大果水晶梨幼树产量与植物学性状的相关及回归分析

大果水晶梨(Pyrus pyrifolia Nakai cv Suisho)的早果、丰产性与植物学性状关系密切。试验对五年生至六年生幼龄大果水晶梨树的产量与其株高、冠径、干周、树冠体积、总枝数等植物学性状的相关性进行了研究。结果表明,幼树树冠体积、结果枝数、短果枝数、总枝数、坐果数与产量均呈极显著的正相关,冠径与产量呈显著的正相关。通过逐步回归,建立了梨树植物学性状与其产量因素的最优多元回归方程。另外,对植株营养生长与生殖生长之间的关系做进一步分析后表明,坐果数小于125时,与产量呈正相关;当坐果数大于125时,与产量呈负相关。试验分析并总结出了大果水晶梨幼树的丰产树体结构。

The Correlation and Regression Analysis between Fruit Yield and Plant Characters of Young Suisho Pear Tree

The significant relationships were existed among the plant characters,early fruit and fertility of Suisho pear.In this study,the correlation of fruit yield and tree height,canopy size,trunk diameter,crown volume,total shoots and other plant characters were investigated.The results showed that the positive relationships were obtained between the yield and crown volume,fruit shoot number,short-fruit shoot number,total shoot number,fruit number.The significant positive relatioinships were obtained between canopy size and the yield.On the basis of investigation on the total shoot number,fruit number and plant yield,the best multi-regression equation was set up between plant characters and plant yield through the step regression analysis.Furthermore,the results showed that the positive correlation was existed between the nourishment growth and procreative growth when the fruit numbers were no more than 125 and the negative correlation when the fruit numbers were over 125.On the basis of investigation on the plant characters,the tree shape and structure for high yield was sum up.