after the ban of meat and bone meal in 2001, European
poultry producers observed a certain drop in performance.
This may be due to the lack of creatine supply because
vegetable feed ingredients do not contain this semiessential
nutrient. Guanidino acetic acid (GAA), which is
a natural precursor of creatine, was supplemented (0.04,
0.06, 0.08, and 0.12 % of diet in form of CreAMINO®) to
a vegetable diet (negative control). A positive control with
6 % meat and bone meal in feed was also included. 1056
male and 1056 female broilers were each equally distributed
to 48 fl oor pens (eight / treatment) and fed starter
and grower diets. At day 42, three birds per pen were
sacrifi ced for carcass evaluation. Weight gain of female
broilers fed the negative control diets was lower than that
of birds fed the positive control diet (p < 0.05) – for other
performance criteria this eff ect was only numerical. Supplemental
GAA in vegetable diets more than resolved this
eff ect. Analysis of variance revealed that the optimal GAA
supplementation level was somewhere between 0.06 %
(p < 0.05, breast yield – males) and 0.12 % (p < 0.05, feed
conversion – males and breast yield – females). In a few
cases regression analysis was possible suggesting optimum
GAA supplementation levels of 0.05 % (weight gain) and
0.11 % (feed conversion).
after the ban of meat and bone meal in 2001, Europeanpoultry producers observed a certain drop in performance.This may be due to the lack of creatine supply becausevegetable feed ingredients do not contain this semiessentialnutrient. Guanidino acetic acid (GAA), which isa natural precursor of creatine, was supplemented (0.04,0.06, 0.08, and 0.12 % of diet in form of CreAMINO®) toa vegetable diet (negative control). A positive control with6 % meat and bone meal in feed was also included. 1056male and 1056 female broilers were each equally distributedto 48 fl oor pens (eight / treatment) and fed starterand grower diets. At day 42, three birds per pen weresacrifi ced for carcass evaluation. Weight gain of femalebroilers fed the negative control diets was lower than thatof birds fed the positive control diet (p < 0.05) – for otherperformance criteria this eff ect was only numerical. SupplementalGAA in vegetable diets more than resolved thiseff ect. Analysis of variance revealed that the optimal GAAsupplementation level was somewhere between 0.06 %(p < 0.05, breast yield – males) and 0.12 % (p < 0.05, feedconversion – males and breast yield – females). In a fewcases regression analysis was possible suggesting optimumGAA supplementation levels of 0.05 % (weight gain) and0.11 % (feed conversion).
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