摘要
采用逐步回归的统计方法，对上海市红星农场１９９８年小麦春季冻害资料进行了研究分析。结果表明，小麦幼穗冻死率（其ｌｏｇｉｓｔｉｃ转换值为Ｙ）与小麦品种（Ｘ３）和第一次穗肥施用时间（Ｘ８）密切相关，与第二次穗肥施用时间（Ｘ(１０)）也有不可忽视的重要关系。其相关回归式为Ｙ＝－４.２１７０－１．４９５９Ｘ３＋０．３１２４Ｘ8－０．１９２３Ｘ(１０)Ｒ＝０．５２０７，Ｆ＝４．０９２１。
Using the statistical method of stepwise regression,the data of spring cold injury of wheat in 1998 in Shanghai Hongxing Farm were investigated and analyzed. The results indicate that the cold mortality of young spikes(its logistic transformed value being Y)is closely correlated to wheat variety(X3)and application time of first earing dressing(X8) ;besides it has also a nonnegligible important relation to the application time of second earingdressing (X10). The correlation regression equation is: Y=- 4. 2170-1. 4959 X3 + 0. 3124X8-0. 1923X10,R= 0. 5207,F=4. 0921.
出处
《上海农业学报》
CSCD
1999年第1期39-43,共5页
Acta Agriculturae Shanghai
关键词
小麦
春季冻害
回归分析
影响因素
Wheat
Spring cold injury
Factor
Regression analysis
