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\hypersetup{pdftitle={Dendroclimatic Analysis on Short Rotation Systems from Hainan Island, Pr China},pdfauthor={Torsten Sprenger},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={China, Dendroclimatology, Drought stress, Eucalypt, Hainan, land use optimisation , Pine, Tree growth},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{Dendroclimatic Analysis on Short Rotation Systems from Hainan Island, Pr China\footnote{\textbf{Contact Address:} Torsten Sprenger, University of Göttingen, Göttingen, Germany, \mbox{e-mail}: \email{tspreng@gwdg.de}}\\[0.8ex]}}
\normalsize{\textsc{Torsten Sprenger}}
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\begin{itemize*}
\item[]{\small{\textit{University of Göttingen, Germany}}}
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\index[author]{Sprenger, Torsten}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
The study was carried out in Baisha country on Hainan Island, PR China. The overall aim is to develop a sound information basis for decision support on local short rotation systems (pinus caribiean and eucalypt). As part of the conceptual framework, areas with low biomass production will be identified as potential conversion areas from short rotation systems into close to nature or Multiple Use Forest (MUF) management systems. 







In this presentation a comparison between growth characteristics and local weather data (Dendroclimatic analysis) will be presented as one aspect for the decision support. Therefore beside tree and forest stand characteristics, tree ring samples had been collected from both pine and eucalypts and compared with local climate data. These data have been linked and analysed using geo"=statistical methods (SAS) and are further compared with specialised free available dendroclimatological software. 







The Eucalypt plantation is characterised by relatively short rotation cycles, in this case between five to seven years. This means that weather events like droughts or heavy rainfalls take a significant impact during the plantation live cycle and the expected biomass output. In very dry years the eucalypt trees face a high defoliation rate which typically goes along with growth suppression. This has on the one hand a direct impact on the optimised cutting point and suggests on the other hand that a geographical optimised land use related to the plantation exposition should be possible. In result the climate data are supposed to work out as one of the decision support variables for short rotation forest management, estimating and forecasting biomass output for current eucalypt stands.







Further more in the same area pine plantation have been examined. Beside their biomass production their socioeconomic importance is mainly characterised as Non Timber Forest Products resource (NTFP, mainly pine resin but additional NTFP enrichment plantings) combined with additional forest services. In the situation of drought stress the paper additionally emphasises on the question of their growth reaction on drought events.



}

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\noindent \textbf{Keywords:} China, Dendroclimatology, Drought stress, Eucalypt, Hainan, land use optimisation , Pine, Tree growth
\index[key]{China}
\index[key]{Dendroclimatology}
\index[key]{Drought stress}
\index[key]{Eucalypt}
\index[key]{Hainan}
\index[key]{Land!use optimization }
\index[key]{Pine}
\index[key]{Tree!growth}
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