吲熟酯对藤稔葡萄疏果和内源激素及果实品质的影响

在 ６ 年生藤稔葡萄花后 ５ ｄ，果穗喷布 ５０～４００ ｍ ｇ／ Ｌ 的 吲熟酯，疏果率达 到 １１６％ ～４３７％ ，且浓度越高，疏果率越高，但浓度达到 １００ ｍ ｇ ／ Ｌ 时，出现药害 于盛花期、谢花末期、花后 ５ ｄ 分别喷布５０ ｍ ｇ／ Ｌ 的 吲熟酯，疏果 率达 １１８％ ～４００％ ，喷布时 间越早，疏果 率越高，其 中谢花 末期 喷布的 疏果率与 人 工疏 果 相似 ，同 时单 果 重增 加 ３９１ ～６３８ ｇ， 可 溶性 固 形 物提 高 １３％ ～ １９％ ， 含 酸量 降 低０２９％ ～０４８％ ，果实商 品价值显 著提高 据 对盛花期 喷布 ５０ ｍ ｇ／ Ｌ 的处 理调查 分析，吲 熟酯使 藤稔葡萄幼果内乙烯与 Ａ Ｂ Ａ 的含量分别提高 ７５０％ ～１１６７％ 和 ６８８％ ～１６６８％ ，从而加速幼果的脱落，落果高峰比对 照提前 ２ ｄ 出现 从疏果程度与 果实品质 两方面考 虑，生产上 应选谢花末 期喷布吲 熟酯５０ ｍ ｇ／ Ｌ 为宜

Effect of Figaron on fruit thinning, endogenous hormone and fruit quality of Tengren grape

Application of Figaron at the concentrations from 50~400 mg/L to the flower clusters of six year old Tengren grapes at the fifth day of postbloo resulted in 11 6%~43 7% fruit thinning The higher the concentration of Figaron, the higher the thinning ratio Toxic symptoms were observed when the concentrations of Figaron were more than 100 mg/L Spraying with 50 mg/L Figaron to flower clusters at full bloom, final stage of flower abscission, the fifth day of postbloom respectively resulted in 11 8%~40 0% of thinning ratio The earlier Figaron was provided, the higher the thinning ratio was Spraying with 50 mg/L at final stage of flower abscission got the similar result to the hand thinning The quality of berries were improved by an increasing of 3 91~6 38 g in berry weight and 1 3%~1 4% of total soluble solides (Tss)and a reducing of 0 29%~0 48% in titration acid Furthermore, the results showed that spraying with 50 mg/L Figaron at full bloom, contents of ethylene and abscisic acid in young berries increased by 75 0%~116 7% and 68 8%~166 8% respectively A peak of berry drop was 2 days earlier than that of the control Therefore, 50 mg/L Figaron spraying at final stage of flower abscission is recommended in Tengren grape production