الفهرس 
تحسيي جودة عنب الوائذة صنف فلين سيذلس بوعاهالث االثيفوى وحوض االبسيسك والبوتاسيوم والواغنسيومOnly 14 pages are availabe for public view
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Abstract
This study was carried out during the two consecutive seasons 2018 and 2019 on
ninety- six uniform in vigour own rooted 8 years old grapevines cv. Flame seedless grown in west Abu Qurqas district, Dakahlia Agriculture Development Minia Governorate- Egypt,
where the texture of the soil is loamy sand.
The selected vines were planted at 2.0 x 3.0 meters apart. The chosen vines (96) were trained by spur pruning system leaving 60 eyes / vine (16 fruiting spurs x 3 eyes on each spur plus 6 replacement spurs x two eyes each).
The vines were trained according to the double cordon system and supported with
Spanish Cubisn System.
Pruning was carried out during the last week of December in both seasons. Drip
irrigation system was followed using well water containing 600 ppm salinity.
This study was planned to examine the effect of Ethephon, ABA, potassium and
magnesium on vine nutritional status, berries maturation, yield as well as physical and chemical characteristics of the berries of grapevine cv Flame seedless grown under Middle Egypt conditions.
The selected vines (96 vines) received the same horticultural practices that were already applied in the vineyard except application of Ethephon, ABA, potassium and magnesium.
This experiment included the following twelve treatments from single and combined applications of Ethephon, ABA, potassium and magnesium sulphate.
1- Control vines ( sprayed with water).
2- Spraying potassium sulphate at 0.2 % (2 g /L).
Summary and Conclusion 53
3- Spraying magnesium sulphate at 0.2 % (2 g /L).
4- Spraying Ethephon at 300 ppm ( 0.625 ml/ L).
5- Spraying ABA 200 ppm ( 2.0 ml/l Protone).
6- Spraying potassium sulphate at 0.2 % + Ethephon at 300 ppm.
7- Spraying potassium sulphate at 0.2 % + Ethephon at 200 ppm.
8- Spraying magnesium sulphate at 0.2 % + Ethephon at 300 ppm.
9- Spraying magnesium sulphate at 0.2 % + ABA at 200 ppm.
10- Spraying Ethephon at 150 ppm ( 0.31 ml/ L) + ABA at 100 ppm ( 1.0 ml/l Protone).
11- Spraying potassium sulphate at 0.2 %+ magnesium sulphate at 0.2% + ABA at 200 ppm.
12- Spraying potassium sulphate at 0.2 %+ magnesium sulphate at 0.2% + Ethephon at 300 ppm.
Each treatment consisted of four replicates, two vines per each. Ethephon (48%),
Protone (10% ABA), potassium sulphate (48% K2O) and magnesium sulphate (9.6 % Mg).
Potassium sulphate and magnesium sulphate were sprayed four times during season (at growth start, just after berry setting, three weeks later and at veraison stage). Spraying
Ethephon and Protone two times during season at veraison stage and one week later.
Triton B as a wetting agent was added to all spraying solutions at 0.05%, spraying was done till runoff.