Produção Nacional
Revisado por pares
Soil microbial biomass in an agroforestry system of Northeast Brazil
2015; International Center for Tropical Agriculture; Volume: 3; Issue: 1 Linguagem: Inglês
10.17138/tgft(3)41-48
ISSN2346-3775
AutoresRosane Cláudia Rodrigues, Ricardo Silva Araújo, Clésio Santos Costa, Antonio José Temístocles Lima, Maria Elizabete de Oliveira, José Antônio Alves Cutrim Júnior, Francisco Naysson de Sousa Santos, Jocélio dos Santos Araújo, Vilma Maria dos Santos, Ademir Sérgio Ferreira de Araújo,
Tópico(s)Soil Carbon and Nitrogen Dynamics
ResumoAgroforestry systems (AFS) are considered alternative land use options to help prevent soil degradation and improve soil microbial biomass and organic C status. However, it is unclear how different densities of babassu palm [Attalea speciosa (syn. Orbignya phalerata)], which is an important tree in Northeast Brazil, affect the soil microbial biomass. We investigated the soil microbial biomass C and activity under AFS with different densities of babassu palm associated with Brachiaria brizantha grass. Soil microbial biomass C (MBC), soil microbial biomass N (MBN), MBC:total organic C ratio, fluorescein diacetate hydrolysis and dehydrogenase activity showed highest values in plots with high density of babassu palm. On the other hand, the respiratory quotient (qCO2) was significantly greater in plots without babassu palm. Brachiaria brizantha in monoculture may promote C losses from the soil, but AFS with high density of babassu palm may increase the potential of soils to accumulate C.Keywords: Enzyme activity, tropical soil, babassu palm, silvopastoral system, soil quality.DOI: 10.17138/TGFT(3)41-48
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