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Khosht, A., mosa, S. (2025). EFFECT OF DIETARY DIFFERENT RATIOS OF COARSE AND FINE LIMESTONE PARTICLES ON EGG PRODUCTION, EGGSHELL AND BONE QUALITIES AT THE PEAK OF EGG PRODUCTION IN GOLDEN MONTAZAH CHICKEN. Egyptian Poultry Science Journal, (), -. doi: 10.21608/epsj.2025.23298.1076
Abeer Rabie Khosht; sahar el sayed mosa. "EFFECT OF DIETARY DIFFERENT RATIOS OF COARSE AND FINE LIMESTONE PARTICLES ON EGG PRODUCTION, EGGSHELL AND BONE QUALITIES AT THE PEAK OF EGG PRODUCTION IN GOLDEN MONTAZAH CHICKEN". Egyptian Poultry Science Journal, , , 2025, -. doi: 10.21608/epsj.2025.23298.1076
Khosht, A., mosa, S. (2025). 'EFFECT OF DIETARY DIFFERENT RATIOS OF COARSE AND FINE LIMESTONE PARTICLES ON EGG PRODUCTION, EGGSHELL AND BONE QUALITIES AT THE PEAK OF EGG PRODUCTION IN GOLDEN MONTAZAH CHICKEN', Egyptian Poultry Science Journal, (), pp. -. doi: 10.21608/epsj.2025.23298.1076
Khosht, A., mosa, S. EFFECT OF DIETARY DIFFERENT RATIOS OF COARSE AND FINE LIMESTONE PARTICLES ON EGG PRODUCTION, EGGSHELL AND BONE QUALITIES AT THE PEAK OF EGG PRODUCTION IN GOLDEN MONTAZAH CHICKEN. Egyptian Poultry Science Journal, 2025; (): -. doi: 10.21608/epsj.2025.23298.1076

EFFECT OF DIETARY DIFFERENT RATIOS OF COARSE AND FINE LIMESTONE PARTICLES ON EGG PRODUCTION, EGGSHELL AND BONE QUALITIES AT THE PEAK OF EGG PRODUCTION IN GOLDEN MONTAZAH CHICKEN

Articles in Press, Accepted Manuscript, Available Online from 19 May 2025  XML
Document Type: Original Article
DOI: 10.21608/epsj.2025.23298.1076
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Authors
Abeer Rabie Khosht email 1; sahar el sayed mosa2
1Animal Production Research Institute
2Agricultural Engineering Research Institute
Abstract
ABSTRACT
This study investigated the influence of different particle sizes of limestone in Golden Montazah layers diets on egg production, eggshell quality and breaking strength of tibia from 32 to 44 weeks of age. Limestone consisting of fine (F >0.6 mm) and large (L>2.8mm -4.5mm). All hens received a basal diet of the same composition. The differences between the four equal groups were in the replacement percent of fine pulverized limestone by granular limestone, of larger particle size. The first group (control) received the basal diet with only pulverized limestone as a calcium supplement. In the diet of the second group, 60 % of the pulverized limestone was replaced with granular limestone, in the third group percent 80 % and in the last group 100% of fine limestone replaced with large particles of limestone. Significantly higher eggshell breaking force (31.69N), shell weight (5.65 g), and shell thickness (0.46 mm) were found for eggs from the fourth group of hens (29.46 N; 5.33 g ; 0.37 respectively) than for eggs from the control group. Tibia breaking strength was significantly higher (350.66 N) vs. (252.82 N) respectively than those in control group. The results obtained in our investigation showed some possibilities of eggshell quality improvement using limestone of larger particle size as a Ca supplement in the hen diet. Replacing 60-100 % of fine limestone by larger particle size limestone had positive effects on eggshell and tibia bone qualities.
Keywords
Key words: Egg production; eggshell quality; limestone; particle sizes; tibia bone
Main Subjects
Chicken
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