EI-Faham,, A. (2005). EFFECT OF SOME FEED ADDITIVES AND DIETARY PROTEIN LEVELS ON LAYING HENS PERFORMACE. Journal of Animal and Poultry Production, 30(10), 5885-5897. doi: 10.21608/jappmu.2005.238053
A. I. EI-Faham,. "EFFECT OF SOME FEED ADDITIVES AND DIETARY PROTEIN LEVELS ON LAYING HENS PERFORMACE". Journal of Animal and Poultry Production, 30, 10, 2005, 5885-5897. doi: 10.21608/jappmu.2005.238053
EI-Faham,, A. (2005). 'EFFECT OF SOME FEED ADDITIVES AND DIETARY PROTEIN LEVELS ON LAYING HENS PERFORMACE', Journal of Animal and Poultry Production, 30(10), pp. 5885-5897. doi: 10.21608/jappmu.2005.238053
EI-Faham,, A. EFFECT OF SOME FEED ADDITIVES AND DIETARY PROTEIN LEVELS ON LAYING HENS PERFORMACE. Journal of Animal and Poultry Production, 2005; 30(10): 5885-5897. doi: 10.21608/jappmu.2005.238053
EFFECT OF SOME FEED ADDITIVES AND DIETARY PROTEIN LEVELS ON LAYING HENS PERFORMACE
Poultry Prod. Dept. Faculty of Agric., Ain Shams Univ., Cairo, Egypt
Abstract
The aim of this study was to determine the effect of dietary protein levels and supplementation of amino acids, kemzyme and urea on the performance of local laying hens "Mandarah" fed low protein diet. Hens were fed isocaloric diets varying in dietary crude protein being 14 or 16%, respectively. The lower protein diet was fed to hens alone or supplemented with amino acids (methionine + lysine), kemzyme, urea, amino acids + urea, kemzyme + urea or amino acids + kemzyme + urea, to obtained 8 dietary treatments.
During the experimental period, which lasted 30 weeks, 256 layers were distributed equally into 8 dietary treatments (8 treatments x 8 replicates x 4 hens). Results could be summarized as follows:
- Under the condition of the present study, layer hens fed diet containing 16% crude protein significantly improved productive performance (body weight gain, egg production, egg mass and feed conversion ratio) comparable with those hens fed low protein diet (14% crude protein).
- Layer hens fed low protein diet supplemented with amino acids (methionine + lysine) gave significantly better performance than that with other treatments and control. While the addition of kemzyme, urea or the combination without or with amino acids gave significantly lower performance compared with other treatments.
- The egg components (yolk % and albumen % in relation to egg weight) and the chemical composition of egg (protein and fat as percentages on dry matter) was not affected by previous dietary treatments.
- Shell % in relation to egg weight significantly affected by dietary treatments while shell weight, shell surface area and shell weight per unit of surface area were not affected.
- The lowest feeding cost/egg value was demonstrated when layers fed the low protein diet supplemented with amino acids and the value was 10% less than that of layer fed the high protein diet.
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