摘要
本文探讨了植物病害普遍率与严重度关系(I…S),并根据单利式和复利式病害的流行特征,提出了以下二个模型: (1) S=Smax/[1+a(1-I)~b] (2) S=Smax/[1+a((1-I)/I)~b] 这里,a、b均为大于零的常数,Smax为严重度的最大值,小于或等于1。文中对单季稻纹枯病,小麦赤霉病和油菜菌核病等的多组I…S关系数据进行拟合,并与Gompertz衍生模型(王振中等,1987)作了比较,表明(2)式拟合效果最佳。
The relationships between disease incidence and severity was studied. The two models, based on simple interest and compound interest diseases, were deduced to describe the I-S relationships as follows: (1) S = Smax/[1+a(1-1)~b] (1) (2) S=Smax/{1+a[1-1)/1]~b} (2)Here Smax, a and b>O, S_(max) (C<S≤1) was defined as the maximum of disease severity. In this paper, twenty sets of data of diseases were used for comparison between the Gompertz derived model and the two models as above, the results showed that the modle (2) is the fittest to the experimental data.
出处
《植物病理学报》
CAS
CSCD
北大核心
1991年第2期151-154,共4页
Acta Phytopathologica Sinica
