Effect of feeding low-roughage high-concentrate ration with or without sodium bicarbonate on milk production of dairy cows in their early lactation.
1986
Lubbadeh W.F.
15 black and white Friesian cows in three groups were used to study the effect of feeding low-roughage high-concentrate ration with or without NaHCO2 buffer on milk production and milk fat content for the first 8 weeks post-partum. All cows were fed measured amounts of concentrate ration according to their milk yield. Cows were fed 4, 1 and 1 kg alfalfa hay/cow/day for the control, second, and third groups, respectively. Sodium bicarbonate was added at a rate of 1.5% of the concentrate ration fed to the third group. Average daily milk yield per cow was slightly higher for the control group (20.4 kg) compared to the second (17.6 kg) or the third group (18.4 kg). Average daily 4% FCM per cow in the control group (19.7 kg) was significantly higher (P>0.01) than that for the second group (14.9 kg) but not significantly different from that of the third group (17.2 kg). Milk fat percentage dropped significantly (P<0.01) from 3.83% in the control group to 3.08% in the second group. When NaHCO3 was added to the concentrate ration of the third group, milk fat percentage increased significantly (P>0.01) up to 3.62%. Results of this study showed that feeding low-roughage high-concentrate ration to dairy cows in their early lactation caused a significant decrease in their 4% FCM yield and the milk fat percentage, and that the decrease could be stopped by feeding NaHCO3 buffer at a rate of 1.5% of the concentrate ration.
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