02766naa a2200349 a 450000100080000000500110000800800410001902400310006010000190009124501280011026000090023830000090024752017280025665000090198465000230199365000090201665000170202565300330204265300230207565300240209865300360212265300270215865300230218570000150220870000170222370000190224070000250225970000180228470000290230270000170233177300680234820910692018-05-02       2018    bl uuuu     u00u1 u    #d7 a10.5539/jas.v10n5p3292DOI1 aREIS, V. R. R.  aCarbon stocks and soil organic matter quality under different of land uses in the Maranhense Amazon.h[electronic resource]  c2018  a9 p.  aIn  the  face  of  the  traditional  model of  succession  of  native  environments  in  pastures  or  agricultural  areas,  followed  by  superpastejo  and  the  concern  with  emissions  of  greenhouse  gases  in  the  Brazilian  Amazon  region,  this work aims to determine the influence of different land uses on carbon sequestration and soil organic matter changes  in  the  municipality  of  Pindaré-Mirim,  in  state  of  Maranhão.  This  study  evaluated  different  uses  of  the  soil:   native   forest;   secondary   vegetation   (capoeira);   degraded   pasture and CLFI (Crop-Livestock-Forest Integration)  system.  The  deformed  and  undisturbed  samples  were  collected  at  depths:  0.00-0.10,  0.10-0.20,  0.20-0.30,  0.30-0.40,  0.40-0.60,  0.60-0.80  and .80-1.00  m.  Soil  densities  were  determined  by  the  volumetric ring  method,  the  carbon  stocks  by  the  carbon  content  in  the  soil  evaluating  the  dry  combustion,  and  the  accumulated  carbon  stocks  were  calculated  in  1.00  m.  The  physical  fractions  of  the  organic  matter  were  determined by means of the granulometric method. At depth 0.0-0.10 m, the soil density in the native forest (1.17 g cm-3)  was  lower  than  the  average  of  degraded  pasture  (1.40 g  cm-3).  There  was  no  difference  in  the  carbon ontent between all the land uses up to 0.40 m depth. The accumulated carbon stocks up to 1.00 m ranged from 49.52 Mg ha-1 to 64.41 Mg ha-1 and were higher in the native forest compared to capoeira and the ICLF system. In relation to the accumulated carbon stock, the native forest and degraded pasture were the ones that obtained the highest levels, followed by the capoeira and the CLFI system.  aSoil  aMatéria orgânica  aSolo  aUso da Terra  aAgricultura de baixo carbono  aDegraded grassland  aEstoques de carbono  aFractionation of organic matter  aLow carbon agriculture  aPastagem degradada1 aSIGNOR, D.1 aMUNIZ, L. C.1 aSILVA, M. B. e1 aREGO, C. A. R. de M.1 aGARCIA, U. S.1 aCANTANHÊDE, I. S. de L.1 aCOSTA, J. B.  tJournal of Agricultural Sciencegv. 10, n. 5, p. 329-337, 2018.