The pear variety Cuiguan was used as a test material, and effects of different bagging treatments on the fruit quality and appearance were studied.The results showed that bagging decreased the mean fruit weight (except one-time bagging with white bag)and the soluble solids content, and changed the fruit firmness.Bagging also improved the fruit surface brightness, and there were significant differences in carpodermis color between different bagging treatments.The carpodermis showed green when the fruit was bagged with white bag,white when bagged with black bag,and visible fruit rust and dull color when not bagged(CK).Bagging with black bag increased the carpodermis thickness,and bagging with white bag at the early stage made the carpodermis thin.Bagging increased the fruit dot density and decreased the fruit dot diameter.Compared with the fruit bagged with black bag,that bagged with white bag was higher in soluble solids content, smaller in fruit firmness, lower in fruit surface brightness and larger in fruit dot diameter,and had somewhat heavier green and yellow in fruit color under the same bagging period.The fruit bagged later had higher soluble solids content, smaller fruit dot density, larger fruit dot diameter, and somewhat heavier green in carpodermis color.Compared with the fruit bagged twice in the same period,that bagged once had higher soluble solids content, lower fruit surface brightness, lighter green color, smaller fruit dot density, and larger fruit dot diameter.Bagging twice at the early stage could effectively decrease the fruit dot diameter and improve the fruit appearance.%以翠冠梨为试材,研究了套袋处理对果实内在品质和外观的影响.结果表明:套袋降低了平均单果重(套一次白袋除外)和可溶性固形物含量,并改变了果实硬度.套袋提高果面亮度,不同套袋处理果皮色泽差异显著,套白袋果表呈绿色,黑袋呈白色,不套袋果(CK)果锈明显、外观暗淡;套黑袋果皮厚度增加,早期套白袋果皮变薄;套袋增加果面果点密度,减小果点直径.相同套袋时期下,套白袋处理与套黑袋处理相比果实可溶性固形物含量高,果实硬度小,果实亮度低,果实偏向绿色和黄色、果点大.套袋晚的果实可溶性固形物含量高,果表偏向绿色,果点密度小,直径大.套一次袋比同时期套两次袋的果实可溶性固形物含量高,果实亮度低,绿色度低,果点密度小,果点直径大.早期同时期套两次袋可以有效减小果点直径,改善果实外观.
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