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Register a new userThe effect of some treatments on pear fruit storability (Pyrus communis L. Coscia cv.)
تأثير بعض المعاملات في القدرة التخزينية لثمار الإجاص كوشيا صنف (Pyrus communis L.)
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Damascus University ورقة بحثية
Publication date
2014
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Groves
and research's language is
العربية
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نفذ البحث لدراسة تأثير الرش بكلوريد الكالسيوم 5.0 % و 1 ،% و الرش بعـالي البوتاسـيوم 1غ/ل، و التغطيس بكلوريد الكالسيوم 2 ،% بالإضافة إلى التغليف بالبولي إيثلين فـي القـدرة التخزينيـة لثمـار الأجاص صنف كوشيا. دلت النتائج على تفوق معاملة الرش بعالي البوتاسيوم معنوياً على باقي المعاملات من حيث نسبة السكريات الكلية و الأحادية بعد القطاف مباشرة، فيما لم يكن هناك فـروق معنويـة بـين المعاملات بخصوص باقي المؤشرات. كما أظهرت النتائج بعد أربعة أشهر من التخزين تفوق المعـاملات المغلفة معنوياً في الحد من الفقد الوزني، و الحفاظ على صلابة الثمار و نسبة المواد الصلبة الذائبة مقارنة مع الثمار غير المغلفة، فقد بلغ متوسط الفقد الوزني في ثمار المعاملات غير المغلفة 15 ،% في حين كان 65.0 % في ثمار المعاملات المغلفة. و ترتب على هذا إيقاف تخزين ثمار المعاملات غير المغلفة، في حين استمر تخزين المعاملات المغلفة حتى سبعة أشهر. كما تبين و بعد سبعة أشهر من التخزين إلى أن أعلـى معدل فقد وزني كان في معاملة التغطيس بكلوريد الكالسيوم، و أقلـه كـان فـي معاملـة الـرش بعـالي البوتاسيوم. أما بخصوص الصلابة و نسبة المواد الصلبة الذائبة و الحموضة الكلية القابلة للمعايرة فلم يكن هناك فرق معنوي بين المعاملات كافة، في حين كان هناك فرق معنـوي بـين المعـاملات فيمـا يتعلـق بالسكريات الكلية و السكريات الأحادية بعد سبعة أشهر. كما أكدت الاختبارات الحسية الدور الفعال للتغليف مع معاملات الكالسيوم في زيادة القدرة التخزينية مع المحافظة على جودة الثمار، فقـد حـصلت معاملـة الرش بكلوريد الكالسيوم 1 % مع التغليف على أعلى القيم لمعظم الاختبارات الحسية.
This investigation was done to study the effect of spray for two times with CaCl2 0.5% and 1%, high potassium fertilizer and dipping with 2% CaCl2, in addition to packaging with polyethylene films on the storability of pear fruits "Coscia C.V". The results showed the significant superiority of high potassium fertilizer treatment on the other treatments concerning total and single sugars after harvesting time, while there weren't significant differences between the other treatments concerning the remaining indicators. After four months of storage, the packaging treatments were able to the significantly reduction of weight loss, in addition to preserving the firmness and total soluble solids in the comparison with unpackaged ones, the average of weight loss in unpackaged treatments was 15% and 0.65% in packaging treatments, which led to stop the storage of unpackaged treatments and continue packaging treatments until 7 months. After 7 months, the results showed that the dipping with 2% CaCl2 revealed the high weight loss, while was the least with high potassium fertilizer treatment, on the other hand there were no significant differences between treatments for firmness, total soluble solids and tetra table acidity, while total and single sugars showed significant differences between treatments. Moreover, the sensory tests assured the importance of packaging with CaCl2 treatments to improve storability and quality of pear fruits, which CaCl2 1% packaging treatment got the highest values for most of sensory tests.
