R. Tapias

R. Tapias
  • Doctor of Engineering
  • University of Huelva

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93
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1,792
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Current institution
University of Huelva

Publications

Publications (93)
Article
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The wood borer Cerambyx welensii Küster is a key contributor to Quercus open woodland (dehesa) decline. Among other factors, olfactory and visual cues could influence host colonisation by this species. In this study, we investigated whether the physiological performance and morphological features of Q. suber trees under summer stress are affected b...
Article
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Featured Application This work could serve as a basis for exploring the potential value of applying remote sensing and geographic information system procedures to elaborate defoliator risk maps based on differences in soft-leaf defoliator activity associated with the relative position of Quercus suber trees within stands, as well as differences tha...
Article
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This work employed a two-step biorefining process, consisting of a hemicellulose-rich liquor production through ultrasound-assisted cold alkaline extraction (CAE), followed by thermochemical treatment of the resultant solid phase. The post-CAE solid phase’s pyrolytic potential was assessed by application of thermogravimetric analysis (TGA) and Frie...
Article
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Sustainable production of lignocellulosic biomass for energy use can contribute to climate change mitigation. This work aims to compare the biomass production of twelve fast-growing woody taxa belonging to the Eucalyptus, Casuarina, Populus and Paulownia genera, the quality of their biomass for energy use and its valorizing through transformation i...
Article
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The use of wood and residual biomass from forestry works is a CO2 emission-neutral source of energy that also contributes to reducing the risk of spreading forest fires, especially under Mediterranean climate. The forest stands of stone pine (Pinus pinea L.) occupies about 0.7 million hectares in the Mediterranean basin. In this study, the commerci...
Article
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Plant communities can undergo drastic changes in their composition if the ecosystem is severely altered by human actions or climate change. These changes endanger any vulnerable species, mainly if it lives in a small area, as is the case of Picris willkommii (Schultz Bip.) Nyman. Therefore, it is essential to know how an ecosystem alteration could...
Article
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Climate change threatens many native species from the Amazon Forest. Among the endangered species is the Açaí (Euterpe oleracea), which is a species with great national and international interest, due to the nutritional benefits and medicinal properties of its fruits. However, there is still no information on the ecophysiological responses of Açaí...
Article
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The steadily increasing demand for energy and concerns about climate change have prompted countries to promote the use of renewable energy sources, including lignocellulosic biomass. In this context, this work aims to assess the biomass production for energy purposes in crops with short rotation, as well as its effect on soil properties. Deciduous...
Article
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Wood-boring insects, such as Cerambyx welensii Küster, are involved in oak decline in Mediterranean areas. To advance our understanding of the olfactory perception of C. welensii, we recorded electroantennographic (EAG) responses from male and female antennae to 32 tree volatile organic compounds typical of emissions from its main Quercus L. hosts,...
Article
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Ante la gravedad del decaimiento y mortalidad de la encina y el alcornoque, que amenazan la sostenibilidad de las masas de Quercus en la Península Ibérica, en 2017 se constituyó el subgrupo “Mejora genética y fisiológica” que forma parte del grupo de trabajo de “seca de los Quercus” coordinado por el MAPA-MITERD. Este subgrupo incluye a científicos...
Article
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En este trabajo se estudió la presencia de insectos defoliadores de hoja tierna (dentro de los órdenes Lepidoptera e Hymenoptera), en una dehesa de Quercus suber en Huelva (TM Almonte), y su relación con los perfiles de emisión foliar de monoterpenos de los árboles. Los muestreos consistieron en vareos semanales (15 golpes por árbol y vareo) entre...
Article
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La incidencia de Cerambyx welensii en Quercus suber es un factor clave en el decaimiento de árboles en las dehesas. Las pautas de selección de hospedantes por C. welensii son poco conocidas; entre otros factores, los volátiles de plantas se consideran claves en la localización de hospedantes en cerambícidos. En el presente trabajo estudiamos alguna...
Article
The use of woody nitrogen-fixing plant species as multipurpose and energy crops aims to enhance biomass yield while improving soil properties. Yet, the effectiveness of this option is still under debate especially the use of short rotation cropping in water and nutrient limited environments. This study investigated whether short rotation coppicing...
