carbono orgânico nas frações granulométricas e substâncias húmicas de um latossolo vermelho amarelo distrófico - lvad sob diferentes agrossistemas organic carbon in granulometric fraction and in humic substances of a brazilian oxisol under different land use systems

Clicks: 257
ID: 258996
2009
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Ranked #22 of 44 articles by views in tumour biology : the journal of the international society for oncodevelopmental biology and medicine

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Abstract
No presente estudo foram avaliados os teores de carbono orgânico total nas frações húmicas e granulométricas de um Latossolo Vermelho Amarelo distrófico sob quatro sistemas de uso: Floresta nativa (FL), agrossilvopastoril (SS), agroflorestal (SA) e pastagem (PA), na região norte mato-grossense. As amostras do solo foram coletadas em Juruena e Juara, Mato Grosso e preparadas para posterior fracionamento físico e químico. Os resultados indicaram que os diferentes sistemas de uso do solo influenciaram diretamente na quantidade de carbono orgânico total das frações granulométricas e das substâncias húmicas dos solos. O sistema agrossilvopastoril apresentou pronunciada diferenciação em relação aos demais sistemas estudados, principalmente quanto à concentração de humina e ácidos fúlvicos livres. A distribuição do carbono orgânico total na fração granulométrica fina (< 53 μm) foi superior a da fração grosseira (> 53 μm) para todos os agrossistemas, indicando maior presença de material orgânico agregado ao silte e argila.
This study aimed to assess the total organic carbon content in chemical and granulometric fraction of an Oxisol from four different land use systems. The soil samples were collected in Juruena and Juara, Mato Grosso (Brazil), and prepared for the physical and chemical fractionations. The results indicated that different land use systems caused significative carbon content changing in both humic substances and granulometric fraction. It was observed from the differentiated concentration of humine and free fulvic acids for each system. The distribution of total organic carbon in the granulometric fraction < 53 μm was higher than fraction > 53 μm for all land use, indicating greater presence of organic material in the silt and clay.
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martins2009actacarbono Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Eucarlos de Lima Martins;Josias do Espírito Santo Coringa;Oscarlina Lúcia dos Santos Weber
Journal tumour biology : the journal of the international society for oncodevelopmental biology and medicine
Year 2009
DOI
10.1590/S0044-59672009000300021
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000300021
Keywords
organic carbon tropical soils humic substancesscience (general)

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