| 李春广1*, 刘梦泽2, 汤金仪1, 姜玉英1, 赵中华1, 沈佐锐3, 程登发4.农作物病虫发生级别与自然危害损失率关系辨析[J].植物保护,2015,41(5):13-16. |
| 农作物病虫发生级别与自然危害损失率关系辨析 |
| Analyzing the relationships between crop diseases and pests occurrence level and natural loss rate |
| 投稿时间：2014-09-24 修订日期：2014-12-07 |
| DOI： |
| 中文关键词: 病虫发生级别 5级自然损失率 逻辑斯蒂曲线 倍率指数曲线 |
| 英文关键词:diseases and pests occurrence level level 5 natural loss rate logistic curve double rate exponential curve |
| 基金项目:公益性行业(农业)科研专项(200903004) |
| 作者 | 单位 | | 李春广1*, 刘梦泽2, 汤金仪1, 姜玉英1, 赵中华1, 沈佐锐3, 程登发4 | 1. 全国农业技术推广服务中心, 北京 100125
2. 湖北省孝感市植保站, 孝感 432000
3. 中国农业大学农学与生物技术学院, 北京 100193
4. 中国农业科学院植物保护研究所, 北京 100193 |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| The natural loss rate of crop diseases and pests collected nationwide with occurrence level 5 was mostly between 15%-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 diseases 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. |
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