Effects Of Compound Of Phytase, Calcium And Phosphorus On Performance, Nutrient Retention, Tibia Quality And Blood Criteria By Broilers

A study was conducted to determine the effects of different compound of phytase,calcium and avail phosphorus on broilers. Study included feeding and metabolism experiments. Criteria used were performance, nutrient retention, tibia quality and blood criteria.Feeding experiment:270 one-day Avian broiler chickens (chick sexing) were Completely randomly divided into nine groups, each with three replications. The experiment adopted L9(34)orthogonal experimental design consisting of nine groups with three factors and three levels. Treatments of the nine groups involved in different phytase level(0FTU/kg-600FTU/kg-1200FTU/kg),Available phosphorus level (0.18%-0.28%-0.38%) and Calcium level(0.60%-0.80%-1.00%). Level of phytase, Ca and AP were 600 FTU/kg,0.18%,0.65%;600FTU/kg,0.28%,0.80%;600FTU/kg,0.38%,1.00%;0 FTU/kg, 0.18%, 0.80%; 0FTU/kg, 0.28%, 1.00%; 0FTU/kg, 0.38%, 0.65% and 1200FTU/kg, 0.18%, 1.00%, 1200FTU/kg, 0.28%, 0.65%, 1200FTU/kg, 0.38%, 0.80% respectively. The objective of this experiment was to study effects of different phytase, Calcium and phosphorus level for growth performance, mortality and elimination rate, tibia quality, blood criteria, slaughter performance and meat quality in Avian broiler chickens. Because phytase, phosphorus and Calcium were 0FTU/kg, 0.18%, 0.80% respectively, which couldn't make those chickens live till end of experiment. The experiment analyzed data according to single factor block design. The results showed that treat 4(0FTU/kg,0.18%,0.80%) was worst to growth performance of Avian broiler chickens. All broilers of the fourth treatment happened leg weakness, and also were died or eliminated in experimental prior period. Treat 1 (600FTU/kg,0.18%,0.65%) improved growth performance of broiler chickens to a certain degree, but ADG was still worse ,mortality and elimination rate were higher and also content of tibia ash(%) was lower either. Treat 7(1200FTU/kg, 0.18%, 1.00%) decreased significantly appetite and growth performance of broiler chickens, but mortality and elimination rate and leg weakness were still higher, content of tibia ash(%) was lower. So did treat five (0FTU/kg,0.28%,1.00%). Treat 2 (600FTU/kg,0.28%,0.80%) grew better performance, but treat 8 (1200FTU/kg,0.28%,0.65%) didn't further improve growth effects of broilers. Others three treatments with the same level...