DIETARY INCORPORATION OF SPENT BREWERS YEAST FOR GROWTH IN PIGS
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Date
2011
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COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR
Abstract
A feeding experiment was carried out for a period of 95 days on thirty six weaned
cross bred (Large White Yorkshire X Duroc X Desi) piglets to find out the effect of dietary
incorporation of spent brewers yeast on growth. The piglets were divided into three identical
groups having six replicates in each group with two piglets in each replicate. The three
groups were randomly allotted to one of the three dietary treatments T1, T2 and T3 consisting
of standard diets with 0, 2.5 and 5 per cent spent brewers yeast respectively. All the animals
were maintained on their respective dietary regimen from weaning to an average slaughter
weight of 70 kg. Daily dry matter intake, fortnightly body weight, plasma biochemical
parameters at the beginning and end of the experiment, nutrient digestibility, apparent
availability of minerals and slaughter studies were the criteria employed for the evaluation of
the study.
Average initial and final body weight of pigs of T1, T2 and T3 were 15.81 and
73.54, 16.32 and 72.77, 15.63 and 71.77 kg, respectively. Pigs maintained on
different dietary treatments recorded an average daily gain of 607.75, 594.24 and
591.00 g, and an average feed efficiency of2.58, 2.68 and 2.69 respectively for T1, T2
and T3. The experimental pigs attained an early average slaughter weight of 70 kg in
95 days post weaning. Average daily gain, feed efficiency, different plasma
biochemical parameters, digestibility of various nutrients and carcass characteristics
of pigs maintained on three experimental rations were found statistically similar.
There was significant increase in the apparent availability of Mg in T2 and T3
containing spent brewers yeast at 2.5 and 5 per cent compared to control diet without
yeast. Availability of Mn for T3 was lower than T1 and T2 (p<0.05). Significantly
reduced (p<0.05) BUN and total cholesterol were noticed in yeast fed pigs. Cost of
feed per kg body weight gain of pigs was Rs. 40.71, 43.97 and 45.25 respectively for
T1, T2 and T3 and was statistically similar.
From a critical evaluation of the results obtained in the present study, it was
found that there is no significant difference in body weight gain, dry matter intake,
feed conversion efficiency, digestibility of nutrients, various plasma biochemical
parameters and carcass characteristics among the pigs maintained on the three dietary
treatments. On summarizing the over all results of the study, it could be inferred that
spent brewers yeast can be effectively utilized as a protein supplement in pig diet.
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