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Forests 2017, 8(9), 353; doi:10.3390/f8090353

Direct Seeding of Pinus halepensis Mill. for Recovery of Burned Semi-Arid Forests: Implications for Post-Fire Management for Improving Natural Regeneration

1
Department of Agroforestry Technology and Science and Genetics, Higher Technical School of Agricultural and Forest Engineering, University of Castilla-La Mancha, Campus Universitario s/n, CP 02071 Albacete, Spain
2
Renewable Energy Research Institute (Section of Environment and Forest Resources), University of Castilla-La Mancha, Campus Universitario s/n, CP 02071 Albacete, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Xavier Úbeda and Victoria Arcenegui
Received: 20 June 2017 / Revised: 12 September 2017 / Accepted: 14 September 2017 / Published: 20 September 2017
(This article belongs to the Special Issue Effects of Post-Fire Management Activities on Forests)
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Abstract

Background: In order to maximize the resiliency of Pinus halepensis in semiarid forests, we analyzed direct seeding methods to recover burned stands by simulating post-fire soil treatments. Methods: Seeding was done by installing spot seeding (100 seeds in a 50 × 50 cm plot), using five methods: (1) covering seeding with wood chips; (2) seeding in branch piles; (3) seeding along trunks on contour-felled logs (on the shaded side); (4) seeding next to grass (Stipa tenacissima); and (5) seeding on the bare ground (control). The experiment was replicated according to aspect (northern and southern aspects). The response variables were seed germination (%), and seedling survival after the summer (measured in autumn 2015 and 2016). Direct seeding was carried out in 32 plots with 160-spot seeding, and data were analyzed using general linear models, including nested random effects. Results: Wood chips as a surface-covering material represented the only treatment that significantly improved seed germination and seedling survival (by 12.4%, and 17.4 seedlings m−2 in year 2, respectively) compared with the control in the two topographic aspects. Conclusions: Covering seeding with wood chips, and thus chipping wood within the burned stand, form a recommended post-fire treatment to improve regeneration in Pinus halepensis semiarid stands. View Full-Text
Keywords: artificial regeneration; seed germination; seedling survival; wood mulch; Aleppo pine artificial regeneration; seed germination; seedling survival; wood mulch; Aleppo pine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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García-Morote, F.A.; Martínez-García, E.; Andrés-Abellán, M.; Caballero, E.R.; Miettinen, H.; López-Serrano, F.R. Direct Seeding of Pinus halepensis Mill. for Recovery of Burned Semi-Arid Forests: Implications for Post-Fire Management for Improving Natural Regeneration. Forests 2017, 8, 353.

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