| 벼 도열병 Epidemics에 미치는 재배 포장 실황기상 요인 |
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권재운, 이순구 |
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| Real-Time Micro-Weather Factors of Growing Field to the Epidemics of Rice Blast |
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Jae Oun Kwon, Soon Gu Lee |
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| Abstract |
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It was investigated on the relationship of the rice blast epidemics and the real-time meteorological factors, at the experimental paddy field in 1997. Weather factors(temperature, relative humidity, irradiation, precipitation, the direction of wind, wind speed, soil temperature and leaf-wetness, etc) were measured by using the automated weather station. The most influenced weather factor to blast epidemics, was the average maxtemp( R2 = 0.95) during 10 days before leaf blast epidemics, while the least thing was wind speed(R2 = 0.24). The most potential weather factors correlated with the blast epidemics were T-ave(average temperature), Tmax( maximum temperature), RH(Relative Humidity) and RD(Relative Humidity > 90% hrs). A statistics model(the regression equation) of the blast epidemics with the potential weather factors, was established as follows ; Y = -3410.91 - 23.91 × T-ave + 28.56 × T-max + 41.0 × RH - 3.75 × RD, (R2 = 0.99). (T-ave >= 19℃, T-max - T-ave >= 5.2℃ and RH%>= 90.4%). According to the fitness test( 2) of the model, the observed blast disease severity was quite close to those expected. |
| Key Words:
AWS, disease incidence, disease severity, epidemics, modeling, real-time weather variables, rice blast disease |
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