Escherichia coli phytase의 첨가가 비육돈의 생산성, 도체특성 및 분 내 구리와 아연 함량에 미치는 영향
Effects of Dietary Escherichia coli Phytase Supplementation on Growth Performance, Carcass Quality and Excretion of Copper and Zinc Concentrations in Finishing Pigs
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This study was conducted to evaluate effects of dietary Escherichia coli phytase supplementation on growth performance, carcass quality and excretion of copper and zinc concentrations in finishing pigs. The total of seventy two [(Landrace×Yorkshire)×Duroc] pigs(65.43±0.72 kg in average initial body weight) were used in 56 days assay. Dietary treatments included 1) CON (basal diet) 2) P5(basal diet+phytase 0.05%) and 3) P10 (basal diet + phytase 0.1%). There were three dietary treatments with six replicate pens per treatment and four pigs per pen. During the overall periods, ADFI(Average daily feed intake) was increased (P<0.05) in phytase supplementation treatments compared to CON treatment. At the 5th week, dry matter, nitrogen and ash digestibilities were higher in P5 treatment than in CON and P10 treatments(P<0.05) and CON treatment showed the lowest effect on nutrition digestibility(P<0.05). However, phosphorus digestibility was higher in both phytase supplementation treatments than in CON treatment(P<0.05). The pH of M. logissimus dorsi was significantly higher in CON treatment than phytase supplementation treatments(P<0.05). L* value of M. logissimus dorsi muscle color was significantly increased(P<0.05) in P10 treatment compared to CON and P5 treatments. Also, a* value was increased (P<0.05) in CON treatment compared with phytase supplementation treatments. However, excretion of copper and zinc concentrations were no significant difference among the treatments. In conclusion, the effect of Escherichia coli phytase showed in ADFI, digestibilities, pH and color of meat in finishing pigs.
Abstract
This study was conducted to evaluate effects of dietary Escherichia coli phytase supplementation on growth performance, carcass quality and excretion of copper and zinc concentrations in finishing pigs. The total of seventy two [(Landrace×Yorkshire)×Duroc] pigs(65.43±0.72 kg in average initial body weight) were used in 56 days assay. Dietary treatments included 1) CON (basal diet) 2) P5(basal diet+phytase 0.05%) and 3) P10 (basal diet + phytase 0.1%). There were three dietary treatments with six replicate pens per treatment and four pigs per pen. During the overall periods, ADFI(Average daily feed intake) was increased (P<0.05) in phytase supplementation treatments compared to CON treatment. At the 5th week, dry matter, nitrogen and ash digestibilities were higher in P5 treatment than in CON and P10 treatments(P<0.05) and CON treatment showed the lowest effect on nutrition digestibility(P<0.05). However, phosphorus digestibility was higher in both phytase supplementation treatments than in CON treatment(P<0.05). The pH of M. logissimus dorsi was significantly higher in CON treatment than phytase supplementation treatments(P<0.05). L* value of M. logissimus dorsi muscle color was significantly increased(P<0.05) in P10 treatment compared to CON and P5 treatments. Also, a* value was increased (P<0.05) in CON treatment compared with phytase supplementation treatments. However, excretion of copper and zinc concentrations were no significant difference among the treatments. In conclusion, the effect of Escherichia coli phytase showed in ADFI, digestibilities, pH and color of meat in finishing pigs.
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