Application of plant growth regulators on Vitis labruscana× V.vinifera'Shine-Muscat'
In order to determine the application effects of 3 plant growth regulators,gibberellin(GA3),chlorpyriuren(CPPU)and thiaphenone(TDZ)on Vitis labruscana× V.vinifera'Shine-Muscat',it was used as experimental materiasand.The pre-flower protection was treated with(2 mg/L GA3+2 mg/L CPPU)(B1)and(2 mg/L GA3+2 mg/L TDZ)(B2).Non-nuclear treatment was performed with the combination of(25 mg/L GA3+2 mg/L CPPU)(W1)and(10 mg/L GA3+4 mg/L TDZ)(W2).The bulking treatment was performed with 3 combinations of 25 mg/L GA3+4 mg/L CPPU+2 mg/L TDZ(P1),(25 mg/L GA3+3 mg/L CPPU)(P2)and(25 mg/L GA3+3 mg/L TDZ)(P3).After treatment,the average grain weight content and sugar were measured and the taste was evaluated.The result showed that,after 2 days of seedless treatment of W1+after 12 days of seedless treatment of P2,the average grain weight of expermental varieties reached 13.78 g and the grapes had an early maturity;50％-60％of flowers were treated with bud protection before flowering B2+nucle-free treatment within 5-7 days after flowering W2+expanded treatment P2 about 12 days after nucle-free treatment,the average grain weight of expermental varieties was 18.22 g and the sugar content was more than 19 Brix％,and the ripening stage was not significantly delayed compared with other large-grain schemes.The combination of the above two treatments had high application value.
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