六个中晚熟梨品种叶面积回归方程的建立

Regression Equation of Leaf Area of 6 Middle-Late Pear Cultivars

以6个中晚熟梨品种黄花、金水1号、玉绿、华梨1号、湘南、黄金梨的成熟叶片为材料,研究了不同梨品种叶片长(x1)、叶片宽(x2)、叶片长×叶片宽与叶面积(y)的关系。建立了6个中晚熟梨品种叶面积回归方程。结果显示,所有叶面积回归方程的相关系数和复相关系数均呈极显著水平,均可作为测算不同梨品种叶面积的回归方程,不过在具体应用时可根据所要求的精确度和测定时的工作量进行选择。6个中晚熟梨品种测算较为精确的叶面积回归方程分别为黄花y=58.20x1-1 135.00、金水1号y=28.066x2+0.535 x1x2-1 122.320、玉绿y=0.645 5x1x2+27.092 0、华梨1号y=0.640 0x1x2+121.790 0、湘南y=-25.129x1+0.816x1x2+1 517.810、黄金梨y=-17.753x1+0.765x1x2+994.680。

The correlations between leaf area and leaf length,leaf width,leaf length×leaf width were analyzed by measuring the climax leaves of 6 middle-late pear cultivars,Huanghua,Jinshui No.1,Yulv,Huali No.1,Xiangnan and Huangjin.The regression equations of leaf area of 6 middle-late pear cultivars were established,of which the correlation coefficient and multiple correlation coefficients were at the very significant level,thus could be applied for calculating the leaf area of different cultivars.However,choice of the regress equation should be make in actual application according to the accuracy demand and work load of measurement.The regression equations of leaf area for the 6 middle-late pear cultivars of relatively high accuracy were,Huanghua,y=58.20x1-1 135.00;Jinshui No.1,y=28.066x2＋0.535x1x2-1 122.320;Yulv,y=0.645 5x1x2＋27.092 0;Huali No.1,y=0.640 0x1x2＋121.790 0;Xiangnan,y=-25.129x1＋0.816x1x2＋1 517.810;Huangjin,y=-17.753x1＋0.765x1x2＋994.680.