Chromium chloride and ascorbic acid relieve the consequences of high temperature stress of summer in broiler [electronic resource].

Includes reference.

Seventy–two Hy-line white hens with 32 weeks old were maintained in layer batteries with three decks to the fortieth week of age from July to September where the maximum ambient temperatures was 34 oC ±2. Birds were individually weighed and distributed randomly into four experimental groups of 18 hens with six replicates (cages) of three hens each. The laying hens of each group were fed the basal diet alone as control (group 1) or the basal diet supplemented with 80 mg CrCl3.6H2O (group 2), or with 250 mg vitamin C (group 3) and with the combination of Cr and Vit C (group 4). The basal diet was formulated to contain 18% crude protein and 2800 Kcal ME ⁄ kg of diet. The obtained results showed significant increasing in plasma concentration of T3 hormone by the supplementation with Cr especially when it added together with vitamin C. All supplementations; Cr, vitamin C and their combination increased significantly the plasma concentration of T4 hormone. The same effect could be observed by the supplementation with Cr and became higher when added together with vitamin C on increasing significantly the plasma concentration of insulin.

Summary in Arabic.

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