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Home > Studies on the Ripening Aspects and Fruit Quality of Date Palm Phoenix Dactylifera L. Cvs. “Hillawi and Khadrawi”

Studies on the Ripening Aspects and Fruit Quality of Date Palm Phoenix Dactylifera L. Cvs. “Hillawi and Khadrawi”

Thesis Info

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Author

Hussain, Imtiaz

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2015

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/6954/1/Imtiaz_Hussain_Horticulture_2015_UAF.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727350404

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Date palm is an important fruit crop in the world as well as in Pakistan. It provides a rich and quick energy source to humans and also plays a significant role in the social and economic life of the people living in dry areas. Monsoon rains at the time of fruit harvesting or ripening are very harmful and heavy fruit losses occur resulting rotting, fruit drop and uneven fruit ripening. Unfortunately, in Pakistan serious losses occur due to these rains at the time of fruit harvesting/ripening. The research work reported in this manuscript was conducted in the Experimental Fruit Orchard Square Number 9 and Post Graduate Agricultural Research Station (PARS) (Latitude 31o-26´ N, Longitude 73o-06´ E and Altitude 184.4 m), Institute of Horticultural Sciences, University of Agriculture Faisalabad, Punjab Province, Pakistan. In the field studies, effectiveness of ethephon application (foliar and injection) and strands thinning practices on ripening acceleration and fruit quality of date palm were investigated and found that ethephon application with spray showed superiority over injection method to accelerate the maturity and ripening processes of date fruits in both Hillawi and Khadrawi cultivars. Fruit sprayed with ethephon (4 ml/L and 2 ml/L) at final kimri and early khalal stages reached at rutab stage 13 and 6 days earlier and showed uniform fruit ripening indexes of 60.46 and 44.85% and rutab fruit yield (6.29 and 4.37 kg ) per bunch with good fruit quality composition than the untreated fruits. Second field experiment was conducted to explore the role of strands thinning on maturity enhancement and fruit quality. Strands thinning practices were carried out with following intensities (no thinning, 20% RCS (removal of central strands), 30% RCS, 20% STT (shortening of terminal tips), 30% STT, 20% RCS + 20% STT and 30% RCS + 30% STT) at early kimri stage (4 weeks after pollination). It was observed that strands thinning practices improved quality characteristics than the fruit those were untreated (without thinning) in both cultivars. Strands thinning intensity @ 30% RCS alone resulted in 10 days earlier maturity and higher rutab yield of 5.22 kg per bunch and more uniformly ripe fruit (76.28%) at rutab stage. The total soluble solids, ascorbic acid, sugars (glucose, fructose and sucrose), total phenolic, total flavonoids and total antioxidants were significantly improved while titratable acidity and total tannin contents were decreased in thinned fruits. In post-harvest experiments, hot water exposures for 3 and 5 min at 65oC in Hillawi and Khadrawi cultivars reduce the fruit ripening period up to 6 days and produced uniformly ripened fruit (73.33 and 81.66%) with better quality and higher acceptability of organoleptic scores marked by the panellists as compared to 2 untreated fruit. Acetic acid @ 3% showed higher uniform ripening index of 64.24% with higher total soluble solids, sugars, total phenolic, total flavonoids, total antioxidants and organoleptic properties after incubation at 40±1oC for 72 h. In the last study different sun drying techniques were used for the curing of soft Hillawi dates. Among different sundrying techniques, SDT4 (DSE with removal in baskets and covered during night) proved good regarding the fruit quality composition such as TSS, acidity, total sugar, reducing sugar, total phenolics, total antioxidants, total flavonoids with lower amounts of total tannin contents. In conclusion, a spray application of ethephon @ 4 ml/L at final kimri stage, strands thinning @ 30% RCS alone at early kimri stage, hot water treatments at khalal stage (3 min for Hillawi and 5 min for Khadrawi) and acetic acid @ 3% at khalal stage showed better results to accelerate the fruit ripening period and produced higher index of uniformly ripe fruits with good fruit quality composition in both date palm cultivars. Among different sun-drying techniques in fruits harvested at rutab stage, SDT4 (DSE with removal in baskets and covered during night) proved good regarding the fruit quality composition in Hillawi date palm cultivar. Uniformity in ripening gave extra benefits and higher economic returns were achieved by adopting these technologies and it provided higher economic return.
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ان کو خبر نہیں کہ لہو بولتا بھی ہے

