식물병연구 (Research in Plant Disease)

한국식물병리학회 (The Korean Society of Plant Pathology)
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병 이삭도열병의 발병시기에 따른 수량감소 비교

Assessments of Rice Yield Loss According to Infection Time of Neck Blast

  • 심홍식 (농업과학기술원 식물병리과) ;
  • 김용기 (농업과학기술원 식물병리과) ;
  • 한성숙 (작물시험장 환경생명공학과) ;
  • 성재모 (강원대학교 농생물학과)
  • Shim, Hong-Sik (Plant Pathology Division, National Institute of Agricultural Science & Technology) ;
  • Kim, Yong-Ki (Plant Pathology Division, National Institute of Agricultural Science & Technology) ;
  • Han, Seong-Sook (Environment & Biotechnolgy Division, National Crop Experiment Station) ;
  • Sung, Jae-Mo (College of Agriculture and Life Sciences,Kangwon National University)
  • 발행 : 2003.06.01
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초록

이삭도열병 발병시기가 빠를수록 벼 수량은 비례하여 감소되는데 조생종인 진미벼의 경우 출수 초기에 발병된 벼는 2년간의 조사결과 83.9%와 81.6%가 각각 감수되었으며, 출수 30일과 42일 후에 발병될 경우에도 44.3%와 33.1%가 감수되었다. 이삭도열병 발생식기가 벼 수량에 미치는 영향을 추정하기 위하여 회귀 분석을 한 결과, 1999년은 y =-1.9729x + 71.878($R^2$ = 0.9764), 2000년은 y = ?1.6421x + 97.212($R^2$ = 0.8569)로 발병시기와 수량감소와는 매우 높은 부의 상관관계가 있었다. 중만생종인 추청벼의 경우에도 2년간의 조사결과 출수 초기에 발병된 벼는 64.9%와 47.8%가 감수되었으며, 출수 40일 후 발병된 경우 29.1%와 8.9%가 감수되었으며, 1999년은 y =-1-.2717x + 79.523($R^2$ = 0.9487), 2000년은 y = ?1.6872x + 74.545($R^2$ = 0.7993)로 발병시기와 수량감소와는 매우 높은 부의 상관관계가 있었다. 천립중 조사결과도 출수초기에 발별된 경우 백수가 많았으며, 건전구 대비 진미벼는 38.3%, 추청벼는 57.3% 정도였으며, 출수 40일 후 발병된 경우 건전구 대비 진미벼는 87.9%, 추청벼는 92.9%로 천립중이 가벼워 벼가 충실하게 성숙되지 않음을 알 수 있었다.

Correlation between rice yield loss and infection time of neck blast after panicle emergence was analyzed in paddy fields at Icheon in 1999 and 2000. As the neck blast occurred at early heading stage, the yield loss of a early maturity variety, Jinmibyeo, ranged from 83.9% to 81.6%, while it ranged from 44.3% to 33.1% when the disease developed 30 days after heading. The regression equations of yield loss(y) caused by the neck blast infection time(x) in Jinmibyeo were y =1.2717x + 79.523(R2 = 0.9487) and y = 1.6872x + 74.545(R2 = 0.7993) in 1999 and 2000. In a mid-lately maturity variety, Chucheongbyeo, yield loss ranged from 64.9% to 47.8% when the disease developed at early heading stage. While it ranged from 29.1% to 8.9% when the disease occurred 40 days after heading. The regression equations of yield loss caused by the disease in Chucheongbyeo were y= 1.2717x + 79.523($R^2$ = 0.9487) and y = 1.6872x + 74.545(($R^2$ = 0.7993) in 1999 and 2000. Weights of 1,000 rice grains of Jinmibyeo and Chucheongbyeo were also drastically decreased to 38.3% and 57.3%, respectively, compared to healthy control when the disease occurred at early heading stage. However, weights of the two cultivars were 87.6% and 92.9% compared to control when the disease developed after 40 days of heading. Results indicated that there is a highly negative correlation between rice yield loss and infection time of the neck blast.

키워드

참고문헌

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피인용 문헌

  1. Assessments of Yield and Quality of Rice Affected by Rice Panicle Blast vol.9, pp.4, 2003, https://doi.org/10.5423/RPD.2003.9.4.183
  2. Pathogenic Races of Pyricularia oryzae Isolated from Various Rice Cultivars on the Blast Nursery and Paddy Field in Different Locations vol.18, pp.4, 2012, https://doi.org/10.5423/RPD.2012.18.4.324
  3. Establishment of Economic Threshold by Evaluation of Yield Component and Yield Damages Caused by Leaf Spot Disease of Soybean vol.19, pp.3, 2013, https://doi.org/10.5423/RPD.2013.19.3.196