Özet:

Objective: This study was carried out to determine change of quality properties as respiration rate, weight loss, fruit flesh firmness, soluble solids content (SSC), titratable acidity and vitamin C of ‘Hayward' kiwifruit cultivar (Actinidia deliciosa) grown in different districts (Merkez, Bulancak, Espiye, Eynesil, Güce, Keşap, Tirebolu and Yağlıdere) of Giresun during cold storage Materials and Methods: The fruit were stored at 0±0.5 °C and 90±5% relative humidity conditions for 5 months. Measurements and analyzes were made monthly. Results: In all measurement periods of the cold storage, the fruit grown in Espiye Merkez, Keşap (except the 150th day), Tirebolu and Yağlıdere were found weight loss at a similar level, but significantly lower than the fruit grown in Bulancak, Eynesil and Güce districts. Respiration rates of all fruit were found to be similar at 120th and 150th days of cold storage. During cold storage, the firmness of the fruits grown in the Merkez district was significantly higher than in other cultivation areas. At the end of the cold storage, a significantly higher SSC was measured from the fruit grown in Bulancak district compared to the other fruit. However, a significantly higher pH was determined from the fruit grown in Bulancak, Kesap and Yağlıdere compared to other fruits. The highest titratable acidity was obtained in the fruit grown in the Merkez. In terms of vitamin C content, it has been observed that the fruit grown in Bulancak and Tirebolu districts are at a significantly higher compared to other districts. Conclusion: As a result, when the quality characteristics of the 'Hayward' kiwifruits harvested from different districts were examined during storage, it was determined that different ecological characteristics were effective in the quality change during cold storage.

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