Izlaganje sa skupa
ENERGY LEVEL AND STRATEGY OF FEEDING FOR DAIRY COWS IN THE DRY PERIOD
O. Aaes
; Danish Institute of Animal Science, Research Centre Foulum,Tjele, Denmark
K.L. Ingvartsen
; Danish Institute of Animal Science, Research Centre Foulum,Tjele, Denmark
J.B. Andersen
; Danish Institute of Animal Science, Research Centre Foulum,Tjele, Denmark
Sažetak
The effect of feeding strategy in the dry period on performance and health was investigated in two experiments comprising 80 and 96 dairy cows. In exp. 1 the effect of energy level (Normal and High (1.5 x N) and the effect of a daily ruminal SCFA-burst (+ and -) in the last 4 weeks of the dry period were examined. In exp. 2. only SCFA-burst was included. Sixteen cows were slaughtered for ruminal examination. SCFA-burst was induced by allocating 4.5 kg barley in the morning and roughage in the evening. After calving concentrate was gradually increased to a level of 9 kg DM and grass silage was ad. lib in all groups. The SCFA-burst increased grass silage intake in the first 5 weeks post partum in exp. 1 but not in exp. 2. In exp. I there was an interaction between feeding level and SCFA-burst on milk production, while no difference between treatments were seen in exp. 2. The SCFA bursted cows had a lover incidence of ketose and digestive disorders in the first experiment but not in the second, and there was a tendency to increased activity in the ruminal mucosa but without any macroscopical differences. It is concluded that none or only small benefits are obtained from SCFA- bursts in the dry period on feed intake, performance, health, and reproduction.
Ključne riječi
Hrčak ID:
164564
URI
Datum izdavanja:
20.1.1997.
Posjeta: 566 *