The effect of microbial phytase on apparent digestibility of crude protein, amino acids, minerals and performance of female broiler chickens

پژوهشهای علوم دامی ایران

Article 2, Volume 1, Issue 2, June 2009   

Document Type: Scientific - Research Articles

DOI: 10.22067/ijasr.v1i2.1970

Authors

Ahmad Hassanabadi^{* 1}; Hasan Nasirimoghadam²; Hasan Kermanshahi²; Mohsen Danesh Mesgaran²

¹Department of Animal Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.

²Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad,Mashhad, Iran

Abstract

An experiment was conducted to evaluate the effects of microbial phytase on apparent digestibility of crude protein (CP),
amino acids (AA), and apparent retention of calcium (Ca), total phosphorus (tP), iron (Fe) and zinc (Zn) in female broiler
chickens diet. The experiment was designed as a completely randomized design. Each treatment consisted of 4 replicates of
10 broilers in battery cages, for a total of 240 chicks. The birds were fed similar diets containing six levels of microbial
phytase (0, 250, 500, 750, 1000 and 1250 FTU/kg of diet) during 1-28 days of age. Excreta were quantitatively collected
during 21-24 days of age. The excreta stored at -20ºC, freeze-dried and analyzed for AA, Cp, Ca, tP, Fe and Zn. During the
experiment, body weight gain, feed intake, and feed conversion ratio were measured weekly interval basis. 250 and 500 FTU
phytase significantly improved apparent digestibility of CP and AA (except than alanine, valine and threonine) (P0.05).

Keywords

phytase; digestibility; Amino acid; Crude protein; Minerals; Performance; Broiler