Article
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Holm oak (Quercus ilex) is one of the most widely distributed tree species in the Mediterranean basin. High mortality rates have been observed in holm oak populations in the southwest of the Iberian Peninsula as a result of oak decline syndrome. Selection and propagation of genotypes tolerant to this syndrome could aid the restoration of affected a...
Article
This correction stands to correct the original article where a processing error led to the erroneous reference, Lpez-Pantoja et al. 2008. This article is part of the topical collection on Entomological issues during forest diebacks
Article
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Background and Objectives. Water stress is a major constraining factor of Eucalyptus plantations’ growth. Within a genetic improvement program, the selection of genotypes that improve drought resistance would help to improve productivity and to expand plantations. Leaf characteristics, among others, are important factors to consider when evaluating...
Article
Key message Cork oaks highly infested by Cerambyx welensii emit an amount of limonene at dusk, when C. welensii adults become active. In contrast, emissions by neighboring cork oaks free of C. welensii are dominated by pinene-type compounds. Context The activity of the woodborer Cerambyx welensii Küster is a key factor in the decline of Quercus su...
Poster
Full-text available
Eucalyptus species are widely used in productive plantations, but freezing temperatures limit their geographic distribution and reduce crop productivity. Therefore, it is important to understand how nursery fertilisation could affect the frost tolerance and field performance of plants after transplanting. To this end, the effect of two mineral nutr...
Article
Cork oak decline has been a serious problem in Portuguese central and southern areas in the last 30 years. This decline is associated with Phytophthora cinnamomi, a pathogen with a major impact on cork oak decline. A programme aiming the plant selection on resistance, to address the infection of soilborne P. cinnamomi in cork oak woodlands, should...
Article
Lignocellulosic biomass derived from energy crops, a renewable energy source, must be boosted in order to mitigate climate change effects. For this reason, vegetative growth and biomass production of Eucalyptus x urograndis, under a Mediterranean climate, was studied for three years. At the second and the third planting years, 12 treatments were ap...
Article
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Utilizando el test de impacto, ASTM D1037-99, se compara la resistencia de diversas composiciones de fabricación de parquet multicapa de Eucalyptus globulus y Quercus robur, con distintos espesores de capa noble y utilizando para cada uno de ellos tres tipos diferentes de soporte base con el propósito de evaluar la aptitud de Eucalyptus globulus co...
Poster
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O objetivo deste estudo foi comparar clones monoespecíficos e híbridos de Eucalyptus a idade precoce (plantas de viveiro menores de 1 ano de idade) em distintas épocas do ano, mediante avaliação de aspectos relacionados com o consumo de água, da área foliar específica e da taxa de transpiração com estômatos abertos e fechados em condições de labora...
Poster
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El estrés hídrico es uno de los principales limitantes del desarrollo en las plantaciones de Eucalyptus. El objetivo de este trabajo fue evaluar aspectos de la morfología foliar relacionados con el consumo de agua en clones de Eucalyptus procedentes de programas de mejora genética. Se utilizaron cinco clones de E. globulus y cuatro clones de híbrid...
Article
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In the southwest of the Iberian Peninsula, Phytophthora cinnamomi Rands is causing irreversible damage to populations of the two most common species of Quercus, the holm oak (Quercus ilex L.) and the cork oak (Quercus suber L.). Although the symptoms are similar in the two species, the mortality rates are different. We found significant differences...
Conference Paper
Full-text available
En un terreno de suelo franco-arenoso, bajo clima mediterráneo con influencia atlántica, se estudió, durante dos años, la producción de biomasa de un clon de Eucalyptus x urograndis, cultivado a una densidad de 2500 pies ha-1. Partiendo de plantas de un año de edad, de diámetro 63.4  8 mm y altura 4.6  0.5 m, en un diseño factorial completo, se a...
Conference Paper
El uso de fuentes de energía limpia y renovable, como la biomasa lignocelulósica, puede ayudar a paliar el efecto sobre el cambio climático, reducir la contaminación y la dependencia energética, así como ayudar a recuperar terrenos degradados y a potenciar las economías rurales. En este trabajo se realizaron ensayos, durante cuatro años, de cultivo...
Article
The sickle bush (Dichrostachys cinerea (L.) Wight & Arn.) comprises a woody legume shrub which is widely distributed throughout of the tropical areas of Africa, Asia and Oceania, being found as well in Cuba where it represents a difficult to control invasive plant. It holds great silvopasture and energy crop potentials. In southwestern Spain a two...
