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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 2001;14(5): 651-654.
DOI: https://doi.org/10.5713/ajas.2001.651    Published online May 1, 2001.
Effect of Feeding Bypass Protein with Urea Treated Jowar Kadbi (Sorghum Straw) on Performance of Cross Bred (HF x DEONI) Calve
V. H. Kalbande, A. H. Chainpure
A study was made of the efficiency of ammonia N retention by Jowar kadbi (sorghum straw), initially 6.41% crude protein (CP), treated with 4% urea solution. After 30 days the CP in straw that was unchaffed and had been left uncovered was 10.02, and in chaffed straw that had been covered with a polythene sheet was 10.9%. The two treated straws were each fed to six crossbred (HF횞Deoni) calves, initially 12 2 months old and 86.7 3.2 kg bodyweight. They were also given two isocaloric (70% TDN) and isonitrogenous (20% CP) concentrate mixtures differing in calculated Rumen Degradable to Undegradable Dietary Protein ratio (RDP:UDP). Those fed the unchaffed uncovered treated straw (treatment C) received 65 RDP:35UDP and the other group (T1) received concentrate with a 55:45 ratio. The T1 group had the higher DM intake (p<0.01) in total (306 vs 268 kg), per day (4.1 vs 3.6 kg) and per unit bodyweight. Digestibility of DM, OM, CP and NDF, but not ADF, was higher in T1 and that group had the higher daily gain (517 vs 333 g) and higher total gain (38.8 vs 25.0 kg) over the 75 d of the feeding trial. It is concluded that chaffing and covering of Jowar kadbi treated with urea, not likely to be adopted by farmers because of financial constraints, does not confer important benefits. A concentrate supplement (estimated 45% of the CP as UDP) to calves given the treated straw has a beneficial effect on their growth and development.
Keywords: By-Pass Protein; Urea Treated Sorghum Straw; Calves

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