瑞都科美葡萄品种在甘肃产区表现较佳，为了筛选该品种的适宜果袋类型，完善其花果管理过程，以网袋为对照，研究了白色、绿色和渐变蓝色3种不同颜色果袋内的微域环境对瑞都科美葡萄果实品质的影响。结果表明，在1 d中14:00~18:00时，渐变蓝色果袋内平均光照的日变化高于白色和绿色果袋。白色、绿色和渐变蓝色套袋后果实中的日平均温度均高于网袋。套袋后45 d时，渐变蓝色和绿色果袋处理后，果皮的L*、a*、b*值高于其他2个处理。渐变蓝色、白色和绿色果袋果实的单粒重均高于网袋，其中渐变蓝色果袋最高，比网袋高20.26%；白色果袋次之，比网袋高15.77%。3种颜色果袋处理提高了果实的固酸比，降低了可溶性固形物、可滴定酸和黄酮含量。渐变蓝色果袋处理的总糖含量较高，比网袋提高2.54%。套袋后15 d，渐变蓝色果袋果实中的多酚含量高于其他处理，比网袋高7.96%，之后开始下降；白色果袋处理在套袋后30 d急剧下降，45 d时最低。经主成分综合分析，渐变蓝色果袋改善了瑞都科美果实着色的一致性和整齐度，提高了果实品质，可应用于该品种的优质栽培生产；在光照相对弱一点的地区，可采用白色果袋。

The 'Ruidu Kemei' grape variety has shown ideal performance in Gansu production area. Aiming to screen the suitable fruit bag types with perfecting its flower and fruit management, effects of bagging using 3 different colored fruit bags (white, green, and gradient blue with the control of net bag) on the micro environment and fruit quality of 'Ruidu Kemei' grapes were studied. Results showed that the daily variation of average light intensity in the gradient blue bag was higher than that in the white and green bags between 14:00 and 18:00 in a day. The daily average temperature bagged with white, green, and gradient blue increased compared to that in the net bag. After 45 days of bagging, the L*, a*, and b* values of the peel were higher in the gradient blue and green bags compared to that in other two treatments. The berry weights of fruits in gradient blue, white, and green bags were higher than that in net bag. Among them, the gradient blue bag was the highest,20.26% higher than that in the net bag, followed by the white bag, 15.77% higher than that in the net bag. Treatment with 3 different colored fruit bags increased the solid-acid ratio of the fruits while reducing the soluble solids, titratable acidity, and flavonoid content. The gradient blue fruit bag resulted in a higher total sugar content, which was 2.54% higher compared to that in the net bag. After 15 days of bagging, the polyphenol content in the gradient blue bag was higher than that in other treatments, which was 7.96% higher than that in the net bag, after which it began to decline. The white bag treatment showed a sharp decrease in polyphenol content 30 days after bagging, reaching the lowest point at 45 days. Principal component analysis indicated that the gradient blue fruit bag could improve the uniformity and tidiness of fruit coloring in the Ruido Kemei variety, enhancing fruit quality and making it suitable for high-quality cultivation of this variety, whereas in areas with relatively weakerlight exposure, white fruit bags could be used.

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甘肃省技术创新引导计划-科技特派团专项(23CXNA0034)；国家现代农业产业技术体系资助(CARS-29-27)。