Composition of rumen volatile fatty acids and blood components at pre- and post- partum in healthy, ketonuric and ketotic dairy cows

건강(健康), 케톤뇨증(尿症) 및 케톤증(症) 유우(乳牛)에 있어서 출산전후시(出産前後時) 제(第) 1위내(胃內) 휘발성지방산(揮發性脂肪酸)과 혈액상(血液像)의 변화(變化) 비교관찰(比較觀察)

  • Hamakawa, Masaaki (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Kon, Kazuhiko (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Yoon, Chong-sam (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Sakai, Takeo (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Lee, Won-chang (Department of Veterinary Medicine and Animal Resources Research Center, Kon-Kuk University)
  • Received : 1994.12.09
  • Published : 1995.01.31

Abstract

The effects of diet composition, reproductive condition and ketonuria and ketosis on the composition of rumen volatil fatty acids(VFA) and the blood lipid concentration were investigated in Holstein dairy cows. Six healthy cows(Group I), 9 ketonuric cows (Group II) and 8 ketotic cows(Group III) were examined at days 13-15 pre-partum(PRP) and at day 15 post-partum(POP). The ratios of concentrated feed supplied at PRP and POP were 0% and 15%, respectively, in Group I, 25% and 67% in Group II, and were 30% and 46% in Group III. The fulfillment rates of total digestive nutrient(TDN) and digestive coarse protein(DCP) increased at POP in each group. Although total VFA concentrations were lower at POP than at PRP in each group, the concentrations at PRP and POP were higher in Group I than in Groups II and III. The molar ratio of acetic acid decreased at POP in Group I, while the ratio increased at POP in Groups II and III. The molar ratio of propionic acid increased at POP in Group I, while it decreased in Groups II and III. Blood total cholesterol, free cholesterol, cholesterol esters, HDL-cholesterol, phospholipid and free fatty acid concentrations decreased at POP in all three groups, but these levels were low in Group I, high in Group III and intermediate in Group II at PRP and POP. Triglyceride concentration decreased after parturition in these three groups, but the decrease was most striking conspicuous in Group III.