02502naa a2200337 a 450000100080000000500110000800800410001910000230006024501250008326000090020850001550021752013870037265000120175965000110177165000190178265000240180165000130182565000190183865000180185765300150187565300160189065300310190665300190193765300180195665300200197470000200199470000190201470000190203370000210205277300910207311092112018-10-26       2003    bl uuuu     u00u1 u    #d1 aOLIVEIRA, C. A. de  aDecomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil.  c2003  aítulo em português: Decomposição da serrapilheira de Arachis pintoi e Hyparrhenia rufa em sistemasde monocultura e consórcio sob solo de várzea.  aTropical 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.  aArachis  aforage  amicroorganisms  asoil organic matter  aAmendoim  aCapim Jaraguá  aMicrorganismo  aForrageira  aforrageiras  aMatéria orgânica do solo  aMicroorganismo  aPinto peanuts  aThatching grass1 aMUZZI, M. R. S.1 aPURCINO, H. A.1 aMARRIEL, I. E.1 aSÁ, N. M. H. de  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 38, n. 9, p. 1089-1095, set. 2003