Impacts of Phytase and/or Carbohydrases on Performance, Intestinal Organs and Bone Development in Broilers Fed Wheat-Based Diets Containing Different Levels of Phosphorus

The experiment was conducted to study the effects of an enzyme cocktail (CGX) (consist of cellulase, beta-glucanase and xylanase) and/or phytase supplementation to wheat based broiler starter diet on live performance, intestinal organ measurements and bone development. One-day-old male Ross 308 strain broiler chickens (n = 120) were allocated to 8 dietary treatments in a randomized complete block design. The treatments were as follows: Positive control (containing 0.50% Nonphytate Phosphorus (NPP)) (PC), PC + Phytase (150 g ton(-1) feed) (PCP), PC + CGX (100 g ton(-1) feed) (PCR), PC + CGX + phytase (PCRP) and negative control (containing 0.25% NPP) (NC), NC + phytase (150 g ton(-1) feed) (NCP), NC + CGX (100 g ton(-1) feed) (NCR), NC + CGX + Phytase (NCRP). The experiment lasted for 21 days. Birds fed the PC diet exhibited significantly higher Weight Gain (WG) (p<0.001) and improved Feed Conversion Ratio (FCR) (p<0.001). Birds fed the NC diet exhibited significantly (p<0.01) higher duodenum, jejunum, ileum and cecum length. Combining two enzymes significantly (p<0.05) reduced the relative length of duodenum, jejunum, ileum and cecum in NC diets. Nonphytate phosphorus level was significantly affected (p<0.01) tibia length of birds, although enzymes was not influenced statistically to tibia length or width. There was a significant increase (p