Impact of exogenous carbohydrases and phytase on growth performance and nutrient digestibility in broilers

H. Lu, S. A. Adedokun, A. Preynat, V. Legrand-Defretin, P. A. Geraert, O. Adeola, K. M. Ajuwon

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The effect of supplementing corn-soybean-based diets with Rovabio® Max AP, an exogenous enzyme mix with carbohydrase (xylanase and β-glucanase) and phytase activities to broiler chickens was evaluated. Male Ross 708 broilers were assigned to four diets: positive control (PC), negative control (NC), deficient in metabolizable energy (ME), crude protein (CP), calcium (Ca) and non-phytate phosphorus (nPP), relative to the PC, by 100 kcal kg-1, 5 g kg-1, 1.1 g kg-1 and 1.6 g kg-1, respectively, in the starter and grower diets; and NC +Rovabio® at 0.05 or 0.075 g kg-1 diet. Starter diets were fed from day 0 to day 21 and grower diets from day 22 to day 42. Body weight (BW) and body weight gain on days 22 and 42 were increased (P <0.05) by enzyme supplementation. Enzyme addition increased (P <0.05) feed intake from day 22 to day 42 and overall (day 0 to day 42). Gain to feed ratio (G:F) was significantly increased (P<0.05) with enzyme supplementation during both starter and grower phases. Enzyme addition increased (P<0.05) serum phosphorus (P) concentration on day 21. On day 42 enzyme supplementation increased (P <0.05) the apparent ileal digestibility of P, dry matter (DM), energy, and N. Addition of a combination of carbohydrases (xylanase and P-glucanase) and phytase to corn-soybean-based diets deficient in ME, CP, Ca and P resulted in a significant increase in growth performance and utilization of P, DM, energy and N in broiler chickens.

Original languageEnglish
Pages (from-to)243-249
Number of pages7
JournalCanadian Journal of Animal Science
Issue number2
StatePublished - Jun 2013


  • Broiler chicken
  • Carbohydrase
  • Nutrient digestibility
  • Phytase

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology


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