02205naa a2200289 a 450000100080000000500110000800800410001902200140006010000200007424501600009426000090025452012950026365000210155865000210157965000220160065000160162265000190163865000090165765300170166665300250168365300260170865300260173465300240176070000210178470000280180577300820183310695252023-02-06       2007    bl uuuu     u00u1 u    #d  a0004-95731 aLEITE, L. F. C.  aInfluence of organic and mineral fertilisation on organic matter fractions of a Brazilian Acrisol under maize/common bean intercrop.h[electronic resource]  c2007  aIn 1984, a field experiment was initiated in Coimbra, State of Minas Gerais, Brazil, involving the combination of 3 levels of mineral fertilisers at control (0); 10 kg N/ha, 15 kg P/ha, and 17 kg K/ha (MF1); 20 kg N/ha, 30 kg P/ ha, and 34 kg K/ha (MF2); and 2 levels of organic compost at control ( 0) and 40 m(3)/ha (OC) in a maize/common bean intercrop. Soil samples were collected (0-0.10 and 0.10-0.20 m) in 2000 to evaluate the impact of mineral and organic compost on total carbon (TOC) and nitrogen (TN) stocks and on organic carbon pools of a Ferric Acrisol (Chromosol in the Australian Soil Classi. cation). Additional soil samples were collected from an adjacent site covered by secondary Atlantic Forest as a reference. The conversion of forest to agriculture caused a reduction in most of TOC, TN, and microbial biomass carbon, free-light fraction carbon (C-LF), and non-labile carbon. The carbon pools in cultivated plot were enhanced by the addition of compost alone. At both depths, TOC and TN stocks were higher (P &lt 0.05) in the MF2+ OC than MF2 treatment. Compared to soils that have received mineral fertiliser alone or combined with compost, the stocks of labile organic carbon, TN, and CLF were significantly affected (P &lt 0.05) by the sole application of compost.  acropping systems  ahumic substances  amicrobial biomass  aNitrogênio  aPlantio Direto  aSolo  aCarbon index  aEcossistema tropical  aLabile organic carbon  aLight fraction carbon  aTropical ecosystems1 aMENDONÇA, E. S.1 aMACHADO, P. L. O. de A.  tAustralian Journal of Soil Research, Austráliagv. 45, n. 1, p. 25-32, 2007.