Reducing Crude Protein by Supplementing L - Lysine and DL - Methionine in Japanese Quail Rations
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Date
2006
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Publisher
TANUVAS, Chennai
Abstract
An experiment was conducted to study the performance of meat
type Japanese quail on diets with reduced levels of crude protein
supplemented with L-lysine and DL-methionine from day-old to 5 weeks of
age. In the first experiment, the treatment groups consisted of diet with
27 per cent crude protein with 1.3 per cent lysine and 0.48 per cent
methionine as control and 25, 23 and 21 per cent crude protein with
1.3 per cent lysine and 0.48 per cent methionine or 1.5 per cent lysine and
0.56 per cent methionine as test for first two weeks. The best level of
crude protein, lysine and methionine in the starter diet was found out
based on the body weight gain at the end of second week which was used
for feeding the Japanese quail chicks in the second experiment up to two
weeks of age. In the second experiment, the treatment groups consisted of
diet with 24 per cent crude protein with 1.2 per cent lysine and 0.45
per cent methionine as control and 22, 20 and 18 per cent crude protein
with 1.2 per cent lysine and 0.45 per cent methionine or 1.4 per cent lysine
and 0.52 per cent methionine as test for the last three weeks.
There was no significant difference in growth performances viz.
body weight gain, cumulative feed consumption, feed conversion ratio and
livability, between the treatment groups during the both starter and
growing periods. Similarly, the carcass characteristics such as
eviscerated, giblets, ready – to – cook and breast muscle yield percentage
at 5th week of age did not differ between the treatment groups.
The mean per cent moisture content of muscle had no significant
difference between treatment groups. Significantly higher (P<0.01) protein
content of muscle was observed in the group fed 18 per cent crude protein
with 1.2 per cent lysine and 0.45 per cent methionine. Diet with 22 per cent
crude protein with 1.2 per cent lysine and 0.45 per cent methionine
significantly (P<0.01) increased the ether extract content of muscle.
Significantly lowest breast and thigh muscle cholesterol (P<0.01,
P<0.05, respectively) were observed in the group fed 24 per cent crude
protein with 1.2 per cent lysine and 0.45 per cent methionine.
Serum characteristics viz. total protein, albumin, and globulin and
total cholesterol showed no significant difference between treatment
groups.
Net profit over feed cost was highest in the group fed 18 per cent
crude protein with 1.2 per cent lysine and 0.45 per cent methionine
(Rs.6.00).
Description
Keywords
Veterinary Science, Poultry Science