摘要
通过对常用园林绿化树种烂皮病的调查分析,不同树种对烂皮病的感发程度有差异,中黑防Populus deltoides×P.cathayana、小黑杨P.×xiaohei、垂柳Salix babylonica、梓树Catalpa ovata等为易感病树种,而山槐Maackia amurensis、山桃稠李Prunus maackii、白榆Ulmus pumila未见有发病植株;垂柳的发病程度与树龄大小无关。用多元回归计算出垂柳烂皮病发生程度与单株透气面积与地径处断面积之比、冠高比、土壤容重、pH值、全盐量、有机质的关系;利用逐步回归方法计算出病害等级为1(无病)时各因子的具体数值。并利用6 a的气象数据与垂柳烂皮病的病情指数进行逐步回归分析,得出在诸气候因子中,春季降水量对烂皮病的发生影响最显著。
Investigation of the canker disease of the landscaping trees infected by Valsa sordida in Qiqiha＇er and Daqing, Heilongjiang Province was carried out, the results showed that occurrance degree of all species infected by Valsa sordida were different. Populus deltoides×P.cathayana, Populus×xiaohei T. S. Hwang ex Ling, Salix babylonica Linn. , Catalpa ovata were susceptible, but Maackia amurensis Rupr. et Maxim, Prunus maackii Rupz. , Ulmus pumila Linn. were resistant. The infected degree of Salix babylonica was not relative to its age. The relation between the occurrence of the willow canker disease and the ratioes of individual aerate area to cross section at the base diameter, crown to the height of tree, and ratio of bulk density, pH value, salt content, organic matter in soil were presented by means of multiple regression analysis. The stepwise regression analysis on the basis of six years＇ meteorological data and the disease index of the willow canker was made, the result showed that among all climatic factors the precipitation in spring had significant influence on the occurrence of the disease.
出处
《中国森林病虫》
北大核心
2006年第4期11-15,共5页
Forest Pest and Disease
关键词
园林绿化
烂皮病
发生规律
病原菌
landscaping
canker disease
occurrence regularity
Valsa sodida Nits
