‘徐香’猕猴桃叶面积回归测定方法

New Regression Mensuration Method for Estimation of Leaf Area of‘Xuxiang’Kiwifruit

以6年生‘徐香’猕猴桃为试材,研究了叶长(L)、叶宽(W)、长宽乘积(L×W)与单片叶面积(S),新梢的长度、叶片数目与其总叶面积的相关性。结果表明:单片叶面积与长宽乘积的线性回归关系达极显著水平,决定系数达0.9651,其次是叶宽,决定系数为0.8896,最后是叶长,决定系数为0.7509,因此可以用长宽乘积所得的回归方程来计算单叶面积。新梢叶片数目与其总叶面积呈幂函数关系,决定系数是0.8131,新梢长度与其总叶面积相关性较差,决定系数仅0.3973,前者更佳。因而在生产中,可以通过测量长宽来计算单片叶面积,通过统计每个新梢上的叶片数目计算新梢总的叶面积,进而计算整株的叶面积。该方法操作简单,且活体测量,具有较高的应用价值。

This research described a new regression mensuration method for estimation of leaf area in Acitinidia deliciosa cv. ‘Xuxiang’. We investigated the correlation between single leaf area and leaf length, leaf width or their multiplication, and the correlation between total leaf area and shoot length or leaf number. The results showed that there was a high correlation coefficient between single leaf area and the multiplication of leaf length and width (R2=0.9651), and followed by leaf width (R2=0.8996) and leaf...