Ziad Khouri (1)*, Mohammad Nizam(1), Ihab Ahmad(1), Ghaith Nassor(1) and Ammar Askarieh (1)
(1). Latakia Research Center, General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.
(*Corresponding author: Dr: Ziad Khouri, E-Mail: khouriz@yahoo.com).
Received: 16/08/2023 Accepted: 1/10/2023
Abstract:
The research was carried out in Kafron district in Tartous countryside during the year 2021-2022 with the aim of studying the effect foliar application by ammonium thiosulfate (ATS) with different concentrations (1.5, 2 and 3%), respectively of peach blossom thinning (July elberta cv.) of improving vegetative and fruitful growth and productivity compared control trees. The results showed that improving characteristics vegetative growth due to treatments especially foliar application treatments by (ATS) compound with concentration 3% and increasing leaf area, length and diameter shoot length and nitrogen percent in leaf gave 44.11 (cm2), 62.55 (cm), 0.71 (mm) and 2.62 (%), respectively, also this treatment reduced fruit set compared other treatment and control trees and gave value 57.12% and increased productivity 69.40 (kg/tree). Also improved fruit weight and fruit size. This treatment recorded positive values for chemical proprieties of fruits compared control trees such SSC, total sugar and anthocyanin content and recorded 11.22%, 8.99 (100 mcg/ml of glucose) and 19.88 (mg/100g fresh weight).
Key words: Thinning, Productivity, Foliar application, Ammonium thiosulfate, Peach, July elberta
Full paper in Arabic: pdf