12 Jul Move to AGP-free feeding with HP AviStart
Replacing part of soybean meal (SBM) with HP AviStart in starter diets, with or without antibiotic growth promoters (AGP) throughout the production cycle, equals the weight of Clostridium perfringens infected birds and their FCR to that of uninfected chickens. Furthermore, uninfected chickens receiving HP AviStart in the starter diets performed equivalent to chickens receiving AGP throughout the rearing cycle, and chickens receiving both performed even better.
Objective
The objective is to assess whether HP AviStart in AGP-free diets improves the performance of Clostridium perfringens infected/uninfected chickens.
Results
• HP AviStart at 5% inclusion rate in starter diets balanced to be iso-nitrogenous on digestible AAs, reduced the diet content of trypsin inhibitor, stachyose + raffinose and beta-conglycinin by 7.1%, 15.5% and 16.4%, respectively, compared to SBM only, while securing AA requirements.
•No significant difference is observed on BWG day 0-42 in uninfected chickens.
• In uninfected chickens, mortality adjusted FCR is significantly improved by 2% by HP AviStart compared to SBM and is equal to that of AGP supplementation (figure 1).
• Among C. perfringens infected chickens, those fed HP AviStart gained 206 g more day 0-42 than those fed SBM (p<0.05), and their performance was equal to that of uninfected chickens (figure 2).
• Mortality adjusted FCR improves by 3% (p<0.05) by feeding C. perfringens infected chickens with HP AviStart compared to only with SBM, and is further improved by feeding HP AviStart + AGP. Furthermore, mortality adjusted FCR of infected chickens fed with HP AviStart is equal to that of uninfected, SBM-fed chickens (figure 3). Healthy Animals – Healthy Business hamletprotein.com Image from Hamlet Protein database. Not specific for this trial.
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