The effect of a zero-grazed perennial ryegrass, perennial ryegrass and white clover, or multispecies forage on the dry matter intake, milk production and nitrogen utilization of dairy cows in mid-late lactation

•Multispecies increased forage intake and milk production of dairy cows.•Urinary N% was 20% lower when cows consumed multispecies.•Cows offered clover forages had a higher N intake and lower N use efficiency.•Perennial ryegrass resulted in the highest milk and N use efficiency.