Journal of Agricultural Research最新文献

{"title":"دراسة لبعض مؤشرات التجارة الخارجیة المصریة لزیت الذرة الشامیة وزیت دوار الشمس","authors":"هبه عبد النبي محمد","doi":"10.21608/zjar.2020.110338","DOIUrl":"https://doi.org/10.21608/zjar.2020.110338","url":null,"abstract":"بالرغم من الأهمیة الغذائیة والاقتصادیة لمحصولی الذرة الشامیة ودوار الشمس فى مصر، وعلى الرغم من أن مصر تحتل الصدارة فى إنتاجیة الفدان للمحصولین على مستوى العالم إلا أن الزیادة المستمرة فى معدلات السکان والتى یصاحبها زیادة فى معدلات الاستهلاک الغذائى بصفة عامة والزیوت النباتیة الغذائیة بصفة خاصة هذا من ناحیة، بالإضافة إلى التناقص المستمر للمساحة المزروعة بالمحاصیل الزیتیة من ناحیة آخرى، کل هذه العوامل أدت إلى عجز شدید فى معدلات الإکتفاء الذاتى وإتساع الفجوة بین کلا من الإنتاج والإستهلاک المحلى لزیوت تلک المحاصیل مما یستدعى اللجوء إلى إتباع سیاسة الإستیراد من الخارج لسد هذا العجز. مما أدى إلى حدوث إختلالات أثرت بدورها فى المیزان التجارى الزراعى المصرى، انطلاقا من مشکلة الدراسة فإن الهدف الاساسى لهذه الدراسة القیام بدراسة تحلیلیة للتجارة الخارجیة الزراعیة لأهم الزیوت النباتیة (الذرة الشامیة - دوار الشمس) فى جمهوریة مصر العربیة خلال متوسط الفترة (2000 - 2017) بصفه عامة، کما تهدف الدراسة بصفة خاصة إلى: دراسة تحلیل الوضع الراهن والموقف الإنتاجى والإقتصادى لأهم الزیوت النباتیة (الذرة الشامیة - دوار الشمس) فى مصر لبحث إمکانیة زیادة الإنتاج من الزیوت النباتیة لتضییق الفجوة الزیتیة وبحث إمکانیة التوسع الافقى والرأسى فى المحاصیل الزیتیة، ودراسة التوقعات المستقبلیة للطاقة الانتاجیة وحجم الفجوة الغذائیة ونسبة الإکتفاء الذاتى ومتوسط نصیب الفرد فى جمهوریة مصر العربیة. ودراسة تطور کمیة وقیمة الصادرات وسعر تصدیر الطن للمحاصیل موضع الدراسة، ودراسة تطور کمیة وقیمة الواردات وسعر استیراد الطن لزیوت المحاصیل موضع الدراسة، وبدراسة تطور بعض مؤشرات التجارة الخارجیة لزیت الذرة الشامیة فى جمهوریة مصر العربیة، تم التوصل إلى النتائج التالیة: فیما یتعلق بصادرات زیت الذرة الشامیة بلغت نسبة الزیادة فی کل من کمیة وقیمة الصادرات وسعر تصدیر الطن من زیت الذرة الشامیة نحو 36926.3%، 147127.6% و235.87% على الترتیب، أما فیما یتعلق بواردات زیت الذرة بلغت نسبة الزیادة کمتوسط للفترة (2000-2017) فی کل من کمیة وقیمة الواردات وسعر إستیراد الطن من زیت الذرة الشامیة نحو 454.6%، 1566.8% و473.4% على الترتیب، وبدراسة تطور بعض مؤشرات التجارة الخارجیة لزیت دوار الشمس فى جمهوریة مصر العربیة، تم التوصل إلى النتائج التالیة: فیما یتعلق بصادرات زیت دوار الشمس بلغت نسبة الزیادة فی کل من کمیة وقیمة الصادرات وسعر تصدیر الطن من زیت دوار الشمس نحو 35159.3%. 57974.5%.575.94% على الترتیب، أما فیما یتعلق بواردات زیت دوار الشمس بلغت نسبة الزیادة کمتوسط للفترة (2000-2017) فی کل من کمیة وقیمة الواردات وسعر إستیراد الطن من زیت دوار الشمس نحو 2597.5%. 7321.7%. 344.3% على الترتیب، ومن أهم التوصیات التى توصلت إلیها الدراسة ضرورة النظر فى هیکلة سیاسیة التجارة الخارجیة  للزیوت المصریة لکى تسایر خطط التنمیة الاقتصادیة وتحقق مستوى الرفاهیة المطلوبة. والعمل على إنتاج محصول عالى الکفاءة للحد من إستیرادها من الخارج ولکى یتم ذلک یجب التوسع الأفقى للمحاصیل موضع الدراسة فى الأراضى المستصلحة والتى تجود زراعتها فى هذه الأراضى، وکذلک التوسع الرأسى عن طریق إستحداث أصناف عالیة الجودة والإنتاجیة، والسعى لتحقیق فتح أسواق جدیدة لتصدیر محاصیل الزیوت موضع الدراسة، وإعادة التوزیع الجغرافى لصادرات محاصیل الزیوت موضع الدراسة من ناحیة وزیادة کمیة الإنتاج من ناحیة أخرى للعمل على رفع کفاءة الجهاز التصدیرى المصرى من هذه المحاصیل. وإعطاء الدولة ض","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"1115-1124"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42746945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPACT OF FOLIAR AND SOIL FERTILIZATION ON PRODUCTIVITY AND QUALITY OF SOME SOYBEAN CULTIVARS UNDER CALCAREOUS SOIL CONDITIONS","authors":"A. Zahra, S M R Engy","doi":"10.21608/zjar.2020.110314","DOIUrl":"https://doi.org/10.21608/zjar.2020.110314","url":null,"abstract":"A field experiment was conducted at Nubaria Agricultural Research Station Farm,  Alexandria, Egypt, during 2015 and 2016 summer seasons  to evaluate the efficiency of three fertilization treatments (i.e. T1: recommended dose of soil  fertilizers of 48 kg N /ha + 72 kg P2O5/ha and 