Effects of Light Quality on Fruit Quality of Blueberry
Using blueberry'Eureka'as experimental material,the effects of five light quality treatment combinations on blueberry fruit quality were studied to provide theoretical basis for scientific production.The results showed that,compared with the control,the single fruit weight,vertical and horizontal diameter,total anthocyanin and total flavonol content of treatment T2(the light intensity is 28 μmol/(m2·s),and the spectrum is red:blue light=5:1,single power 27 W,length 1220 mm lamp is placed side by side at 30 cm at the top of blueberry plant)were the highest,which were higher than those of the control(no lamp tube),but the difference was not significant.The solid-acid ratio and sugar-acid ratio of treatment T4(the light intensity is 21 μmol/(m2·s)and the spectrum is red:blue light=1.4:1,single power 16 W,length 1080 mm lamp is placed side by side at the top 30 cm of blueberry plant)were significantly higher than those of the control,the content of total acid(citric acid,malic acid,shikimic acid)was significantly lower than that of the control,and the hardness and soluble solids content of treatment T4 were the highest,higher than that of the control,but the difference was not significant.The total sugar content(glucose,fructose,sucrose)of treatment T5(The light intensity is 21 μmol/(m2·s),and the spectrum is red:blue light=1.4:1,single power 16 W,length 1080 mm,two rows side by side at the top 30 cm of the blueberry plant,and one row of lights at the bottom(along the blueberry basin).was the highest,which was significantly higher than that of the control.The comprehensive score of treatment T4 was the highest.Treatment T4 had the best effect on improving the fruit quality of blueberry,that is side by side at the distance from the 30 cm at the top of the blueberry plant,two rows of lamps with a light intensity of 21 μmol/(m2·s),and a spectrum of red light:blue light=1.4:1,single power 16 W,length 1080 mm.
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