دراسة تأثير مستوى البروتين الخام والمثيونين والكولين في الأداء الإنتاجي للفري الياباني ( السمان) تحت الظروف المحلية
This study was carried out at the poultry experimental station, Technical
Institute of Agriculture, Damascus University, Kharbo. 270 of Japanese Quail
birds, one day of age were divided equally into 3 similar groups (90each). Every
group comprised
of 3 replicates of 30 each, each replicates contained 10 cages.
Birds were housed and managed under similar conditions throughout the
experimental period which lasted from the 8 to 22 weeks of age. The birds were
fed on rations recommended by NRC and contained 1, 0.65 or 2 of DLmethionine
g/kg of ration in the first (the control), second and third groups
respectively. Results showed that using ration contained 2g DL-methionine/
1kg of ration gave a significant increase in egg weight, production and
economical efficiency value as compared to the other used rations.
The study was carried out at the experimental station, Faculty of
Agriculture. Damascus University. 1464 of the hybrid Lohman broiler chicks,
one day old, were divided randomly and equally into 8 groups (182 chicks/ G)
with 3 replicates of 61 chic
ks each. Chicks in each replicate were reared
separately on deep litter in an independent room of open housing till the age of
42 days. All housing and management procedures were similar for all chicks
while the feeding was different throughout the fattening period in terms of the
amounts of lysine and methionine added to the mix feed. Chicks of G1, G2, G3
and G4 were fed on plants mixtures supplemented with 1, 1.5, 2 and 2.5 kg/ ton
of methionine, respectively. Chicks in G5, G6, G7 and G8 were fed on the same
mixtures of the previous groups but supplemented additionally with 1kg/ton of
lysine. Result showed that adding lysine 1kg/ton and methionine 2kg/ton to
plant mixtures of feeds of broiler helped in improving significantly most of the
indicators of productivity and this in turn led to a reduction of the cost of
feeding and to produce 1 kg live weight, thereby raising the index profit from
the process of fattening and increasing the gain from fattening process.