Abstract
The 3-day-old broiler type chicks fed the diet added the enzyme mixtures of (A) Pec-tinase+Xylanase or (B) Pectinase+Xylanase+Cellulase for 60 days under the condition con-trolled at 33-19°C (optimum) or 28-14°C (relatively low) in the early stage (0-28 days), and then at 19°C or 14°C in the late stage (29-60 days).
The feed intake and feed efficiency were higher in the group received the diets con-taining either (A) or (B) than in the control groups regardless of temperature conditions. The daily gain of birds fed the diet containing enzymes was 8-21% higher that that of the control one. There was no significant difference between both temperature conditions in daily gain of birds which were fed the diets containing enzymes, but the rate of the gain decrease due to low temperature seemed to be smaller in birds fed the enzyme-containing diet, as compared with the control birds.
