Teak Model: A Process-Based Model of Fast Growing Teak Growth andProduction

ABSTRACT

Information on growth response of fast growing teak to environment is very limited while the interest to grow this kind of teak is high. Conducting some field experiments to get some information about the response of fast growing teak growth to some environmental variability needs much energy, time and money. Teak model is a software of process-based model that can describe the relationship between fast growing teak growth and soil water availability, therefore, it can simulate the teak growth in some water regimes. The model consists of three sub-models, i.e.: phenology, growth, and soil water balance. The phenology sub model is used to simulate the occurance of new leaves and the associated shoots based on thermal unit concept, while the stage of development determines the biomass to different organs. Tree growth is simulated from biomass production using the approach of light use efficiency, respiration and water availability factor. Water balance sub model, to derive the water availability factor, that consists of input (rainfall and irrigation) and the water loss comprising canopy interception, drainage, soil evaporation and transpiration. Water availability factor is calculated from the computed soil moisture. Some of model parameters were obtained from field experiment. To mimic the response of teak growth in some water regimes, the field experiment was conducted in three levels of irrigation, i.e.: without irrigation, irrigation with 7 mm day-1 and irrigation with 14 mm day-1. Resolution of the model is daily time step which can be run to many years assuming the same weather each year. The model calculates the development and growth of individual tree stand. The results show that the calibrated model describes the dynamics of stem height and diameter.



Keywords: Fast growing teak, process-based model, software

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Informasi Detil

Judul Seri

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No. Panggil

//

Penerbit

: boca raton., 2012

Deskripsi Fisik

255-261

Bahasa

English

ISBN/ISSN

978-979-8452-45-1

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subyek

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