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Register a new userEffect of Harvesting Date on Quality and Storage Ability of Coscia Pear Cultivar Fruit
تأثير موعد القطاف في الجودة و القدرة التخزينية لثمار الأجاص صنف الكوشيا
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Damascus University ورقة بحثية
Publication date
2010
fields
Groves
and research's language is
العربية
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درس تأثير مواعيد القطاف المختلفة في الجودة و القدرة التخزينية لثمار صـنف الأجـاص الكوشـيا Coscia المزروعة في منطقة ظهر الجبل بالسويداء خلال موسمين متتاليين 2007-2008 . بحيـث تـم قطاف الثمار بثلاثة مواعيد مختلفة بفاصل زمني ثابت (أسبوع)، و خزنت مدة سبعة أشـهر فـي درجـة حرارة 0-1 م° و رطوبة نسبية 90-95 % في وحدات التخزين التابعة لقسم بحوث التفاحيات و الكرمـة. و درِس تأثير مواعيد القطاف في الصفات الفيزيائية و الكيميائية للثمار. و قد أثر موعد القطاف الثاني فـي تقليل نسبة الفقد بالوزن % و نسبة العفن % و نسبة الحموضة القابلة للمعايرة % و كميـة النـشاء فـي و زيادة نسبة المواد الصلبة الذائبة الكلية % و رقم الحموضة و عمر الرف 2 الثمار و درجة الصلابة كغ/ سم و القدرة التخزينية للثمار مقارنة بالثمار المقطوفة بالموعد الأول و الثالث.
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 different 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.
References used
Acuna, M. V. and E. J. Mitcham. (2008). Ripening of European pears: The chilling dilemma. Postharvest Biology and Technology Journal. Vol. 49 (2): 187-200
Akhavan, I. and R. E. Wrolstad. (1980). Variation of Sugars and Acids During Ripening of Pears and in the Production and Storage of Pear Concentrate. Journal of Food Science. Vol. 45 (3): 499-501
Bai, J., P. wu, J. Manthey, K. Goodner and E. Baldwin. (2009). Effect of harvest maturity on quality of fresh-cut pear salad. Postharvest Biology and Technology Journal. Vol. 51 (2): 250-256
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Grape Vitis Vinifera L. var. "Baladi" was fumigated with acetic acid at two
concentrations 75 and 100 %, during two successive seasons 2008/2009, to study
their effect comparing of sulfur dioxide pads and control. However, Sulfur
dioxide pads were
packed in 40 μm polyethylene bags thickness at two
concentrations 1 and 1.5 g/ kg fruit. All treatments were stored at 0 ± 1 Cº and
90-95% RH for three months, in cooling units of pome and vine research
department in Swaida. Chemical and physical properties were assessed every
15 days intervals, and in every time shelf life was measured for three days at
room temperature and calculated as total loss %. Acetic acid treatment effected
as well as or better than sulfur dioxide pads during cold storage. Which, acetic
acid fumigation decreased weight loss %, decay % and berry shatter %,
moreover, berry adherence strength (g) and berry firmness (kg/cm2) were
increased, but T.S.S %, total acidity % and sugars % have not significant
differences comparing to sulfur dioxide fumigation and control. In addition to
that, the application of acetic acid increased shelf life in days by decreasing
total loss %; also this treatment improved some sensory properties and was
satisfied for consumer demand.
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". Th
e 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.
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.
هدف هذا البحث إل دراسة تاثير بعض معاملات ما بعد القطاف في القدرة التخزينية وجودة ثمار البرتقال صنف فالنسيا في ظروف التخزين المبرد.
Apple Fruits (Malus domestica Bork. cv. 'Golden Delicious') were
harvested at three successive dates with intervals of one week between each
date. The fruits were packaged with polyethylene films and then stored at 0±1
oC to study the effect of th
ese factors on the quality of the fruits and their role
to reduce weight loss after harvest. The natural loss of the fruit weight and
quality indices: fruit firmness, total soluble solids, titrable acidity and starch
content were studied.
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