57.6 kg K2O/ha, T2: 50% of the previous recommended dose of 24 kg N/ha +36 kg P2O5/ha and 28.8 kg K2O/ha with foliar application of  phosphoric acid (0.025%) and potassin (1.8 ppm). T3: foliar application of phosphoric acid (0.025%) and potassin (1.8 ppm) only) on growth, productivity and quality of three soybean cultivars, Giza 21, Giza 22 and Giza 111. The results revealed significant differences among studied cultivars in crop growth rate, chlorophyll content, plant height, number of branches/plant, number of pods/plant, 100-seed weight, seed yield/ha, oil and protein yields/ha, Seed oil (%), seed protein content, seed phosphorus (%), seed potassium (%), straw nitrogen (%), straw phosphorus (%) and straw potassium (%) in both seasons and their combined analysis with superiority of Giza 111 in all studied traits followed by Giza 21, while Giza 22 recorded the lowest values for such traits except  plant height, where Giza 22 cv gave the tallest plants  (115.1 cm). Differences due to fertilization treatments were significant   for all   studied traits, where   T2 treatment (50% of the recommended dose of N, P and K + phosphoric acid and potassin) outperformed the other treatments followed by T1 treatment, while the T3 treatment gave the lowest values. The interaction between cultivars and fertilization treatments significantly influenced on No. of branches/plant, chlorophyll content and seed oil (%) in the first season and seed phosphor (%) in both seasons. In general, the highest value of seed yield/ha was obtained from Giza 111 cultivar meanwhile, the treatment of 50% recommended dose of N, P and K + phosphoric acid and potassin gave also the best seed yield/ha. Seed yield (ton/ha), was positively and significantly correlation with each of number of branches/plant (0.834*), number of pods/plant (0.956**), 100- seed weight (0.824*), oil yield (ton /ha) (0.954**), protein yield (ton/ha) (0.988**) and cholorophyll content (0.965**).","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"867-881"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44949816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MAXIMIZE WATER PRODUCTIVITY USING AQUACULTURE WATER FOR SESAME CROP UNDER DRIP IRRIGATION SYSTEMS","authors":"A. Soliman","doi":"10.21608/zjar.2020.110327","DOIUrl":"https://doi.org/10.21608/zjar.2020.110327","url":null,"abstract":"Aquaculture has become an important economic activity in many countries, so the main aim of the present research is to study the effect of using aquaculture drainage as non-traditional source for promoting sesame crop yield. Experiments were carried out on sesame crop in sandy soil of Wadi El-Natroon using two water resources (well and aquaculture) with different nitrogen fertilizer ratios (20, 60 and 100%) under drip irrigation systems (surface and subsurface). The effect of previous parameters was evaluated in terms of the amount of applied water, water use efficiency, nitrogen use efficiency, crop characteristics (capsule number/plant, plant length, total seed yield) added to economic analysis. Experimental results revealed that aquaculture drainage gave the best results in all aspects compared to the use of well water. Water use efficiency was increased by increasing nitrogen fertilizer rate, while vice versa was observed with nitrogen use efficiency. The optimum obtained conditions for sesame crop were noticed by using aquaculture drainage with 60 % nitrogen fertilizer rate resulting in 40% fertilizer saving comparing with well water. These previous conditions gave (0.21 and 0.2 kg/m3) water use efficiency, (5.11 and 4.61 kg/kg) nitrogen use efficiency, (465.33 and 418.33 kg/fad.) crop yield with (10983 and 10093 LE/fad.) net return and (5.01 and 4.91 LE/m3) water productivity for surface and sub-surface irrigation systems, respectively.