Mansuri, M. N.Sejra, Anand R.2018-06-152018-06-151990http://krishikosh.egranth.ac.in/handle/1/5810053201The present study was carried out in Marwari lambs (Weaners) to investigate the pattern of growth and economics of lamb rearing from 3 to 9 months of age, A total of 24 lambs fed on three different levels of concentrate to roughage (T. 50:50, T2 35:65 and T3 20:80) were studied. The treatments significantly (P<0.01) affected the daily dry matter intake per 100 kg body weight(T1 3.10 kg, T2 2.95 kg and T3 2.84 kg) and consequently the average daily weight gain (T1 106.61 g, T2 85.15 g and T3 78.78 g). The overall mean dry matter intake per kg metabolic body weight was 62.34 + 2.29 g. The overall mean digestibility of organic matter, dry matter, crude protein, ether extract and nitrogen free extract declined significantly with Increase in the roughage portion of the ration. The opposite trend was observed in case of crude fibre digestibility. The mean daily digestible crude protein (T1 84.72+5.58 g, T2 52.27+3.18 and T3 30.03±3.97 g) and total digestible nutrients (T1 574.13± 69.67 g, T2 423.34±3.35 g and T3 233.08+16.25 g) intake, and the mean daily balances of nitrogen (T1 13.39±0.64 g, T2 12.32±0.49 g and T3 10.54±0.34 g); calcium (T1 3.99±0.65g, T2 3.02±0.13 g and T3 2.42±0.49 g) and phosphorus T1 1.13±0.22 g, T2 1.03±0.21 g and T3 0.87±0.08 g) were Increased with decrease in roughage ratio.enLIVESTOCK PRODUCTIONA STUDYThesis