Housing systems and type of supplemental vitamin-mineral premix in hens' diets influenced deposition of vitamin in eggs at the late laying phase

摘要

Effects of five different proprietary vitamin-mineral premix (VMP) and two housing systems (HS) on deposition of vitamin B} (thiamine), B6 (pyridoxine), D3 (cholecalciferol), and folic acid in eggs of hens at the late laying stage were investigated. Black Bovan Nera hen strain (n=480) aged 59 weeks were randomly allotted to five dietary treatments; each treatment was replicated six times with eight hens per replicate. The hens were raised in a conventional cage and an open-sided deep litter (DPL) HS.Five isocaloric and isonitrogenous diets were formulated and each was supplemented with 0.25% proprietary VMP 1, 2, 3, 4 and 5 for the hens in cage and DL in 2x5 factorial arrangement and completely randomized design. At age 71 weeks, six randomly selected eggs per treatment (n=60) were processed and assayed for vitamin B,, folate, Br, and D3. Significantly higher (p0.05) content of pyridoxine, folic acid and vitamin D. The HS had significant impact on vitamin D (93.969 111) andfoliate content (51.909 mg/lOOg) of the eggs in the DPL. Effect of interactions of HS x VMP on pyridoxine, folic acid and vitamin D3 deposition in egg were similar (p>0.05) but was significantly higher (p<0.05) for thiamine deposition. Hens from DPL had higher vitamins deposition in egg than cage, while vitamin depositions in eggs were influenced by different the proprietary VMP and HS.