Abstract
In order to estimate the effect of alpha-lipoic acid (LA) supplementation on relieving ammonia stress of broilers, 180 22-day-old male broilers were assigned to three groups, six replicates in each group and 10 birds per replicate. The three groups were: (1) a control group without ammonia stress; (2) exposure to 70ppm atmospheric ammonia (AM); (3) exposure to 70ppm atmospheric ammonia and administration of 300mg/kg LA (AM+LA). The experimental period was 3weeks. Results showed that average daily weight gain was increased and feed conversion ratio was decreased in the AM+LA group, compared with the AM group (P<0.05). Total superoxide dismutase and glutathione peroxidase activities in serum, and glutathione content in liver were higher in the AM+LA group than that in the AM group (P<0.05); however, serum malondialdehyde content was decreased by LA addition (P<0.05). Additionally, serum glutamic-pyruvic transaminase, creatine kinase and lactate dehydrogenase activities were reduced and albumin level was increased by LA addition (P<0.05). In conclusion, LA addition could relieve ammonia stress to restore broiler production performance to normal levels.
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