The Effect of Coverage and additional fertilization on the productivity and quality of the second batch of fruits of the local grape variety, Sabiei.

Abstract

This research was conducted between 2020 and 2023 at the Agricultural Scientific Research Center in Lattakia - General Commission for Scientific Agricultural Research. The research aimed to obtain table grapes for fresh consumption during fall and winter, without using expensive processes of storage and refrigeration that negatively affect the quantity, quality and health value of stored fruits, and to study the effect of additional fertilization and plastic coverage in improving the productivity and quality of the second batch of fruits of the local grape variety, Sabiei, by conducting a factorial  experiment with two factors: plastic coverage and additional fertilization with a high-potassium soluble fertilizer (10:10:40). The results showed that plastic coverage led to the ripening of the fruits during December and January by increasing the percentage of soluble solids (23.68 %), and reducing the total acidity (0.3833 %) in the fruits of the second batch. The fertilization treatment also led to an increase in the average productivity of a single tree (9.461 kg), and the average cluster weight (169.9 g).