已有报道,在脐橙幼果直径0.4～0.6厘米时,用高浓度BA(细胞激动素)和GA(赤霉素)涂果,保果效果显著。至于用低浓度BA加GA喷布的保果作用如何?我们于1987、1988年进行了有关试验。 试验在重庆本所进行,试材为枳砧朋娜脐橙,1984年定植,1987年始果,植株长势良好。设置5个处理:A.涂果,BA400ppm+GA500ppin;B.喷树,BA50ppm+GA50ppm;C.喷树,BA25ppm+GA50ppm; It has been reported that in the navel orange fruit 0.4 ~ 0.6 cm in diameter, with high concentrations of BA (cytokinin) and GA (gibberellin) coated fruit, fruit Paul effect is significant. As with the low concentration of BA plus GA sprayed fruit how the role? We conducted in 1987, 1988, the relevant test. The test was carried out in Chongqing, the test material for the orange angelica na navel orange, colonized in 1984, the beginning of 1987 fruits, plants grow well. Set five treatments: A. fruit coating, BA400ppm + GA500ppin; B. spray tree, BA50ppm + GA50ppm; C. spray tree, BA25ppm + GA50ppm;