Productivity of Pinus radiata plantations in Spain in response to climate and soil

Romanyà, Joan; Vallejo, V. Ramón

doi:10.1016/j.foreco.2004.02.045

Cited by 54 publications

(47 citation statements)

References 22 publications

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“…Hamel et al (2004) found that growing degree days in Quebec was a significant predictor of site index when used in conjunction with soil properties and biological factors such as lichen cover. Romanya and Vallejo (2004) found that the only climatic variable that was significantly related to Pinus radiata site index in Spain was mean annual temperature (R 2 = 0.34).…”

Section: Discussionmentioning

confidence: 99%

Predicting lodgepole pine site index from climatic parameters in Alberta

Monserud¹,

Huang²,

Yang³

2006

The Forestry Chronicle

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We sought to evaluate the impact of climatic variables on site productivity of lodgepole pine (Pinus contorta var. latifolia Engelm.) for the province of Alberta. Climatic data were obtained from the Alberta Climate Model, which is based on 30-year normals from the provincial weather station network. Mapping methods were based on ANUSPLIN, Hutchinson's thin-plate smoothing spline in four dimensions (latitude, longitude, elevation, climatic variable). Site indices based on stem analysis (observed dominant height at an index age of 50 years at breast height) were used as a measure of forest site productivity. A total of 1145 site index plots were available for lodgepole pine, the major forest species in Alberta. Regression analyses were used to predict site index as a function of climatic variables for each plot. The strongest linear predictors of site index were growing degree days > 5 o (GDD5), the Julian date when GDD5 reaches 100 (D100), and July mean temperature (MTWM). A nonlinear model with D100 as the predictor variable was chosen as the final model. Both the observed and the predicted site indices from the 1145 locations were interpolated using ANUSPLIN and mapped using ArcView. We concluded that climate is an important component of site productivity, accounting for about one quarter of the variation in lodgepole pine site index across the province.

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Section: Discussionmentioning

confidence: 99%

Predicting lodgepole pine site index from climatic parameters in Alberta

Monserud¹,

Huang²,

Yang³

2006

The Forestry Chronicle

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“…In any case, the most humid et al (2002) have studied a 47 set plot of radiata pine plantations in northwest Spain and have not found significant impact of parent material on SI. The importance of parent material in forestry has been pointed out elsewhere and has often been used for classifying site quality in specific areas (Turvey and Poutsma, 1980;Turner and Holmes, 1985;Romanyà and Vallejo, 2004). The soils in the study area are strongly acidic, with high contents of organic matter and high C/N ratios, low effective depth, and low contents of exchangeable base cations and of Mehlich 3 available P (Table 2), in accordance with the properties usually displayed by very acid forest soils in cold, humid areas (Sánchez et al, 2002;Afif and Oliveira, 2006).…”

Section: Resultsmentioning

confidence: 99%

“…Optimum growth of radiata pine occurs at between a mean minimum temperature of 5°C and mean maximum temperature of 20°C, with an optimum mean temperature of 13.2 and 15.5°C for Atlantic and Mediterranean plantations respectively (Romanyà and Vallejo, 2004). The species can grow well in fertile soils, even at moderately low rainfall regimes, with between 750 and 950 mm of mean annual rainfall (Romanyà and Vallejo, 2004). For example, the Spanish foresters from the Mediterranean area sometimes refer to radiata pine as the «dry land poplar» because it can give yields almost as high as Populus sp.…”

Section: Introductionmentioning

confidence: 99%

Relationship among soil parameters, tree nutrition and site index of Pinus radiata D. Don in Asturias, NW Spain

Afif-Khouri¹,

Obregón²,

Prendes³

et al. 2010

For. syst.