ان کو خبرنہیں کہ لہو بولتا بھی ہے
نحمدہ ونصلی علی رسولہ الکریم امّا بعد فاعوذ بااللہ من الشیطن الرجیم
بسم اللہ الرحمن الرحیم
معزز اسا تذہ کرام اور میرے ہم مکتب شاہینو!
آج مجھے جس موضوع پر گفتگو کرنی ہے وہ ہے:’’ان کو خبرنہیں کہ لہو بولتا بھی ہے ‘‘
جنابِ صدر!
ہر اک کا انداز گفتگو مختلف ہے، فلک کی فضاء میں طیور بولتے ہیں، جنگل و بیاباں میں درندے بولتے ہیں، گھر میں کو چہ گرد مرغ بولتے ہیں، رات کی تنہائیوں میں مختلف جانور آوازیں نکالتے ہیں، فصیح زبان میں حیوان ناطق بولتے ہیں، انسانوں کے گروہ کانمائندہ انسان زبان کھول کر بولتا ہے۔
معزز سامعین!
جو عظمت کی داستاں رقم کر جاتے ہیں، جو اپنی جان کا نذرانہ پیش کر کے تاریخ کے اوراق کی زینت بن جاتے ہیں، جو زندگی کی بازی ہار کر بھی دامنِ حیات سے وابستہ رہتے ہیں وہ لوگ زندگی میں نہیں بعد از وفات بھی فلک جرأت و شجاعت پر آفتاب بن کر چمکتے ہیں۔ ان کی رگوں میں دوڑنے والا خون بھی حرارت و تمازت لیے ہوتا ہے اور شہادت کی منزل پر فائز ہونے کے باوجود بھی ان کا لہو بولتا ہے۔ جیسے آج کل کشمیر کے مجاہدین دشمن کے خلاف صف آرا ہیں۔
جنابِ صدر!
زندگی کے پر لطف لمحات گزارنے کے بعد جب وہ شہادت کے مقام پر رفیعہ کے حصول میں کامیاب ہوتے ہیں تو ان کے جسم سے بہنے والا خون بھی پس ماندگان کے لیے مہمیز ثابت ہوتا ہے اور یہی اس کی آواز ہے کہ انسانیت کے دامن سے مر بوط لوگ ایک ایسے جذبے سے حصول منزل کے لیے مستعد ہو جاتے ہیں۔
جنابِ صدر!
قوموں کی زندگی میں کچھ ایسے لمحات بھی آتے ہیں۔ جب انہیں تاریخ کے نازک ترین...

Students’ Perceptions Toward Bilingual Education at Icp Chemistry Education in Makassar

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Evaluation of Different Bait Formulations for the Management of Indian Crested Porcupine, Hystrix Indica Kerr

Field trials were conducted in Abbotabad-Balakot tract (Pakistan), during April 2004 to January 2007 to select cheap, locally available and suitable bait formulations for Indian crested porcupine (Hystrix indica) and tested these for their potentials to carry lethal quantities of rodenticides. Results of no-choice, multiple-choice and paired-choice tests revealed that groundnut was preferred, both in the whole and cracked forms, over maize, wheat, millet, rice, gram and oats. All the food items were consumed in significantly higher quantities than in their whole form, except for rice. Consumption of all the food grains significantly increased with increasing length of its exposure to the novel food, indicating a careful nature of the species in selecting new food. No-choice tests revealed that groundnut - maize 1:1 mixture can be cost effective bait base and its consumption was not signiifcantly different from that of pure groundnut. Saccharin (5%) supplemented groundnut – maize (1:1) bait was consumed in significantly higher quantities, while all other aditives (common salt, egg yolk, egg shell powder, fish meal, peanut butter, mineral oil, bone meal, coconut oil and yeast powder) at both 2% and 5% concentrations and saccharin at 2% concentration did not significantly increase the intake of groundnut – maize (1:1) bait. Consumption of bait, offered after 3 days of pre-baiting, significantly declined when poisoned with 3% zinc phophide and such effects were delayed with 2% and 1% zinc phosphide. Groundnut – maize (1:1) poisoned with 2% zinc phosphide resulted in maximum decrease (55%) in porcupine burrow activity. Strychnine alkaloid (2%) added groundnut – maize (1:1) bait was seriously shuned by porcupine and caused minimum reduction (25%) in burrow activity. Coumatetralyl (0.0375%) added bait caused the highest reduction (80%) in burrow activity. Saccharin (5%) supplemented poison baits were more acceptable and caused some 10% higher reduction in burrow activity using allpoison cereal bait formulations. Field trials on fresh food items suggested that guava was preferred over potato, carrot and sweet potato. Peanut butter did not significantly increase consumption of guava. Consumption of zinc phosphide impregnated guava, offered after 3 days of pre- baiting, exhibited a decline and no bait was consumed on 3 rd day of poison baiting. Decline was the most rapid with 3% zinc phosphide and minimum with 1% zinc phosphide. Maximum reduction in burrow activity (55%) was recorded with 2% zinc phosphide, followed by 1% (35%) and 3% (25%). Fumigation of porcupine burrows with aluminium phosphide tablets produced 100% reduction in burrow activity, by applying 8 tablets per burrow, 85%, by 6 tablets and 75% by 4 tablets per burrow. A 100% reduction in burrow activity was recorded by applying 4 tablets of aluminum phosphide per burrow in small, 6 tablets in medium and 8 tablets in large burrows. The present study suggested that initial control of the porcupine can be achieved by applying 2% zinc phosphide using guava or 1:1 groundnut – maize mixture supplemented with 5% saccharin. Coumatetralyl (0.0375%) poisoned bait can give a higher control of porcupine, yet involves a higher labour cost and can used as a second line of action. Fumigation of burrows with aluminum phosphide is though cost effective and can be used in the porcupine management programme, yet is non- specific in its action and hence can be pressed into action under emergent conditions only.