The use of enzymes as additives in broiler chicks diets

Arturo Cortés Cuevas; Rodolfo Águila Salinas; Ernesto Ávila González

2002, Number 1

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Vet Mex 2002; 33 (1)

The use of enzymes as additives in broiler chicks diets

Cortés CA, Águila SR, Ávila GE

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Language: English/Spanish
References: 24
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ABSTRACT

Two experiments were conducted in order to evaluate the use of enzymes (alpha-amylases, xilanases and proteases) as feed additives on the performance of broiler chicken. One thousand Peterson broiler chicks aged 1 day were employed in the first experiment. This study included four treatments: a) Corn + soybean meal control diet, b) Control diet + enzymes, c) Diet 3 % lower in both crude protein (CP) and metabolizable energy (ME), and d) Diet 3 + enzymes. Each treatment had five replicates of 50 chicks each. The second experiment was similar to the first one, but this time sorghum + soybean meal diets were employed. Eight hundred and forty Arbor Acres chicken aged one day were used with seven replicates of 30 chicks per treatment. A completely randomized design with a 2 × 2 factorial arrangement of treatments was used in both experiments. Factors included a level of CP-, ME- and enzymes inclusion. Results of the first experiment for the four treatments at 49 days of age were as follows: weight gain (2 372a, 2 425b, 2 154a and 2 369b g) was different among treatments (P ‹ 0.01) with enzymes addition; feed conversion (2.33a, 2.12b, 2.49 and 2.24b) improved (P ‹ 0.01) with the enzymes addition. In the second experiment, weight gain results (2 393, 2 408, 2 374 and 2 387 g) and breast yield percentage were similar among treatments (P › 0.05). However, feed consumption (5 115a, 5 017b, 5 170a and 5 008b) and feed conversion (2.14a, 2.05b, 2.18a and 2.10b) showed significant improvement with the enzymes addition. Data obtained showed that the enzymes inclusion on corn or sorghum + soybean meal diets for broilers improved weight gain, and/or feed conversion in standard diets, and also in those with lower CP and ME content.

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