Parameterisation of 3-PG model for fast-growing Eucalyptus grandis plantations

Almeida, Auro C.; Landsberg, J. J.; Sands, Peter

doi:10.1016/j.foreco.2004.01.029

Cited by 181 publications

(155 citation statements)

References 34 publications

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“…Even though some default parameter values were used, doing so did not cause significant errors in the output [17]. pFS2 and pFS20 values were moderately different from previous studies [7,10,11]. Deciduous broadleaf forests have annual leaf cycles, and biomass is typically stored in stems and branches throughout the year.…”

Section: Discussionmentioning

confidence: 83%

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Application of the 3-PG Model for Gross Primary Productivity Estimation in Deciduous Broadleaf Forests: A Study Area in Japan

Potithep

Yasuoka

2011

Forests

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Abstract:The physiological principles predicting growth (3-PG) model is generally used to estimate gross primary productivity (GPP) in forest plantations. All existing parameter values in the 3-PG model for GPP estimation have been set as the standard values for eucalyptus and pine plantations. We propose that the 3-PG model can be applied to deciduous broadleaf forests dominated by Betula platyphylla via appropriate parameterization of their structure and functions. The allometric relationships between stem biomass and stem diameter, and between foliage biomass and stem biomass, were determined for the biomass partitioning ratio. Additionally, a temperature modifier was considered appropriate because it affected canopy quantum efficiency. After parameterization, the model showed a good correlation between the estimated results and the data from experimental plots in central and northern Japan. At both sites, GPP peaked around August and was 0 during the winter, when the canopy is bare of leaves. Furthermore, a sensitivity analysis was conducted to determine the most influential parameter relative to the output. GPP was sensitive to changes in canopy quantum efficiency and optimum temperature. Among the meteorological data used, solar radiation and temperature had great impacts on GPP, therefore, these parameters should be carefully considered to produce accurate results. OPEN ACCESSForests 2011, 2 591

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Section: Discussionmentioning

confidence: 83%

“…The large differences in a s and n s had strong influences on W F . Almeida et al [11] also reported the effect of a s and n s on W F for E. grandis. Increased n s resulted in increased W F partitioning.…”

Section: Discussionmentioning

confidence: 90%

Application of the 3-PG Model for Gross Primary Productivity Estimation in Deciduous Broadleaf Forests: A Study Area in Japan

Potithep

Yasuoka

2011

Forests

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“…To predict productivity under these conditions, climatic data are essential. Several processbased models, such as 3-PG (Landsberg and Waring, 1997;Coops et al, 1998;Tickle et al, 2001;Sands and Landsberg, 2002;Almeida et al, 2004;Stape et al, 2004), Biomass (McMurtrie et al, 1990), Cabala (Battaglia et al, 2004), and Maestro (Wang and Jarvis, 1990), use climate, soil, and physiological parameters as input variables. Solar radiation is the driver variable for all these models.…”

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confidence: 99%

Estimating Monthly Solar Radiation in South-Central Chile

Álvarez

Mitášová

Allen

2011

Chilean J. Agric. Res.

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Solar radiation is a key component in process-based models. The amount of this energy depends on the location, time of the year, and atmospheric conditions. Several equations and models have been developed for different conditions using historical data from weather station networks or satellite measurements. However, solar radiation estimates are too local since they rely on weather stations or have a resolution that is too coarse when working with satellites. In this study, we estimated monthly global solar radiation for the south-central region of Chile using the r.sun model and validated it with observations from automatic weather stations. We analyzed the performance of global radiation results with the Hargreaves-Samani (HS) and Bristow-Campbell (BC) models. Estimates from a calibrated r.sun model accounted for 89% of the variance (r 2 = 0.89) in monthly mean values for 15 locations in the research area. The model performed very well for a wide area and conditions in Chile when we compared it with the HS and BC models. Our estimates of global solar radiation using the r.sun model could be improved through calibration of ground measurements and more precise cloudiness estimates as they become available. With additional procedures, the r.sun model could be used to provide spatial estimates of daily, weekly, monthly, and yearly solar radiation. oil and climatic conditions in the south-central region of Chile favor the production of numerous crops, including wheat, fruits, and timber. Crop productivity is highly correlated with climatic conditions (solar radiation, amount and distribution of rainfall, and temperature). This area generally has a Mediterranean climate with dry summers. However, climatic conditions can vary dramatically over short distances due to the effects of the Pacific Ocean and the Coastal and Andes Mountains (Díaz et al., 2010). To predict productivity under these conditions, climatic data are essential. Several processbased models, such as

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“…Pela Tabela acima, nota-se que os clones apresentaram altos valores de AFE se comparados com a variação encontrada em eucaliptos nativos (2 a 8 m².kg -1 ) (WHITEHEAD; BEADLE, 2004), e em eucaliptos subtropicais (4 a 7 m².kg -1 ) (WHITE, 1996;MEDHURST;BEADLE, 2002), e sendo similares aos observados em eucaliptos clonais em condições tropicais (7 a 14 m².kg -1 ) ALMEIDA et al, 2004;MARRICHI, 2009 Levando em consideração a estrutura da copa, discutida anteriormente, verificou-se que o clone AEC 1528 apresenta uma delimitação de crescimento da copa na entrelinha de plantio, sendo, portanto, menos eficiente na interceptação da radiação. Essa característica, entretanto, é compensada pela diminuição da AFE.…”

Section: áRea Foliar Específica (Afe)unclassified

Crescimento e eficiência no uso da água por clones de eucalipto sob doses de potássio

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Parameterisation of 3-PG model for fast-growing Eucalyptus grandis plantations

Cited by 181 publications

References 34 publications

Application of the 3-PG Model for Gross Primary Productivity Estimation in Deciduous Broadleaf Forests: A Study Area in Japan

Application of the 3-PG Model for Gross Primary Productivity Estimation in Deciduous Broadleaf Forests: A Study Area in Japan

Estimating Monthly Solar Radiation in South-Central Chile

Crescimento e eficiência no uso da água por clones de eucalipto sob doses de potássio

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