01618naa a2200241 a 450000100080000000500110000800800410001910000140006024500710007426000090014552010120015465000110116665000110117765000120118865000090120065000140120965300180122365300250124165300080126665300080127470000190128277300750130117854821995-08-10       1977    bl ---       0--  u    #d1 aSMITH, T.  aThe use of poor quality fibrous sources of energy by young cattle.  c1977  aLarge quantities of fibrous food are on hand, one of the most important in the U.K. being barley straw. In low output systems these can form the basis for feeding in high output systems their role will vary with the class of stock being fed. rate of growth appears to be largely unaffected by the source of digested energy. The emphasis should now move away from what cannot be achieved with poor quality forages to what can be acheved with them through improved technical knowledge, by judicious supplementation and food preparation. The output from fibrous foods can be raised by feeding extra protein, grinding, and chemical treatment. Assessments must clearly differentiate beween improved nutritive value and increased output through increased intake. Within the limit of appetite the maximum roughage; concentrate ratio with the level of output desired. Any process which will increase appetite and/or nutritive value will enable a widening of this ratio or permit a higher output from the same ratio.  acattle  aenergy  aEnergia  aGado  aQualidade  aFonte fibrosa  aPoor quality fibrous  aUse  aUso1 aBROSTER, W. H.  tWorld Review of Animal Productiongv.13, n.1, p.49-58, Jan./Mar. 1977.