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Register a new userEffect of Flower and Fruit Thining at Different time intervals and Gebberellic Acid Treatment on Alternate Bearing of Olive Trees
تأثير عملية الخف اليدوي للأزهار و الثمار في مواعيد زمنية محددة ثم المعاملة بالجبريلين (GA3) في عملية التمايز الزهري في شجرة الزيتون .L europaea. Olea
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Damascus University ورقة بحثية
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2004
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العربية
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تعد ظاهرة المعاومة (bearing Alternate) أهم مشكلة تعاني منها شجرة الزيتون. و قـد أجريـت الدراسة خلال عامي 2002 – 2003 في مركز البحوث العلمية الزراعية بحمص على صنفين (صـوراني – دعيبلي) بهدف دراسة تأثير عملية خف الأزهار و الثمار في مواعيـد زمنيـة محـددة ثـم المعاملـة بالجبريلين بتركيزين (500،150) PPM في عملية التمايز الزهري تبين ما يأتي: إن عملية خف الأزهار و المعاملة بالجبريلين في مرحلة الإزهار المليء لم تؤثر في النسبة المئويـة للبراعم الزهرية، في حين أدت عملية خف الثمار في مواعيد زمنية محددة ثم المعاملة بـالجبريلين بـدءاً من مرحلة العقد و حتى مرحلة تصلب النواة إلى انخفاض النسبة المئوية للبراعم الزهرية بشكل واضح في الصنف صوراني في عامي 2002 و 2003 في مرحلة العقد و بعد أسبوعين من العقد. أما في الصنف دعيبلي أدت إلى انخفاض النسبة المئوية للبراعم الزهرية في مرحلـة العقـد و بعـد أسبوعين و أربعة أسابيع من العقد، في حين لم يلاحظ أي تأثير في كلا الصنفين في مرحلة تصلب النواة.
Alternate bearing is one of the most important phenomena in the olive trees. A study was conducted during 2002 - 2003 at the Agricultural Research Center in Homs on two olive varieties (Sorani and Daebli) to assess the effect of flower and fruit thinning at different time intervals on flowering differentiatian, percentage of vegetative buds, length of branch, length of the internodes and total number of buds. The results showed that: - flower thinning and treatment with Gibberellic acid (GA3) during the maximum flowering did not influence the percentage of buds, while flower thinning during different periods folowed by treatment with Gibberellic acid during the fruit setting phase, endocarp sclerification had significantly decreased the percentage of flower buds for Sorani variety in 2002 and 2003 during the fruit setting phase and two weeks later. In Daebli variety this treatment decreased the percentage of flower buds during fruit setting, two weeks later, and after four weeks from fruit setting whereas, the treatment had not effect in both the varieties during endocap sclerification stage.
References used
Hartman H. Optiz, and R. H. Hollman, 1966. Pruning olives in California Cali Agri, Experimental Station. Bul, 492. 1962
Legave J. M, 1975. la differenciation des bourg eons à fleurs et le repos hivernal chez, l’abricotier (prunus armeniaca vulgaris) . pomologie francaise . Nouvelle serie; TXVII; Nْ g; 150 -166
Martin ,G. C. 1992. The time of floral induction in the olive. JAM –SOC – Hortic–Sci–Alexandria, va: The society Mar 1992. vol. 117(2)p. 304-307
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