Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/109211
Unidade da Embrapa/Coleção:: Área de Informação da Sede - Artigo em periódico indexado (ALICE)
Data do documento: 6-Nov-2003
Tipo do Material: Artigo em periódico indexado (ALICE)
Autoria: OLIVEIRA, C.A. de
MUZZI, M.R.S.
PURCINO, H.A.
MARRIEL, I.E.
SÁ, N.M.H. de
Informaçães Adicionais: CNPMS
Título: Decomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil.
Edição: 2003
Fonte/Imprenta: Pesquisa Agropecuária Brasileira, Brasília, v.38, nº 9, p.1089-1095, set. 2003.
Idioma: en
Palavras-chave: : forage
microorganisms
pinto peanuts
soil organic matter
thatching grass
forrageiras
microrganismo
arachis
matéria orgânica do solo
capim jaraguá
Conteúdo: Tropical grasslands under lowland soils are generally underutilized and the litter of forage legumes may be used to recover these degraded pastures. The objective of this work was to study the dynamics of litter decomposition of Arachis pintoi (pinto peanut), Hyparrhenia rufa (thatching grass) and a mixture of both species in a lowland soil. These treatments were analyzed in three areas: grass monoculture, legume monoculture and legume intercropped with the grass during the dry and wet seasons. Litter bags containing the legume, grass or a mixture of both species were incubated to estimate the decomposition rate and microorganism colonization. Decomposition constants (K) and litter half-lives (T1/2) were estimated by an exponential model whereas number of microorganisms in specific media were determined by plate dilution. The decomposition rate, release of nutrients and microorganisms number, especially bacteria, increased when pinto peanut was added to thatching grass, influenced by favorable lignin/N and C/N ratios in legume litter. When pinto peanut litter was incubated in the grass plots, 50% N and P was released within about 135 days in the dry season and in the wet season, the equivalent release occurred within 20 days. These results indicate that A. pintoi has a great potential for nutrient recycling via litter and can be used to recover degraded areas.
Ano de Publicação: 2003
Aparece nas coleções:Artigo em periódico indexado (AI-SEDE) / Embrapa Informação Tecnológica (SCT)

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