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\hypersetup{pdftitle={Apparent Ileal Digestibility of Crude Protein and Amino Acids in Wheat Offal Diets for Broilers   },pdfauthor={Adebisi Agboola, Temitope Lawal, Eustace Ayemere Iyayi},pdfsubject={Tropentag 2011: Abstract},pdfkeywords={Amino acids, broilers, crude protein, ileal digestibility, wheat offal},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, October 5-7, 2011, Bonn}}\\[1ex] \Large{``Development on the margin''\\[2ex]}}
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\Large{\textbf{Apparent Ileal Digestibility of Crude Protein and Amino Acids in Wheat Offal Diets for Broilers   \footnote{\textbf{Contact Address:} Adebisi Agboola, University of Ibadan, Dept. of Animal Science, No 1 Jericho Quarters Idi- Ishin, 234~Ibadan, Nigeria, \mbox{e-mail}: \email{aadebunmi@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Adebisi Agboola, Temitope Lawal, Eustace Ayemere Iyayi}}
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\begin{itemize*}
\item[]{\small{\textit{University of Ibadan, Dept. of Animal Science, Nigeria}}}
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\index[author]{Agboola, Adebisi}
\index[author]{Lawal, Temitope}
\index[author]{Iyayi, Eustace Ayemere}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Apparent ileal crude protein and amino acid digestibility of wheat offal (WO) at varying levels of inclusion (0, 10, 20, and \mbox{30\,\%}) was determined for broiler chicks in a 7 "= day experiment. The feed ingredient (WO) used served as the sole source of amino acids, as other feed ingredient were fixed. The birds received a commercial broiler starter diets during the first 14 day posthatch. On day 14, birds were sorted by body weight and randomly distributed into 4 dietary treatments in a completely randomised design. Each diet comprised of 4 replicates of 5 birds per each from day 14 to 21 posthatch. On day 21 posthatch, birds were asphyxiated with CO$_{2}$ and digesta samples from the terminal ileum were collected. Titanium dioxide was included as the indigestible dietary marker. The concentration of crude protein increased as the level of WO increased across the diets. In general, the concentration of essential amino acids in wheat offal - based diets, was highest in diet containing \mbox{10\,\%} wheat offal and lowest in diet containing \mbox{30\,\%} WO. The digestibility of all the essential amino acids significantly ($p < 0.05$) decreased as the levels of WO increased across the dietary treatments except for the control diet. Apparent ileal digestibility of crude protein and amino acids in birds on wheat offal diets were improved across the diets. The digestibility of essential amino acids improved significantly ($p < 0.05$) at \mbox{10\,\%} WO inclusion level as compared with other test diets. Threonine digestibility was lowest when compared with digestibility of other essential amino acids across the diets. In conclusion, the data from the present study showed that there were considerable differences in varying levels of WO in the digestibility of their amino acids for broiler starters. Therefore, it is imperative to consider lower levels of WO inclusion, as a level above \mbox{10\,\%} resulted in decreased digestibility of crude protein and amino acids.   }

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\noindent \textbf{Keywords:} Amino acids, broilers, crude protein, ileal digestibility, wheat offal
\index[key]{Amino acids}
\index[key]{Broilers}
\index[key]{Crude protein}
\index[key]{Ileal digestibility}
\index[key]{Wheat!offal}
\end{document}