Performance responses and partitioning of nutrients in steers fed on eigher grass silage or grass silage and concentrate at similar levels of metabolisable energy intake

摘要

It is generally accepted that diets for beef cattle containing a high proportion of grass silage compared to concentrates may result in poorer performance responses (intake, liveweight gain). Scollan et RAID. (1999) reported that in comparison to feeding grass silage alone, supplementing with additional concentrates increased growth rates, but the animals achieved the same amounts of carcass protein hilt depositing more fat. This study examined the effect of feeding a grass silage alone compared to silage and concentrate at the same level of metabolisable energy (ME) intake on animal performance and body composition.