根据脐橙果实生长发育规律 ,在每次生长高峰期前5～ 7d ,通过一次叶面追肥和根浇肥水处理 ,结果表明 :朋娜、纽荷尔、脐血橙与对照相比 ,分别增产 1 9.87% ,1 6 .5 7% ,1 2 .93% ;特级、一级、二级果分别提高 9% ,1 1 .6 % ,1 1 .8% ;果汁率分别提高 8.30 % ,7.1 8% ,8.6 4% ;全糖分别提高 1 .0 5 % ,1 .3% ,0 .76 % ;可溶性固形物分别提高 1 .1 % ,1 .4% ,0 .9%。能显著地减少裂果 ,控制效果好 According to the law of growth and development of navel orange fruit, five foliage topdressing and topdressing fertilizers were applied five to seven days before the peak growth period respectively. The results showed that compared with the control, the yield of Pina, Newhall and umbilical blood orange increased by 1 9.87%, 16.57% and 12.33% respectively; the premium grade, the first grade and the second grade fruits increased by 9%, 11.6% and 11.8% respectively; the juice percentage increased by 8.30% and 7.18 % And 8.6 4%, respectively. The total sugar increased by 1.05%, 1.3% and 0.76% respectively. The soluble solids increased by 1.1%, 1.4% and 0.9% respectively. Can significantly reduce the crack fruit, control effect is good