Effect of Fruit Bag Color on Grape Quality in Facility Condition

Taking ‘Red globe'grape as teat material,by different color of fruit bags for bagging treatments,with the treatment without fruit bagging as the control(CK),the effect of different color of fruit bag on the changes of temperature,light and fruit quality of grape in solar greenhouse were studied.The results showed that different colors of fruit bags were significantly increased the proportion of light spectrum,and reduced the light radiation,the intensity of illumination.Red fruit bag raised the temperature inside the bag.The total sugar content of blue bags,green bags and white bags had no significant difference with the control.Bagging treatments were significantly lower than the control on the content of total phenolic and proanthocyanidins.Thus,bagging affected grape color.Yellow bags and red bags had more negative effect on fruit quality of grape.