebrate Biodiversity between Organic and Conventional Agriculture Fields

유기 및 관행농법 농경지의 무척추동물 생물다양성 비교

  • 김훈 (단국대학교 자연과학대학 생명과학과) ;
  • 서재휘 (단국대학교 자연과학대학 생명과학과) ;
  • 김교진 (단국대학교 자연과학대학 생명과학과) ;
  • 최가인 (단국대학교 자연과학대학 생명과학과) ;
  • 조영주 (단국대학교 공공인재대학 환경자원경제학과) ;
  • 김태연 (단국대학교 공공인재대학 환경자원경제학과) ;
  • 문명진 (단국대학교 자연과학대학 생명과학과)
  • Received : 2017.09.14
  • Accepted : 2017.11.16
  • Published : 2017.11.30
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Abstract

Although some skeptical views arguing that the impact of organic farming is quite limited to sustainable biodiversity, the organic agriculture has been generally accepted to have positive effects on various properties of soils not only on biophysical and ecological properties but also on biodiversity of the field. Therefore, this field investigation has been conducted to examine the effect of organic farming, relative to conventional agriculture, through a comparative investigations of the two systems for conserving local biodiversity of invertebrate animals. For this research, organic and conventional farming locations matched with both of a paddy field and a upland fields in Goesan-gun province (Chungcheongbuk-do, South Korea) were selected to compare the species richness of invertebrate biodiversity as follows: location OP (Organic Paddy field), location OU (Organic Upland field), location CP (Conventional Paddy field), and location CU (Conventional Upland field). Among 249 species collected, the numbers of species collected in the locations practicing organic farming were greater than the locations practicing conventional farming both in paddy fields (104 vs. 84 species) and upland fields (108 vs. 77 species). Changes in species richness can be shown in the selected locations depending on the agriculture system with organic (50 species) or conventional (44 species) farming systems in the paddy fields, similarly with organic (42 species) or conventional (35 species) farming in the upland fields, respectively. Our present research clearly shows that a wide range of taxa, including insects, spiders and other invertebrates, benefit from organic management through increases in abundance or species richness. It has been also identified that four orders (Hemiptera, Diptera, Hynemoptera, and Araneae) that are largely intrinsic to organic paddy field, and another three orders (Hemiptera, Coleoptera, and Araneae) that are particularly beneficial for organic crop field regime.

유기농업이 생물 다양성에 미치는 효과가 제한적이라는 일부 회의적인 시각이 있긴 하지만, 유기농업은 토양의 물리적 및 생태학적 특성과 생물 다양성에 영향을 미치는 것으로 받아들여지고 있다. 본 연구는 충청북도 괴산지역에서 유기농업과 관행농업을 시행하는 논과 밭을 대상으로 경작 기간 중 채집된 무척추동물의 종을 분류 동정하여 농법의 차이에 따른 생물 다양성의 변화를 비교 분석하였다. 조사 기간인 2016년 6월부터 10월까지 채집된 총 249종의 무척추동물 중에서, 유기농업을 시행하는 지역의 논과 밭에서는 각각 104종과 108종이 관찰된 반면, 관행농업을 시행하는 논과 밭에서는 각각 84종과 77종이 관찰되어, 산술적으로 관행농업 지역에 비해 유기농업 지역의 종 다양성이 약 20% 높은 것으로 비교되었다. 특히 유기농업의 시행에 따라 곤충류와 거미류의 분류군에서 긍정적인 종 다양성 변화가 관찰되었다. 한편, 유기농업 논에서는 노린재목, 파리목, 벌목, 거미목 등의 분류군이, 그리고 유기농업 밭에서는 노린재목, 딱정벌레목, 거미목 등이 관행농업 지역의 논과 밭에 비해 생물 다양성이 증가하는 것으로 분석되어, 유기농업 시행에 따른 생물 지표종의 선정을 위해서는 향후 이들 분류군에 대한 정밀한 조사가 필요할 것으로 생각된다.

Keywords

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