CAJ | 학술논문

在全国范围内征集的农作物病虫5级自然损失率大多在15%~45%之间，客观证实了不同病虫发生级别相同时自然危害损失率之间存在差异。一方面病虫发生量与其自然危害损失率之间理论上为逻辑斯蒂曲线关系，另一方面病虫发生级别的判定存在着人为的经验感知比较，加之病虫5级自然损失率一般低于50%，为统一简化关系且便于计算，我们将病虫1~5级相邻发生级别间自然危害损失率近似确定为倍率指数曲线关系。
재전국범위내정집적농작물병충5급자연손실솔대다재15%~45%지간，객관증실료불동병충발생급별상동시자연위해손실솔지간존재차이。일방면병충발생량여기자연위해손실솔지간이론상위라집사체곡선관계，령일방면병충발생급별적판정존재착인위적경험감지비교，가지병충5급자연손실솔일반저우50%，위통일간화관계차편우계산，아문장병충1~5급상린발생급별간자연위해손실솔근사학정위배솔지수곡선관계。
The natural loss rate of crop diseases and pests collected nationwide with occurrence level 5 was mostly between 1 5%-45%,which objectively confirmed that different diseases and pests at the same occurrence level existed differences between natural loss rates.On one hand,the relationship between the amount of pests and dis-eases and natural loss rate showed logistic curve theoretically,on the other hand,there is a comparison of human perceptual experience in the determination of diseases and pests occurrence level.What is more,the natural loss rate of pests with occurrence level 5 is generally lower than 50%.For a unified and simplified relationship and easy calculation,we approximately identified the natural loss rate of the pests at adjacent level from 1 to 5 as double rate exponential curve relationship.