000			01859nam a2200169Ia 4500
008			220104s9999 xx 000 0 und d
100			_aBabatunde Gabriel M
245		0	_aNutritive value of Nigerian rubber seed (Hevea brasiliensis) meal and oil. IV. Effects of graded levels of rubber seed meal and oil on energy and nitrogen utilizatiion by growing rats
520			_aTwo experiments were conducted to determine the effects of graded levels of rubber seed meal (RBSM) and rubber seed oil (RBSO) on energy, dry matter and nitrogen (N) digestibility, and N retention of growing rats. In the first experiment, RBSM replaced 25, 50, 75 and 100;RBSM substitution was either unsupplemented or supplemented with amounts of DL-methionine and L-lysine calculated to make up their concentrations to the minimum recommended National Research Council levels. In the second experiment, maize oil (MO) and RBSO replaced maize starch at 3, 6 and 9;in a 2 X 3 factorial arrangement treatments. The diets in both experiments were iso-nitrogenous, containing 17;(Experiment 1) and 15;(Experiment 2) crude protein on a fresh weight basis. In Experiment 1, significant reductions were obtained in dry matter, energy and N digestibility, in absolute N retention and in the percentage of digested N retained (P<0.01) as the level of RBSM increased. Supplementation of the 100;RBSM protein diet with methionine and lysine did not reduce the depressions in the digestibility of energy, dry matter and N, but it significantly improved N retention. In Experiment 2, the inclusion of RBSO at the three levels did not affect the digestibility of dry matter, N or energy, or N retention.
650			_aNitrogen utilization
650			_aNutritive value
650			_aRat diet
650			_aRubber seed meal
650			_aRubber seed oil
700			_aPond Wilson G
942			_cBE
999			_c47336 _d47336