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"989-998"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45239652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"بعوض جنس الکیولکس Culex وعلاقته بنقل مسبب مرض داء الفیل","authors":"محمد سمیر حافظ محمد متولى","doi":"10.21608/zjar.2020.110322","DOIUrl":"https://doi.org/10.21608/zjar.2020.110322","url":null,"abstract":"تهدف هذه الدراسة لإلقاء الضوء على البعوض الناقل لمرض داء الفيل من حيث الصفات العامة و دورة الحياة والأهمية الطبية والبيطرية حيث يعد جنس Culex من أکثر الأجناس الناقلة للمرض، کما تلقى الضوء على مرض داء الفيل الذى يعتبر من الأمراض المدارية المستوطنة (أعراضه، أسبابه، إنتشاره، المسبب المرضى، طريقة العدوى والوقاية والعلاج).","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"941-950"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49064247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PERFORMANCE EVALUATION OF POULTRY HOUSES UNDER DIFFERENT EVAPORATIVE COOLING SYSTEMS","authors":"S. Abdel-Rahman","doi":"10.21608/zjar.2020.110328","DOIUrl":"https://doi.org/10.21608/zjar.2020.110328","url":null,"abstract":"Poultry production occupied a major role in the agriculture industry worldwide. Poultry housing design plays a vital role in determination of the internal climatic conditions for optimum health, growth and productive performance of the poultries. The present investigation aimed to evaluate the performance of different evaporative cooling systems with environmental control of poultry houses. The effect of two different evaporative cooling systems (direct and indirect) under three water flow rates of 2, 4 and 6 l/min.m on poultry houses performance was evaluated in terms of temperature reduction, relative humidity, evaporative cooling efficiency, poultry weight, consumed energy and cost. Experimental results revealed that using direct evaporative cooling system with 4 l/min.m water flow rate and indirect evaporative cooling system with 2 l/min.m water flow rate provided sufficient conditions of temperature reduction (9.59 and 7.28C), relative humidity (63.88 and 61.21%), cooling efficiency (75.67 and 83.67 %), poultry weight (2.4 and 2.3 kg) and consumed energy (1.2 and 6 kW.day) with net return (7.54 and 5.80 LE/kg), in that order. Based on previously mentioned results, it is recommended to use direct evaporative cooling system for poultry houses as it minimizes both energy and cost requirements compared to the indirect evaporative cooling system, therefore it was found to be suitable for small rural farmers.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"999-1010"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44205268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MONITORING AND MANAGEMENT OF THE COTTON MEALYBUG, Phenacoccus solenopsis TINSLEY INSECT AND ITS ASSOCIATED NATURAL ENEMIES ON GREEN BEAN PLANTS","authors":"Amany M.S.U.H. Elbahrawy","doi":"10.21608/zjar.2020.110320","DOIUrl":"https://doi.org/10.21608/zjar.2020.110320","url":null,"abstract":"Field studies were conducted on cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Sternorrhyncha: Coccoidea: Pseudococcidae) which infested green bean plants at Atfih distract, Giza Governorate, Egypt during two successive summer and nili seasons of 2016 and 2017. The population density, activity periods and the effects of some weather factors on P. solenopsis and its associated natural enemies were considered. The obtained results revealed that in summer season the total numbers of alive stages had one peak of activity in the 3rd of July during the first and second seasons (2016 and 2017), successively. While, in nili season the total number of alive stages had one peak of activity in the 3rd and the 17th December, during the first and second seasons (2016 and 2017), respectively. The total effects of some weather factors such as maximum and minimum air temperature (°C) and relative humidity percentage (RH%) showed significantly positive relationship with the cotton mealybug population. During this study, three hymenopterous solitary endparasitoids and four predacious species were recorded. The parasitoids were Aenasius arizonensis (Girault), Anagyrus pseudococci (Girault) and Acerophagus gutierreziae Timberlake (Encyrtidae). The predacious ones were Scymnus syriacus Mars., Coccinella undecimpunctata (L.) (Coleoptera: Coccinellidae), Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) and Orius laevigatus (Fiber.) (Hemiptera: Anthocoridae). In an attempt to control this insect pest specie, eight insecticides namely, mineral oil, lufenuron, chlorpyrifos, malathion, deltamethrin, buprofezin, thiamethoxam and imidacloprid were tested on P. solenopsis and its natural enemies on green bean under field conditions. The obtained resultsindicated that imidacloprid was the highest efficacy against P. solenopsis recording 90.71–89.17% reduction of the insect population after 21 days of application. Also imidacloprid was the highest efficacy against parasitoids and predators of the cotton mealybug. IGRs toxicants (buprofezin and lufenuron) found to be safer to the predacious insects than other tested insecticides.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"895-907"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43284066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pan-European multi-crop model ensemble simulations of wheat and grain maize under climate change scenarios","authors":"D. Cooke","doi":"10.18174/odjar.v6i0.16326","DOIUrl":"https://doi.org/10.18174/odjar.v6i0.16326","url":null,"abstract":"The simulated data set described in this paper was created by an ensemble of nine different crop models: HERMES (HE), Simplace (L5), SiriusQuality (SQ), MONICA (MO), Sirius2014 (S2), FASSET (FA), 4M (4M), SSM (SS), DSSAT-CSM IXIM (IX). Simulations were performed for grain maize (six models) and winter wheat (eight models) under diverse conditions over agriculturally relevant areas in the EU-27 at a 25 x 25 km spatial resolution. Simulations were drawn from combinations of three representative concentration pathways and climate outputs from five general circulation models for time periods 2040-2069 and 2070-2099. Historical climate data was the basis for simulation years 1980-2010 and considered as a baseline. Simulation results from 1980-2010 and 2040-2069 were used to analyze crop responses to changing climatic variables and their diverging sensitivities to these variables. This data paper describes the creation, motivation and format of the simulation results to enable others to use the data set.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"6 1","pages":"21-27"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42877910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF PARTIAL OR COMPLETE REPLACEMENT OF SOYBEAN MEAL WITH LEAF PROTEIN CONCENTRATE MEAL IN NILE TILAPIA DIETS ON GROWTH PERFORMANCE AND BLOOD CONSTITUENTS","authors":"M. Abdel‐Rahman","doi":"10.21608/zjar.2020.110330","DOIUrl":"https://doi.org/10.21608/zjar.2020.110330","url":null,"abstract":"The current trial was conducted to study the effects of partial replacement of soybean meal (SBM) with leaf protein concentrate mixture (LPCM) from carrot and sugar beet leaves in Nile tilapia diets on growth performance, body composition and blood biochemical parameters. Three diets were formulated by replacing 0, 50 and 100% of protein from SBM with LPCM (control, LPCM50, and LPCM100, respectively). Each diet was fed to three replicate groups of fish (initial body weight: 5.03 ± 0.01 g) for 12 weeks. Results showed that dietary LPCM substitution significantly decreased final weight, weight gain, specific growth rate, and feed intake of juvenile tilapia. No significant differences in feed conversion ratio and survival rate were observed among the experimental groups. Condition factor significantly increased in fish groups LPCM50 and LPCM100 compared with those in control. Fish fed LPCM50 and LPCM100 diets had lower crude lipid content than the control group. Regarding all blood biochemical and hematological parameters, no significant differences were observed among all groups. However, the relative margin was increased by 12.83% in LPCM100 group, while decreased by 5.88% in fish group LPCM50 compared with the control one. These findings demonstrated that partial or complete replacement of SBM protein with LPCM has impaired growth performance of O. niloticus, without any negative effect on blood constituents. In addition, the relative margin was increased significantly in O. niloticus fed LPCM100 diet.