Factors Affecting of Milk Flow Rate in Friesian
نوع الرسالة


ملف pdf



مصدر الفهرسة وكالة الفهرسة الأصلية / EG-EULC
الوكالة الناسخة / EG-EULC
رمز اللغة رمز لغة النص/ المسارات الصوتية أو العنوان الانفرادي / eng
رمز لغة الملخص / المستخلص / العنوان الفوقي أو الفرعي / eng
رمز لغة الملخص / المستخلص / العنوان الفوقي أو الفرعي / ara
رقم تصنيف ديوى العشرى رقم الطبعة / 21
رقم التصنيف / 636.08
مدخل رئيسي لاسم شخص الاسم الشخصي / Eissa, Manal Zakaria Abd El-Mohseen.
عنوان الوعاء العنوان / Factors Affecting of Milk Flow Rate in Friesian /
بيان المسئولية - جميع المؤلفين و ما له علاقه بالعمل / Manal Zakaria Abd El-Mohseen Eissa ; Supervised By Mahmoud Abd El-Alim Sharaby, Abd El-Razek El-Saied Tag El-Din.
العنوان الموازى وبيانات أخرى للعنوان العنوان/ العنوان الفعلي / العوامل المؤثرة على سرعة الحليب لأبقار الفريزيان.
حقل بيانات النشر تاريخ الناشر او الموزع / 2011.
حقل الوصف المادى الحجم / 78 P. :
تفاصيل ماديه اخرى للوعاء / ill. ؛
أبعاد الوعاء / 28 cm.
تبصرة نوع درجة الرسالة العلمية - أطروحة تبصرة أطروحة / Thesis (M. S.) - Alexabdria University. Damanhour Branch. Faculty Of Agriculture. Department Of Animal Production.
تبصرة ببليوجرافية تبصرة ببليوجرافية، الخ / Includes Bibliographical References And Index.
التبصرة الخاصة بالتعليق أو التلخيص ملخص، الخ / The dairy industry is rapidly changing. Dairies are becoming larger, more productive, and more intensively managed. High-quality labor may be difficult to attract and retain. The recent low milk prices relative to production costs have presented a real obvious field challenges to most of the milk producers. Consumers are increasingly demanding higher quality and safer milk and milk products. Legal levels of somatic cell counts will likely be altered in the near future due to the newly assigned specifications and hygienic restrictions on human food. These changes require highly technical advancements in milking systems of dairy cows. Cows should be milked efficiently in a manner consistent with the highest possible quality of products and animal health. On most commercial dairies, the milking parlor is a major capital investment. It is also where the primary income of the dairy interprise is harvested, where much of the labor is employed, and where the quality of the product is largely determined. For these reasons, parlor performance and milking efficiency discussions are common in today’s dairy industry. The goal of most dairies is to milk as many high-producing cows as possible during each milking while still allowing time for adequate cleaning of the equipment.
Studies have shown that milk ejection is not entirely dependent on the action of oxytocin but there are many other factors that control the effectiveness of the cow response to the oxytocin action. Several studies indicated an advantage in milk quality and machine-on time by optimizing teat stimulation. Milk quality and udder infection are improved by good preparing procedure of the cow. Also, in herds where there is more than one milker, there is usually a great variation in milking routine. All of these factors may contribute to variation in milk quality, yield of milk and udder health as well as efficiency of milking.
Though milk yield is the most economically important trait in dairy cattle, it is also important for a dairy cow to have the shortest secretion time of milk. In productivity evaluation of a dairy cow, her udder measurements are important factors and may influence her milk production and her milking characteristics. In addition, teat shape and teat measurements are also of equal importance to the cow productivity and milking behavior. The rate of the dairy cow udder evacuation is an important productivity trait which has an economic impact on the revenue of the dairy farm. It determines the speed at which cows can be milked, which in turn has an effect on the number of cows that can be milked per labor hour. It is well known that in practice, cows slow to milk are not desirable and genetic selection against their milking characteristic would be appreciated by dairymen.
A dairy operation is considered economically efficient if the production costs over returns are minimized. The labor requirements form a considerable proportion of the production costs, and therefore, decreasing the labor requirements of a dairy operation may improve its net returns. The number of cows milked per hour of labor as well as the amount of milk sold per man can be used as indicators of the efficiency of a dairy operation. Milkability, milking speed, milk flow rate, and milking ease are different expressions used in several publications for demonstrating the magnitude of one of the most important functional traits in dairy cattle. Milkability can be considered an important functional trait in dairy cattle with regard to udder health as well as to labor efficiency. Particularly the duration of decreasing milk flow is considered to be an important trait with respect to udder health.
Increased milking speed is associated with decreased milking labor time which has a significant effect on the expenses paid in the harvest of milk. Decreased milking time per cow implies decreased costs of electrical power and decreased wear on milking equipments. Unfortunately, increased milking speed may also be associated with increased incidence of clinical mastitis. Increased milking speed can be a result of decreased tension of the teat sphincter muscle and a relatively weak sphincter muscle provides less resistance to infection of udder by pathogens. There is evidence that daughters of AI sires can be evaluated for a subjective assessment of milking speed. Similarly are the udder conformation traits which are evaluated during their first lactation, which implies that the information on these daughters can be incorporated into an udder health index in association with milking speed relatively early in the period of active service of bulls. Operating such selection schemes for milking speed requires several phenotypic measurements. Milking speed can be measured as threshold traits and cows can be classified into categories, or can be alternatively recorded for duration of milking during routine test day.
Increases in herd size, developments of new milking equipment and .
تبصرة اللغة اللغة / Text In English, Abstracts In English And Arabic.
رءوس الموضوعات مصطلح موضوعي أو اسم جغرافي كعنصر مدخل / Animal Husbandry.
المدخل الإضافي - اسم شخصي اسم شخصي / Sharaby, Mahmoud Abd El-Alim,
مصطلح الرابط / Supervisor.
المدخل الإضافي - اسم شخصي اسم شخصي / Tag El-Din, Abd El-Razek El-Saied,
مصطلح الرابط / Supervisor.
مدخل إضافى - هيئة اسم الهيئة أو اسم السلطة كعنصر مدخل / Alexandria university.
الهيئة التابعة / Damanhour branch.
الهيئة التابعة / Faculty Of Agriculture.
الهيئة التابعة / Department Of Animal Production.
معلومات الرسالة العلمية كود درجة الرسالة M أو D / M.
درجة الرسالة العلمية / Master.
تاريخ منح الرسالة يوم-شهر-سنه / 2011.
هيئة الاشراف / Mahmoud Abd El-Alim Sharaby, Abd El-Razek El-Saied Tag El-Din.
بيان النسخ
موقع النسخة الرقم العام رقم الاستدعاء رقم المجلد الترفيف ملاحظه عامة
جامعة دمنهور - كلية الزراعة - مكتبة الرسائل العلمية 391 636.E F   636  
جامعة دمنهور - كلية الزراعة - مكتبة الرسائل العلمية 391.1 636.E F   636