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IMPROVING FRUIT SET, YIELD AND FRUIT QUALITY OF KHADRAWI DATE PALM CULTIVAR
2018
A. Moustafa | N. Abdel-Hamid | A. Abd El-Hamid | M. El-Sonbaty | S. Abd El-Naby
This experiment was carried out during 2015 and 2016 experimental seasons to investigate the effect of spraying with moringa extract at 3%, garlic extract at 3% or ascorbic acid at 300 ppm on fruit set, yield and fruit quality of Khadrawi date palm cultivar. Anyhow, bunches were sprayed at three times (3 hours before pollination then 4 and 8 weeks after pollination). The present results indicated that spraying date palm bunches with moringa extract or garlic extract recorded the highest initial fruit set in the first and second seasons, respectively. As well as, moringa extract gave the highest fruit retention and yield in both seasons. In addition, all treatments improved some fruit physical characteristics i.e. fruit weight, flesh weight, fruit volume and fruit length compared to the control treatment in the two studied seasons. Also, results showed that moringa extract or ascorbic acid increased TSS%, total sugars % and reducing sugars % in both seasons compared to the control. Meanwhile, the lowest fibers % was obtained by garlic extract in the two seasons. Also, all treatments had no significant effect on total acidity % and tannins content in both seasons.
Показать больше [+] Меньше [-]IMPACT OF IRRIGATION WATER MANAGEMENT AND SILICON SPRAYING ON AVOIDING COLD INJURY AND IMPROVEMENT YIELD OF KITT MANGOS
2018
A. Gooda | N. Abd El-Hamid | A. Abo-Hadid | O. El-Behari
The present study was carried out during 2015 and 2016 seasons on Kitt mongo trees to evaluate the effect of three irrigation water management (4000 m3 of irrigation water were applied to the four physiological stages of mango tree growth as 15 & 20 & 40 & 25 % , 30 & 15 & 35& 20 % and 35 & 20 & 30& 15 % m3 / tree/ year, respectively) as well as four concentrations of potassium silicate on avoiding cold injury and improvement yield of kitt mango . Irrigation Mango tree by the second program water management (30, 15, 35 , 20) recorded The highest values of vegetative growth in terms of number of shoot /tree and lower values of leaves percentage affected with cold injury, Also, an evident increase in the content leaves of N & K elements , C/N ratio and final fruit set % total yield by divided irrigation water at the four physiological stages of mango trees (30, 15, 35, 20) was recorded compared with the other two water managements. No significant differences between the second and third irrigation water management programs (30%, 15%, 35%, 20% and 35%, 20%, 30%, 15%) on values of leaf area, P% and total carbohydrates as well as on TSS, acidity and L-ascorbic acid content of fruits . Spraying trees with potassium silicate in three times during the period from October to January at the rate of 1000 ppm give the highest values of quality characteristics at mango trees and their fruits. While sprayed with potassium silicate at 2000 ppm achieve moderate values of the mentioned characteristics It could be recommended from the obtained data that irrigation water management at the four physiological stages (30, 15, 35, 20) of Kitt mango trees and spraying 1000 ppm potassium silicate in dormancy period is considered a good treatment to avoid cold damage on leaves and fruits as well as in giving the highest yield and quality of kitt fruit.
Показать больше [+] Меньше [-]EFFECT OF SPRAYING WASHINGTON NAVEL ORANGE TREES WITH SELENIUM ON VEGETATIVE GROWTH, PRODUCTIVITY AND FRUIT QUALITY
2018
B. Bakr | A. El-Gazzar | Noha Mansour | M. Fawzy
ve seasons, 2012 and 2013 in a private orchard in Barshom vallage located at El-Kalubia Governorate Egypt. Washington Navel Orange trees (Citrus Sinensis) budded on sour orange rootstock (Citrus aurantium, L.) were 7- years- old and planted at 5 x 5 meters under basin irrigation system. This investigation aimed to study the effect of selenium (Se) levels (0, 20, 40, 80 and 160 ppm) as foliar spray on growth, yield, fruit quality, leaf mineral content and enzymes activity of Washington Navel orange trees. The obtained data showed that, selenium had a significant promotive effect on growth, yield, fruit quality, leaf mineral content and enzymes activity of Washington Navel orange trees. Results indicated that treatment of Se at 40 ppm gave the highest significant results, whereas, treatment 160 ppm gave the highest fruit selenium content.
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