论文部分内容阅读
运用相关与回归分析的统计方法,对2—4年生苹果幼树主干横断面积与新梢生长量两个因素的分析结果表明:其正相关系数达高度显著水平。其中国光品种的相关系数r_1=0.9668,求得新梢生长量(■_1)依主干横断面积的直线回归即经验公式■_1=892.63+174.9413X;金冠品种的相关系数r_2=0.95,其经验公式为■_2=1432.55+267.996X;红星品种的相关系数r_3=0.949,其经验公式为■_3=1739.44+228.623X。
The correlation analysis and regression analysis of the statistical methods, apple 2-4 year old apple tree trunk cross section and shoot growth of two factors analysis showed that: the positive correlation coefficient reached a significant level. The correlation coefficient r_1 = 0.9668 for Chinese light varieties, obtained the linear regression of the shoot growth (■ _1) according to the principal cross-sectional area empirical formula ■ _1 = 892.63 + 174.9413X; the correlation coefficient of golden crown varieties r_2 = 0.95, the experience The formula is ■ _2 = 1432.55 + 267.996X; the correlation coefficient of red star breed r_3 = 0.949, the empirical formula is ■ _3 = 1739.44 + 228.623X.