Effects of dietary energy density in the dry period on milk yield and content of Holstein cows

This study was conducted to investigate the effects of energy density in dry period on subsequent milk production. Milk production and milk components of 2143 milking cows were used and NEl of the far-off and close-up period’s diets were 1.35, 1.45, 1.55, and 1.44, 1.54, 1.65 Mcal/kg of dry matter. Descriptive statistics of herds were described. The results were showed as least square and standard error of means in early lactation (120 day) and whole lactation period. As energy density increased in the far-off and close-up periods, there was no difference in milk yield in early lactation period, but there was a linearly increase in whole lactation period (P