2Department of Animal Nutrition, Veterinary College & Research Institute, Namakkal
Department of Animal Nutrition, Madras Veterinary College, Tamilnadu Veterinary and Animal Sciences University, Chennai - 600 007
1E-mail: rameshnutrition@gmail.com
A study was undertaken to evaluate the effect of supplementation of different pure enzyme mixtures on production performance of laying hens. Three types of pure enzyme mixtures (A, B and C) were evaluated biologically in laying hens (23–36 weeks) fed standard layer ration (SR) without (control) and with enzyme mixture A (SR-A), B (SR-B) and C (SR-C) and less dense ration (LR) without (control) and with enzyme mixture A (LR-A), B (LR-B) and C (LR-C). Addition of enzyme was able to achieve extra egg production in LR groups, which was equal to that of SR control. Numerically, higher hen housed egg production was observed in enzyme added SR (85.85, 85.70 and 85.85% in SR-A, SR-B and SR-C respectively) and LR groups (83.35, 83.30 and 82.75% in LR-A, LR-B and LR-C, respectively) over their respective non enzyme group (SR control: 85.10% and LR control:
78.45%). The effect was more pronounced in LR groups. Addition of enzymes resulted in better feed efficiency in both SR and LR groups over their respective control. However, enzyme supplementation did not influence the egg weight, yolk index, yolk color score, albumen index, shape index and egg shell thickness in both SR and LR groups. The feed cost to produce an egg was reduced by 2 paise and 3 paise, respectively in SR and LR enzyme groups compared to control.
NSPs, Enzyme mixture supplementation, Laying hens
