Sulfur amino acids requirements of laying hens in low protein diets
نویسندگان
چکیده
An experiment was coducted with White Leghorn hens in early laying stage to determine the influence of dietary crude protein (CP) concentration on the requirement for total sulfur amino acids (TSAA).The experiment was conducted for 8 weeks on 600 commerical layer hens, Hy-Line w-36 (six groups of 4 hens, 30 weeks old). This experiment arranged to factorial 5 5 in a complete random design with five levels 13.1, 13.6, 14.1, 14.6 and 15.1% of CP and five levels 0.53, 0.57, 0.61, 0.65 and 0.69% of TSAA. Both CP and TSAA significantly improved feed intake, egg production, egg weight and feed efficiency (p<0.01). But these two factors together had significantly improvement effect just on feed intake and egg weight. So as a result the recommendable levels of CP and TSAA in layer diets to reach the optimum egg weight and feed efficiency, were 14.6% or 15.1% of CP and 0.69% of TSAA. However, higher levels of TSAA in such low protein diets, may have an extra effect on hen`s performance. Also this experiment showed that TSAA levels had the best influence of hen`s performance in lower levels of protein.
منابع مشابه
Response of laying hens to supplementation with various fatty acids when fed diets inadequate in protein and sulphur amino acids
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