GA_3和2,4-D在柑桔生产中被广泛应用,但它们对柑桔叶片叶绿素含量及光合作用的影响未见报道。为此,我们1988年在广州进行了本试验。试材为1980年定植的红桔砧暗柳橙。设50×10~(-6)GA_3、20×10~(-6)2,4-D、50×10~(-6)GA_3+20×10~(-6)2,4-D3个处理(各处理均加入0.05％的吐温-20作展着剂),并以清水为对照。喷液均匀喷布于叶片正反两面,以 GA_3 and 2,4-D are widely used in citrus production, but their effects on chlorophyll content and photosynthesis of citrus have not been reported. To this end, we conducted this experiment in Guangzhou in 1988. Test material for the 1980 planting red orange anvil dark orange. The treatment of 50 × 10 -6 GA_3, 20 × 10 -6 × 2,4-D, 50 × 10 -6 GA_3 + 20 × 10 -6 2,4-D3 (0.05% Tween-20 was added as a spreading agent for each treatment), and water was taken as a control. Spray evenly sprayed on both sides of the blade to