The impact of harvest time on the quality of Indian jujube 'Nomsod' produced in northeastern Thailand
Indian jujube (Zizyphus mauritiana Lamk.) is an economic fruit crop and Nomsod is a promising new jujube cultivar for production in northeastern Thailand. The fruit is high in vitamin C content and has a sweet yet slightly acidic taste. However, there is no scientific information in relation to its quality, especially regarding harvest maturity under production conditions in Thailand. This study investigated the effect of harvest time on the quality of Indian jujube Nomsod; specifically, at 90, 105, 120, and 135 days after full bloom (DAFB). Fruit growth at 120 DAFB had the highest values for fruit weight and diameter, fruit width, fruit length, and pulp thickness. L* and b* values increased during development. The total soluble solids (TSS) concentration increased to a maximum of 10.40 °Brix at 120 DAFB. Titratable acidity content (TA) and firmness both increased gradually to 0.26% and 62.65 N, respectively, also at 120 DAFB. The ratio of TSS/TA at this stage was 40.60. In contrast, the amount of ascorbic acid gradually decreased until 120 DAFB. It was concluded, therefore, that to achieve a high TSS it is best to harvest Nomsod Indian jujube at 120 DAFB.
Niyanut, S., Nampila, R., Techawongstien, S., Isarangkool Na Ayutthaya, S. and Meetha, S. (2021). The impact of harvest time on the quality of Indian jujube 'Nomsod' produced in northeastern Thailand. Acta Hortic. 1312, 493-498
jujube, Ziziphus mauritiana Lamk., harvest maturity, quality