الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 125 |  |  |
| | | from | 125 | | |
Abstract
This study was conducted during 2014 and 2015 seasons on 39 Tofahi olive cvs. The trees of such cv. were about 6- years old, propagated by stem cuttings and growing in a private orchard located at Dar El-Salam district, Souhag Governorate. The uniform in vigour trees of the Tofahi olive were planted at 4x4 meter apart in sandy soil under drip irrigation system with the same amount of water and subjected to the regular recommended horticultural practices and free from pathogens and physiological disorders. Salinity of irrigation water was1500 ppm.
This study was carried out for studying the effect of spraying some vitamins and silicon on growth, yield and fruit quality of Tofahi olive trees grown under Souhag environmental conditions
This experiment included the following thirteen treatments from single and combined applications of different vitamins and silicon:
b1) Control ( water sprayed trees).
b2) Spraying vitamin B12 (cyanocobalamin) at 250 ppm.
b3) Spraying potassium silicate at 0.1%
b4) Spraying vitamin B6 (pyrodoxine) at 250 ppm
b5) Spraying vitamin K (phelo kenone) at 250 ppm
b6) Spraying vitamin B12 at 250ppm + potassium silicate at 0.1%.
b7) Spraying vitamin B12 at 250ppm + vitamin B6 each at 250 ppm
b8) Spraying vitamin B12 + vitamin K each at 250 ppm.
b9) Spraying potassium silicate at 0.1% + vitamin B6 at 250ppm.
b10) Spraying potassium silicate at 0.1% + vitamin K at 250 ppm.
b11) Spraying vitamin B6 + vitamin K at 250 ppm.
b12) Spraying vitamin B6 + vitamin B12 + vitamin K each at 250 ppm.
b13) All vitamins (B6 + B12 + K each at 250 ppm) + potassium silicate at 0.1%.
Each treatment was replicated three times, one tree per each (39 trees). Spraying of vitamins and potassium silicate (25% Si + 10% K2O) was carried out three times at growth start (1st week of Mar.) , just after fruit setting (mid. of Apr.) and at one month later (mid./ of May) . Triton B as a wetting agent was added to all silicon and vitamin solutions at 0.05% and spraying was done till runoff ( 10 L / tree).
This study was statistically analyzed using randomized complete block design ( RCBD). Each treatment was replicated three times one tree per each.
During both seasons, the following measurements were recorded:
1- Some vegetative growth characteristics namely main shoot length(cm), shoot thickness (cm), number of leaves/shoot and leaf area (cm2)
2- Leaf pigments namely chlorophylls a, b, total chlorophylls and total carotenoids (as mg/ 100 g F.W.), leaf total carbohydrates % as well as percentages of N, P, K, Mg and Ca in the leaves and leaf content of Zn, Fe, Mn and Cu (as ppm).
3- Flowering and fruit setting aspects namely number of panicles/shoot and number of flowers/panicle as well as percentages of initial fruit setting and fruit retention.
4- Yield /tree (kg.), number of fruits/tree and oil yield/fed (kg.).
5- Fruit quality characteristics namely weight, height and diameter of fruit, flesh %, flesh/stona, oil % and acidity%.