Response of cows differing in bloat susceptibility to
intraruminal water and electrolyte loading
V.R. Carruthers
Ruakura Animal Research Station, Ministry of Agriculture and
Fisheries, Hamilton
Proceedings of the New Zealand Society of Animal Production.
1985, 45: 31-34
Changes in rumen digesta and electrolyte composition were
investigated in 4 high (HS) and 4 low (LS) bloat susceptible cows for
7.5 h following intraruminal loading with 10 litres water containing 0
(L), 1.76 (C), 3.52 (H) or 7.04 (HH) moles Na. Pre-treatment Na
concentrations averaged 130 mmol/litre for both susceptibility groups,
with increases averaging -20, 10,42 and 95 mmol/litre after addition of
L, C, H and HH respectively. Susceptibility groups did not differ in
rate of return of Na concentration toward pre-treatment values.
Increasing Na loading decreased fluid loss from the rumen but LS cows
consistently lost more fluid than HS cows, with no treatment-
susceptibility interaction.
Keywords: NZSAPAB;
Bloat; susceptibility; Na; K; inflow; outflow; mechanisms; dairy
cows; digesta amount
Download abstract in text format
Last Updated 03-05-1997
