摘要：Some physical, mechanical and ripening properties of Okuzgozu (Vitis vinifera L. vc.) grape berries were determined. The test samples were obtained from an organic commercial vineyard in Di-yarbakir province, which is located in the southeastern part of Turkey. The tests were carried out during the different phenological stages of the veraison (30 August), 15 days after veraison (15 September) and harvesting time (30 September) in 2016. Some basic important berry ripening and harvesting parameters such as the maximum berry detachment force (FDF) from cluster and berry skin firmness were measured in Newton (N) by using a pull digital force gauge. Total soluble solids content (TSSC), pH and total acidity values were determined at three different phenological stages. The results show that the size of grape berries increased with period of maturity. The average length, width and thickness were obtained as 19.42 mm, 17.57 mm, and 17.53 mm, respectively. While weight of berries, TSSC, pH and, maturity index increased, BDF, BDF/W ratio, skin firmness, and acidity decreased with phenological stages and axial dimensions. The berries detachment force was decreased from 3.56 N to 2.69 N, while berries weight increased from 3.45 g to 4.42 g depend on phenological stages. Also, there were found closely relationships between mechanical and ripening properties of berries depend on phenological stages. While DF, FDF/W and skin firmness decreased, soluble solids content (17.50-23.97 %) and pH (3.533.76) values increased with phenological stages, whereas the total acids were slight changed and reduced from 0.462 to 0.273 %.
关键词：Grape;Okuzgozu;Berry;Maturity;Physical and Ripening Properties
