Effects of Fruit Harvesting Periods, Tree Ages and Fruit Development Periods on Fruit Quality of Neck Orange

Abstract

Effects of fruit harvesting periods and fruit development periods on fruit quality of neck orange. The experimental was used 2x5 factorial in completely randomized design (CRD) with single tree plots and replicated five times. The treatments included 2 factors ; A : the different time of harvesting (the beginning of the year, and the end of the year) B: the different age of pomelo fruit (5^th 6^th 7^th 8^th and 9^th months), the experiment was conducted at the orchard of Mr. Donkonee Lowmhan in the Banna sub-district, Chana district, Songkhla province, Thailand, This experiment was starting from January, 2018 to  September, 2019.        The result was shown that the effect of the harvesting time of half year and half year later, which was advanced significant difference of the harvesting time. The half year could develop as indicated fruit weight (g), peel weight (g), orange fresh (g), diameter of fruit (cm) and fruit circumference (cm) is higher than a half year later. The fruit quality of the half year had higher total soluble solid (TSS), titratable acidity (TA) and TSS/TA ratio than a half year later. The fruit age at 5^th 6^th 7^th  8^th and 9^th months was develop of fruit weight(g), peel weight (g), fresh weight (g), diameter of fruit (cm) and fruit circumference (cm), the result showed that fruit age at 7^th- 8^th months could develop the highest of fruit weight(g), peel weight (g), fresh weight (g), diameter of fruit (cm) and fruit circumference (cm) and highest of fruit quality as indicated of TSS, TA and TSS/TA ratio.

Keywords: tree age, fruit age, fruit development, fruit quality, Neck orange