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Bosque (Valdivia)

versión On-line ISSN 0717-9200

Resumen

SCHLATTER, Juan E; GERDING, Víctor  y  CALDERON, Sigrid. Litter contribution to biogeochemical cycle in Eucalyptus nitens plantations, X Region, Chile . Bosque (Valdivia) [online]. 2006, vol.27, n.2, pp.115-125. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002006000200006.

The litterfall in Eucalyptus nitens plantations, established on an andisol (close to Fresia, X Region, Chile), were measured after canopy closure (4-7 years old), in an area under different fertilization treatments. At canopy closure annual litterfall was the highest (7-11 t ha-1), and becoming lower after it (5-6 t ha-1); the main quantity was measured in summer (45-60%). With the annual biomass the following amounts of nutrients return to the soil (kg ha-1 year-1): 20-50 N, 1-4 P, 5-40 K and 31-151 Ca, respectively, depending on age and fertilizer treatment. The O horizon (litter layer) accumulated 6-10 t ha-1 dry matter at age 7 and the thinning and pruning, carried out at age 5-6, contributed with similar amounts of branches and bark. The litter layer accumulated 100-190 N, <15 P, 20-40 K and 140-230 Ca kg ha-1, respectively. This biomass and nutrients constitute an important reservoir for the ecosystem and the sustainability of future rotations.

Palabras clave : Eucalyptus nitens; litter fall; litter layer; nutrient dynamic; biomass.

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