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Light availability and soil compaction influence the growth of underplanted following partial shelterwood harvest and soil scarification Public Deposited

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https://ir.library.oregonstate.edu/concern/articles/w6634521t

This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Canadian Science Publishing and can be found at:  http://www.nrcresearchpress.com/doi/10.1139/cjfr-2014-0353#.VtCm3UbcjuR

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  • We evaluated effects of top-soil scarification by heavy machinery on growth of two valuable and shade-intolerant tree species - Nothofagus dombeyi (evergreen and considered very plastic to different soil fertility levels) and Nothofagus alpina (deciduous and considered sensitive to soil fertility) - seedlings underplanted in Nothofagus old-growth forests subjected to shelterwood cuttings without the final cut in the Chilean Andes. We related tree basal diameter growth as it responds to light availability and soil compaction (as measured by resistance to penetration) by fitting a growth model based on the Michaelis-Menten equation. Predicted growth of N. dombeyi was greater than N. alpina in high- and low-light levels, but without differences between species. Both species showed significant differences at high levels of penetration resistance (>2,000kPa). Differences for N. dombeyi occurred above ~40% in total light, and for N. alpina above ~20%. However, they were not different when compared at low and intermediate levels of penetration resistance. The results suggest that partial shelterwood cuts may provide adequate light levels to achieve appropriate growth of underplanted Nothofagus seedlings. However, if regeneration of N. alpina is desired, scarification of topsoil needs to be implemented with more caution in canopy openings, as traffic and soil removal by heavy machinery can have detrimental effects on growth of this and other species that are more sensitive to soil compaction.
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  • Soto, D. P., Donoso, P. J., Salas, C., & Puettmann, K. J. (2015). Light availability and soil compaction influence the growth of underplanted Nothofagus following partial shelterwood harvest and soil scarification. Canadian Journal of Forest Research, 45(8), 998-1005. doi:10.1139/cjfr-2014-0353
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  • 45
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  • 8
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  • The study was supported by the FONDEF-CONICYT D07I1034, FONDECYT no. 11110270, and CONAF 015/2013 grants. We appreciate the logistic support from Forestal Neltume Carranco S.A., especially from Luis Molina. DPS is thankful for the support from the Becas Chile doctoral fellowship at Oregon State University from the CONICYT Government of Chile.
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  • description.provenance : Submitted by Open Access (openaccess@library.oregonstate.edu) on 2016-02-26T19:23:04Z No. of bitstreams: 1 SotoDanielForestryLightAvailabilitySoilCompaction.pdf: 647406 bytes, checksum: 14abb2433b71e95902e25b94f9a67ed2 (MD5)
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