Effects of 0.136％ Gibberellic Acid·Indol-3-Ylacetic Acid Brassinolide Wettable Powder on Grape Growth Indicators,Yield,and Quality
The aim of this study is to evaluate the effects of 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide wettable powder on the germination uniformity,fruit size,fruit cluster length and weight,yield and quality of Kyoho grape,and to explore its safety and potential application in grape production.Kyoho grape was used as the test material,and the stem leaf spray method was used to apply plant growth regulators once at the germination stage,the early stage of fruit expansion,and the color changing stage respectively.The effects of 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide WP with different concentrations on the growth ini-cators,yield and quality of grape were studied with 75％gibberellic acid JJF,0.01％brassinolide SL,and 1.2％indobutyric acid AS as the single controls,and water treatment as the blank control.The results showed that 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide WP was safe to grape under the experimental condition.Different concentrations of treatment had a significant effect on grape growth indicators and yield,but had no significant effect on grape color changing and fruit quality.Appropriate concentration treatment can effec-tively improve germination uniformity,fruit size,single fruit weight,fruit cluster length and weight,significantly reduce berry size index,and significantly increase yield.Among them,treatment Ⅳ(spraying 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide WP 1 750 times solution at the germination stage,spray-ing 3 750 times solution at the early stage of fruit expansion and the color changing stage)had the best effect.Treatment Ⅲ(spraying 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide WP 2 500 times solution at the germination stage,spraying 5 000 times solu-tion at the early stage of fruit expansion and the color changing stage)was more economical,with a yield in-crease rate of more than 10％compared to the blank control for two consecutive years.The research results can provide effective basis for the use of 0.136％gibberellic acid·indol-3-ylacetic acid·brassinolide WP in produc-tion to promote grape quality improvement and yield increase.
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