Figure 5.
Changes in the average daily gain (ADG) of broiler chickens by xylanase supplementation among the studies displayed in Table 3 that showed changes in the ADG. The studies were selected from peer-reviewed literature available after 2000. The percentage of change refers to a statistically significant (p < 0.05) and tendency (0.05 ≤ p < 0.10) effects of xylanase individually on the ADG reported from each respective study. The described effects were in comparison with treatments containing no xylanase. The average changes in the ADG of broiler chickens by xylanase supplementation were calculated excluding the studies that showed no effect.
