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©2008 Poultry Science Association, Inc.
Estimation of Nutrient Equivalency Values of
Natuzyme and Its Effects on Broiler
Chick Performance1
M. Zaghari, M. Majdeddin, R. Taherkhani,2 and H. Moravej
Department of Animal Science, University of Karaj
Primary Audience: Nutritionists, Feed Manufacturers, Broiler Producers, Researchers
SUMMARY
Two experiments were carried out to estimate nutrient equivalency of a commercial multienzyme (Natuzyme) and its effects on broiler chick performance. Experiment 1 was carried out using a completely randomized design to evaluate the response of chicks to Natuzyme (with different equivalency values assigned by the producer) in corn-soybean meal-based diets. Dietary treatments 1 and 6 were negative and positive controls, respectively. Diets 2 through 5 were graded levels of nutrient equivalency values of Natuzyme. Each diet was offered to 5 replicates of 16 chicks (n = 480). In experiment 2, a total of 480 male Ross 308 broiler chicks were used in a completely randomized design. Treatment 1 to 4 varied in ME, CP, and nonphytate P content, but in all cases, the ratio between these nutrients remained constant, and treatments 5 to 8 included graded levels of Natuzyme from 0.1 to 0.4 g/kg. Results of experiment 1 show that multi-enzyme supplementation could not restore chick performance to the levels equal to positive control. Equivalency values of Natuzyme for ME, nonphytate P, and CP obtained were 195,180 kcal/kg and 188.45 and 1,170%, respectively.
Key words: nutrient equivalency, multi-enzyme, broiler
2008 J. Appl. Poult. Res. 17:446Ð453
doi:10.3382/japr.2008-00007 |