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Register a new userPossibility of reducing frost injury on apple (Malus domestica cv. Golden Delicious) using Vitamin E (α-Tocopherol) and Glycerine
إمكانية خفض أضرار الصقيع على صنف التفاح غولدن ديليشس Golden Delicious باستخدام فيتامين α) E - توكوفيرول) و الغليسيرين
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حسان عبيد( باحث )
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هدف هذا البحث إلى دراسة تأثير معاملة طرود من أشجار تفاح الصنف غولدن ديليشس خلال مرحلة الإزهار في إمكانية خفض أضرار الصقيع بعد معاملتها بالتوكوفيرول 0.25 %، و بمزيج من التوكوفيرول %0.25 و الغليسيرين 5%، و ذلك قبل 24 و 48 ساعة من تطبيق الصقيع الصناعي على الطرود. و كذلك دراسة الموعد الأفضل للمعاملة قبل التعرض للصقيع للوصول إلى أفضل حماية للأزهار.
This study was conducted on flowering apple shoot of Golden Delicious, in order to study the effect of application of some chemical substances, α- Tocopherol (0.25%) and a mixture of α-Tocopherol (0.25%) and Glycerine 5%, at 24, and 48 hr before freezing incidence, and on best time of application on apple trees to reduce the effect of freezing.
References used
Antikainen, M. and Griffith. M. 1997. Antifreeze protein accumulation in freeze-tolerance cereals. Physiologia Plantarum 99, 423-432
Ashworth, E. N. and Kieft, T. L. 1995. Ice nucleation activity associated with plants and fungi. In: Lee, R. E., Jt., Warren, G.J. and L.V. Gusta (eds.). Biological ice nucleation and its applications. APS Press, St. Paul, Minn, 137-162
Chopra, V. L. 1993. Biotechnological tools for conserving biodiversity. Indian Farming 43, 7-16
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In this research, we have studied the effects of some summer pruning at the
mid June and Juli, in addition to the common periodical winter pruning during
February.
Both studies were done to evaluate calcium concentration of fruits, quality
and yi
eld the apearance of physiological disorders during the storage and
fruits. Experiments were conducted on 8 year apple trees of Starking Delicious
and Golden Delicious, which are sensiitve to laek of calcium and as a result
caused bitter-pit as an important physiological disorder on apple fruits.
Summer pruning of apple trees at mid june increases their content of
calcium and their colors, also decreases physiological disorder, weight loss
during storage, without affecting the annual yield of trees.
Accorrding to the attained results, we recommend the farmers of apple trees
to follow summer pruning, because of its benefits on improving the condition of
trees and achieving the balance between vegetative and generative growth, and
reduced the alternate Summer pruning. Also improve the quality of fruits, their
storability and their resistance for some physiological disorders during storage.
The study was conducted at the Horticulture Department, Faculty of
Agriculture, University of Damascus, during the season of 2002 and 2003, in
order to study the effect of dipping apple fruits for the tow apple sorts for 5
minutes with some chemic
al substances, α-Tocopherol (0.25%) and
Prohexadion-Calcium (1%).
The fruits were stored at AlMaze cold storage unit under the normal
storage condition (0-1ºC, 93% R.H.), to find out some effects of these
treatments on some physical, chemical, and physiological changes of treated
and untreated apple fruits, especially: fruit weight, firmness, starch, and
soluble solids content.
Analysis of variance indicated a significant difference in storage ability of
both fruit apple samples in case of dipped fruits in Procalcium solution 1%
compared with control fruits. The tocopherol treated fruits were sometimes
significant.
The results showed a reduction in fruit weight in case of treated sample
during cold storage time. Fruit firmness was significantly better in both
treatments of procalcium 1% and tocopherol 0.25%compared with control,
and reducing physiological disorders during cold storage period.
The study was performed in Barshin Research Station- General
Commission for Scientific Agriculture Research on the trees age of
13 in grafted with Golden Delicious Cultivar on three rootstocks
(seedless rootstock Malus domestica, vegetative strong
rootstock
MM109, and MM111 half strong rootstock) over the years
(2014.2015 ).The study focused on growth vigor (the stem
circumference above the grafted area ,crown size - the rate of
shoots length and productivity).
The study was performed over the years (2014٬2015) in Barshin
Research Station- General Commission for Scientific Agriculture
Research on the trees age of 15 in grafted with Golden Delicious
Cultivar on two rootstocks, strong: seeds ( Malus domest
ica) and half
strong (vegetative Malling-Merton "MM111"). The study focused on the
effect of the original on the concentration of each of the elements (N-P)
in the leaves and branches of the Golden delicious Cultivar grafted on
those rootstocks.
This study was carried out in AL Swaida nursery during 2009 and 2010
seasons to study effect of time and grafting high are on the growth strength of
apple cultivars: Golden delicious، Stark rimson, Starking delicious. Results
showed that Golden de
licious preponderated on the other cultivars in diameter
average (9.06 mm) at 3cm above the grafting area (5cm above soil level). The
study also confirmed that Starking delicious showed significant superiority(p
<0.05) in term of growth strength on the other two cultivars when grafting was
carried at 5cm and 20cm above soil level and the best of leaf area (2862،89cm2)
was observed at 20 cm above the soil level when grafting took place in 31 of
August.
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