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Abstract:

In the Pacific Northwest, a mixture of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and red alder (Alnus rubra Bong.) often results when red alder regenerates naturally in planted conifer stands. The relationships among stand structure, tree mortality, tree size, and understory development in the two species mixtures were explored at two sites for the first 16 years after planting. Treatments included a range of species proportions, and red alder was either planted simultaneously with Douglas-fir or planting was delayed for 5 years. Red alder was also removed from some simultaneously planted proportions. Both replacement effects (total stand density held constant) and additive effects (stand density doubled) of the interaction were considered. Red alder grew relatively better at Cascade Head Experimental Forest in the Coast Range, while Douglas-fir grew better at H.J. Andrews Experimental Forest in the less temperate Cascade Mountains. Possible production benefits from mixed plantings were examined using two methods of calculation. Potential production benefits from certain planted proportions of the two species occurred at H.J. Andrews Experimental Forest. No planting time or species proportion resulted in yield improvements over monoculture stands at Cascade Head Experimental Forest. Understory species also varied because of differences in site and stand characteristics that resulted from the differences in planting times and species proportions. © 2006 NRC.

Registro:

Documento: Artículo
Título:Effects of species mixtures on growth and stand development of Douglas-fir and red alder
Autor:Radosevich, S.R.; Hibbs, D.E.; Ghersa, C.M.
Filiación:Department of Forest Science, Oregon State University, Corvallis, OR 97331-5752, United States
Instituto de Investigaciones Fisiologicas Y Ecologicas Vinculadas a la Agricultura (IFEVA), Departamento Recursos Naturales Y Ambiente, Universidad de Buenos Aires, Argentina
Palabras clave:Softwoods; Vegetation; Cascade Head Experimental Forest; Cascade Mountains; Mixed plantings; Tree mortality; Hardwoods; coniferous forest; deciduous tree; forest dynamics; mixed forest; stand dynamics; understory; Alnus Rubra; Planting; Pseudotsuga; North America; Pacific Northwest; Alnus rubra; Betulaceae; Coniferophyta; Pseudotsuga; Pseudotsuga menziesii
Año:2006
Volumen:36
Número:3
Página de inicio:768
Página de fin:782
DOI: http://dx.doi.org/10.1139/x05-280
Título revista:Canadian Journal of Forest Research
Título revista abreviado:Can. J. For. Res.
ISSN:00455067
CODEN:CJFRA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00455067_v36_n3_p768_Radosevich

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Citas:

---------- APA ----------
Radosevich, S.R., Hibbs, D.E. & Ghersa, C.M. (2006) . Effects of species mixtures on growth and stand development of Douglas-fir and red alder. Canadian Journal of Forest Research, 36(3), 768-782.
http://dx.doi.org/10.1139/x05-280
---------- CHICAGO ----------
Radosevich, S.R., Hibbs, D.E., Ghersa, C.M. "Effects of species mixtures on growth and stand development of Douglas-fir and red alder" . Canadian Journal of Forest Research 36, no. 3 (2006) : 768-782.
http://dx.doi.org/10.1139/x05-280
---------- MLA ----------
Radosevich, S.R., Hibbs, D.E., Ghersa, C.M. "Effects of species mixtures on growth and stand development of Douglas-fir and red alder" . Canadian Journal of Forest Research, vol. 36, no. 3, 2006, pp. 768-782.
http://dx.doi.org/10.1139/x05-280
---------- VANCOUVER ----------
Radosevich, S.R., Hibbs, D.E., Ghersa, C.M. Effects of species mixtures on growth and stand development of Douglas-fir and red alder. Can. J. For. Res. 2006;36(3):768-782.
http://dx.doi.org/10.1139/x05-280