PROMOTION OF FIRST EGG-LAYING OF LAYING HEN, PROMOTOR FOR FIRST EGG-LAYING AND FEED COMPOSITION FOR IT

摘要

PURPOSE:To promote first egg-laying of laying hen and to keep high egg-laying after that, by feeding 1alpha-hydroxy-and/or 1alpha, 25-dihydroxy-cholecalciferol to it. CONSTITUTION:A promotor for first egg-laying comprising 1alpha-hydroxy-cholecalciferol and/or 1alpha, 25-dihydroxy-cholecalciferol as an active ingredient. 0.01- 2.5mug, preferably 0.15-0.5mug of the active ingredient is daily applied to one laying hen of 70-300 days old by oral medication or injection. A feed composition for laying hen of 70-200 days old or adult hen containing 0.1-25mug, preferably 1.5-5mug of the active ingredient based on 1kg composition may be daily fed to laying hen in the period of 40-200 days old.