Article
Prinobius myardi Mulsant is a wood borer implicated in the decline of Mediterranean oaks, especially Quercus suber L. and Quercus ilex L. Plant volatiles play an important role in plant-insect interactions, and electroantennography (EAG) is an effective tool for exploring the electrophysiological activity of host plant volatiles on insects. To impr...
Conference Paper
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El déficit energético en la Unión Europea, las emisiones de contaminantes y CO2 por el consumo de combustibles fósiles, el abandono de terrenos agrícolas marginales y el despoblamiento rural pueden dar un nuevo impulso al cultivo de biomasa lignocelulósica para su uso como fuente de energía renovable. No obstante, las limitaciones hídricas del ambi...
Conference Paper
Full-text available
El déficit energético en la Unión Europea, las emisiones de contaminantes y CO2 por el consumo de combustibles fósiles, el abandono de terrenos agrícolas marginales y el despoblamiento rural pueden dar un nuevo impulso al cultivo de biomasa lignocelulósica para su uso como fuente de energía renovable. No obstante, las particularidades edafoclimátic...
Article
Full-text available
Al iniciar la recuperación de la raza mallorquina se vislumbró de una manera clara que su única funcionalidad era el pastoreo extensivo y que el nicho en donde se debía ubicar a la raza era en donde había estado hasta ahora, en el medio natural de Mallorca ; siendo una herramienta indispensable, mediante la silvopascicultura, en la prevención de in...
Conference Paper
Full-text available
Leucaena leucocephala and L. diversifolia produced high biomass with regrowths of a year, 30-35 (max. 50) TDM ha-1 yr-1. After 10 years of study and up to 6 short ,in some cases, the plants continue to show vigorous regrowth and soil have evolved favourably in N, OM and enzymatic activities. However, it would be necessary phosphorus fertilization t...
Article
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Eucalyptus globulus Labill. es una especie ampliamente utilizada en plantaciones comerciales y adaptada a vivir sobre suelos pobres y bajo clima mediterráneo. Durante 32 meses se estudió la evolución del crecimiento diametral diario de cuatro clones de la especie, tres de ellos de la generación de mejora F1 (C, O, T) y un clon de referencia de la F...
Article
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Forest restoration programs using Holm oak (Quercus ilex ssp. ballota [Desf.] Samp.) have had limited success. The effect of plant provenance on plantation success is uncertain, although some previous studies suggest that some provenances may be better able to tolerate stress. We studied the tolerance to drought in seedlings from two Spanish proven...
Conference Paper
Forest restoration programs using Holm oak have enjoyed only limited success. The vulnerability to stress and the low plant quality seem to be the main factors that limit plantation success. In addition the effect of using inappropriate provenances in plantation success is still unknown and previous studies about phenotypic plasticity in this speci...
Article
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In order to identify fast growing species utilizable for olygomer and monomer production, five fast growing species (Paulownia fortunei, Chamaecytisus proliferus, Arundo donax, Leucaena.diversifolia and Sesbania grandiflora) were tested. Concurrently, the biomass productivity of these species was also tested on a field scale. The biomass producti...
Article
Pulping and papermaking of Leucaena diversifolia by soda-anthraquinone-ethanol was studied using an experimental design in order to investigate the effects of cooking variables: temperature, time, soda concentration, ethanol concentration and wash-disintegrate temperature on the pulp yield and the physico-chemical characteristics of paper sheets (t...
Article
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The knowledge of the cycle of nutrients is fundamental for the correct comprehension of the tree–soil relationship and for an adequate forest management. In order to analyse the nutrients return from leaves and litterfall in a Mediterranean cork oak forest in southwestern Spain, 12 trees were randomly selected and litterfall collected for 2years. S...
Article
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Este artículo presenta un estudio sobre la biodiversidad y el estado de ocho Zonas de Alto valor de Conservación en la provincia de Huelva (localizada en el suroeste de la Península Ibérica), colindantes a plantaciones de especies de crecimiento rápido (Eucalyptus globulus). El estudio se incluye en el marco de un proceso de certificación forestal....
Article
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Eucalyptus globulus Labill. es una especie ampliamente utilizada en plantaciones para producción de madera. Está adaptada a vivir sobre suelos pobres y bajo clima mediterráneo pero suave y con influencia oceánica. Soporta cierto grado de estrés hídrico pero le van mal temperaturas extremas que sobrepasen 40 ºC ó -5 ºC. Su cultivo en la provincia de...
