01822naa a2200217 a 450000100080000000500110000800800410001910000220006024500820008226000090016452012120017365000180138565000110140365000200141465000200143465000130145465300140146765300180148165300220149977300830152117861242013-09-27       1958    bl ---       0--  u    #d1 aMcCULLOUGH, M. E.  aA study of techniques for measuring differences in forage quality dairy cows.  c1958  aData from 60 intake, digestibility, grazing behavior and persistency of milk production observations on four typical Georgia pastures have been used to compare the value of various techniques in evaluating pasture changes. Within the data the following observations seem valid: (1) Time spent grazing was unrelated to forage intake and milk production.  (2) Time spent ruminating was determined partially by dry matter intake and digestibility but was also influenced by forage species and the individual cow. (3) Forage intake was influenced significantly by level of milk production and by dry matter digestibility. (4) The correlation between dry matter digestibility and persistency of milk production when expressed as a second degree polynomial was .865. Changes in dry matter digestibility apparently reflect changes not only in nutrient availability but also changes in dry matter intake and ration balance. (5) The techniques employed in this study did not adequately measure all factors affecting animal production on pasture forage. Until techniques are available for measuring all important factors, greater progress should be made with within-forage evaluation than from between-forage studies.  adigestibility  aforage  amilk production  aDigestibilidade  aForragem  aDairy cow  aGado de leite  aProducao de leite  tTechnical Bulletin Georgia Agricultural Experiment Stationgn.4, p.1-22, 1958.