INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Early nutrition of Nothofagus nervosa in a nursery experiment in NW Patagonia.
Autor/es:
AGUERO, M.; M.J. MAZZARINO; PUNTIERI, J. ; P. SATTI; GROSSFELD, J. ; KOWALJOW, E.; STECCONI, M. ; CREGO, M.P.
Lugar:
Bariloche
Reunión:
Congreso; VI Southern Connection Congress; 2010
Institución organizadora:
Southern Connection
Resumen:
With the
objective of analysing the early nutrition of seedlings of native Patagonian
trees, an experiment was carried out on Nothofagus
nervosa seedlings growing in a nursery. Based on previous results on mature
forests, we assumed that nitrogen is the limiting factor for this species
(phosphorous was found not to be limiting). Plants were grown on young volcanic
soils taken from N. nervosa forests
with minimal disturbance, and fertilized (after one year without fertilization)
with 100, 200 and 400 g N kg-1 soil, with or without a single rate
of P (60 g kg-1), and compared with unfertilized (control)
seedlings. Twelve months after fertilization, seedlings under intermediate N
rates and P (200 N + 60 P) reached higher stem diameter, length, number of
leaves and root diameter than control seedlings. Above-ground and below-ground
biomass and N concentration in green leaves followed trends similar to those of
the other variables, although differences among treatments were not significant
for biomass and N concentration. These results suggest that, unlike our
previous ideas, P might be playing an important role in the early nutrition of N. nervosa seedlings.