Article
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Intraspecific variability of EAG responses in Cerambyx welensii has been studied. We have not found significant differences of EAG responses neither between sexes nor types of solvent, paraffin oil and hexane, but there was a highly significant variability of responses between individuals (0,92 mV± 0,6. Mean ± DT) to (E)-2-hexenal (50% v/v). More t...
Article
Full-text available
Acorn production patterns and the annual evolution of water relations parameters of Quercus ilex ssp. ballota (Desf.) Samp. in a dehesa (an open woodland forest) subject to various soil treatments (ploughing, ploughing+sowing, control) were studied in southwest Spain from June 2006 to December 2008. The effects of soil water holding capacity and ef...
Article
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En este trabajo se estudia la variabilidad intraespecífica de la respuesta electrantenográfica de Cerambyx welensii. No se han encontrado diferencias de respuestas entre sexos, ni entre el tipo de solvente empleado, hexano o aceite de parafina; pero sí se encontró variabilidad entre individuos (0,92 mV ± 0,6. Media ± DT) frente al (E)-2-hexenal (50...
Article
Full-text available
Forestry plantations with evergreen broadleaf species in Mediterranean climate sites usually perform poorly in the field. Holm oak (Quercus ilex ssp. ballota (Desf.) Samp.), cork oak (Quercus suber L.), wild olive tree (Olea europaea L. ssp. europaea var. sylvestris) and lentisk tree (Pistacia lentiscus L.) are extensively used for such plantations...
Article
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Se describió la evolución anual del estado hídrico y la producción de bellota de Quercus ilex ssp. ballota en una parcela de la provincia de Huelva, suroeste de España, en relación a distintos tratamientos de suelo. Para ello se obtuvieron parámetros hídricos derivados de curvas presión-volumen y transpiración cuticular. Junto a ello se describió l...
Article
A central composite experimental design was used to investigate the influence of environmental composting parameters (moisture, aeration, particle size and time) for legume trimming residues, used on soil restoration, on the properties of products obtained (organic matter, Kjeldahl-N, C/N ratio and nitrogen losses (N-losses)) in order to determine...
Article
In order to identify faster-growing non-woody species usable for biomass and paper production, four Leucaena species (L.diversifolia, L. colinsii, L. salvadorensis and three varieties of L. leucocephala) were tested. All the Leucaena species showed a good soil and climatic adaptation to Spain Southwest except for L. salvadorensis. Studied Leucaena...
Article
In order to identify faster-growing non-woody species usable for biomass and paper production, four Tagasastes (Chamaecytisus proliferus) from different origins are tested. All the Tagasaste species (T. Huelva, T. Australia, T. New Zealand and T. La Palma island) show a good soil and climatic adaptation to Southwest Spain. The studied Tagasaste pro...
Article
Full-text available
Acorn production by Quercus ilex L. ssp. ballota (Desf.) Samp. in SW Spain was assessed, and variations between years and the influence of pruning on it were examined. To this end, an experimental study was conducted at two different sites (Calañas and San Bartolomé, in the province of Huelva) where trees were subjected to traditional (light, moder...
Article
Full-text available
El conocimiento del ciclo de nutrientes y el desfronde en los ecosistemas es fundamental para el correcto entendimiento de las relaciones árbol-suelo. En ecosistemas mediterráneos los recursos agua y nutrientes son muy limitantes, por lo que un buen conocimiento de aspectos como los estudiados proporcionaría herramientas útiles para la correcta ges...
Article
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En este artículo se analiza la influencia de parámetros edáficos y climáticos en el crecimiento perimetral del alcornoque (Quercus suber L.). Los datos de crecimiento diametral fueron medidos con dendrómetros de banda colocados en 107 individuos de una parcela situada en una masa adehesada en Hinojos (Huelva) desde mayo de 2003 hasta julio de 2006....
Article
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Eucalyptus globulus is widely used in productive exotic plantations but the expansion of these plantations is limited by low temperatures, as its cold hardening capacity is limited (0.5 to 3.0°C). It is not well understood how nursery fertilisation affects the field performance of plants. This led us to study the effect of three mineral nutrients (...
