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Effects of Eggshell Powder on Clubroot Disease Control and the Growth of Chinese Cabbage

달걀껍질이 배추의 생육과 무사마귀병 발병억제에 미치는 영향

  • Kim, Byeong-Kwan (Department of Plant Medicine, Chungbuk National University) ;
  • Lim, Tae-Heon (Research Institute of Agri-Bio Science, Samhoub Co., Ltd.) ;
  • Kim, Youn-Hee (Department of Plant Medicine, Chungbuk National University) ;
  • Park, Seok-Hwan (Department of Environmental, Civil Engineering and Information Systems, Seowon University) ;
  • Lee, Sang-Hwa (Department of Food and Nutrition, Seowon University) ;
  • Cha, Byeong-Jin (Department of Plant Medicine, Chungbuk National University)
  • 김병관 (충북대학교 식물의학과) ;
  • 임태헌 ((주)삼호유비 농생명과학연구소) ;
  • 김윤희 (충북대학교 식물의학과) ;
  • 박석환 (서원대학교 환경건설정보학과) ;
  • 이상화 (서원대학교 식품영양학과) ;
  • 차병진 (충북대학교 식물의학과)
  • Published : 2008.12.01

Abstract

Blending of eggshell powder into soil as ratio of 1:5, 1:10, 1:15, 1:20, and 1:25 did not affect seed germination rates of several crops including Chinese cabbage. The blending increased pH of distilled water and decreased the viability of resting spores of Plasmodiophora hrassicae. The ratio of non-viable resting spores in eggshell-blending water was over five times higher than in distilled water of the same pH. Chinese cabbage (cv. 'Norangbom') grew more in eggshell-blended soil than in non-treated soil, but other crops grew less. Leaf numbers and above ground growth of Norangbom increased to around 150% and 470%, respectively, in soil blended with $1:20{\sim}1:15$ of eggshell powder. Even though the optimum sizes of eggshell powder were $0.8{\sim}2.0mm$ for growth and smaller than 0.4 mm for inhibition of clubroot disease of Chinese cabbage, there was no statistical difference among the sizes. Soil pH was above 8.0 in all eggshell treatments without any statistical difference among them. Eggshell powder blending to 1:20 showed lower control efficacy, 58.5%, than registered fungicide 'Hokanna (flusulfamide)', 78.5%. However, Chinese cabbage of that blending ratio recorded the highest growth among the treatments. Therefore, blending of eggshell powder into clubroot-contaminated soil may make culture of Chinese cabbage possible by growth-increasing, even though eggshell powder could not inhibit clubroot disease entirely.

달걀껍질을 1:5, 1:10, 1:15, 1:20, 1:25의 비율로 토양에 혼화처리 하였을 때 배추를 비롯한 몇 가지 작물의 종자 발아율에는 별다른 변화가 없었다. 달걀껍질 혼화수용액의 pH는 증가하였으며, 수용액의 pH가 증가할수록 Plasmodiophora brassicae의 휴면포자 활성율은 감소하였는데, 달걀껍질 혼화수용액에서의 불활성화율이 같은 pH의 수용액에서의 불활성화율보다 5배 이상 높았다. '노랑 봄배추'는 달걀껍질을 토양에 혼화하였을 때 무처리에 비하여 생육이 증가한 반면, 다른 작물들의 생육은 달걀껍질 처리구에서 무처리보다 저조하였다. '노랑봄배추'는 달걀껍질을 $1:20{\sim}1:15$로 토양에 혼화하였을 때 엽수는 무처리의 약 150%, 지상부 생체중은 무처리의 약 470% 증가율을 보였다. 토양에 혼화한 달걀껍질 입자의 크기는 $0.8{\sim}2.0mm$일 때 배추 생장에, 그리고 0.4 mm 이하일 때 병 억제율에 가장 좋은 영향을 미쳤으나, 입자의 크기간에 통계적 유의차는 없었다. 토양의 pH는 모든 달걀껍질 처리구에서 8.0 이상으로 높게 나타났으며, 혼화비율에 따른 통계적 유의차는 보이지 않았다. 무사마귀병 방제가는 달걀껍질 1:20 처리구에서 58.5%로 공시살균제인 혹안나 처리구의 78.5% 보다는 낮았으나 배추의 지상부 생육에 있어서는 모든 달걀껍질 처리구에서 무처리나 대조약제 처리구 보다 높았다. 따라서 달걀껍질의 토양혼화는 배추 무사마귀병을 완전히 방제하지는 못하지만 배추의 생육을 촉진하여 감염포장에서도 배추 수확을 가능하게 할 수 있을 것으로 보인다.

Keywords

References

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