Abstract: Field experiments were conducted on high grafting techniques of Newhall navel orange on Citrus unshiu interstock and Poncirus trifoliate rootstock. The multiple linear stepwise regression analysis revealed that the canopy volume was positively correlated with the grafting height (37~116cm) 3 years after grafting, the yield efficiency was positively correlated with the grafting height (≤54cm) and was negatively correlated with it when the grafting height was above 54cm. The yield of individual plant had unitary square function relation to the grafting height and it could be used to determine the grafting height. To evaluate the grafting techniques and to calculate the yield, it was feasible for applicating the multiple linear stepwise regression to study the high grafting techniques.

Key words: Newhall navel orange, high grafting, grafting height, bud number, multiple linear stepwise regression

摘要： 在纽荷尔脐橙/国庆一号温州蜜柑/枳生产园进行田间试验,经多元线性逐步回归分析后的结果表明,高接换种3年后,树冠体积与嫁接高度(37~116cm范围内)呈正相关;树冠产量效率在嫁接高度低于54cm时,与嫁接高度呈正相关,反之,则为负相关。单株产量是关于嫁接高度的一元二次函数,可用于确定合理的嫁接高度、评价技术效益与预测产量。研究表明,应用多元线性逐步回归分析方法研究高接换种技术是可行的。

关键词: 纽荷尔脐橙, 高接换种, 嫁接高度, 接芽数, 多元线性逐步回归分析