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Nutrient cycling in a mixed-species plantation of Eucalyptus globulus and Acacia mearnsii

Forrester, David; Bauhus, Juergen; Cowie, Annette

Description

A doubling of aboveground biomass production has been observed in mixtures of Eucalyptus globulus Labill. and Acacia mearnsii de Wildeman when compared with monocultures after 11 years of growth. This study examined to what extent increased nitrogen (N) availability and accelerated rates of nutrient cycling may contribute to increased growth in mixtures. Monocultures of E. globulus (E) and A. mearnsii (A) and mixtures of these species were planted in a species replacement series: 100% E, 75% E...[Show more]

dc.contributor.authorForrester, David
dc.contributor.authorBauhus, Juergen
dc.contributor.authorCowie, Annette
dc.date.accessioned2015-12-13T23:05:06Z
dc.date.available2015-12-13T23:05:06Z
dc.identifier.issn0045-5067
dc.identifier.urihttp://hdl.handle.net/1885/85382
dc.description.abstractA doubling of aboveground biomass production has been observed in mixtures of Eucalyptus globulus Labill. and Acacia mearnsii de Wildeman when compared with monocultures after 11 years of growth. This study examined to what extent increased nitrogen (N) availability and accelerated rates of nutrient cycling may contribute to increased growth in mixtures. Monocultures of E. globulus (E) and A. mearnsii (A) and mixtures of these species were planted in a species replacement series: 100% E, 75% E + 25% A, 50% E + 50% A, 25% E + 75% A, and 100% A. Litterfall mass increased with aboveground biomass production and was highest in 50:50 mixtures and lowest in monocultures. Owing to higher N concentrations of A. mearnsii litter, N contents of annual litterfall were at least twice as high in stands containing A. mearnsii (32-49 kg·ha -1·year-1) as in E. globulus monocultures (14 kg·ha-1·year-1). Stands with A. mearnsii also cycled higher quantities of phosphorus (P) in annual litterfall than E. globulus monocultures. This study demonstrated that mixing A. mearnsii with E. globulus increased the quantity and rates of N and P cycled through aboveground litterfall when compared with E. globulus monocultures. Thus, mixed-species plantations appear to be a useful silvicultural system to improve nutrition of eucalypts without fertilization.
dc.publisherNRC Research Press
dc.sourceCanadian Journal of Forest Research
dc.subjectKeywords: Forestry; Growth kinetics; Phosphorus; Acacia mearnsii; Eucalyptus globulus; Mixed-species plantation; Nutrient cycling; Cultivation; biomass; fertilizer application; litterfall; monoculture; nitrogen; phosphorus; soil nutrient; Eucalyptus; Growth; Nutrie
dc.titleNutrient cycling in a mixed-species plantation of Eucalyptus globulus and Acacia mearnsii
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume35
dc.date.issued2005
local.identifier.absfor070508 - Tree Nutrition and Physiology
local.identifier.ariespublicationMigratedxPub13750
local.type.statusPublished Version
local.contributor.affiliationForrester, David, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationBauhus, Juergen, University of Freiburg
local.contributor.affiliationCowie, Annette, NSW Department of Primary Industries
local.bibliographicCitation.startpage2942
local.bibliographicCitation.lastpage2950
local.identifier.doi10.1139/x05-214
dc.date.updated2015-12-12T07:58:51Z
local.identifier.scopusID2-s2.0-33645793687
CollectionsANU Research Publications

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