Influence of cellulase supplementation on the performance of broilers fed low energy diet
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Date
1997
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Department of Poultry Science, College of Veterinary and Animal Sciences, Mannuthy
Abstract
The effects of different levels of cellulase
supplementation viz., 0.03 and 0.06 per cent in low energy
broiler ration on production performance and nutrient
availability in broiler chicken were evaluated using one
hundred and ninety two commercial one-day old broiler chicks
for a period of eight weeks. The birds were divided into four
dietary treatment groups viz., standard broiler ration (T1),
low energy ration (T2), low energy ration with 0.03 per cent
cellulase (T3) and low energy ration with 0.06 per cent
cellulase (T4). Standard broiler ration was formulated as per
BIS (1992) specification for broiler chicken feed. Inclusion
of wheat bran and deoiled rice bran was made to formulate the
low energy ration. The enzyme supplemented groups showed a
significantly higher body weight than the standard and low
energy diet without enzyme. The feed intake was significantly
higher in the low energy ration without enzyme. A positive
response was observed in feed efficiency by enzyme addition
which was statistically significant. The feed efficiency was
best when the level of enzyme was 0.06 per cent. A
non-significant improvement was noticed in digestibility of
dry matter, protein and ether extract due to enzyme
supplementation. A significantly higher metabolisable energy
and crude fibre digestibility was observed in enzyme added
groups. The enzyme treatment significantly reduced the
moisture content of the excreta. The processing yields and
abdominal fat percentage did not show any significant
difference among treatments. The intestinal viscosity was
significantly lower in birds fed enzyme supplemented diets.
Cost of production of broilers in both the cellulase
supplemented groups was lower when compared with other groups
fed standard control and low energy ration without enzyme.
Based on the above findings, it can be concluded that
cellulase supplementation in low energy diet is beneficial
especially when low energy, less digestible agricultural
by-products are used as feed ingredients in the chicken diet.
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