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

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