تأثير الجمع و التسويق المبكر على بعض الصفات الفيزيائية و الكيميائية لثمار برتقال أبو سرة

الملخص EN

This study was conducted to evaluate the impact of the collection date, as some farmers tend to collect the fruits in the stage before full maturity.

The experiment was conducted on a private farm, south of the city of Zawiya, Libya.

3 Washington navel orange trees were selected, and samples were taken on a weekly basis, starting from November 15, 2022, for a period of five weeks.

Then estimating the fruit hardness, peel thickness, juice volume, total soluble solids (TSS) and pH.

The obtained results showed that there were significant differences for the fruit hardness between the first collection date and the rest of the dates; The sample of the first week had the highest recorded value of 1465 g/cm², while the values gradually decreased to record 1155 g/cm² in the fifth week, while the collection dates did not have any significant effect on the thickness of the crust, which ranged between 0.5-0.6 cm.

for juice volume and dissolved solids; The results showed that there was a significant difference between the collection dates from the third to the fifth week and the collection dates in the first and second weeks, so that the fifth and fourth weeks recorded the highest values of 50 ml and 11.8 Brix, respectively, while in the first and second weeks they were 37-38 ml and 10.9 Brix, respectively.

While there were no significant differences between collection dates in the pH values to score 3.5-3.6