Revisión de las primeras experiencias de resinación en Galicia (1950-1970)

Chamorro, Enrique Martínez

doi:10.15304/rr.id4499

Cited by 3 publications

(2 citation statements)

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“…In addition to the resin-tapping activities already existing in the Spanish Meseta Central, new initiatives are currently being taken to promote this activity throughout the country, even in areas where resin production had 153 ⋅ 10 6 m 3 not been previously tested (Martínez 2016). Speci cally, resin yield is seen as an attractive complementary activity in the timber-oriented maritime pine forest of northwest Spain (Gómez-García et al 2017; Zas et al 2020;Touza et al 2021), not only because of the potential contribution to pro tability (Martínez et al 2019) but also because of the multiple and valuable ecosystem services that resin tapping provides (Demko and Machava 2022; Soliño et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Resin yield response to different tapping methods and stimulant pastes in Pinus pinaster Ait

López-Álvarez

Zas²,

Martı́nez

et al. 2023

Preprint

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Selecting the best resin tapping method and stimulant paste in the resin tapping process is crucial. In timber-oriented rainy Atlantic pine forests of north-west Spain, the interest in resin tapping is raising but information on the best tapping methods and pastes is still lacking. In this study, an appropriate experimental design used on five representative plots of Pinus pinaster, allowed us to explore the resin productive differences between two tapping methods (traditional Spanish method and circular groove) and three stimulant treatments (control, Ethephon and ASACIF). The use of a standardized measure of resin yield allowed to adequately compare methods differing in groove length. Results indicated that the standard resin yield was 1.43 times greater with the traditional method than with the circular groove method. The two stimulant pastes drastically increased resin yield (up to 6 fold) in all sites and for all tapping methods. The effectiveness of the paste was also influenced by the tapping method, obtaining greater increases in resin yield after the application of stimulant paste in trees with the circular groove method. Resin yield was only slightly related to the dasometric variables and varied among test sites when no pastes were used, but differences among sites disappeared when stimulant pastes were used. Our results contribute to the understanding of the factors involved in resin performance and the technological development of the sector.

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Section: Introductionmentioning

confidence: 99%

Resin yield response to different tapping methods and stimulant pastes in Pinus pinaster Ait

López-Álvarez

Zas²,

Martı́nez

et al. 2023

Preprint

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“…Resin extraction in Spain is seasonal, taking place when weather conditions are favourable; production generally begins between March and June and ends in October or November [14]. Although resin extraction is not a traditional activity in Galicia (NW Spain), the boom in resin production in the mid-1900s led to studies of the potential for production in the region, which were conducted by the former Instituto Forestal de Investigaciones y Experiencias (Institute for Forestry Research and Experimentation) [15]. Reactivation of the resin sector in Spain has led to increasing interest in resin exploitation in Galicia, where pure stands of Pinus pinaster currently occupy an area of 217,281 ha [16].…”

Section: Introductionmentioning

confidence: 99%

Resin-Tapping Production in Pinus pinaster Ait. Stands in Galicia (NW Spain): Effects of Location, Number of Faces, Wound Width and Production Year

García-Méijome

Lorenzo

Blanco³

et al. 2023

Forests

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Resin or gum is secreted by conifers, mainly members of the genus Pinus, in response to physical and/or chemical stimulation, which can be induced by tapping live trees, i.e., by making repeated wounds in the trees. Resin production could potentially complement timber production (the main economic activity) in pine stands in Galicia (NW Spain). In addition, the particular characteristics of Galician woodlands (smallholdings, sloping land, presence of shrubs, high density of trees) imply different yields and costs than in pine stands dedicated to resin production in other parts of Spain. Therefore, a specific regional management model that is different from the traditional model established for other resin producing areas in the Iberian Peninsula is required. In this study, resin tapping was applied in each of the three years before the trees were felled, in two different locations, with one or two faces tapped and wounds of two different widths (12 and 16 cm) made across the face(s). Tapping two faces yielded more resin than tapping a single face, thus confirming the study hypothesis. When only one face was tapped, the plot location acquired greater importance, with production being higher in the location characterised by a higher mean annual temperature. Increasing the width of the wound did not always increase the amount of resin obtained per tree, which depended on the number of faces open: when two faces were tapped, increasing the width of the wound increased resin production in both locations in each of the three years of the trial. The weather conditions in each year masked the effect of the tapping season, and production did not follow any particular trend over time. The importance of the local weather conditions in the study areas and the environmental conditions in each year are discussed. The study findings are important for decision-making regarding the treatment and selection of areas for resin extraction.

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Compatibility between resin tapping management of Pinus pinaster during the last three years and its uses as solid wood

González-Prieto,

Alegre,

Picos

et al. 2024

Eur. J. Wood Prod.

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Unlike the conventional resin tapping processes throughout long periods of time or the complete life of the trees, in which the cellular and physical–mechanical characteristics of the whole wood could be modified, the resin tapping system, only in the last years before the ideal-timber cutting shift, shows no significant influence on some physical–mechanical timber properties. Samples of one-face and two-face resin-tapped trees were compared with samples of untapped tress. Using wood density as a reference property in solid wood and after checking the normality of the samples, no significant differences were observed. Therefore, according to the results of this work, the tapping process in the last three years combined with timber logging should not affect or limit its use as solid wood. For a better adjustment in the study, untapped wood and wood from resin tapping logs of the furthest (upper) and closest (lower) part from the tapping area were compared. The wood density mean values were, respectively for the upper and lower areas: 557 kg/m3 and 570 kg/m3 for one-face resin-tapped wood; 567 kg/m3 and 564 kg/m3 for two-face resin-tapped wood; and 556 kg/m3 and 560 kg/m3 for untapped wood. The tapping techniques used in the study are identified as common extract methods, and, according to the results, adequate added value with multifunctional forest use without a potential depreciation in the mechanical properties was found.

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Revisión de las primeras experiencias de resinación en Galicia (1950-1970)

Cited by 3 publications

References 0 publications

Resin yield response to different tapping methods and stimulant pastes in Pinus pinaster Ait

Resin yield response to different tapping methods and stimulant pastes in Pinus pinaster Ait

Resin-Tapping Production in Pinus pinaster Ait. Stands in Galicia (NW Spain): Effects of Location, Number of Faces, Wound Width and Production Year

Compatibility between resin tapping management of Pinus pinaster during the last three years and its uses as solid wood

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