Abstract:Exposing Holstein dry cows to short-day (SD) photoperiod of 8 hours per day can improve milk production post-calving by 3.2 kg per day, compared to cows exposed to long-day (LD) photoperiod of 16 hours per day during the same period. To date, no studies have evaluated the effect of altered photoperiod during the dry period on milk production in Jersey cows. Our objective was to study the effect of LD and SD during the dry period on milk production in both breeds. Holstein and Jersey cows (n=33) dried off 60 da… Show more
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