Data/hora: 01/06/2024 01:01:38

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 06/11/2003
Data da última atualização: | 26/10/2018
Autoria: | OLIVEIRA, C. A. de; MUZZI, M. R. S.; PURCINO, H. A.; MARRIEL, I. E.; SÁ, N. M. H. de.
Afiliação: | Christiane Abreu de Oliveira, Universidade Federal de Minas Gerais - UFMG/Instituto de Ciências Biológicas/Departamento deBotânica; Maria Rita Scotti Muzzi, Universidade Federal de Minas Gerais - UFMG/Instituto de Ciências Biológicas/Departamento deBotânica; Hortênsia Abrantes Purcino, Empresa de Pesquisa Agropecuária de Minas Gerais/Fazenda Experimental Santa Rita; IVANILDO EVODIO MARRIEL, CNPMS; Nadja Maria Horta de Sá, Universidade Federal de Minas Gerais - UFMG/Instituto de Ciências Biológicas/Departamento deBotânica.
Título: | Decomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil.
Ano de publicação: | 2003
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 9, p. 1089-1095, set. 2003
Idioma: | Inglês
Notas: | ítulo em português: Decomposição da serrapilheira de Arachis pintoi e Hyparrhenia rufa em sistemasde monocultura e consórcio sob solo de várzea.
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.
Palavras-Chave: | Forrageira; forrageiras; Matéria orgânica do solo; Microorganismo; Pinto peanuts; Thatching grass.
Thesagro: | Amendoim; Capim Jaraguá; Microrganismo.
Thesaurus Nal: | Arachis; forage; microorganisms; soil organic matter.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/25119/1/v38n9a10.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)

Exemplares:

AI-SEDE - (25119-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CNPA - (16164-1) - ADD - AP - -- - 630.5 -  -  - DIS