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Animal Nutrition and Feed Technology
Year : 2014, Volume : 14, Issue : 3
First page : ( 563) Last page : ( 572)
Print ISSN : 0972-2963. Online ISSN : 0974-181X.
Article DOI : 10.5958/0974-181X.2014.01358.4

Effect of Feeding Sorghum Straw Based Complete Rations with Different Roughage to Concentrate Ratio on Growth and Carcass Characteristics in Nellore Ram Lambs

Venkateswarlu M.*, Reddy Y. Ramana, Nagalakshmi D., Mahender M.1

Department of Animal Nutrition, College of Veterinary Science Sri Venkateswara Veterinary University, Rajendranagar, Hyderabad-500030, India

1Department of Livestock Production and Management

*Corresponding author: malisettyv46@gmail.com

Online published on 18 October, 2014.

Abstract

In order to find out the most suitable ratio of sorghum (Sorghum bicolor) straw: concentrate for optimum growth, production and carcass characteristics in Nellore ram lambs, a study was carried out by feeding sorghum straw based complete rations at the ratio of 70:30 (CR-I), 60:40 (CR-II), 50:50 (CR-III) and 40:60 (CR-IV) for 180d. The ADG was significantly (P<0.05) higher in CR-III and CR-V groups as compared to CR-I and CR-II. The FCR was lower (P<0.01) by 11.87, 16.91 and 22.54 per cent with CR-III, CR-II and CR-I rations, respectively, in comparison to CR-IV ration. The feed cost (H) per kg LW gain was significantly (P<0.01) higher in lambs fed CR-IV followed by CR-III, CR-II and was the lowest in CR-I. The dressing percentage expressed either on live or empty BW basis and per cent of leg, loin, rack, shoulder and neck and fore shank and brisket were similar (P>0.05) among the four groups; however, significant (P<0.01) difference was found among dietary groups in the lean, bone and fat contents of carcasses. Per cent weights of edible and non-edible organs and chemical composition of meat of the four experimental groups did not vary significantly. It is concluded that, inclusion of sorghum straw at 50–60% in the complete diets is considered to be economical in growing lamb's ration.

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Keywords

Carcass characteristics, Complete ration, Feed conversion ratio, Sorghum straw.

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