Effect of Urea/Wood Ash-Treated Maize Cobs as Substitute for Maize Grain in Sheep Diet on Intake, Digestibility, Nitrogen Utilization, Rumen NH[sub]3[/sub]-N and pH
Journal Title: Journal of Animal Science Advances - Year 2016, Vol 6, Issue 2
Abstract
An experiment was conducted to determine the effect of urea-wood ash treated maize cobs as substitute for maize grain in sheep diet at Botswana College of Agriculture Content Farm Sebele Gaborone. Chemical composition, intake, digestibility, nitrogen utilization, rumen NH[sub]3[/sub]-N and pH were determined. The urea-wood ash treatments were: T1 (100% urea), T2 (75% urea + 25% wood ash), T3 (50% urea + 50% wood ash), T4 (25% urea + 75% wood ash), T5 (100% wood ash) and T6 (maize grain). The result showed that T6 had the lowest neutral detergent fibre (NDF) and acid detergent fibre (ADF) content and was different (P<0.05) from the rest of the treatments while the NDF and ADF content of the rest treatments were the same (P>0.05). The crude protein CP (%) contents of the diets were 12.53, 11.53, 10.83, 10.05, 9.35 and 12.05 for the T1, T2, T3, T4, T5 and T6 respectively. Crude protein intake (CPI) for all the treatments differed (P<0.05) with T1 having the highest intake followed by T6 while the least CPI was for T5 with 0.062 kg/d. Intake and digestibilities for all the treatments were the same (P>0.05) except for organic matter digestibility. There was a positive nitrogen retention for all the treatments and the rumen NH[sub]3[/sub]-N concentrations for all the treatments were not different (P>0.05). The mean pH values were 6.152, 6.725, 6.733, 6.755, 6.573 and 6.548 for T1, T2, T3, T4, T5 and T6 respectively and were all within the optimum for rumen microbial activities. It was concluded that 50% urea + 50 wood ash treated maize cobs could replace 100% urea-treated maize cobs or maize grain in sheep diet without effect on intake, digestibility, nitrogen utilization, rumen NH[sub]3[/sub]-N and pH.
Authors and Affiliations
A. Abdulazeez , C. M. Tsopito , O. R. Madibela , J. M. Kamau
Keywords
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