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Influences of Supplemental Plant Phytase (Phytazyme®) on Performances and Phosphorus Excretion in Laying Hens

사료내 식물성 Phytase (Phytazyme®) 첨가가 산란계의 생산성 및 인 이용성에 미치는 영향

  • Kwon, S.K. (Animal Resources Research Center, Konkuk University) ;
  • Kim, S.K. (Animal Resources Research Center, Konkuk University) ;
  • An, B.K. (Animal Resources Research Center, Konkuk University) ;
  • Yang, U.M. (Animal Resources Research Center, Konkuk University) ;
  • Nam, K.T. (Dairy Extension Service Center, Hankyong National University) ;
  • Kang, C.W. (Animal Resources Research Center, Konkuk University) ;
  • Kang, S.J. (Woogene Co., Ltd)
  • 권순관 (건국대학교 동물자원연구센터) ;
  • 김성권 (건국대학교 동물자원연구센터) ;
  • 안병기 (건국대학교 동물자원연구센터) ;
  • 양운목 (건국대학교 동물자원연구센터) ;
  • 남기택 (국립한경대학교 낙농기술지원센터) ;
  • 강창원 (건국대학교 동물자원연구센터) ;
  • 강석진 (주식회사 우진)
  • Published : 2002.02.28

Abstract

Two experiments were conducted to investigate the effect of dietary supplementation of plant phytase (Phytazyme$^{(R)}$) in corn-soybean meal based diets on utilization of phytase-bound phosphorus in laying hens and evaluate nitrogen(N) digestibility and phosphorus(P) availability in breeders. In the experiment one, three levels of the Phytazyme$^{(R)}$(0.05, 0.1, and 0.2% of diet) were added to diets containing a half of control TCP level(0.96%) for 4 wks. Feed consumption, egg production rate, egg weight and eggshell quality were recorded weekly. At the end of experiment, 8 birds per treatment were sacrificed, liver weight were weighed and right tibiae were removed for determination of P content. The second experiment was conducted to evaluate the P availability and nitrogen digestibility in breeders fed same diets for 2 wks. Feed and excreta were collected to determine the P and N contents for the last three days of experiment two. Addition of Phytazyme$^{(R)}$ resulted in no effects on feed intake, egg product rate, egg weight and egg shell quality. P excretion decreased and its availability enhanced as phytase supplementation increased in diets. Dietary supplementation of Phytazyme$^{(R)}$ above 0.1% level in corn-soybean meal based diets did not have an adverse effect on production and decreased level of phosphorus in excreta.

Keywords

Phytase;Laying hen;Phosphorus availability

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