标题：A COMPARISON OF THE EFFECTS OF THE RUMEN FLUIDS OF THE WATER BUFFALO AND HOLSTEIN COW ON THE IN VITRO TRUE DIGESTIBILITY OF SOME LEGUMINOUS HAYS AND GRAMINACEOUS STRAWS
摘要：The aim of this study was to compare the in vitro true digestibility(IVTD) and in vitro NDF di-gestibility (IVNDFD) of some leguminous hays (field pea,common vetch, alfalfa) and graminaceous straws (wheat and rice)in combination with the ru-men fluids collected from water buffaloes or Hol-stein cows as inoculum. Each filter bag, which con-tained one of the five feedblends,buffer solution and rumen fluid, was placed in a Daisy" incubator diges-tion jar. Each feed treatment was replicated8 times and the incubation period was 48 hours. There were significant differences between the effects of the ru-men fluids of the water buffaloes and Holstein cows on some fermentation characteristics of different substrates. The mean TVFA and NH3-N concentra-tions for both ruminant species were significantly higher for leguminous hays than graminaceous straws. These concentrations were not significantly different between rumen fluid applications of water buffalo and Holstein cow for leguminous hays, and the same was true for wheat straw. The rumen fluid of the water buffaloes increased the IVTD and IVNDFD values of the low quality feeds(wheat and rice straw) in comparison to the rumen fluid ofHol-stein cows. This study also demonstrated that legu-minous hays have higher nutritional quality than gra-minaceous straws due to their higher nitrogen and lower fibre contents. Additionally,the results of this experiment suggest that the water buffalo rumen fluid generated higher microbial biomass production when combined with the graminaceous straws than with the rumen fluids of Holstein cows, which was reflected in a higher level of synthesis of VFAs.
关键词：Alfalfa hay;digestibility;field pea hay;common vetch hay;rumen fluid;rice straw;wheat straw
