Abstract Raspberry fruit is a source of vitamin C. Vitamin C has antioxidant properties and can neutralize the negative effects of oxidative stress. The aim of this study was therefore to compare the content of vitamin C, sugars and organic acids in organic vs. conventional raspberries and to determine the effects of harvest time and cultivar on the contents of these compounds. The experiment was carried out in 2013–2014. Fruits from four raspberry cultivars ('Laszka', 'Glen Ample', 'Glen Fine' and 'Tulameen') were collected in the summer, and fruits of the 'Polka' cv. were collected in the autumn. The experiment was carried out on three organic farms and three conventional farms. The vitamin C, sugars and organic acids contents were determined using the HPLC method. The conventional raspberries grown in 2013 contained a significantly greater vitamin C (40.5 mg/100 g FW) and dehydroascorbic acid (35.8 g/100 g FW) content compared to organic raspberries (33.7 mg/100 g FW and 29.2 mg/100 g FW, respectively). We observed an effect of the cultivar on the total organic acids and citric acid content in raspberry fruit in 2013 and 2014. ‘Laszka’ cv. (1720 mg/100 g FW and 1650 mg/100 g FW) and ‘Glen Fine’ cv. (1740 mg/100 g FW and 1710 mg/100 g FW) fruits contained significantly more total organic acids and citric acid (1680 mg/100 g FW and 1610 mg/100 g FW) as well (1680 mg/100 g FW and 1670 mg/100 g FW) compared to the other experimental cultivars. However, the 2014 ‘Tulameen’ cv. was characterized by the highest levels of total sugars (14.9 g/100 g FW) and sucrose (5.0 g/100 g FW) content. The conventional raspberry fruits (55.4 mg/100 g FW) harvested in the autumn of 2014 contained a significantly greater malic acid content compared to organic fruits (46.2 mg/100 g FW).

中文翻译：

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有机和常规生产不同树莓品种的营养价值和维生素C含量

摘要 覆盆子果实是维生素 C 的来源。维生素 C 具有抗氧化特性，可以中和氧化应激的负面影响。因此，本研究的目的是比较有机覆盆子和传统覆盆子中维生素 C、糖和有机酸的含量，并确定收获时间和品种对这些化合物含量的影响。该实验于 2013-2014 年进行。四个覆盆子品种（“Laszka”、“Glen Ample”、“Glen Fine”和“Tulameen”）的果实是在夏季采集的，而“Polka”品种的果实。秋天收集的。该实验在三个有机农场和三个常规农场进行。维生素C、糖类和有机酸含量采用高效液相色谱法测定。与有机覆盆子（33.7 mg/100 g FW 和 29.2 mg/100 g FW）相比，2013 年种植的传统覆盆子含有显着更高的维生素 C（40.5 mg/100 g FW）和脱氢抗坏血酸（35.8 g/100 g FW） ， 分别）。我们在 2013 年和 2014 年观察了该品种对覆盆子果实中总有机酸和柠檬酸含量的影响。'Laszka' cv。(1720 mg/100 g FW 和 1650 mg/100 g FW) 和“Glen Fine” cv。（1740 mg/100 g FW 和 1710 mg/100 g FW）水果含有显着更多的总有机酸和柠檬酸（1680 mg/100 g FW 和 1610 mg/100 g FW）以及（1680 mg/100 g FW 和1670 mg/100 g FW）与其他实验品种相比。然而，2014 年的“图拉明”简历。其特征在于最高水平的总糖 (14.9 g/100 g FW) 和蔗糖 (5.0 g/100 g FW) 含量。