3rd International Poultry Meat Congress

increase in dietary lysine level causes increase in serum total protein level, which is opposite to
the present results.
Serum Urea: Serum urea or blood urea nitrogen is indicator of normal liver function. Liver
converts highly toxic ammonia into less toxic urea and uric acid which is then excreted from
faeces of the birds. Highest value of urea in the birds fed with 3 phase diet suggests that 3 phase
diet is optimum for the normal function of liver and hence normal growth of birds. Similar
finding were reported by Powell et al. (2009) that increase in lysine level caused increase in
serum urea and uric acid.
Conclusion:
So phase feeding is beneficial as compared to 1 phase diet or 2 phase diet. 3-phase diet contains
less lysine level as compared to NRC requirements, so by feeding on less lysine level, better
results can be obtained, when fed with low CP diet. This would result in decrease in feed cost,
which is beneficial for poultry farmers.
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