摘要
本文根据1986至1988年在石家庄地区田间试验的白粉病对小麦产量影响的结果,分析了不同生育期白粉病流行对产聿的影响,给出了不同小麦白粉病病情指数对产量影响的三种数学模型,即关键点模型,多点模型和曲线下面积模型。从关键点模型得知,抽穗后期病梧指数与小麦产量的相关程度最大。综合评价这三种模型,多点模型最佳。
In this paper,we developed three empirical models:critical point (CP)model,multiple point(MP)model,and area-under-curve(AUC), model based on observed yield loss data of winter wheat caused by pow- dery mildew(Erysiphe graminis D.C.f.sp.trilici)from 1986 to 1988 in Shiji- azhuang district.It was shown from CP model that the relation between disease index of late heading stage and yield of Winter wheat had the higest correlation coefficient.Evaluating the three models integrally,the MP model was the best.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1989年第4期17-20,共4页
Journal of Hebei Agricultural University
关键词
小麦
白粉病
产量
数字模型
Wheat powdery mildew
Yield loss
Critical point model
Multiple point model
Area-under-curve model
