SciELO - Scientific Electronic Library Online

 
vol.29 número1Evaluación de la mortalidad de bosques de ñirre (Nothofagus antárctica) en la Patagonia chilena mediante imágenes Landsat TM y ETM+Monitoreo del estado de intervención y de la regeneración de Nothofagus pumilio en un plan de manejo forestal en el ecotono estepa-bosque de Tierra del Fuego, Argentina índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Bosque (Valdivia)

versión On-line ISSN 0717-9200

Resumen

RUBILAR, Rafael et al. Early response of Pinus radiata plantations to weed control and fertilization on metamorphic soils of the Coastal Range, Maule Region, Chile. Bosque (Valdivia) [online]. 2008, vol.29, n.1, pp.74-84. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002008000100009.

Management of Pinus radiata plantations in Chile has been intensified in the last decades using site preparation, weed control and fertilization. The lack of information on site-specific responses imposes uncertainty about the biological and economic benefits of these techniques. Early projection of initial tree growth response to intensive culture is extremely important but difficult to estimate unless a clear understanding of limiting resources exists at each site. Based on the three-year development of a weed control and fertilization trial located on metamorphic soils of the Coastal Range of Chile we investigated the site specific limitations at these sites. Fertilization treatments included no fertilization (F0) and fertilized (Fl) (26g N + 16.7g K + 2.5g B per plant). Banded weed control treatments on woody vegetation included one (WC1) and two consecutive years (WC2) of release. After 12 months, seedling survival was significantly increased by weed control but not by fertilization. Three years after establishment, weed control increased survival by 13%, and intensive silvicultural treatment gains were 56-103% for root collar diameter (RCD), 53-82% for height (HT), 269-591% for volume index (V=D2H), and 35-77% for crown diameter (CR). Lack of fertilization response suggested that water was the most limiting resource. Weed control responses represented almost one growing season gain in tree growth. No additional gains were obtained by weed control of woody vegetation during the second growing season. A linear relationship was found between log(CR) and log(V), suggesting a simplified method to estimate tree vigor at early stages of plantation development

Palabras clave : site specific silviculture; nutrients; water; growth efficiency; tree establishment.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons