套袋对晚熟桃霞晖8号果实品质的影响

摘要

The effect of different bagging treatments on the fruit quality of peach cultivar Xiahui 8 was studied by using no bag-ging as the control.The results showed that bagging treatment could change the pericarpial coloration , raise sugar-acid ratio, and improve fruit flavor .Single-layer bag or double -layer bag with yellow outside and black inside could increase the red level of peri -carp if the bags were removed before harvest .In the bagging treatment with single -layer yellow bags , the single-fruit weight was the highest , but both red color and pericarp anthocyanin content of fruits were significantly lower than those in the control .In the bagging treatment with single -layer white bags, the single-fruit weight, soluble solid content, sugar-acid ratio, red saturability, and chroma of fruits were significantly higher than those in the control; the hardness with pericarp , hardness without pericarp , brightness value, hue angle, and a*/b*value were not significantly different from those in the control;this treatment obtained bet-ter comprehensive fruit quality .In the bagging treatments with single -layer bags or double -layer bags whose color was yellow out-side and black inside , the single-fruit weight, pericarpial coloration , pericarp anthocyanin content and sugar -acid ratio of fruits were higher than those in the control , but the soluble solid content and hardness of fruits were not significantly different from those in the control;the comprehensive quality of fruits in these two bagging treatments ( especially the bagging treatment with double -layer bags) was better than that in the control .%以不套袋为对照，研究了不同类型果袋对霞晖8号桃果实品质的影响。结果表明，套袋使果实的外观着色改变，糖酸比提高，风味改善。外黄内黑单层袋、外黄内黑双层袋（采前拆袋）使果面着红色水平提高。不同果袋处理比较，黄色单层袋果实的单果重最大，但红色色泽、果皮花色素苷含量均显著低于对照，综合品质不佳，不适于长江中下游地区晚熟桃品种霞晖8号。白色单层袋果实的单果重、可溶性固性物含量、糖酸比、红色饱和度和色饱和度均显著高于对照，带皮硬度、去皮硬度、亮度值、色调角、a*／b*等与对照差异不显著，果实综合品质较好。外黄内黑单、双层袋（采前拆袋）果实的单果重、外观色泽、花色素苷含量及糖酸比均较对照高，可溶性固性物含量和硬度与对照差异不显著，综合品质优于对照，尤以外黄内黑双层袋更好。