椪柑適當採收條件之探討

Studies on the Optimum Harvesting Conditions of Ponkan Mandarin

本研究以台南縣東山鄉、嘉義縣竹崎鄉與台中縣新社鄉等共九個果園 所採收之椪柑為試驗材料，進行物理化學及官能品評分析，藉由統計分析探討不同產地所生產之椪柑的適當採收條件，以提供椪柑在“品質掛帥”的現今市場上，品質標準建立之參考。結果顯示：1.椪柑果皮之L, a, b, a/b值、與果汁之可溶性固形物、酸度、糖酸比與整個果品受消費者的喜好程度呈顯著相關。2.以東山鄉、竹崎鄉與新社鄉所生產的椪柑受消費者的喜好程度已達“有點喜歡＂之程度為其採收之適當期，其柱端部及蒂端部之a/b值至少須分別達到0.04，0.10及0.21；可溶性固形物至少須分別達到9.2，9.2及9.8；而糖酸比至少須分別達到17.0，16.3及17.8。

Using Ponkan mandarin produced at Dungshan in Tainan county, Chuchi in Chayi county and Hsingsheh in Taichung county as the experimental materials, their physicochemical and sensory attributes were analyzed to investigate the quality changes during harvesting periods. Their optimum harvesting conditions are expected to be a reference for establishing quality standards of Ponkan mandarin to compete the imported produces in the local market. The results are summarized as follows: 1. The L, a, b, a/b values on the epicarp of Ponkan mandarin and the °Brix, acidity, °Brix/ acidity values of juice had significantly correlations (p<0.05) with the degree of liking for the fruits by the consumer test. 2. Using the degree of liking reaching to the 'like slightly' level as the minimum standard for harvesting, the a/b values on the epicarp of Ponkan mandarin had to at least reach to 0.04, 0.10 and 0.21; the °Brix values had to at least reach to 9.2, 9.2 and 9.8; the °Brix/acidity values had to at least reach to 17.0, 16.3 and 17.8 for Ponkan mandarin produced at Dungshan, Chuchi and Hsingsheh, respectively.