الفهرس 
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Abstract
Experiments were conducted during four consecutive seasons of 2017, 2018 and 2019 on three grape cultivars : “Bez-El-Anza” , “Thompson Seedless” and “Red Roomy” grown in the experimental orchard of fruit section, Faculty of Agriculture , Assiut University.
Treatments:
Spraying with Algae extract at 2 g/l., Spraying with amino acids (mix.) at 500 ppm, Spraying with Glycin at 500 ppm. , Spraying with Methionin at 500 ppm., Spraying with Lysin at 500 ppm., Spraying with Tyrosin at 500 ppm., Spraying with Folic acid at 150 ppm., Spraying with Vit. B6 at 150 ppm., Spraying with Vit. B12 at 150 ppm. and Control (water only).
The following measurements were taken on each vine:
A- Vegetative measurements:
Shoot length of the current season (cm.), leaf number/ shoot, leaf height & leaf width (cm.), to determine leaf area (cm2), weight of one-year old pruning wood (g/vine), total carbohydrates, total nitrogen in one-year old pruning wood (%), and C/N was then calculated.
B- Yield components:
Initial fruit set (IFS %), yield (kg/vine), Cluster no. / vine, cluster weight (g.)
C- Cluster and berry attributes:
1- Physical characteristics:
Cluster height, width (cm): To determine cluster shape index (H/W), Berries number / cluster, weight of 100 berries (g.), shot berries (%), Berry height and diameter (cm) and then berry shape index (H/D) was calculated and juice vol. of 100 berries.
2- Chemical properties:
Total soluble solids (TSS %), total acidity (T.A), TSS / acid ratio was then calculated, vitamin C (Ascorbic acid %), reducing sugars (%), juice pH: By digital pH meter, Chlorophylls (A, B), total Chlorophylls and total Carotenoids (mg/100g. F.W. of leaves)
Results:
A- Vegetative measurements:
During the three seasons of study, most of tested treatments significantly surpassed the control respecting all parameters.
Shoot length:
The most effective treatment in this respect was Folic acid which recorded the highest value during the 2nd season “Red Roomy” gave the highest values during the 2nd and 3rd seasons while “Thompson Seedless” during the 1st season.
Leaf number/ shoot:
The most effective treatment in this respect was Vit.B12 which recorded the highest value during the 1st season. “Red Roomy” recorded the highest values during the 1st and 3rd season while “Thompson Seedless” during the 1st season.
Leaf area (cm2):
The most effective treatment in this respect was amino acid mixture which recorded the highest value during the 3rd season. “Thompson Seedless” surpassed the other two cultivars during the three seasons.
Chlorophyll A:
The most effective treatment in this respect was Folic acid which recorded the highest value during the 3rd season. “Thompson Seedless” surpassed the other two cultivars during the three seasons.
Chlorophyll B:
The most effective treatment in this respect was Algae extract which recorded the highest value during the 3rd season. “Red Roomy” gave the highest values during the three seasons while “Bez-El-Anza” during the 3rd season.
Total Chlorophylls:
The most effective treatment in this respect was Folic acid which gave the highest value during the 3rd season. “Red Roomy” gave the highest values during the 1st and 3rd seasons while “Thompson Seedless” and “Bez-El-Anza” cultivars recorded the highest values during the 3rd season.
Total Carotenoids:
The most effective treatments was Algae extract which recorded the highest value during the 3rd season. “Thompson Seedless” exhibited the highest values during the 1st and 3rd seasons while “Bez-El-Anza” during the 2nd and 3rd seasons.
Pruning wood weight (g/vine):
The most effective treatment in this respect was Lysin which exhibited the highest value during the 3rd season. “Red Roomy” cultivar surpassed the other two cultivars during the three seasons.
Total carbohydrates:
The most effective treatment in this respect was Algae extract which gave the highest value during the 3rd season. “Thompson Seedless” gave the highest value during the 1st and 3rd season while “Red Roomy” and “Bez-El-Anza” cultivars gave the highest values during the 1st season.
