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Register a new userEffect of postharvest treatments on storage ability of lemon fruits Monachello and Enterdonato
تأثير بعض معاملات ما بعد القطاف في القدرة التخزينية لثمار صنفي الليمون Monachello و Enterdonato
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Tishreen University ورقة بحثية
Publication date
2013
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العربية
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يهدف هذا البحث إلى دراسة تأثير المعاملة الحرارية و طريقة التعبئة في القدرة التخزينية و جودة ثمار الليمون للصنفين Enterdonato و Monachello. تم تنفيذ التجربة في وحدة تبريد كلية الزراعة / جامعة دمشق/, حيث خزنت ثمار الليمون على درجة حرارة c°10 و رطوبة نسبية 85% مدة 180 يوماً, و أجريت التجارب المخبرية في مخبر تخزين الفاكهة و الخضار بقسم علوم البستنة بنفس الكلية خلال موسمي 2010-2011 و 2011-2012. عبئ قسم من الثمار بأكياس بولي ايتلين (مثقبة و غير مثقبة) ثخانة 30 ميكروناً و تمت معاملة القسم الآخر بالتغطيس بالماء الساخن (62 °م لمدة 3 ثواني) + المبيد الفطري ثم عبئت بأكياس البولي ايتلين إضافة إلى الشاهد غير المعامل و غير المغلف. أظهرت النتائج تفوق معاملتي التغطيس مع التغليف المثقب و غير المثقب معنوياً على باقي المعاملات و لكلا الصنفين في الحفاظ على نوعية الثمار حتى نهاية التخزين من حيث محتوى فيتامين C و نسبة العصير , حيث يظهر هذا التفوق من خلال حفاظها على نسبة ( 32.89 و %39.06) على التوالي للصنف Monachello و (11.05 و%10.01) على التوالي للصنف Enterdonato من العصير و محتواها من فيتامينC (35.27 و 36.57 مغ/100مل عصير) على التوالي للصنف Monachello و (18 و 11.07مغ/100مل عصير) على التوالي للصنف Enterdonato. كما تبين النتائج الأثر الايجابي للتغليف بأكياس البولي ايتلين /ثخانة 30 ميكروناً/ المترافق مع المعاملة الحرارية في الحد من الفقد الوزني لكلا الصنفين الذي ظهر من خلال خفض نسبة هذا الفقد إلى (51.94 و 68.83%) على التوالي في معاملة التغطيس مع التغليف المثقب كما ظهر دورها الفعال في الحد من تدهور الثمار و الحفاظ على صفاتها التسويقية حتى نهاية التخزين.
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 /Damascus 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.
References used
ASGHARI,M.(2009).Effect of hot water treatment and low density polyethylene bag package on quality attributes and storage life of Muskmelon fruit. ISHS., N.1, 159- 163
BEN-YEHOSHUA,S.;SHAPIRO,B.andMORAN,R.(1987).Individual seal packaging enables the use of curing at high temperature to reduce decay and heal injury of citrus fruits. Hort.Sci., Vol. 22, N.2,771-783
COHEN,E.;SHALOM,Y.and ROSENBERGER,I.(1990). Postharvest behavior of Ortaniques'('Topaz') tangor citrus fruit during long term storage at various temperatures. Sci. Hort.,Vol. 44, N.3, 235-240
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هدف هذا البحث إل دراسة تاثير بعض معاملات ما بعد القطاف في القدرة التخزينية وجودة ثمار البرتقال صنف فالنسيا في ظروف التخزين المبرد.
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.
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.
نفذ البحث خلال الفترة 2013-2016 م في كلية الزراعة بجامعة دمشق , بهدف دراسة تأثير المعاملة ببعض المواد الكيميائية والطبيعية ( 1- ميثيل سكلو بروبان , ونتروبروسيد الصوديوم , الشيتوزان , وأمينوفينل علايسين , والميثيل جاسمونات , وفيتامين E ) في القدرة الت
خزينية لثمار البندورة ( الهجين Tala ) وصفاتها البيوكيميائية ( نسبة المواد الصلبة الذائبة TSS ونسبة الحموضة القاتلة للمعايرة TA ) والفيزيائية ( الصلابة ونسبة الفقد بالوزن والفقد المطلق ومؤشرات اللون ) ومعايير الأكسدة ومضادات الأكسدة .
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.
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