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\hypersetup{pdftitle={Varying Levels of Dietary Fibre on the Performance of Growing Grasscutter (\textit{Thyronomys swinderianus}) Temmnick },pdfauthor={Olutayo Obi, Adeboye Omole, Olumide Tewe},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Cost/weight gain, feed conversion ratio, fibre requirement, nutrients digestibility},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Varying Levels of Dietary Fibre on the Performance of Growing Grasscutter (\textit{Thyronomys swinderianus}) Temmnick \footnote{\textbf{Contact Address:} Olutayo Obi, Institute of Agricultural Research and Training, Livestock Improvement Programme, Moor Plantation Apata, Ibadan, Nigeria, \mbox{e-mail}: \email{holumydez@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Olutayo Obi$^{1}$, Adeboye Omole$^{1}$, Olumide Tewe$^{2}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$Institute of Agricultural Research and Training, Livestock Improvement Programme, Nigeria}}}
\item[]{\small{\textit{$^{2}$University of Ibadan, Animal Science Department, }}}
\end{itemize*}
\index[author]{Obi, Olutayo}
\index[author]{Omole, Adeboye}
\index[author]{Tewe, Olumide}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{

Grasscutter, a micro"=livestock is being domesticated to enhance the dietary protein needs of Nigerians. Fibre is an essential feed component required for optimal performance. Imbalances in the level of dietary fibre have effect on nutrient digestibility and utilisation.  There is paucity of information on the utilisation of this component in growing grasscutter. Varying levels of dietary fibre on the performance of growing grasscutter were therefore evaluated.







In this study, 36 twelve"=week-old growing grasscutters of mixed sexes and mean weight of 501$\pm$ 3.4\,g and were used . The animals were randomly allotted into four dietary treatments in a completely randomised design, replicated three times with three grasscutters per replicate. Four dietary treatments were formulated to contain \mbox{9\,\%} (C1), \mbox{11\,\%} (C2), \mbox{13\,\%} (C3) and \mbox{15\,\%} (C4) crude fibre. The four pelleted diets contained \mbox{16\,\%} crude protein and 2600 kcal ME\,kg\textsuperscript{-1} dry matter. The experiment lasted 16 weeks. Parameters measured were feed intake and body weight changes. Feed conversion ratio was calculated. Data were analysed using ANOVA and DNMRT at $p < 0.05$.







There were no significant differences observed in feed intake (9419 -- 9469\,g \,$\pm$\,14.1), weight gain (2837 -- 2882 g \,$\pm$\, 61.3), dry matter digestibility(79.3 -- \mbox{79.9\,\%} \,$\pm$\, 4.3), crude protein digestibility (68.4 -- \mbox{69.0\,\%} \,$\pm$\, 3.8) and crude fibre digestibility (61.4 -- 61.9 \% \,$\pm$\, 3.2) of growing grasscutters fed pelletized diets containing 9--\mbox{13\,\%} crude fibre. Feed conversion ratio was, however, significantly lower in the \mbox{13\,\%} crude fibre group (3.24+0.06 $p > 0.05$).  The lowest weight gain was recorded in the \mbox{15\,\%} crude fibre group. The efficiency of feed utilisation, weight gain, feed conversion ratio and cost per unit of gain were best in the diet containing \mbox{13\,\%} crude fibre content.  Nutrients digestibility were better in the diet containing \mbox{13\,\%} crude fibre ($p < 0.05$). Based on the results, diets of growing grasscutter should contain 11 to \mbox{13\,\%} crude fibre. 
}

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\noindent \textbf{Keywords:} Cost/weight gain, feed conversion ratio, fibre requirement, nutrients digestibility
\index[key]{Cost/weight gain}
\index[key]{Feed!conversion ratio}
\index[key]{Fibre requirement}
\index[key]{Nutrients digestibility}
\end{document}