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\hypersetup{pdftitle={Quantitative Growth Analysis of Cashew Seedlings in the Nursery},pdfauthor={Lateef Hammed, Amudalat Olaniyan, E.O.  Lucas},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Dry matter, Growth rate measurement, Cashew seedlings, Total leaf area},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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\begin{center}
\Large{\textbf{Quantitative Growth Analysis of Cashew Seedlings in the Nursery\footnote{\textbf{Contact Address:} Lateef Hammed, University of Agriculture Abeokuta (UNAAB), Department of Horticulture, 19 Farayola Street Bodija., Ibadan, Nigeria, \mbox{e-mail}: \email{kunlecashew@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Lateef Hammed, Amudalat Olaniyan, E.O.  Lucas}}
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\begin{itemize*}
\item[]{\small{\textit{University of Agriculture Abeokuta (UNAAB), Department of Horticulture, Nigeria}}}
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\index[author]{Hammed, Lateef}
\index[author]{Olaniyan, Amudalat}
\index[author]{Lucas, E.O. }
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
The use of growth analysis technique in elucidating the physiological factors affecting growth of cashew is limited. This has created a serious gap in the cultivation of the crop.



In order to have more insight into the growth of cashew, three nut"=sizes (Jumbo ($>$ 16 g), medium (4 --- 8 g) and madras ($<$ 2 g)) were subjected to detailed growth analysis technique in a non"=shaded nursery at CRIN, Ibadan. The experiment was laid out in completely randomised design with 4 replicates. Two seedlings were randomly selected per nut"=size per replicate making 8 samples for destructive analysis at monthly interval for 12 months. Total leaf area and dry matter per plant were measured, from which leaf area index (LAI), crop growth rate (CGR), net assimilation rate (NAR), leaf area ratio (LAR) and relative growth rate (RGR) were computed.



Results show that leaf area and dry matter of cashew seedlings were linearly related with r$^{2}$ = 0.9. At inception of sampling, seedlings raised from jumbo nut"=size had \mbox{62.4\,\%} and \mbox{375\,\%} dry matter advantages over seedlings raised from medium and madras nut"=sizes respectively.  These advantages reduced to \mbox{1.7\,\%} and \mbox{26.9\,\%} at final sampling period. Total leaf area followed a similar pattern as the dry matter production. The LAI of seedlings raised from jumbo nut"=size was \mbox{91.7\,\%} and \mbox{66.7\,\%} higher than the LAI values of seedlings raised from medium and madras nut"=sizes respectively. The mean CGR of cashew seedling in the nursery was observed to reach peak values at 3, 7 10 and 12 months after sowing (MAS). Cashew seedlings raised from madras nut"=size had highest NAR of \unitfrac[3.88]{g}{m}2/day followed by that of medium and jumbo nut"=sizes with \unitfrac[2.9]{g}{m}2/day and \unitfrac[1.66]{g}{m}2/day in that order. The mean NAR declined with time in the nursery from \unitfrac[2.8]{g}{m}2/day at inception of sampling to \unitfrac[1.02]{g}{m}2/day at final sampling period.



The significance of the results in relation to the performance of cashew transplants on the field is discussed. 



}

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\noindent \textbf{Keywords:} Dry matter, Growth rate measurement, Cashew seedlings, Total leaf area
\index[key]{Growth!rate measurement}
\index[key]{Cashew seedlings}
\index[key]{Total leaf area}
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