Total nitrogen in one-year old pruning wood (%):
The most effective treatment in this respect was Glycin which recorded the highest value during the 3rd season. “Red Roomy” gave the highest value during the 2nd and 3rd seasons while “Bez-El-Anza” gave the highest value during the 1st and 3rd seasons and “Thompson Seedless” recorded the highest values during the 3rd season.
C/N:
The most effective treatment in this respect was Vit.B12 which recorded the highest value during the 1st season. “Thompson Seedless” gave the highest value during the 1st and 3rd season while Red Roomy” gave the highest value during the 1st season.
B- Yield components:
Initial fruit set (IFS %):
The most effective treatment in this respect was Algae extract which recorded the highest value during the 1st season. “Bez-El-Anza” surpassed the other two cultivars during the three seasons.
Yield (kg/vine):
The most effective treatment in this respect was Tyrosin which recorded the highest value during the 1st season. “Red Roomy” surpassed the other two cultivars during the three seasons.
Cluster no. / vine:
The most effective treatment in this respect was Tyrosin which recorded the highest value during the 1st season. “Red Roomy” surpassed the other two cultivars during the three seasons.
Cluster weight (g.):
The most effective treatment in this respect was Vit.B12 which recorded the highest value during the 1st season. “Red Roomy” surpassed the other two cultivars during the three seasons.
C- Cluster and berry attributes:
1- Physical characteristics:
Cluster shape index (H/W):
The most effective treatment in this respect was amino acid mixture which recorded the highest value during the 1st season. “Red Roomy” surpassed the other two cultivars during the three seasons.
Berries number / cluster:
The most effective treatment in this respect was amino acid mixture which recorded the highest value during the 1st season. “Thompson Seedless” surpassed the other two cultivars during the three seasons.
Weight of 100 berries (g.):
The most effective treatment in this respect was Folic acid which recorded the highest value during the 2nd season. “Red Roomy” surpassed the other two cultivars during the three seasons.
Shot berries (%):
The most effective treatment in this respect was Lysin which recorded the least value during the 1st season. “Thompson Seedless” gave the least values compared to the other two cultivars.
Berry shape index (H/D):
The most effective treatment in this respect was Lysin which recorded the highest value during the 2nd season. “Bez-El-Anza” surpassed the other two cultivars during the three seasons.
Juice vol. of 100 berries:
The most effective treatment in this respect was Folic acid which recorded the highest value during the 3rd season. “Red Roomy” surpassed the other two cultivars during the three seasons.
2- Chemical properties:
1– Total soluble solids (TSS %):
The most effective treatment in this respect was Algae extract which recorded the highest value during the 1st season. “Thompson Seedless” surpassed the other two cultivars during the three seasons.
2- Total acidity (T.A):
The most effective treatment in this respect was Lysin which gave the least value during the 1st season. “Red Roomy” gave the least values during the three seasons while “Bez-El-Anza” gave the least value during the 1st season.
3- TSS / acid:
The most effective treatment in this respect was Lysin which recorded the highest value during the 1st season. “Red Roomy” gave the highest value during the 1st season while “Thompson Seedless” gave the highest values during the 2nd and 3rd seasons.
Reducing sugars (%):
The most effective treatment in this respect was Vit.B6 which recorded the highest value during the 3rd season. “Thompson Seedless” surpassed the other two cultivars during the three seasons.
Vitamin C (Ascorbic acid %):
The most effective treatment in this respect was Glycin which recorded the highest value during the 1st season. “Thompson Seedless” gave the highest values during the 2nd and 3rd seasons while “Bez-El-Anza” gave the highest value during the 3rd season.
Juice pH:
The most effective treatment in this respect was Lysin which exhibited the highest value during the 2nd season. “Red Roomy” gave the highest values during the 1st and 2nd seasons, while “Bez-El-Anza” gave the highest value during the 2nd season and “Thompson Seedless” recorded the highest value during the 1st season.
Conclusion:
The present study concluded that:
Attention to the local grape cultivars due to their abundant production and good qualities.
Study the problem of bud fertility in ”Bez-El-Anza” cultivar in Upper Egypt.
Tendency to spraying algae extract (2 g/l), amino acids (500 ppm) and vitamins (150 ppm) to improve the productivity of grapevines and enhance their resistance to environmental stress.