The effects of dietary inclusion of yeast culture (YC) and of gradually increasing proportion of
sugar beet molasses [0 (M0), 100 (M100) and 200 (M200) g kg-1] in the concentrate mixture on feed
intake, live weight gain and carcass characteristics of growing Ayrshire bulls were examined in
a 3 x 2 factorial design. Twenty-eight animals with a mean initial liveweight (LW) of 268 kg were used.
Molasses replaced a part of concentrate, which was based on a mixture (1:1) of barley and sugar beet
pulp. Grass silage was offered ad libitum and the concentrate supplements at the rate of 100 g per
LW0.6 on air dry basis. YC (5 g day-1) was top-dressed on the concentrate. Feed intake was not affected
by the treatments but LW gain decreased linearly (P < 0.05) with increasing rate of molasses (1.21,
1.16 and 1.09 kg day-1; SEM 0.029). As the proportion of molasses increased from 0 to 200 g/kg
concentrate the efficiency of feed conversion declined (linear effect P < 0.01) from 6.10 to 6.75 kg DM
kg-1 LW gain. YC had no significant effect either on feed intake (7.26 vs 7.49 kg day-1) or LW gain
(1.14 vs 1.17 kg day-1). Yeast interacted with concentrate so that with M0 LW gain was increased and
with M200 decreased by YC. The differences in carcass weight and carcass gain reflected a pattern
similar to those in LW gain. Dressing proportion and fat grades were not affected by the treatments
but carcass quality grade was better in animals receiving YC.
CITATIONS(2):
1.
Effect of Molasses Supplementation on the Production of Lactating Dairy Cows Fed Diets Based on Alfalfa and Corn Silage G.A. Broderick, W.J. Radloff Journal of Dairy Science
The effect of supplementing highly wilted grass silage with maize silage, fodder beet or molasses on degradation of the diets and the efficiency of microbial protein synthesis in the rumen of sheep Tomaž Žnidaršič, Jože Verbič, Drago Babnik, Špela Velikonja-Bolta Italian Journal of Animal Science
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