不同蓝红光比例发光二极管对火龙果花芽分化和果实品质的影响

Effect of the blue-red light ratio in supplemental light-emitting diode on pitaya flower bud differentiation and fruit quality

以红肉火龙果‘紫蜜龙’为试验材料,设蓝光与红光比例分别为1∶8、1∶6、1∶4、1∶3、1∶2的发光二极管(lightemitting diode, LED)为实验处理,白光LED作对照进行补光(CK),光源分置在50 cm和70 cm这2个高度;同时设置不补光对照(CK_0)。通过比较不同处理间的花芽分化、物候期、果实品质,筛选出能够促进春季提前现蕾、增加花芽数量及提高果实品质的最佳补光方案。结果表明:补光处理分化的花芽数量比不补光多;蓝光与红光比例1∶4、光源高度50 cm的组合,花芽分化数量最多,产量显著高于其他处理,平均单产达到了2.236 kg/株;蓝光与红光比例1∶2、光源高度50 cm的组合,果实可溶性固形物含量相对最高,品质最佳。

Taking a red pitaya cultivar,'Zimilong'as the test material,we set up different blue-red light ratios in light-emitting diode(LED),1∶8,1∶6,1∶4,1∶3 and 1∶2 to treat the pitaya and used white LED light as the control(CK).Besides,the light sources were placed at two positions,50 cm and 70 cm above the plant.We also set up no artificial light group as a blank control(CK0).By comparing the flower bud differentiation,phenology and fruit quality,we attempted to choose the best light supplement that would advance spring budding,increase the amount of buds and also improve the quality in pitaya.The result revealed that flower bud differentiation was improved when given light fill.In addition,when the blue-red light ratio in LED light was 1∶4 at 50 cm above the plant,the number of buds and productivity were best among all treatments,and the average yield even reached 2.236 kg/plant.When the blue-red light ratio in LED light was 1∶2 at 50 cm above the plant,the total soluble solid content and fruit quality were the highest.