Artículo
Seedling response of Nothofagus species to N and P: linking plant architecture to N/P ratio and resorption proficiency
Agüero, Mariana
; Puntieri, Javier Guido
; Mazzarino, Maria Julia
; Grosfeld, Javier Edgardo
; Barroetaveña, Carolina
Fecha de publicación:
23/05/2014
Editorial:
Springer
Revista:
Trees
ISSN:
0931-1890
e-ISSN:
1432-2285
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Previous studies on mature forests of NW Argentinean Patagonia indicated that N is the main growth-limiting nutrient in most dominant tree species, while P limitation is uncommon, despite the soils’ volcanic origin. This pattern was inferred from leaf N/P ratios and resorption proficiencies, but has not been experimentally tested. We conducted a greenhouse trial with seedlings of two deciduous species of high timber quality, Nothofagus nervosa and N. obliqua, and soils characteristic of each species. Seedlings were fertilized with three levels of N (100, 200 and 400 mg kg−1 soil) with or without the concurrent application of a single P dose (60 mg kg−1 soil) during their second growing season. Response variables were morphological descriptors of shoot and root growth, N and P concentrations in green and senescent leaves and ectomycorrhizal infection. Both species were primarily limited by N: the addition of N resulted in higher shoot and root masses, an increased number of nodes, taller stems and greater basal and root diameters, while no effect of P was found. N/P ratios in green leaves and N and P resorption proficiencies indicate that with increased N availability P can become a secondary-limiting nutrient for N. nervosa. This was accompanied by the maintenance of ectomycorrhizal infection and mass allocation to roots in this species. The steep growth response of N. obliqua to N addition may signal a strong competitive capacity of this species when growing in soils of high N availability.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INIBIOMA)
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Agüero, Mariana; Puntieri, Javier Guido; Mazzarino, Maria Julia; Grosfeld, Javier Edgardo; Barroetaveña, Carolina; Seedling response of Nothofagus species to N and P: linking plant architecture to N/P ratio and resorption proficiency; Springer; Trees; 28; 4; 23-5-2014; 1185-1195
Compartir
Altmétricas