Conference Paper
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2 Grupo Empresarial ENCE, S.A. Carretera Madrid-Huelva, km 630. Aptdo. 223. 21080-HUELVA (España) Resumen Eucalyptus globulus Labill., especie arbórea ampliamente utilizada en plantaciones comerciales forestales, precisa de un mayor conocimiento del efecto de la fertilización en vivero sobre la respues-ta post-transplante. Para ello, estaquillas en...
Article
To identify non-wood fast-growing species utilizable for pulp and paper production six Leucaena varieties were tested. Concurrently, these species were also tested for suitability as pulp materials on a laboratory scale. Biomass productivity of three Leucaena varieties (Leucaena diversifolia, Leucaena collinsii and Leucaena leucocephala) studied ra...
Article
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El conocimiento en el alcornoque (Quercus suber L.) del ciclo de biomasa y nutrientes a través del desfronde es uno de los aspectos fundamentales para la gestión adecuada de estas masas. Los principales aprovechamientos tradicionales de esta especie han sido el corcho y la bellota, por lo que la realización del descorche y las podas son operaciones...
Article
Xylophagous cerambycids of Cerambyx and Prinobius genus can play an important role in «oak decline» in Spain. New trends in the integrated pest management are dealing with control strategies based on the relation between olfactory perception of semiochemicals and insect behaviour. Electroantennography of olfactory stimuli enables to interpret the s...
Article
Full-text available
Xylophagous cerambycids of Cerambyx and Prinobius genus can play an important role in "oak decline" in Spain. New trends in the integrated pest management are dealing with control strategies based oil the relation between olfactory perception of semiochemicals and insect behaviour. Electroantennography of olfactory stimuli enables to interpret the...
Article
Full-text available
Xylophagous cerambycids of Cerambyx and Prinobius genus can play an important role in «oak decline» in Spain. New trends in the integrated pest management are dealing with control strategies based on the relation between olfactory perception of semiochemicals and insect behaviour. Electroantennography of olfactory stimuli enables to interpret the s...
Article
The operating conditions for an organosolv (ethyleneglycol) and two alkaline (soda-anthraquinone and kraft) processes for obtaining cellulose pulp and paper from holm oak (Quercus ilex) wood trimmings were optimized. A range of variation for each process variable (viz. temperature, cooking time and soda or ethyleneglycol concentration) was establis...
Article
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Las dehesas son sistemas agrosilvopastorales de gran importancia económica ecológica y social en la provincia de Huelva. Su gestión debe considerarse de forma integral sin olvidar las buenas prácticas selvícolas, en un momento en que muchas de estas formaciones están sufriendo la influencia del fenómeno de la ¿seca¿, que afecta de forma dramática a...
Article
Phytophthora cinnamomi Rands. (hongo patógeno del suelo) es el principal responsable del decaimiento de encinas y alcornoques en el Suroeste de la Península Ibérica. Este decaimiento es uno de los problemas ambientales más graves que amenaza la supervivencia y sostenibilidad, tanto ecológica como económica, de las formaciones de Quercus del sur pen...
Chapter
These proceedings contain 123 papers which are divided into 5 main sessions. The first session includes the characterization of silvopastoral systems in a global context while the second session deals with the effects of the management tools on the productivity and quality of silvopastoral systems. The ecological implications of the silvopastoral s...
Article
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Las regiones de clima mediterráneo se caracterizan por presentar las precipitaciones concentradas en la época fria y veranos secos calurosos. Ello conduce a la frecuente aparición de periodos de sequía, heladas, altas temperaturas y estivales, fuegos forestales y fenómenos de erosión edáfica que afectan la vida de las plantas. Estas regiones poseen...
Conference Paper
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ABSTRACT Phytophthora cinnamomi Rands is the main pathogen behind for holm and cork oak decline in the southwest of the Iberian Peninsula and poses one of the most severe environmental problems currently threatening the ecological and economic sustainability of Quercus forests in this region. In this work, we examined variability in the tolerance/r...
Article
Full-text available
La evolucion estacional del estado fisiologico de un alcornocal viene determinada por diferentes factores ecologicos, y afecta a las pautas de crecimiento de la especie. En este estudio se han medido el potencial hidrico, fotosintesis, transpiracion y fluorescencia de la clorofila de hojas en cuatro alcornoques durante un ano. Existen dos periodos...
