Journal of Food, Agriculture and Environment

Comparison of the effects of different kinds of NSP enzymes on the performance, water intake, litter moisture and jejunal digesta viscosity of broilers fed barley-based diet

Author(s):

Hassan Shirzadi, Hossein Moravej ^*, Mahmood Shivazad

Recieved Date: 2009-06-11, Accepted Date: 2009-10-09

Abstract:

An experiment was carried out to study the supplementation effect of four different mixed enzymes on the performance, water intake, litter moisture and jejunal digesta viscosity of chicks fed barley compared to those fed barley and the corn diets without enzyme. Addition of enzyme supplementation to the barley-based diet significantly (P<0.05) increased feed intake (FI) during grower period and overall period (only for enzyme C). Body weight (BW) and feed conversion ratio (FCR) were significantly (P<0.05) improved in starter and grower periods by all enzymes. Overall, from 0 to 42 days BW was significantly (P<0.05) increased by enzyme supplementation but only birds that received enzymes B, C and D had similar performance compared with broilers fed on the corn-based diet. Generally, from 0 to 42 d of age, FCR was significantly (P<0.05) decreased when diets containing enzymes were compared to barley-based diet without enzyme, but there were no significant differences among diets containing enzymes A, B and D and the corn-based diet. The carcass weight, carcass yield, and the relative weight of the abdominal fat were significantly (P<0.05) increased by enzyme addition. However, the relative weight of the breast, legs, liver and gizzard as percentage of live weight were not affected by enzyme supplementation. Enzyme supplementation decreased viscosity of jejunal contents of chicks at Day 28, but only enzymes C and D reduced significantly (P<0.05) the viscosity of jejunum compared to barley-based diet without enzyme. In addition, water to feed ratio and litter moisture decreased by addition of all enzymes at 16, 24 and 33 days of age. Addition of all four different enzymes is effective to overcome anti-nutritive effect on broiler performance. In conclusion, there were similar improvements on FCR of birds fed diets with enzyme supplementation, and choice preference of enzyme supplementation should be based on its economic value.

Keywords:

β-glucanase, xylanase, broiler, performance, water intake, litter moisture, viscosity, carcass yield

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 615-619

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