摘要
１９８８—１９９２年，在黑龙江省北部研究了与大豆菌核病发病率显著相关的因子。在菌核病史较重的田块中，大豆菌核病的发病率和大豆开花期间的气象因子，表现了显著的相关。经电子计算机进行多元逐步回归分析，建立了大豆菌核病年发病程度拟合方程：Ｙ＝－１２８．３２８＋０．１１５５１ｘ１＋４．０６０６４ｘ２－０．１２５６９ｘ３，复相关系数Ｒ＝０．９９９９９３，经检验，理论值和实际调查值拟合很好。通过大豆盛花期间田间多点次子囊盘数量及后期对应点次的发病率调查，建立了子囊盘数量和发病率间的指数回归拟合方程：Ｙ＝７．７８２１．ｅ０．０３９６ｘ，从而为大豆菌核病中、短期预测提供了可能。
Factors influncing the disease incidence of stem rot of soybean (Glycine max)caused by sclerotinia sclerotiorum were studied for five years in north part of Heilongjiang province.The correlation model between disease incidence and weather factors during blossom stage were stablished.Through stepwise miltiple regvession caleulation by computer.The model y=-128. 328 +0. 11551x1 + 4. 06064x2-0.12569x3,R = 0. 99993 could predict the seventy of disease epidemics. Good fitness was found between the observed and theoretical values.The exponential regression equation,y=7.7821. e0. 0396x,was developed to predict epidemics with the numbers of apothecia during blossom stage of soybean. Therefore mid and shorts term predicting for the disease would be possible.
出处
《大豆科学》
CSCD
北大核心
1994年第1期48-52,共5页
Soybean Science
基金
国家自然科学基金
关键词
大豆
菌核病
子囊盘
预测
Soybean
Stem rot
Apothecia
Correlation
Predicting
