In part 3, 60 earlylactation
Holstein dairy cows were fed 1 of 3 diets for
a 10-wk period: (1) control (CTL; no enzyme), (2) low
enzyme (CTL treated with 0.5 mL of enzyme/kg of diet
DM), and (3) high enzyme (CTL treated with 1.0 mL of
enzyme/kg of diet DM). Adding enzyme to the diet had
no effect on milk yield, but dry matter intake was lower
for the high enzyme treatment and tended to be lower
for the low enzyme treatment compared with CTL.
Consequently, milk production efficiency (kg of 3.5%
fat-corrected milk/kg of DM intake) linearly increased
with increasing enzyme addition. Cows fed the low and
high enzyme diets were 5.3 (not statistically significant)
and 11.3% more efficient, respectively, compared with
CTL cows. This developmental fibrolytic enzyme additive
has the potential to increase fiber digestibility of
forages, which could lead to greater milk production
efficiency for dairy cows in early lactation.
In part 3, 60 earlylactationHolstein dairy cows were fed 1 of 3 diets fora 10-wk period: (1) control (CTL; no enzyme), (2) lowenzyme (CTL treated with 0.5 mL of enzyme/kg of dietDM), and (3) high enzyme (CTL treated with 1.0 mL ofenzyme/kg of diet DM). Adding enzyme to the diet hadno effect on milk yield, but dry matter intake was lowerfor the high enzyme treatment and tended to be lowerfor the low enzyme treatment compared with CTL.Consequently, milk production efficiency (kg of 3.5%fat-corrected milk/kg of DM intake) linearly increasedwith increasing enzyme addition. Cows fed the low andhigh enzyme diets were 5.3 (not statistically significant)and 11.3% more efficient, respectively, compared withCTL cows. This developmental fibrolytic enzyme additivehas the potential to increase fiber digestibility offorages, which could lead to greater milk productionefficiency for dairy cows in early lactation.
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