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Relationship Between the Incidence of Displaced Abomasum and Feeding of Cows in Tokachi District, Hokkaido, Northern Japan

  • Mori, F. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Sawada, K. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Watanabe, K. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Ducusin, R.J.T. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Kumase, N. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Tanabe, S. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Uzuka, Y. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Takahashi, J. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine) ;
  • Sarashina, T. (Department of Veterinary Internal Medicine, Obihiro University of Agriculture and Veterinary Medicine)
  • Received : 2000.06.27
  • Accepted : 2000.09.21
  • Published : 2001.01.01

Abstract

In order to investigate the relationship between the incidence of displaced abomasum and feeding, the actual feeding practices and chemical compositions of roughage were examined in 2 kinds of farms at Tokachi district in Hokkaido. Examination of animal health records revealed that the annual milk yield per cow in high incidence (H-DA) farms was significantly higher than that in low incidence (L-DA) farms. The amount of concentrates fed in H-DA farms tended to be higher than that in L-DA farms during lactation. Compared to L-DA farms, the amount of juicy roughage (corn silage and grass silage) and dry roughage (hay, hay cube and roll wrap silage) during lactation in H-DA farms tended to be higher and lower, respectively. Moreover, the amount of roughage and the ratio of roughage to concentrates in H-DA farms tended to be lower than in L-DA farms. The survey indicated that displaced abomasum was associated with insufficient feeding of dietary fiber and overfeeding of concentrates.

Keywords

Displaced Abomasum;Feeding Management;Lactation;Roughage;Concentrate