LAYING PERFORMANCE, FAT DIGESTIBILITY AND LIVER CONDITION OF LAYING HENS SUPPLEMENTED WITH VITAMIN B₁₂ OR BIOTIN AND/ OR BILE ACIDS IN DIET.

El-Katcha, Mohamed I.; Soltan, Mosaad A.; El-Naggar, Karima; El-Shobokshy, Set A.; El-Erian, Mohamed A.

For 8 weeks feeding trial, two hundred and seventy, 53 weeks old laying hens were used to investigate the effects of dietary supplementation of vitamin B12 or biotin and/or bile acids on performance, egg quality, fat digestibility and liver composition and histopathology. Birds were randomly divided into 6 groups (three replicates) and fed the experimental diets; group1 (G1) fed on the basal diet without additives as control while G2 and G3 supplemented with 0.02 ppm vitamin B12 and 0.3 mg biotin/kg diet respectively, groups 4-6 fed as the previous detailed design of G1- G3 with the addition of 400 g of dried bile acid (DBA) /tone feed. Biotin supplementation significantly (P12 supplementation alone or with DBA increased average egg production (P12 or biotin addition without or with DBA non-significantly increased blood serum GOT and GPT activities, non-significantly reduced (P≥0.05) fat content of liver tissue (on dry matter or fresh basis) and serum lipid profile parameters except serum HDL concentration, was increased, with no histopathological changes in hepatic tissue. It could be summarized that vitamin B12 supplementation without or with DBA is recommended in layer diet as it gave the best performance, reduced serum lipid profile and improved fat digestibility and the hepatic health.

HENS; DIETARY supplements; BILE acids; BIOTIN; BLOOD lipids; VITAMINS

Slovenian Veterinary Research / Slovenski Veterinarski Zbornik, 2019, Vol 56, p341

1580-4003

Academic Journal

10.26873/SVR-773-2019