Abstract
A study was conducted to determine the effects of diet formulation type on broiler breeder performance of 50 to 64 weeks of age. 336 female and 48 male breeders in eight treatments with six replicates (7 females with a male) were used in the form of a randomized trial design 2×2×2 factorial. Eight experimental diets were formulated based on three factors: first factor included two levels of apparent and true metabolizable energy corrected for nitrogen (AMEn and TMEn) of feed, the second factor included two levels of total amino acids (TAAF) and digestible (DAAF) of feed and the third factor included two levels of broiler breeder hens requirements based on total amino acids (TAAR) and digestible (DAAR). The results show that egg weight was significantly different which was affected by diets formulation based on energy (P<0.05). Diet formulation based on amino acids of feed and requirements had no effect on egg weight (P>0.05). Treatment 3 (AMEn+DAAF+TAAR) was at the best level significantly different in egg weight 68.97 (g), egg production 62.45%, egg mass 43.1 (g/hen/day) and feed conversion ratio 3.59 (P<0.05). Hatching eggs and hatchability was significantly different, which was affected by diet formulation based on energy, amino acids of feed and requirements (P<0.05). This experiment shows that the type of formulation of diets had significant effects on broiler breeder performance. Key words: Broiler breeders, performance, digestible amino acids, fertility.
Highlights
Current recommendation for diet formulation for broiler breeder hens are expressed as daily nutrient intakes based on apparent metabolism energy and total amino acids rather than true metabolism energy and digestible amino acids of feedstuffs
Eight experimental diets were formulated based on three factors: first factor included two levels of apparent and true metabolizable energy corrected for nitrogen (AMEn and TMEn) of feed, the second factor included two levels of total amino acids (TAAF) and digestible (DAAF) of feed and the third factor included two levels of broiler breeder hens requirements based on total amino acids (TAAR) and digestible (DAAR)
Results indicate that the main effects of type of metabolizable energy intake (AMEn, TMEn) had significant effect on egg weight, egg production and egg mass (P
Summary
Current recommendation for diet formulation for broiler breeder hens are expressed as daily nutrient intakes based on apparent metabolism energy and total amino acids rather than true metabolism energy and digestible amino acids of feedstuffs. Energy and amino acids are the most important factors in broiler breeder hen’s diet. Any changes in the daily nutrients intake in broiler breeder hens must be done base on their requirements. Broiler breeder needs nutrition for four important goals which include egg production, growth, maintenance and daily activities. Each of these needs is based on age, body weight, environment temperature and type of feed. Egg production and maintenance require energy and amino acid but the daily activities require only energy (Leeson and Summers, 2000). Knowing the requirements of metabolizable energy in broiler breeder in any age and phase of production and metabolizable energy value of feedstuffs in the diet is essential for their optimal production (NRC, 1994)
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