01211nam a2200289 a 450000100080000000500110000800800410001902000150006010000160007524501050009126000280019630000110022452004850023565000210072065000110074165000160075265000130076865000150078165000180079665000130081465000090082765000180083665000160085465000220087065000130089270000160090510680132006-09-12       2005    bl uuuu      00u1 u    #d  a08519901341 aPFEFFER, E.  aNitrogen and phosphorus nutrition of cattlebreducing the environmental impact of cattle operations.  aWallingford: CABIc2005  a288 p.  aInteractions between cattle and the environment: a general introduction. Nitrogen requirements of cattle. Nitrogen metabolism in the rumen. Factors affecting the efficiency of nitrogen utilization in the rumen. Whole-animal nitrogen balance in cattle. Phosphorus metabolism in the rumen. Phosphorus metabolism in ruminants and requirements of cattle. Effects of dietary phosphorus and nitrogen on cattle reproduction. Improving the efficiency of nutrient use on cattle operations.  aanimal nutrition  acattle  aenvironment  anitrogen  aphosphorus  aAlimentação  aFósforo  aGado  aMeio Ambiente  aNitrogênio  aNutrição Animal  aPastagem1 aHRISTOV, N.