EVALUATION OF MONO-ENZYME (NUTRASE XYLA) AND MULTI-ENZYMES (NATUZYME AND BIOZYME) SUPPLEMENTATION ON THE PERFORMANCE OF LAYING BIRDS

Résumé

To assess the efficacy of enzyme type, 480 laying birds (ISA Brown; 43 weeks old) were allocated to four treatments (6 replicates, 20birds each) in a completely randomized design. Hens were fed a corngroundnut cake-soybean meal diet over a 6-wk period. The control diet (2,650 kcal/kg ME, 18.5% CP, 0.94% lysine and 0.46% methionine), had a 3.5% greater nutrient density than the enzyme supplemented diets. Enzymes supplemented, following manufacturers instruction, were Nutrase Xyla (endo-xylanase, 100g/ton), Natuzyme (a multi-enzyme, 350g/ton) and Biozyme (a multi-enzyme, 350g/ton). Enzyme supplementation did not influence egg weight, feed intake, feed:egg (g/egg) and metabolizable energy intake (P > 0.05). Egg production (%) and egg mass were higher with multienzyme (P<0.05). however, feed:egg (g/g) was poorer on Biozyme (P < 0.05). Feed cost, per egg was lowest on Biozyme, while per kg egg was lowest with Nutrase-xyla. Natuzyme and Biozyme yielded a higher percentage of extra-large/jumbo eggs than the control group (P<0.05). Enzyme supplementation improved egg production and size, with a greater effect observed with multi-enzymes.
However, enzyme contribution to feed cost will determine choice of enzyme.