Conference Paper
The Quercus species represent a fundamental environmental and socioeconomic value in the southwest of the Iberian Peninsula, and specially in the Comarca de Doñana region (f.e. 'pajareras’ of the National Park Doñana, or deciduous cork oaks as refuge of young for the Iberian lynx (Lynx pardinus)). The xilophagus beetles could act leading and/or inc...
Article
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The life history of Spanish pines and their relation to fire as the main disturbance factor in their ecosystems was analysed. The primary ecological attributes studied were the canopy seed bank (onset of cone production, percentage and persistence of serotinous cones), seed and cone morphology, sprouting and bark thickness. Four ecological groups w...
Article
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A wide set of phenotypic characteristics related to life history were studied in mature stands of Pinus canariensis throughout its natural range of distribution in the Canary archipelago. Natural forests ranging from those located in xeric areas through to the sub-tropical cloud forests and high mountain stands were classified into eight ecological...
Article
Canopy seed banks were analysed in post‐fire stands of Pinus halepensis , P. pinaster , P. nigra , and P. pinea . We determined age when flowering begins, age of first cone bearing, presence of serotinous cones and cone‐opening temperatures. By 15 years after the fire, P. halepensis had developed a large canopy seed bank (3–100 × 10 ⁴ seeds ha ⁻¹ )...
Article
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Al iniciar la recuperación de la raza mallorquina se vislumbró de una manera clara que su única funcionalidad era el pastoreo extensivo y que el nicho en donde se debía ubicar a la raza era en donde había estado hasta ahora, en el medio natural de Mallorca ; siendo una herramienta indispensable, mediante la silvopascicultura, en la prevención de in...
Article
Full-text available
La procedencia de Pinus pinaster Ait. de las estribaciones de la Sierra del Teleno (Suroeste de Leon, Espana) desarrolla conos serotinos. Este caracter ha sido estudiado en otras especies de pinos por su significado como estrategia de adaptacion al fuego. En el presente articulo, se analiza la gran variabilidad de durmiciones encontradas en las sem...
Article
Full-text available
This work presents the first results about the aptitude for electroantennography (EAG) of olfactory stimuli of Cerambyx welensii Kuster (Coleoptera, Cerambycidae), the main woodborer of holm oak (Quercus ilex L.) and cork oak (Quercus suber L.) in Western Andalusia (Spain). Due to the importance of the damages caused by this species, the characteri...
Article
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La brea, Cercidium praecox (Ruiz y Pav.) Burkart y Carter, es un árbol con amplia distribución en el Noroeste argentino, donde forma parte de las grandes unidades de vegetación del Parque Chaqueño o bien rodales puros (breales) en ambientes degradados. Esta especie tiene un escaso valor económico para la actividad de extracción maderera, pero su ex...
Article
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Resumen Desde principio del otoño hasta principio de primavera se estudió la evolución de algunos caracteres morfo-fisiológicos indicadores de la calidad de las plantas de vivero destinadas a repoblación forestal (altura, diámetro, distribución de biomasa, nutrición mineral, capacidad de regeneración de raíces y resistencia al frío). Las especies e...
Article
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Ensayo del cultivo de catorce especies de leguminosas leñosas de rápido crecimiento realizado en la provincia de Huelva para evaluar las posibilidades de su empleo como cultivos alternativos a los alimentarios destinados a la producción de biomasa para la fabricación de pasta para papel y como fuente de energía
Article
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La electroantenografía (EAG) es una técnica electrofisiológica, como tal aprovecha la naturaleza eléctrica de la excitación que experimentan los receptores olfativos de los insectos tras ser estimulados por una sustancia volátil. Esta cualidad permite estudiar la repercusión olfativa de los compuestos semioquímicos en los insectos. Tras revisar dif...
Article
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Los conocimientos actuales sobre el crecimiento del alcornoque (Quercus suber L.) presentan muchas lagunas. Entre los objetivos de los Proyectos de Investigación SUBERWOOD y SUBERCRE, se encuentra profundizar en el conocimiento del crecimiento diametral del alcornoque y la influencia de los factores ambientales y selvícolas. Para ello se ha impleme...
Article
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El comportamiento de las especies arboreas en la regeneracion depende de varias caracteristicas anatomicas y fisiologicas, entre las que se encuentra la capacidad de fotosintesis ante diferentes niveles de radiacion. Este trabajo analiza el comportamiento fotosintetico de plantas de 4 meses de edad de 7 especies de pinos espanoles (Pinus canariensi...

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