Effect of restricting silage feeding prepartum on time of calving, dystocia and stillbirth in Holstein- Friesian cows

摘要

A study was carried out to investigate the effect of restricting silage feeding on time of calving and calving performance in Holstein-Friesian cows. In the treatment group (n=l,248 cows, 12 herds) silage feeding commenced in the evening (17:00 to 20:00h), after a period of restricted access (2 to lOh) while in the control group ad-libitum access to silage was provided over the 24h period (n=l,193 cows, 12 herds). Daytime and nighttime calvings were defined as calvings occurring between the hours of