供试品种为沙田柚，砧木材料２８个，以酸柚砧作对照，研究了不同砧木上沙田柚树体生长发育、产量的早期表现。经过７年的观察分析，初步认为关云大叶枳、江津大叶枳、多花枳、朱砂柑、摩洛哥酸橙对沙田柚有早结、矮化作用。定植后第３年试花，第４年开始结果，结果最多的是关云大叶枳，株产达４个，树体高度比对照矮１１．８％～２１．０％，产量比对照高２４０％～６００％。其余砧木都比对照结果迟。 The tested cultivars were pomelo and rootstocks, and 28 were used as the control. The growth and development of grapefruit trees on different rootstocks and the early yield performance were studied. After seven years of observation and analysis, it has been preliminarily believed that there are early knotting and dwarfing effects on the leaves of Shatin pummelo for the first time in Guan Yun’s Ye Zhi Ye, Jiang Ye’s Ye Ye Zhuan, Trifoliate Orange, Juglans mandarin and Moroccan lime. In the third year after planting, flowers were tested in the fourth year. The results were as follows: the highest one was in the leaves of Guan Yun, the number of which reached 4, the height of the tree was 11.8% ~ 21.0% shorter than the control, and the yield was higher than the control 240% ~ 600%. The remaining rootstocks are later than the control results.