Abstract: To investigate the regulatory effects of different plant growth regulator treatments on the fruit quality of Ilex verticillata ‘Oosterwijk’，2‑year‑old potted seedlings were utilized as materials.Prohexadione‑calcium and mepiquat chloride were mixed in varying concentrations，and their effects were compared with different concentrations of uniconazole and paclobutrazol，along with a control group treated with water.Spraying was conducted on the entire leaf surface during the first fruit enlargement period and ripening stage after fruit setting，followed by sampling upon maturity. Morphological indicators such as fruit length，width，single fruit weight，and moisture content were measured，along with peel chromaticity and fruit hardness. Additionally，pigment contents including chlorophyll，carotenoid，anthocyanin，along with flavonoid content，soluble sugar content，and vitamin C content were determined，for conducting inter‑indicator correlation analyses. The effects of each treatment were analyzed using the membership function method. Results indicated that the fruit shape index after treatment with various agents exceeded that of the control，suggesting a trend towards regular and plump fruit shape. The highest single fruit weight was observed under T4 treatment（5% uniconazole 3.30 g/L），with an average of 0.44 g.The treatment with the highest average moisture content was T3（5% prohexadione‑calcium 0.67 g/L+98% mepiquat chloride 0.30 g/L），with a content of 65.73%. All treatments enhanced fruit brightness and color saturation，with the highest L^* and a^* values observed under T5 treatment（5% uniconazole 2.00 g/L）treatment.However，there was no significant difference in b^* values among treatments.The highest carotenoid content was recorded under T1 treatment（5% prohexadione‑calcium 2.00 g/L+98% mepiquat chloride 1.00 g/L），at 0.022 mg/g. Treatment T5 showed a significant increase in anthocyanin content compared to the control，reaching 190.57 μg/g. The total flavonoid content of I.verticillata‘Oosterwijk’fruits showed an initial increase followed by a decrease with increasing spray concentration of the agents，with the highest soluble sugar content observed under T2 treatment（5% prohexadione‑calcium 1.30 g/L+98% mepiquat chloride 0.67 g/L）.The highest vitamin C content was observed under T3 treatment，with an increase of 38.34% compared to the control group.The rankings of membership function values for each treatment group were T5>T2=T7>T3>T4>T6>T1>CK，indicating that spraying twice with 5% uniconazole at 2.00 g/L during fruit enlargement and ripening stages resulted in the optimal fruit quality.

Key words: Ilex verticillata, Plant growth regulator, Fruit quality, Physiological characteristics

摘要： 为研究不同生长调节剂处理对北美冬青果实品质的调控效果，以2年生北美冬青奥斯特地栽苗为材料，将调环酸钙与甲哌鎓进行不同质量浓度的混配，与不同质量浓度的烯效唑和多效唑对比调控效果，并设置清水对照。在北美冬青坐果后的第1次果实膨大期和转色期对全株叶片表面进行喷施，成熟后采样，测定果实横纵径、单果鲜质量、含水量等形态指标以及果皮色度值和果实硬度值，并对果实叶绿素、类胡萝卜素、花青素等色素含量进行测定，结合果实黄酮含量、可溶性糖含量、维生素C含量等内含物指标，进行指标间相关性分析，采用隶属函数法对各处理效果进行评价。结果表明，经药剂处理后的果实果形指数均大于对照，表明各处理都有使果实形状规整、饱满的趋势；T4处理（5%烯效唑3.30g/L）处理的单果鲜质量最高，平均单果鲜质量为0.44 g；果实平均含水量最高的处理为T3（5%调环酸钙0.67 g/L+98%甲哌鎓0.30 g/L），含水量为65.73%。各处理均能提高果实亮度，使色泽鲜艳，其中T5处理（5%烯效唑2.00 g/L）下的果实L^*和a^*均最高，各处理下的果实b^*无显著差异。T1处理（5%调环酸钙2.00 g/L+98%甲哌鎓1.00 g/L）的类胡萝卜素含量最高，为0.022 mg/g；T5处理花青素含量较对照显著提高，为190.57 μg/g；果实总黄酮含量随着药剂喷施浓度的升高呈现先升高后降低的趋势；T2处理（5%调环酸钙1.30 g/L+98%甲哌鎓0.67 g/L）的果实可溶性糖含量最高；T3处理的维生素C含量最高，较对照提高38.34%。各处理组的隶属函数值排名依次为T5>T2=T7>T3>T4>T6>T1>CK，表明在果实膨大期和转色期分别喷施2次5%烯效唑2.00 g/L，果实品质效果最优。

关键词: 北美冬青, 植物生长调节剂, 果实品质, 生理特性