Study of stress decreasing of laying hens in winter at Surin Campus
1993
Tananun Boonwsidh (Rajamangala Inst. of Technology Surin Campus, Surin (Thailand))
As referring to field practice at commercial farm of surin cumpus student, that some farmers decreased stress in summer by using l-lysine and vitamin. These experiments were carried out to investigate effect of l-lysine and vitamin on stress decreasion in winter. Experiment 1 studied of stress decreasion by adding 2 level of l-lysine (150 and 300 g/100 kg) in control ration. One hundred and eighty commercial hens were arranged in CRD. There were 3 treatments, twenty replication in each treatment. Egg productions were collected for 9 weeks. At the end of this study, it was found that control and 150 g l-lysine ration had significantly more egg productions than 300 g lysine ration (p0.05) but control ration had highest profit. Experiment 2 studied of stress decreasion by adding vitamin and l-lysine in control ration. One hundred and eighty commercial hens were arranged in CRD. There were 3 treatments, twenty replication in each treatment. Egg productions were collected for 9 weeks. At the end of this study, it was found that control and l-lysine ration had significantly more egg productions than vitamin ration (p0.01) but control ration had highest profit.
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