摘要
通过对7种不同抗病性苜蓿品种田间叶部病害病情指数的调查及其产量损失的测定,研究了病情指数(X)与产量损失率(Y)之间的关系。病情指数与产量损失率之间呈正相关关系,苜蓿易感病品种、一般感病品种及较耐病品种三种不同抗性品种产量损失预测方程分别为:易感病品种Y=6.145+1.263X;一般感病品种Y=3.429+1.550X;较耐病品种Y=1.780X-0.957。
The relationship between the disease index（X） and yield loss rate（Y） was studied through the investigation of leaf disease index in seven different disease-resisitant kinds of alfalfa varieties and the yield loss assessment. The disease index was positively correlated to yield loss rate, equations of yield loss forecast were established： disease susceptible variety Y= 6. 145 ＋ 1. 263X; disease medium-infected variety Y=3. 429＋1. 550X; disease tolerant variety Y=1. 780X-0. 957.
出处
《中国草地学报》
CSCD
北大核心
2009年第1期40-44,共5页
Chinese Journal of Grassland
基金
国家科技支撑项目(2006BAD16B04-1)
国家奶业项目(2006BAD04A04-03-07)
关键词
苜蓿叶斑病
病情指数
产量损失
预测
Alfalfa leafspot disease
Disease index
Yield loss
Forecast
