The effect of processed and unprocessed high swelling Bentonite on broilers performance
2012
Aghashahi , Alireza | Lotfollahian , H | Teymoury, A | Hosseini , A | Mirabdolbaghi ,J | Mansoury , H
This experiment was conducted to evaluate the effects of processed and unprocessed low swelling bentonite on performance of broiler chicks. 180 day-old broiler chicks were used in a completely randomized design with 3 treatments, 6 replicates and 10 chicks per each. The experimental diets were as fallow : 1) Corn-soy bean basal diet (control group), 2) basal diet with 1% low swelling bentonite (lSB), 3) basal diet with 1% processed low swelling bentonite (PLSB). Bentonites were processed by Cupper sulfate. The experimental diets were measured and feed conversion ratio (FCR), mortality and production index were calculated for starter, grower, finisher and total rearing periods. At the end of experiment (day 42) blood samples were taken from two birds of each replicate for serological tests (serum total protein, glucose, albumin, cratinin, uric acid, cholesterol, triglyceride), then, the birds were slaughtered to study carcass yield and relative weights of heart, liver and abdominal fat. PLSB improved energy and protein consumption per daily gain unit(gr) in experimental period (P0.05). Experimental diets have no significant effects on carcass yield and relative weight of heart, gizzard and intestine but reduced mortality rate and improved production index. The relative weight of liver, abdominal fat and gastro intestinal tract were reduced by treatments, significantly (P0.05). Blood concentration of albumin,total protein, cholesterol and cratinin were not affected by treatments, (P0.05). The results indicated that the usage processed low swelling bentonite in diets (10g/kg), decreased the mortality and improved the broiler performance,but the most effect on FCR were obtained by PLSB and LSB in growing period and
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