摘要
采用五因素 (1 2实施 )二次正交旋转组合设计方法 ,在田间实施氮肥、磷肥、钾肥、密度和氮肥施用期对水稻纹枯病病情指数的影响进行了研究 ,并建立了病情指数 (Y)与几个因素的回归方程 ,回归方程为Y =12 .370 91- 1.6 6 75X2 - 1.716 2 5X1X3 。结果表明 ,氮肥、磷肥和钾肥对纹枯病的病情指数影响大 ,而穗肥施用期和密度对纹枯病的病情指数影响不大 ;不同因素间存在交互作用 。
The experiment designed by using table of quadratic orthogonal rotation arrays to study the effect of epidemic factors of rice sheath blight,several factors were used in our experiment:nitrogen fertlizer,phosphorus fertlizer,potash fertilizer,density and using nitrogen fertilizer periodicaly at the ear stage.The regression equation between disease index (Y) and following factor such as:nitrogen fertlizer(X 1),phosphorus fertilizer(X 2),potash fertilizer(X 3)was Y=12.37091-1.6675X 2-1.71625X 1X 3.The results showed that nitrogen fertilizer,phosphours fertilizer and potash fertilizer played a great role to the happening of Shb.Density and using fertilizer periodically at the ear stage played little role on the incidence of Shb.The results also showed that there lies interaction between different factors.We found that the interaction between nitrogen fertilizer and potash fertilizer was the greatest one.
出处
《吉林农业科学》
CSCD
2000年第2期50-52,共3页
Journal of Jilin Agricultural Sciences
关键词
水稻纹枯病
流行因素
肥料
栽植密度
Sheath blight of rice
Epidemic factors
Regression equation