References used
Balmush, I. L. and E. G. Salkova. 1988. The effect of growing conditions on the activity and on molecular forms of malic enzyme in apple fruits during postharvest ripening. Izv. Akad. Nauk Moldavskoi SSR. Biologicheskich ikimicheskich Nauk: 24-27
Ben Mimoun, M. and M. Marchand. 2013. Effects of Potassium foliar fertilization on different fruit tree crops over five years of experiments. Acta Hort. 984: 211-217
Bhat, M. Y., F. A. Hafiza Ahsan , M. A. Banday, A. Dar, I. Wani, and G. I. Hassan. 2012. Effect of harvest dates, pre harvest calcium sprays and storage period on physic chemical characteristics of pear cv. Bartlett. E3 Journal of Agricultural Research and Development, 2(4): 101-106
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The effect of different harvesting dates on the quality and storage ability
was studied for fruit of Coscia pear cultivar, which planted in the area of Daher
Aljabal- Sweida during two successive seasons 2007-2008. Fruit were harvested
in three di
fferent dates by week time intervals and stored for seven months at
(0-1 Cº and 90-95 % RH) in the storage units of apples and vine research
department. The effect of harvesting dates of fruit on the physical and chemical
properties was determined during period of 7 months in cold storage, by month
time intervals. The second date of harvest affected by decreasing weight loss
percentage, decay percentage, titratable acidity T. A, starch content and
firmness, in addition to that total soluble Solids T. S. S, number of acidity PH,
storage ability and shelf life were increased compared to the harvested fruit in
the different dates.
هدف هذا البحث إل دراسة تاثير بعض معاملات ما بعد القطاف في القدرة التخزينية وجودة ثمار البرتقال صنف فالنسيا في ظروف التخزين المبرد.
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.
This research aims study the effect of different treatments in activate and increase
percentage of germination Cupressus arizonicaL.seeds to use plants in forestation projects,
seeds were get from mature conifers, and tested by different treatments
with control, then
cultured within polyethylene bags many times to calculate indicators of germination. The
results showed that the soaking the seeds Cupressus arizonicaL. in citric acid 0.1% with
cold wet stratification for 30 days at 4-5c gave higher germination percentage 75%.The
treatments of the soaking seeds in sulfuric acid0.1% and hydroxide sodium 0.1% with cold
wet stratification for 30 days gave respectively 60%-53% .But superiority was not
significant. Other treatments; soaking the seeds in tap water 24h with cold wet
stratification for 30 days gave only 36%.But the control treatment gave lower germination
percentage of all just only 9%.
The treatment of soaking seeds in citric acid 0.1% with cold wet stratification for 30
days surpassed the rest of the treatments in effect on plant height at the end of the
experiment.
The aim of this investigation is studying effect of heat treatment and polyethylene packaging method in storability and quality of lemon fruits' Monachello and Enterdonato'. The experience was carried out in cold store of agriculture college in /Dama
scus university/, lemon fruits were stored at 10°c and 85% humidity for 180 days. laboratory experiences was carried out in laboratory of department of horticultural science in the same college during 2010-2011&2011-2012. Part of fruits were packaged in polyethylene bags with 30 microns, the other part of fruits dipped with hot water (62°c for 3 seconds)+ fungicide then were packed in polyethylene packs in addition to the control which untreated and unpacked.
The obtained results indicated the significant effect of dipping and packaging in perforated and unperforated bags treatments in maintain fruits quality of 'Monachello and Enterdonato' until the end of storage. maintaining of (32.89 and 39.06%( juice rate of Monachello respectively, and(11.05 and10.01%) of Enterdonato respectively. (35.27 and 36.57 mg/100ml (vitamin C of Monachello and (18 and11.07mg/100 ml( of Enterdonato, respectively.
On the other hand, the present investigation showed the positive effect of packaging treatment with 30 microns packs by reducing the weight loss for two sorts which was (51.94 and 68.83%) in dipping and packaging in perforated bags treatment respectively, and the important role to stop fruit decadence, and conserve their marketing specification until end of storage.
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