Research Article Open Access

Influence of Citric Acid and Microbial Phytase on Growth Performance and Carcass Characteristics of Broiler Chickens

Rouhollah Nourmohammadi1, Seyed Mohammad Hosseini1 and Homayoun Farhangfar1
  • 1 University of Birjand, Iran

Abstract

Problem statement: The aim of this study was to investigated the effects of adding citric acid and microbial phytase supplementation (Natuphos®) on growth performance and carcass characteristics of broiler chickens fed corn soybean meal base diets. Approach: The experiment included nine treatments with 10 birds in each replicate using a 3×3 factorial design for two main factors of citric acid (0, 3 and 6%) and three phytase enzyme (0, 500 and 1000 IU kg−1). The diets were formulated based upon corn-soybean meal 7 to 21 and 22 to 42 day periods. Results: Using different levels of citric acid in diets had no effect on internal organs (except relative heart weight), whereas, diets containing 6% citric acid decreased feed intake, body weight gain and carcass yield (p<0.05) and improved feed conversion ratio and organs relative weight. Also, microbial phytase caused increase in feed intake, weight gain and relative neck weight (p<0.05). Conclusion: Depression of performance was differently affected by citric acid levels. Also, there was an additive effect between microbial phytase and citric acid.

American Journal of Animal and Veterinary Sciences
Volume 5 No. 4, 2010, 282-288

DOI: https://doi.org/10.3844/ajavsp.2010.282.288

Submitted On: 20 December 2010 Published On: 31 December 2010

How to Cite: Nourmohammadi, R., Hosseini, S. M. & Farhangfar, H. (2010). Influence of Citric Acid and Microbial Phytase on Growth Performance and Carcass Characteristics of Broiler Chickens. American Journal of Animal and Veterinary Sciences, 5(4), 282-288. https://doi.org/10.3844/ajavsp.2010.282.288

  • 4,144 Views
  • 5,547 Downloads
  • 7 Citations

Download

Keywords

  • Performance and broiler
  • Microbial Phytase (MP)
  • Citric Acid (CA)
  • Relative Economical Efficiency (REE)
  • Randomized Complete Block Design (RCBD)
  • Body Weight Gain (BWG)
  • Feed Intake (FI)
  • Phosphorus (P)
  • phytase efficiency
  • Economical Efficiency (EE)
  • Analysis Of Variance (ANOVA)