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Heterogeneity of soil surface ammonium concentration and other characteristics, related to plant specific variability in a Mediterranean-type ecosystem

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Resumo:Heterogeneity and dynamics of eight soil surface characteristics essential for plantsdammonium and nitrate concentrations, water content, temperature, pH, organic matter, nitrification and ammonification ratesdwere studied in a Mediterranean-type ecosystem on four occasions over a year. Soil properties varied seasonally and were influenced by plant species. Nitrate and ammonium were present in the soil at similar concentrations throughout the year. The positive correlation between them at the time of greatest plant development indicates that ammonium is a readily available nitrogen source in Mediterranean-type ecosystems. The results presented here suggest that plant cover significantly affects soil surface characteristics.
Autores principais:Cruz, Cristina
Outros Autores:Bio, Ana M.F.; Jullioti, Aldo; Tavares, Alice; Dias, Teresa; Martins-Loução, Maria Amélia
Assunto:Soil nitrogen availability Mediterranean Nitrate Ammonium Plant functional types
Ano:2008
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Universidade de Lisboa
Idioma:inglês
Origem:Repositório da Universidade de Lisboa

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