Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effects of Green Manure Crops on Growth and Yield of Carrot for Reduction of Continuous Cropping Injury of Carrot through Crop Rotation

당근 연작장해 경감을 위한 녹비작물 재배가 당근 생육 및 수량에 미치는 영향

  • Kim, Seong-Heon (Divison of Applied Life Science & Institute of Agriculture and Life Science, GyeongSang National University) ;
  • Seo, Dong-Cheol (Department of Bio-Environmental Sciences, Sunchon National University) ;
  • Park, Jong-Hwan (Divison of Applied Life Science & Institute of Agriculture and Life Science, GyeongSang National University) ;
  • Lee, Seong-Tae (Gyeongnam Agricultural Research and Extension Services) ;
  • Lee, Sang-Won (Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology) ;
  • Kim, Hong-Chul (Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology) ;
  • Cho, Ju-Sik (Department of Bio-Environmental Sciences, Sunchon National University) ;
  • Heo, Jong-Soo (Divison of Applied Life Science & Institute of Agriculture and Life Science, GyeongSang National University)
  • 김성헌 (경상대학교 응용생명과학부(Bk21 농생명산업 글로벌 인재 육성 사업단) & 농업생명과학원) ;
  • 서동철 (순천대학교 생물환경학과) ;
  • 박종환 (경상대학교 응용생명과학부(Bk21 농생명산업 글로벌 인재 육성 사업단) & 농업생명과학원) ;
  • 이성태 (경상남도농업기술원) ;
  • 이상원 (경남과학기술대학교 제약공학과) ;
  • 김홍출 (경남과학기술대학교 제약공학과) ;
  • 조주식 (순천대학교 생물환경학과) ;
  • 허종수 (경상대학교 응용생명과학부(Bk21 농생명산업 글로벌 인재 육성 사업단) & 농업생명과학원)
  • Received : 2013.10.23
  • Accepted : 2013.12.17
  • Published : 2013.12.31
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Abstract

BACKGROUND: Soil incorporation of green manure crop(GMC) is one of the methods for reducing continuous cropping injury and increasing yield of carrot. The purpose of this study was to evaluate the effects of green manure crops on growth and yield of carrot for reduction of continuous cropping injury of carrot through crop rotation. METHODS AND RESULTS: To reduce the injury by continuous cropping system(CCS) of carrot cultivation, GMCs such as crotalaria and sudangrass were applied, which GMC was sowed in latter-June and returned to soil in latter-October. Nutrient contributions of N, $P_2O_5$, $K_2O$, CaO, and MgO in crotalaria were 8.3, 7.5, 4.4, 7.8, and 2.1 kg/10a, respectively. Nutrient contributions of N, $P_2O_5$, $K_2O$, CaO, and MgO in sudangrass were 8.4, 8.6, 26.8, 0.3, and 2.7 kg/10a, respectively. After incorporation of GMCs into soil, bulk density in soil with GMCs was lower than that in soil without GMCs(control). In soil after incorporation of GMCs, pH was not different in all treatment conditions, and ranged from 6.37~6.64. EC in soil after incorporation of GMCs was lower than that in soil without GMCs. The OM, T-N, and avail. $P_2O_5$ contents in soil with GMCs were higher than those in soil without GMCs. The growth and yields were increased as 39.2%(6,226 kg/10a) in the rotational cropping system(RCS) as compared to continuous cropping system(control and without NPK) of 4,473 kg/10a. Crotalaria cultivation were the most effective crop for reducing the injury of continuous cropping of carrot. CONCLUSION(S): This study suggest that the RCS using GMCs showed lower disease outbreak density in soil for carrot cultivation as compared to CCS without GMCs. Especially, the GMCs good effect for reduction of continuous cropping injury of carrot.

본 연구는 시설하우스 당근 연작장해 경감을 위한 녹비작물 재배가 당근의 생육특성 및 수량에 미치는 영향을 알아보기 위한 연구로서 하계녹비작물인 크로타라리아 및 수단글라스를 실제 당근 연작재배지에 단파 및 혼파로 구분하여 파종하였으며, 생육된 녹비작물의 양분공급량을 조사하였고, 녹비작물의 토양환원 후 토양의 이화학적 특성을 조사하였으며, 녹비작물 토양에 환원 후 후작물인 당근의 생육특성 및 당근의 장해율과 상품수량을 조사하여 녹비작물의 당근 연작장해 경감효과를 조사하였다. 시설하우스 당근 연작재배지서 생육된 녹비작물의 질소(N), 인($P_2O_5$), 칼륨($K_2O$), 칼슘(CaO) 및 마그네슘(MgO) 공급량은 크로타라리아의 경우 각각 8.3, 7.5, 4.4, 7.8 및 2.1 kg/10a이었으며, 수단글라스의 경우 각각 8.4, 8.6, 26.8, 0.3 및 2.7 kg/10a이었으며, 혼파의 경우는 단파와 유사한 경향이었다. 당근 연작재배지에서 녹비작물의 토양환원 전 후 토양의 물리학적 특성을 조사한 결과 용적밀도는 녹비작물 처리구가 대조구에 비해 감소하는 경향이었고, 공극률은 증가하는 경향이었다. 토양환원 전 후 토양의 pH는 대조구와 별다른 차이 없이 6.37-6.64 범위였으며, EC는 크로타라리아(2.86 dS/m) 및 수단글라스(2.24 dS/m) 처리구가 대조구(3.14 dS/m)에 비해 낮았다. 토양 중 유기물, T-N 및 avail. $P_2O_5$ 함량은 녹비작물 처리구가 대조구에 비해 증가하는 경향이었다. 녹비작물 토양환원에 따른 후작물인 당근의 총 생산량은 크로타라리아 처리구에서 7,916 kg/10a로 가장 높은 수량을 보였으며, 대조구의 경우는 6,869 kg/10a로 가장 낮았다. 장해율은 대조구, 관행처리구, 크로타라리아, 수단글라스, 수단글라스 + 크로타라리아 처리구에서 각각 34.9, 23.1, 21.4, 22.9 및 19.8%로 혼파 처리구에서 가장 낮은 장해율을 보였다. 당근의 상품수량은 크로타라리아 처리구(6,226 kg $10a^{-1}$)가 관행처리구(5,890 kg/10a) 및 대조구(4,473 kg/10a)에 비해 각각 5.7% 및 39.2%의 증수효과를 보였다. 이상의 결과를 미루어 볼 때, 당근 연작재배지에서 녹비작물의 시용은 비료로서 충분한 가치가 있으며, 녹비작물 토양환원 후 토양의 물리성 및 화학성을 개선함으로써 시설하우스 당근 연작재배지의 연작장해를 경감할 수 있을 것으로 사료된다.

Keywords

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