Optimization of Biomass Production in Eucalyptus Globulus Plantations. — A Case Study

Pereira, J. S.; Linder, Sune; Araújo, M. C.; Pereira, Helena; Ericsson, Tom; Borralho, N. M. G.; Leal, L. C.

doi:10.1007/978-94-009-2348-5_7

Cited by 75 publications

(59 citation statements)

References 14 publications

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“…Therefore, one practical objective of a forest fertilization regime should be to increase the internal N concentration to realize these significant increases in productivity. Optimal nutrition trials designed to match increasing demand for N during the growing cycle by regular fertilizer additions have increased internal N concentration and demonstrated dramatic increases in growth (Linder 1989, Pereira et al 1989. Similar experiments have not been described for poplars.…”

Section: Nitrogen Productivitymentioning

confidence: 91%

Growth and physiology of aspen supplied with different fertilizer addition rates

Coleman¹,

Dickson²,

Isebrands³

1998

Physiologia Plantarum

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Isebrands, J. G. 1998. Growth and physiology of aspen supplied with different fertilizer addition rates. -Physiol. Plant. 103: 513-526.Variable internal plant nutrient content may confound plant response to environmental stress. Plant nutrient content may be controlled with relative addition rate techniques in solution culture. However, because raising large numbers of plants in flowing solution culture is difficult. we investieated the feasibihtv of raisine slants in soil rnk using relative fertilizer additions. Asp& (Populus tremubides Michi.) clones (216, 259 and 271) planted in pots containing a peat, sand and vermiculite (2:1:1, v/v/v) soil mix were grown with exponentially increasing fertilizer concentrations and harvested periodically to assess growth. Addition rate treatments ranged from 0.01 to 0.05 day-'. The lag phase of growth, in which plants adjusted to the fertilizer regime, lasted 40 days after-which piants entered the-experimental period characterized by constant relative growth rates equivalent to applied fertilizer addition rates. Total plant nutrient concentration was (1) unique for each addition rate, (2) linearly related to addition rate and growth rate, and (3) tended to increase at the highest, and decrease at the lowest addition rates. Regardless, the plants appeared to have attained steady-state conditions. Allocation of carbon to roots increased with lower addition rate treatments and was not denendent unon ontoeenv. There were no treatment differences in growth response among aspen clones. Yet there were treatment differences in leaf chlorophyll and photosynthesis within the clones. For the 0.05 dav-' addition rate treatment. chloronhvll. leaf N concentration and photosynthefic rate were strongly correlated with ohe'another, were at a maximum in recently mature leaves, and rapidly declined with leaf age. The rate of decline in these leaf characteristics was slowest in clone 271, consistent with the leaf longevity stress response reported elsewhere. Plant responses from these relative fertilizer addition trials in soil mix agree closely with those run in hydroponics, indicating that steady-state nutrition can be achieved with a technically simple experimental assemblage.

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Section: Nitrogen Productivitymentioning

confidence: 91%

Growth and physiology of aspen supplied with different fertilizer addition rates

Coleman¹,

Dickson²,

Isebrands³

1998

Physiologia Plantarum

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“…Data were obtained in an experiment with fertilization and irrigation located in the central region of Portugal, 10 km from the Atlantic Ocean, where the climate is Mediterranean with maritime influence (Ribeiro and Lautensach, 1999). This experiment was planted with 3 m × 3 m spacing in March 1986 and consisted of a control and 3 treatments replicated in 2 blocks (Pereira et al, 1989). The treatments were daily irrigation from April to October (I); broadcast application of a pelleted fertilizer twice a year (in March and October) (F); and daily irrigation combined with a simultaneous application of liquid fertilizer once a week during the dry season (FI).…”

Section: Estimation Of Stand Root Biomassmentioning

confidence: 99%

Biomass expansion factors for Eucalyptus globulus stands in Portugal

Soares¹,

Tomé²

2012

For. syst.

