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Comparsons of laying performance curves for mamourah and silver montazah local chicken strains [electronic resouce].

By:

Zatter, O. M

Contributor(s):

Nofal, M. E

Language: English Summary language: Arabic Description: p.191-203Other title:

مقارنة منحنيات وصف الأداء الانتاجي للبيض لسلالتي دجاج المعمورة والنتزة الفضي [Added title page title]

Uniform titles:

Egyptian poultry science journal, 2009 v. 29 (I) [electronic resouce].

Subject(s):

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Full Text Article.

In: Egyptian Poultry Science Journal 2009.v.29(I)Summary: The objective of this study was to derive mathematical curves that describe the weekly production of egg number, hen-day rates, egg weight, egg mass (g/hen/day), andproduction efficiency ratio. A total of 296 at 22 weeks old hens of Mamourah and Silver Montazah (148 each strain) were randomly chosen from a large floor-reared flock. Where housed in individual cages, and recorded weekly egg number, egg with and calculated hen day percentage and production efficiency ratio to 28 weeks of production. Results indicated that Silver Montazah hens significantly (P≤5, '0.001) exceeded the Mamourah one in egg number and hen-day percentage, but had lower eggs. While egg mass (g/hen/day) and production efficiency ratio were not affected by strain. All traits studied significantly (P:5, O. 001) increased with age of period production to reach a maximum during 8-12 weeks ofage period production and decreased gradually except egg weight significantly (P≤5, 0.001) increased with advancing age. All traits studied were significantly (P≤5, 0.01) affected by the interaction between strain and age ofperiod production. Curves for egg number, hen-day percentage, egg weight, egg mass and production efficiency ratio of Silver Montazah and Mamourah laying hens described results well where (0. 752 ≤ adj. R2 ≤5, 1.

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The objective of this study was to derive mathematical curves that describe the weekly production of egg number, hen-day rates, egg weight, egg mass (g/hen/day), andproduction efficiency ratio. A total of 296 at 22 weeks old hens of Mamourah and Silver Montazah (148 each strain) were randomly chosen from a large floor-reared flock. Where housed in individual cages, and recorded weekly egg number, egg with and calculated hen day percentage and production efficiency ratio to 28 weeks of production. Results indicated that Silver Montazah hens significantly (P≤5, '0.001) exceeded the Mamourah one in egg number and hen-day percentage, but had lower eggs. While egg mass (g/hen/day) and production efficiency ratio were not affected by strain. All traits studied significantly (P:5, O. 001) increased with age of period production to reach a maximum during 8-12 weeks ofage period production and decreased gradually except egg weight significantly (P≤5, 0.001) increased with advancing age. All traits studied were significantly (P≤5, 0.01) affected by the interaction between strain and age ofperiod production. Curves for egg number, hen-day percentage, egg weight, egg mass and production efficiency ratio of Silver Montazah and Mamourah laying hens described results well where (0. 752 ≤ adj. R2 ≤5, 1.

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