10 important days in the life of a broiler
Why does an efficient starter diet during the first ten days make a difference to broiler performance throughout the production lifecycle? A feeding trial at the University of New England, Australia, has investigated the carry-over effect of HP AviStart from HAMLET PROTEIN on broiler digestive systems.
HP AviStart is a source of highly digestible soy protein that is low in anti-nutritional factors. For the trial, 2.5%, 5% and 10% doses were added to maize and wheat-based starter diets which were then fed to male Ross 308 birds from day one to day ten. The control diets contained no HP AviStart.
a,b – mean values with an a and b superscript in the same row are significantly different (P<0.05)
Table 1 - Performance from day 1-35 of birds fed increasing levels of HP AviStart during starter period (day 1-10) in a maize or wheat-based diet.
Improved carcass yield was calculated from breast, thigh and drumstick measurements. Compared to the control group, birds fed a starter diet with HP AviStart had around 10% more breast and thigh meat and 5% higher drumstick yield. The highest yield was obtained with 5% addition of HP AviStart (table 2).
Figure 1. shows that, in the maize-based diet, the greatest improvement in the ileal digestibility of protein was 10% at an addition level of 2.5% HP AviStart. The maximum improvement in the wheat-based diet was 5%, observed in broilers fed the diet with 5% HP AviStart.
In broilers fed both the maize and wheat-based diets, villus/crypt ratio increased following a starter diet with HP AviStart and was highest at a 5% addition rate. A strong correlation was observed between villus/crypt ratio and breast meat.
Figure 2. Carryover effect at day 24 on villus/crypt ratio after feeding HP AviStart in the starter diet (day 1-10)
These findings support previous studies of the carryover effect of HP AviStart on broiler performance, gut health and protein digestibility. Improved body weight and feed conversion rate alone point to a high return on investment when HP AviStart is added to broiler starter feed.
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Article made possible through the contribution of Katia Pedrosa and HAMLET PROTEIN