Effects Of 1,25-Dihydroxyvitamin D3 Supplementation on Performance of 60-Week-Old Layers

The effects of 1,25 dihydroxyvitamin D3 supplementation on egg production, percent hen house, percent hen day, mortality rate and egg size on 60-week-old laying hens were studied. There were 5 treatment groups of layer hens where Treatment 1 served as control supplemented with commercial feed without vitamin D3, Treatment 2 as positive control supplemented with commercial feed and vitamin D3 HyD, which was already used by the poultry farm, Treatment 3 supplemented with commercial feed and Active D at an inclusion rate of 75 ppm per ton of feeds, Treatment 4 supplemented with commercial feed and Active D at an inclusion rate of 90 ppm per ton of feeds and Treatment 5 supplemented with commercial feed and Active D at an inclusion rate of 110 ppm per ton of feeds. A total of 11,027 Lohmann chickens were used for the study. The vitamin D3 were mixed with normal basal diet. The effects of vitamin D3 showed significant results in egg production, percent hen house, percent hen day, mortality rate and egg size. In summary, the vitamin D3 supplementation had increased in laying performance and egg size quality of the old laying hens.