Effect of GA3 Treatment with Different Concentrations on Fruit Quality of Zanthoxylum bungeanum Maxim."Dahongpao"During Fruit Expansion Period
Application of plant growth regulators such as GA3 has become an important cultivation manage-ment tool to improve fruit quality,but the effect of GA3 application on Zanthoxylum bungeanum Maxim."Da-hongpao"fruit quality is still unclear.In order to investigate the effect of different GA3 concentrations on the ex-ternal and internal quality of"Dahongpao"fruits during fruit expansion,the optimum GA3 spraying concentration was selected.The fruit were sprayed at 25 mg/L,50 mg/L,75 mg/L and 100 mg/L during fruit set.After har-vesting,the longitudinal and transverse diameters,the weight of 100 grains,the number of pericarp oil capsules,the total volatile oil,the amide compounds,the non-volatile ether extract and the total flavonoids were meas-ured.The results showed that the best overall results were obtained when 75 mg/L GA3 was sprayed at fruit set,and the four external quality indicators,namely longitudinal diameter,transverse diameter,100 grain weight and number of oil capsules on the fruit skin,were improved by 14%,11%,12%and 35%respectively.The four intrinsic quality indicators,namely total peel volatile oil,pineness,non-volatile ether extract and total fla-vonoids,were significantly improved by 33%,27%,13%and 11%respectively.This study screened out the optimal GA3 treatment concentration for enhancing"Dahongpao"fruit quality,providing new insights and ideas for"Dahongpao"cultivation management.
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