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Influence of Corn Steep Liquor on Feeding Value of Urea Treated Wheat Straw in Buffaloes Fed at Restricted Diets

  • Mahr-un-Nisa, Mahr-un-Nisa ;
  • Khan, M. Ajmal ;
  • Sarwar, M. ;
  • Lee, W.S. ;
  • Lee, H.J. ;
  • Ki, K.S. ;
  • Ahn, B.S. ;
  • Kim, H.S.
  • Received : 2005.03.03
  • Accepted : 2006.05.24
  • Published : 2006.11.01

Abstract

Influence of different levels of corn steep liquor (CSL) on chemical composition of urea treated wheat straw (UTWS), ruminal characteristics, digestion kinetics, nitrogen (N) utilization, and nutrient digestibility by ruminally-cannulated buffalo bulls was studied in a $4{\times}4$ Latin Square Design. The CSL was used to ensile 5% UTWS at the rate of 0, 3, 6, and 9% on a dry matter (DM) basis. Total N and neutral detergent fibre (NDF) were increased with increasing level of CSL. Increased NDF content was attributable to increased neutral detergent insoluble nitrogen. Four diets were formulated to contain 20% concentrate and 80% UTWS ensiled with 0, (control), 3 (CSL3), 6 (CSL6), and 9% CSL (CSL9). All diets were mixed daily and fed at 1.5% of body weight twice daily. Ruminal NH3 concentration decreased with level of CSL used to ensile UTWS at 3 and 6 h post prandial, however, at 9 h post parandial it was similar across all diets and at 12 h post prandial was higher with diets containing UTWS ensiled with CSL. Concentrations of total ruminal volatile fatty acid and acetate were increased with the CSL level used to ensile UTWS. Increased rate of disappearance and reduction in lag time of DM and NDF was recorded with diets containing UTWS ensiled with CSL. Dry matter and NDF digestibilities were higher with CSL diets than on the control diet. Buffalo bulls retained more N with diets containing UTWS ensiled with CSL. The present results indicated that UTWS could be ensiled with CSL to improve its nutritive value and N utilization by ruminants.

Keywords

Urea;Corn Steep Liquor;Wheat Straw;Digestibility;Digestion Kinetics;Nitrogen Balance;Buffalo

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