不同植物生长调节剂对‘户太八号’葡萄果实脱落及品质的影响

Effects of Different Plant Growth Regulators on Fruit Abscission and Quality of‘Hutai No.8’Grape

以九年生‘户太八号’葡萄为试材,采用不同浓度去甲二氢愈创木酸(NDGA)、6-苄氨基嘌呤(6-BA)和2,4-表油菜素内酯(BR)处理葡萄果穗,研究了不同植物生长调节剂处理对葡萄落果率及果实外观品质和内在品质的影响,以期为‘户太八号’葡萄在新疆的栽培与推广提供参考依据。结果表明:各处理均抑制果实脱落,其中1.5 mg·L^(-1)BR处理落果率最低,为78.61%。在果实品质方面,NDGA处理降低果实的糖含量,增加果实的总酸含量,导致果实品质降低;BR和6-BA处理均提高果实品质,其中1.5 mg·L^(-1)BR处理对果实膨大效果最好,同时果实的总糖含量最高、总酸含量最低。1.0 mg·L^(-1)BR处理的果皮中酚类物质含量最高。综上所述,通过主成分分析的结果,经1.5 mg·L^(-1)BR处理的‘户太八号’落果率最低,果实品质最优。

Taking 9-year-old‘Hutai No.8’grape as the test material,grape clusters were treated with different concentrations of nordihydroguaiaretic acid(NDGA),6-benzylaminopurine(6-BA)and 2,4-epibrassinolide(BR).The effects of different plant growth regulators on fruit drop rate,appearance quality and internal quality of grape were studied,in order to provide reference for the cultivation and popularization of‘Hutai No.8’grape in Xinjiang.The results showed that all treatments inhibited fruit abscission,among which 1.5 mg·L^(-1) BR had the lowest fruit drop rate of 78.61%.In terms of fruit quality,NDGA treatment reduced the sugar content of the fruit and increased the total acid content of the fruit,resulting in a decrease in fruit quality;both BR and 6-BA treatments improved fruit quality.Among them,1.5 mg·L^(-1) BR treatment had the best fruit enlargement effect,and the total sugar content of the fruit was the highest and the total acid content was the lowest.The content of phenols in the peel treated with 1.0 mg·L^(-1) BR was the highest.In summary,through the results of principal component analysis,the fruit drop rate of‘Hutai No.8’treated with 1.5 mg·L^(-1) BR was the lowest and the fruit quality was the best.