EFFECT OF MANNAN OLIGOSACCHARIDES ON GROWTH AND CARCASS TRAITS OF BROILER RABBITS
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Date
2015
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COLLEGE OF VETERINARY AND ANIMAL SCIENCE-MANNUTHY,THRISSUR
Abstract
A study was carried out for a period of four months using eighteen weaned
White Giant broiler rabbits of four to six weeks age to find out the effect of dietary
supplementation of prebiotic mannan oligosaccharides (MOS) on growth
performance and carcass characteristics. The rabbits were divided into three groups
of six animals each. The animals were randomly alloted to three dietary treatments,
T1 (control diet as per NRC 1977), T2 (control diet + 1.5 g MOS per kg diet) and T3
(control diet + 3 g MOS per kg diet) using completely randomized block design. The
data on fortnightly body weight, average daily dry matter intake, average daily gain,
feed conversion efficiency, serum parameters (Ca, P, total protein, plasma cholesterol
and HDL cholesterol ), carcass characteristics ( dressing per cent, meat to bone ratio
and weight of internal organs) and caecal microbial count (TVC and coliform) were
used for evaluation of the work. The cost of production per kg body weight gain was
also calculated.
The results of the study indicate that all the three dietary treatments were
similar (P> 0.05) in various factors such as fortnightly body weight, average daily
gain, average daily DM intake, haematological parameters, carcass traits and feed
cost per kg body weight gain. However the rabbits supplemented with MOS at 1.5g
and 3g per kg diet obtained the better Ca availability (P< 0.01) and weight of heart
was highest for T3 diet and weight of spleen was greater for both T2 and T3 diet.
The animals fed diet supplemented with prebiotic, Bio-Mos showed reduced
incidences of diarrhoea and resulted in better intestinal integrity leading to a
protective effect against common pathogens. The T3 ration supplemented group
obtained significant reduction of coliform count in caecal content and had longer ileal
villi indicating better absorption and better resistance. From the overall results it can
be concluded that the MOS supplementation at 3g per kg diet had better absorptive
power and disease resistance and thus can be used as feed additive in rabbits where
high weaning stress and digestive disorders are common.
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