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Advisor(s)
Abstract(s)
Mixed stands with nitrogen fixing secondary species can improve the vigour and the stand environment of the
targeted species. The aim of this study was to better understand the effect of the consociation of a N-fixing species
(black locust) with a broadleaf quality timber production (wild cherry). The study was conducted in 11 year old
plantations located in the Northeast of Portugal. The treatments considered were: pure black locust, pure wild
cherry and mixture of wild cherry and black locust. Each plot had six lines with 12 trees and a buffer strip line.
The samplings were collected on the plantation line within a radius of 50 to 100 cm from the tree. In each plot we
measured soil N mineralization dynamic, soil microbial biomass carbon (MBC) and nitrogen (MBN), microbial
quotient (MBC/Corg), metabolic quotient (qCO2), microbial respiration and dehydrogenase activity. Results showed
a positive impact of the black locust species on the supply of nitrogen to the soil. The net N-mineralization rates
were, at the end of this study, about three times greater in the pure black locust than in the pure wild cherry and
about two times greater in the mixture than in the pure wild cherry. MBC and cumulative soil respiration were
higher in the mixture than in the pure cherry plantation soil which may reflect positive changes in the soil
environment.
Description
Keywords
Prunus avium Robinia pseudoacacia Accessory trees Soil respiration Dehydrogenase activity Metabolic quotient
Citation
Pereira, Ermelinda; Santos, Sónia A.P.; Arrobas, Margarida; Patrício, Maria do Sameiro (2013). Microbial biomass and N mineralization in mixed plantations of broadleaves and nitrogen-fixing species = La biomasa microbiana y la mineralización de N en plantaciones mixtas de frondosas y especies fijadoras de nitrógeno. Investigacion Agraria Sistemas y Recursos Forestales. ISSN 1131-7965. 20:3, p. 516-524
Publisher
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)