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The relationships among soil parameters, tree nutrition and site index were examined in Pinus radiata D. Don stands in a climatically homogeneous area of NW Spain. Thirty-eight even-aged stands, ranging from 10 to 54 years, were sampled. In each stand, a representative plot of 0.1 ha was selected and different stand variables and parent material were considered. The soils in the study area are strongly acidic, with high proportions of organic matter, high C/N ratios, and low exchangeable base cation and available P concentration extracted by Mehlich 3 method (PM3). Although foliar N was sufficient in every stand studied, widespread deficiencies of K, P and, to a lesser extent, Mg and Ca were diagnosed. The foliar concentrations of P were positively correlated with PM3 and effective cation exchange capacity. The SI values ranged between 9.5 and 28.8 m and were positively correlated with foliar P and extractable K in soil. In the stands developed on quartzite and sandstone lithologies, the SI was negatively correlated with slope and foliar N respectively. The results suggest the importance of site selection and fertilizer treatment in reforestation programmes.Key words: age-height relationship, needle analysis, Pinus insignis, soil analysis. Resumen Influencia de los factores edáficos en el índice de sitio y estado nutricional de Pinus radiata D. Don en Asturias, noroeste de EspañaSe estudia en 38 parcelas de 0,1 ha cada una las propiedades del suelo que más influyen en el índice de sitio (IS) de plantaciones de Pinus radiata D. Don de 10 a 54 años de edad y en su estado nutricional en Asturias, considerando diferentes variables de masa y distinto material parental. Los suelos estudiados presentaron un carácter fuertemente ácido, alto contenido de materia orgánica, relación C/N elevada, bajo contenido en bases y P disponible extraído por el método de Mehlich 3 (PM3). Las deficiencias más extendidas fueron en K y P, observándose en algunas parcelas deficiencias en Mg y Ca. Sin embargo, las concentraciones en N fueron siempre superiores al nivel crítico. El P foliar se correlacionó positivamente con la capacidad de intercambio catiónico efectiva y con PM3. El IS osciló entre 9,5 y 28,8 m y estuvo positivamente correlacionado con la concentración de P en acículas y con el K intercambiable en el suelo en todas las parcelas y negativamente con la pendiente y el N foliar en las parcelas desarrolladas sobre cuarcitas y areniscas respectivamente. Los resultados revelan la importancia de la elección del sitio y la necesidad de fertilización en los programas de reforestación.Palabras clave: análisis de acículas, análisis de suelo, pino insigne, relación altura-edad.

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“…Soil Depth (SD) has a great importance on forest functionality and growth in the Mediterranean area (Romanyà & Vallejo, 2004). One of the direct effects of SD concerns the greater or smaller quantity of storable water exploitable by the root (Dezi & Magnani, 2007), so that plant growth is directly influenced by soil water status (Campbell, 1985).…”

Section: Soil Depth (Sd)mentioning

confidence: 99%

An index for the assessment of degraded Mediterranean forest ecosystems

2015

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Aim of study: Diagnosing the degradation degree of forest ecosystems is the basis for restoration strategies. However, there is no literature documenting how to quantify the forest degradation degree by using synthetic indicators, also because there is not a widely accepted definition for "forest degradation" and "degraded forest". Although there are many definitions of forest degradation that converge on the loss of ecosystem services, still today there are no largely accepted methods that give operational guidance to help in defining it. In the present research, with the aim to assess the degree of forest degradation, an integrated index -FDI, Forest Degradation Index -was developed.Area of study: In this first application, the FDI was applied and validated at stand level in two different Mediterranean forest types in two different case studies: Madonie and Nedrodi regional Parks (Sicily, Italy). The first dominated by sessile oak [Quercus petraea (Matt.) Liebl. subsp. austrotyrrhenica Brullo, Guarino & Siracusa], the second dominated by cork oak (Quercus suber L.).Material and methods: FDI is a synthetic index structured starting from representative and relatively easily detectable parameters. Here, we propose a set of six indicators that should be assessed to determine the forest degradation: Structural Index (SI), Canopy Cover (CC), Natural Regeneration Density (NRD), Focal Species of Degradation (FSD), Coarse Woody Debris (CWD), and Soil Depth (SD). FDI, here proposed and discussed, has been based on a MCDA (Multi-Criteria Decision Analysis) approach using the Analytic Hierarchy Process (AHP) technique, and implemented in order to contribute in finding simple indicators useful for forest restoration purposes that have an eco-functional basis.Main results: An integrated index of forest degradation has been defined. FDI values are comprised in the closed interval [0, 10], ranging from class I (Higher ecological functionality) to class IV (Lower ecological functionality). A forest fallen in the FDI-IV class can be defined degraded. In this first application, degradation occurs in SA-4 and in SB-4 where the lowest values (qualitative and quantitative) of the indicators were recorded and the FDI reach the minimum value.Research highlights: FDI has proved to be a useful tool at stand level in identifying a threshold value below which a forest can be termed as 'degraded'. In turn, FDI assumes the meaning of descriptor of the ecological functionality. Future development of the FDI will provide an extension of the application at landscape scale exploiting the potential advantages in coupling MCDA and GIS (Geographical Information Systems) techniques.

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Productivity of Pinus radiata plantations in Spain in response to climate and soil

Cited by 54 publications

References 22 publications

Predicting lodgepole pine site index from climatic parameters in Alberta

Predicting lodgepole pine site index from climatic parameters in Alberta

Relationship among soil parameters, tree nutrition and site index of Pinus radiata D. Don in Asturias, NW Spain

An index for the assessment of degraded Mediterranean forest ecosystems

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