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العنوان
Studies on Second Year Performance of Force Molted hens in some Local Chicken Breeds /
المؤلف
Ghatas, Mervat Samy.
هيئة الاعداد
باحث / Mervat Samy Ghatas
مشرف / Khairy Abd EL-Hamid
مشرف / Ahmed Mohamed Osman.
الموضوع
Animal Production. Local Chickens.
تاريخ النشر
1994.
عدد الصفحات
67 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
علم الحيوان والطب البيطري
تاريخ الإجازة
1/1/1994
مكان الإجازة
جامعة المنيا - كلية الزراعة - Animal Production Dep.
الفهرس
Only 14 pages are availabe for public view

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Abstract

In the light of the data obtained from the study it may be concluded that,
1- It is apparent that flocks should be kept for more than one laying cycle and should be force molted rather than allowed to molt naturally. Force molting results in better quality eggs ,higher production, and the flock manager can control the age at which molting occurs. Because, at the end
natural molt if it is retained for a second cycle without being subjected to a force molt. However, under natural
peak fall egg prices, it is highly recommended today in poultry industry. The poultrymen who have successfully force molted yearling hens have claimed that flocks which are force molted not only produced more eggs but also produced eggs of improved grades during the fall months, than do flocks which are permitted to lay and molt normally.
3- Relating egg quality to force molting leads one to conclude that, on returing to production after a force
molt, a flock lays eggs with thicker, stronger shells, and a higher percentage of thick white than eggs laid just before molting. The extent of the recovery in quality depends on molting method, age of birds, and possibly other factors, such as strain of bird and season of the year.
4- Based on egg production, the Dandarawi hens (light strain) had shown the greatest response to force molting program, while, the Mandarah hens (heavy strain) had shown the least response.
5- Since the birds were housed in floor- pens, therefore, th’e results may vary because hens could have picked up some nutrients from the litter. These birds require more severe molting program.
6- It is apparent that the selection of the correct molting procedure is a very critical factor in determining performance responses. More research is needed to determine the physiological causes for improved performance following a force molt. Although, non-conclusive, our experiment does tend to support the 7 days or 10 days fasting period, but longer experiments in different season are required for final proof.
7- In general, we would say that, force molting is a tool which can improve income. The question is not a static one and must be re-analyzed whenever performance and/ or economic conditions change.
These conclusions will be of a significant importance to those carrying on force molting program.