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One of several procedures for estimating carbon stocks in forests is the estimation of tree or stand biomass based on forest inventory data. The two approaches normally used to convert field measurements of trees to stand biomass values are allometric biomass equations and biomass expansion factors (BEFs). BEFs are used in published National Forest Inventory results in which biomass is not estimated or as a complement of growth models that do not include biomass predictions. In this paper, the effectiveness of BEFs for estimating total stand biomass in Portuguese Eucalyptus globulus plantations was analyzed. Here, BEF is defined as the ratio of total stand biomass (aboveground biomass plus root biomass) to stand volume with bark. To calculate total biomass, an equation was developed to estimate root biomass as a function of aboveground biomass. Changes of BEF with stand variables were analyzed. Strong relationships were observed between BEF and stand age, stand basal area, stand volume and dominant height. Consequently, an equation to predict BEF as a function of stand variables was fitted, and dominant height was selected as the predictor stand variable. Estimates of total stand biomass based on individual tree allometric equations were compared with estimates obtained with a constant BEF (0.77), used in the Portuguese National Inventory Report on Greenhouse Gases, and with estimates obtained using the dominant height-dependent BEF equation developed in this work. The BEF prediction model proposed in this work may be used to improve E. globulus Portuguese biomass estimates when tree allometric equations cannot be used.Key words: root biomass; aboveground biomass; biomass expansion factors; allometric equations. Resumen Factores de expansión de la biomasa de rodales de Eucalyptus globulus en PortugalEl objetivo es estimar las reservas de carbono en los bosques mediante la comparación de dos métodos: ecuaciones alométricas de biomasa y los factores de expansión de la biomasa (BEF). Las estimaciones de la biomasa total del rodal, basado en las ecuaciones alométricas de árboles individuales se compararon con las estimaciones obtenidas con unos factores de expansión constante de la biomasa (BEF) de 0.77, utilizados en el Informe del Inventario Nacional de Portugal de gases de efecto invernadero, y con las estimaciones obtenidas utilizando la ecuación de altura dominante de BEF desarrollada en este trabajo. En este trabajo se analizó la eficacia de la BEF para estimar la biomasa total del stand en portugués plantaciones de Eucalyptus globulus. Aquí, el BEF se define como el cociente de la biomasa total del stand (biomasa aérea más la biomasa de raíces), situándose el volumen con corteza. Para el cálculo de la biomasa total, se desarrolló una ecuación para estimar la biomasa de raíces en función de la biomasa sobre el suelo. Se analizaron los cambios de BEF con las variables del rodal. Se observó una gran relación entre el BEF y la edad del rodal, el área basal, el volumen y la altura dominante. Por lo tanto, ...

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“…This data set includes 10 and 36 plots respectively from the Quinta do Paço and the Vilar de Luz spacing trials [18], two control plots and two fertilized plots of the fertilized and irrigated trial [12] and 18 permanent plots. Data from felled trees in 10 plots of the Alto do Vilão spacing trial and two permanent plots, described by Pedro [11] and Tomé [20], were also used.…”

Section: Datamentioning

confidence: 99%

A tree crown ratio prediction equation for eucalypt plantations

Soares¹,

Tomé²

2001

Ann. For. Sci.

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-Based on a data set from spacing trials and permanent plots of Eucalyptus globulus Labill., several nonlinear equations for crown ratio prediction (based on exponential, logistic, Richards and Weibull functions) were tested. The total data set was used to fit and select the equations. The equations were evaluated in terms of measures of fit and prediction ability: adjusted-R 2 , residual mean square, sum of PRESS residuals and sum of absolute PRESS residuals. The normality of the studentized residuals was analyzed using normal QQ plots. The presence of heteroscedasticity associated with the error term was checked by plotting the studentized residuals against the predicted values. The significance of the estimated parameters was verified. Model error was characterized in terms of bias and precision. The Richards function was selected. This equation is age and density dependent, reflecting the importance of intertree competition; an initial tree dimension and a measure of stand productivity were also required as explanatory variables.

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Optimization of Biomass Production in Eucalyptus Globulus Plantations. — A Case Study

Cited by 75 publications

References 14 publications

Growth and physiology of aspen supplied with different fertilizer addition rates

Growth and physiology of aspen supplied with different fertilizer addition rates

Biomass expansion factors for Eucalyptus globulus stands in Portugal

A tree crown ratio prediction equation for eucalypt plantations

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