采前喷施复硝酚钠对杧果果实品质和采后发病率的影响

探明采前喷施复硝酚钠对‘贵妃’杧果果实品质和采后发病率的影响,以期为复硝酚钠在杧果生产中的使用提供科学合理的理论依据。选用‘贵妃’杧果为试材,于盛花期后第15天开始喷施质量浓度为500 mg/L的复硝酚钠,每隔9~12 d喷施1次,共喷施6次。测定果实发育期间的纵横径、成熟期的单果质量、成熟过程中的果皮颜色参数（L、a、b值）、果肉硬度、可溶性固形物含量、总酸含量和果实病害等指标。试验结果表明,采前喷施复硝酚钠能够促进果实膨大,显著增加‘贵妃’杧果成熟期的单果质量,促进果实果皮转红和成熟期果皮转黄,延缓果肉硬度下降和可溶性固形物含量的上升,总酸含量基本保持不变,极大地降低了采后病害发病率和发病指数。

Effects of Pre-harvest Application of Compound Sodium Nitrophenolate on Fruit Quality and Incidence of Postharvest Desease of Mango

In order to provide a scientific and rational theoretical basis for the use of Compound Sodium Nitrophenolate in the production of mango, the effects of Compound Sodium Nitrophenolate in the pre-harvest application on fruit quality and incidence of postharvest desease of Guifei mango were explored Mango cultivar ‘Guifei’ was selected as the material. Compound Sodium Nnitrophenolate with the concentration of 500 mg/L was sprayed every 9-12 days for the first time on the 15th day after the full bloom period, and 6 times in total. Longitudinal and transverse diameters during the fruit development were measured, and the single fruit weight was determined at maturity. Color parameters (L, a, b values) of the peel during the ripening process, the hardness of the fruit pulp, the content of the soluble solids, the total acid content and the incidence of diseases were also investigated. The experimental results showed that spraying compound sodium nitrophenolate before harvesting could promote fruit enlargement, significantly increase the weight of single fruit at maturity, enhance post-harvest pigmentation, and delay the decrease of pulp hardness and the increase of soluble solids content. The total acid contents remained basically unchanged, but greatly reduced the post-harvest disease incidence and disease index.