摘要
根据病害调查的结果、选择与病害密切相关的９项气象因子为指标；通过对东北地区５２个市县进行聚类分析．将东北地区杨树冰核细菌溃疡病的危险等级划分为重发区、常发区、偶发区和不发区４级．与病害调查的实际情况基本一致。
According to the investigation of poplar ice nucleation bacterial canker and the result of clustinganalysis of 52 counties and cities in northeast China, the risk grade of this disease was divided into 4districts. which was seriously occurring district. commonly occurring district. occasionally occurring andunoccurring districts by selecting nine weather factors closely correlated to the bacterial canker. It was almost indentical with the fact of disease investigation result in field.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1999年第4期18-23,共6页
Journal of Northeast Forestry University
基金
国家"八五"
"九五"科技攻关项目
关键词
杨树
冰核细菌溃疡
危险等级划分
oplar. Ice nucleation bacterial canker
Division of the risk grade
