马铃薯晚疫病气象等级预报方法研究

通过对1990-2008年围场县马铃薯晚疫病的发生面积与气象条件进行相关分析,表明马铃薯晚疫病的发生是生物因子在适宜的气象条件下发生作用的结果。气温、降水、相对湿度、日照时数等气象条件是马铃薯晚疫病发生的决定性因素。在温度适宜的情况下,阴雨连绵或多雾、多露最有利于晚疫病的发生和流行。以受灾率作为马铃薯晚疫病气象等级的划分标准,选取与晚疫病相关的前期气象要素作为预报因子,采用综合聚类法建立了马铃薯晚疫病气象等级的预报模型。回代结果表明,用气象综合聚类法类做马铃薯晚疫病的气象等级预报,可以为控制晚疫病的蔓延,赢得宝贵时间,提高气象决策服务水平。

Research of the Meteorological Grades Forecasting Method on Potato Late Blight

In this paper,the relation between the area of potato late blight and weather conditions in Weichang County during 1990-2008 was analyzed.It showed that the biological factor played a role under suitable weather conditions in the occurrence of potato late blight.Weather conditions such as temperature,precipitation,relative humidity,sunshine hours,were decisive factors for prevalence of potato late blight.The appropriate temperature,rainy or foggy weather were most conducive to late blight occurrence and pre...