effect of two different levels of fiber on feed intake, average daily gain, feed efficiency and ruminal metabolites of holstein calves

this experiment was conducted to determine the effect of feeding alfalfa hay and starter fiber level on feed intake and performance of holstein dairy calves, using thirty two male calves in a completely randomized design assigned to four diets in a 2×2 factorial arrangement. the experimental treatments were as follow: t1: starter with low fiber and without alfalfa hay, t2: starter with low fiber along with alfalfa hay, t3: starter with high fiber and without alfalfa hay and t4: starter with high fiber along with alfalfa hay. results showed feed intake was not significantly different in pre-weaning and throughout the study but after weaning there was significant difference among treatments. average daily gain of calves was not significantly different during pre-weaning period but during post-weaning and throughout the study there was significant difference among treatments for this trait. feed efficiency was not significantly different among treatments in pre-weaning and post-weaning periods but it was significantly different during throughout the study. the results of this experiment showed adding fiber to dairy calves ration through both starter concentrate and alfalfa hay may reduce their performance.