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"1025-1034"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49595828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPACT OF IRRIGATION WATER REGIMES AND ANTI-TRANSPIRATIONS WITH HYDRO-GEL ON NUTRITIONAL STATUS OF PEANUT GROWN IN SANDY SOIL","authors":"H. Elshahawy","doi":"10.21608/zjar.2020.110324","DOIUrl":"https://doi.org/10.21608/zjar.2020.110324","url":null,"abstract":"Two field experiments were carried out on a newly reclaimed sand soil under drip irrigation system at Ismailia Agricultural Research Station, Ismailia Governorate, Egypt located between Latitude 30° 35' 30\" N, Longitude 32° 14' 50\" E and Elevation 3 meters, and cultivate with peanut plants as summer season (Arachis hypogaea, Giza 5 c.v) during the agricultural growing season of 2016 and 2017 at rate of 50 kg fad-1. To evaluate foliar application of some anti-respiration (chitosan at rate of 0.0, 5.0, 10.0) and (abscisic acid at rate of 0.0, 15.0, 20.0 mg l−1), as foliar spray afternoon at three times after three weeks from sowing (30, 60 and 90 days) and applied hydrogel at rate of zero, 2 and 3% as soil application under two irrigation water requirements 100 and 75% (1125 and 884 m3 fad.-1). Results obtained showed that: It was clear that applied irrigation water requirements at rate 100% with foliar spray of 5 mg l-1 chitosan and soil application of hydro-gel at rate of 2% on both seed yield of peanut and contents of macro-nutrients (N, P and K) and micro-nutrias (Fe, Mn and Zn) for seeds and high water use efficiency at irrigation water requirements 100% accompanied with foliar application of abscisic acid and hydrogel at rate of 3%. \u0000Irrigation water, anti-raspirations, drip irrigation system, nutritional status, peanut plants, sandy soils.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"963-974"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42328919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPMENT AND PERFORMANCE EVALUATION OF MILK PASTEURIZATION UNIT","authors":"A. Desoky","doi":"10.21608/zjar.2020.110326","DOIUrl":"https://doi.org/10.21608/zjar.2020.110326","url":null,"abstract":"The main objective of the present investigation was to use the modern technological modifications for the milk pasteurization process. The original milk pasteurization unit was developed especially for the present work by adding a pneumatic regulating valve to improve its performance. The performance of the milk pasteurization unit before and after development was experimentally studied under four different heating temperatures (70, 74, 77 and 80oC), four different vapor pressures (200, 400, 600 and 800 kPa) and four different cooling temperatures (3, 4, 5 and 6oC). Evaluation of the milk pasteurization unit was carried out taking into consideration pasteurization unit productivity, heating rate, fuel consumption, energy requirements, bacteria count and final product quality. The experimental results revealed that pasteurization unit productivity (258 kg/hr.), heating rate (4.9oC/s) fuel consumption (144 l/hr.), energy requirements (1.74 kW.hr./kg ) and bacteria count (35), were in the optimum region under conditions of using the developed milk pasteurization unit at 74oC heating temperature, 400 kPa vapor pressure and 4oC cooling temperature.","PeriodicalId":14975,"journal":{"name":"Journal of Agricultural Research","volume":"47 1","pages":"975-988"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49557396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}