【摘要】 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r₁=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r₂=0.95,其经验公式为■₂=1432.55+267.996X;红星品种的相关系数r₃=0.949,其经验公式为■₃=1739.44+228.623X。更多还原

【Abstract】 Two factors of trunk cross area and growing quantity of new growths in 2—4 years apple trees were analysed using statistical methods of correlation and regression analyses,The results showed that the positive correlation coefficients were highly significant. The correlation coefficient of variety Ralls was r₁=0.9668, growing quantity of new growths （（?）₁） according to linear regression of trunk cross area, i.e. the empiricai formula, was （?）₁=892.63+174.9713X; the correlation coefficient of variety Golden Dilicious was r₂=0.95, the empirical formula （?）₂=142.55+267.996X; the correlation coefficient of Starking was r₃=0.949, empirical formula （?）₃ = 1739.44+228.623X.更多还原