Effects of flower-forcing treatment at different time on the fruit quality of pineapple'Tainong 17'
In order to clarify the effects of flower-forcing treatment at different time on the yield,quality and key endogenous hormones of fruits of pineapple'Tainong 17',flower-forcing treatment was carried out at different time in August and mid-September 2022.Pineapple plants were treated with 2.0％calcium carbide solution at night for 3-5 s at an interval of 1 day in the field.The normal fruit rate,plant dry matter,yield quality and endogenous hormone content of pineapple after forced flowering were determined and their differences were statistically analyzed.The results showed that the maturing time of pineapple fruits in mid-September was about 30 days longer than that in mid-August,and that the proportion of deformed fruits without crowns and multiple crowns in mid-September was 31.33％less than in mid-August.The dry matter accumulation,yield,sugar-acid ratio and soluble protein content of the fruits in the mid-September flower-forcing treatment increased by 6.63％,25.75％,23.73％and 50.36％,respectively,and the titratable acid decreased by 14.71％.Compared with the flower-forcing treatment in mid-August,the contents of gibberellin,abscisic acid and trans-zeatin in the fruit of the mid-September treatment were significantly reduced,and the contents of jasmonic acid in the deformed fruit without crowns were significantly increased by 120.93％,and the abscisic acid content in the normal fruits was significantly reduced.In the normal fruits the content of salicylic acid was decreased by 18.18％and 54.81％,respectively,and the content of trans-zeatin was significantly increased by 27.91％.Comprehensive analysis showed that the pineapple'Tainong 17'was higher in fruit quality and yield when forced to flower in mid-September.
pineappleflower forcing treatment at different timequalityyieldendogenous hormones
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