Pandya, P. R.Arewad, Gajanan Ramrao2018-06-192018-06-192011http://krishikosh.egranth.ac.in/handle/1/5810054161Sixteen crossbred (Holstein Friesian x Kankrej, Jersey x Kankrej and Holstein Friesian x Jersey x Kankrej) calves were selected from the farms of Livestock Research Station, Anand Agricultural University, Anand and were individually fed for 15 days preliminary feeding and 120 days experimental period to meet their energy and protein requirement as per NRG (2001) standards. They were randomly divided into two groups and assigned to two dietary treatments (T1 and T2) on age and body weight basis and were fed compound concentrate mixture based total mixed ration formulated as per BIS Type II standard. Total mixed ration contained compound concentrate mixture and mature pasture hay (Dicanthium annulatum) in the ratio of 50:50. The calves under the control group (TO were given calculated quantity of total mixed ration having concentrate mixture without bypass protein source, whereas, the calves under treatment group (T2) were given calculated quantity of totalmixed ration having concentrate mixture with formaldehyde treated bypass protein source. The initial body weight was 104.50 ± 1.23 and 103.46 ± 2.01 kg in T1 and T2 groups, respectively. The average total gain in body weight was 50.04 ± 0.09 and 61.13 ± 0.17 kg in T1 and T2 groups during the entire experiment, while the respective average daily gain was 421.00 ± 0.01 and 514 ± 0.02 g indicating the daily weight gain was statistically (P<0.05) significant in T2. However, the gain in heart girth of T2 calves was similar with T1 group; Also, the groups did not differ with respect to gain in body length and height.enANIMAL NUTRITIONA STUDYThesis