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OVERCOMING THE NUTRITIONAL LIMITATIONS OF RICE STRAW FOR RUMINANTS 4. UREA AMMONIA TREATMENT AND SUPPLEMENTATION WITH GLIRICIDIA MACULATA FOR GROWING SAHIWAL BULLS

  • Tharmaraj, J. ;
  • van der Hoek, R. ;
  • Sewalt, V.J.H. ;
  • Schiere, J.B.
  • Received : 1988.10.31
  • Accepted : 1989.03.20
  • Published : 1989.06.01

Abstract

Forty bull calves of Sahiwal crosses were fed either urea treated or untreated rice straw with 4 levels of Gliricidia (0, 1, 2, and 4 kg fresh material). Dry matter intake (DMI) of straw and Gliricidia was measured during 2 periods. Straw intakes in period 1 and 2 were significantly different (P<0.001). Supplementation of Gliricidia depressed the DMI of straw during the second period (P<0.01), but not in the first period. Urea-ammonia treatment increased straw intake and total intake in both periods, but the increase in dry matter digestibility (DMD) of the ration was not significant (P>0.05). Liveweight gain (LWG) was increased significantly, both by urea ammonia treatment (P<0.01) and by supplementation with Gliricidia (P<0.001). Animals on treated straw gained on an average $137\;g{\cdot}d^{-1}$ more than those on untreated straw.

Keywords

Rice Straw;Urea Treatment;Supplementation;Gliricidia;Growing Bulls