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Effect of Rye Cultivation for Reduction of Phytophthora Blight in Red Pepper Field

노지고추에서 고추역병 경감을 위한 녹비작물 호밀의 재배효과

  • 권오훈 (경북농업기술원 영양고추연구소, 경북대학교 응용생명과학부) ;
  • 김찬용 (경북농업기술원 영양고추연구소) ;
  • 김영숙 (경북농업기술원 영양고추연구소) ;
  • 원종건 (경북농업기술원 영양고추연구소) ;
  • 정희영 (경북대학교 응용생명과학부)
  • Received : 2020.03.16
  • Accepted : 2020.11.04
  • Published : 2020.11.30

Abstract

This study was carried out to evaluate the effect of rye as green manure crop on the improvement of soil environment and reduction of Phytophthora blight in red pepper of open field where Phytophthora blight occurred frequently. Soil physical properties such as bulk density and porosity were increased in rye cultivation. In addition, gaseous was increased but liquid was decreased compared with conventional cultivation. The analysis of phospholipid fatty acids extracted from soil showed that rye cultivation significantly increased relative abundance of microbial community and ratio of aerobic to anaerobic bacteria. Furthermore, ratio of saturated to unsaturated fatty acids and cyclo-fatty acids to precursor. the indicators of increasing in environmental stresses, were reduced in rye cultivated field. Occurrence of Phytophthora blight in rye cultivation was reduced 30.7% compared with conventional cultivation. These results suggest that rye cultivation in red pepper of open field where Phytophthora blight occurred can improve soil environment and reduce damage of Phytophthora blight.

고추역병 다발생 포장에서 녹비작물인 호밀재배에 따른 토양환경 변화와 고추역병 경감 효과를 조사하였다. 토양 물리성을 분석한 결과에서는 호밀재배에서 용적밀도와 공극률이 증가하였다. 또한, 토양 삼상의 분포는 고상에서는 관행재배와 차이가 없었으나, 기상은 관행재배 보다 증가하고 액상은 감소하였다. 토양 내 인지질 지방산을 추출하여 지표 지방산으로 분석한 미생물 군락의 상대밀도는 호밀재배에서 유의성 있게 증가하였으며, 호기성균/혐기성균의 비율의 비율도 호밀재배에서 높게 나타났다. 환경스트레스 지표인 포화지방산/불포화지방산 비율과 cyclo-지방산/전구체 비율은 호밀재배가 관행재배 보다 낮아 토양환경이 개선 된 것으로 나타났다. 호밀재배에 따른 고추역병의 경감효과를 조사한 결과 호밀재배가 관행재배 보다 30.7% 낮은 발병률을 나타냈다. 이상의 결과를 요약해볼 때, 고추역병 다발생 포장에서 녹비작물인 호밀재배는 토양환경을 개선하고 고추역병 발병을 감소시킬 것으로 사료된다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 농업과학기술 연구개발사업(PJ009324022015)의 지원에 의해 이루어진 것임.

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