This research focused on physiochemical and nutritional properties and functional characterization of three cultivars of yuzu—Native, Tadanishiki yuzu, and Namhae1—during different seasons. According to the cultivar and harvest time, yuzu cultivars were analyzed for free sugar, dietary fiber, hesperidin, naringin, and flavonoid content as well as antioxidant and antihypertensive activity. During November, Namhae1 exhibited the highest fruit weight, °Brix/acidity ratio, and total dietary fiber content. Tadanishiki contained the highest fructose and sucrose levels, pectin and cellulose contents, and soluble dietary fiber. Tadanishiki also had the highest hesperidin content in October, while the naringin content and antioxidant activity were the greatest in November. Antihypertensive activity was also the strongest for Tadanishiki, which was picked in October and November. These results indicated that Tadanishiki in October or November was the best for consumption or favorable processing because of its excellent product quality and high levels of nutritional and functional compounds.

本研究重点研究了三种柚子品种——Native、Tadanishiki yuzu 和 Namhae1——在不同季节的理化和营养特性以及功能特性。根据品种和采收时间，分析了柚子品种的游离糖、膳食纤维、橙皮苷、柚皮苷、黄酮含量以及抗氧化和降压活性。在 11 月，Namhae1 的果实重量、°Brix/酸度比和总膳食纤维含量最高。Tadanishiki 含有最高的果糖和蔗糖含量、果胶和纤维素含量以及可溶性膳食纤维。Tadanishiki 的橙皮苷含量也在 10 月份最高，而柚皮苷含量和抗氧化活性在 11 月份最高。抗高血压活性也是忠锦最强的，这是在十月和十一月采摘的。这些结果表明，10 月或 11 月的忠锦因其优良的产品质量和高水平的营养和功能性化合物，是食用或加工的最佳选择。