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  <titleInfo>
    <title>Avaliação dos atributos do solo sob diferentes usos na região de Humaitá, Amazonas</title>
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  <name type="personal">
    <namePart>Mantovanelli, Bruno Campos</namePart>
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  <name type="personal">
    <namePart>Silva, Diogo André Pinheiro da</namePart>
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  <name type="personal">
    <namePart>Campos, Milton César Costa</namePart>
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  <name type="personal">
    <namePart>Gomes,  Romário Pimenta</namePart>
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  <name type="personal">
    <namePart>Soares, Marcelo Dayron Rodrigues</namePart>
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  <name type="personal">
    <namePart>Santos, Luís Antônio Coutrim dos</namePart>
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RESUMO:    A implantação de atividades florestais, agrícolas e pecuária vem modificando a cobertura vegetal original de grande parte do território brasileiro. Ecossistemas naturais, como o cerrado e a floresta amazônica, vêm perdendo suas características originais e cedendo lugar para essas atividades. O objetivo foi avaliar os atributos do solo sob diferentes usos na fazenda Santa Rita, em Humaitá, Amazonas no período de 2012 a 2013. O solo foi classificado como Cambissolo Háplico Alítico plíntico. Foram selecionadas três áreas: área de pastagem abandonada, área de agricultura abandonada e área de campo nativo, com vegetação nativa. Em cada sistema de uso, foi demarcada uma área de 60 × 80 m, com 12 pontos amostrais, e os solos foram coletados nas camadas de 0,00 - 0,05 m e 0,05 - 0,10 m, com estrutura preservada, totalizando, assim, 24 amostras por sistema de uso. Realizaram-se as seguintes análises físicas: textura, macroporosidade, microporosidade, porosidade total, umidade volumétrica do solo, densidade do solo, estabilidade de agregados. Realizaram-se as seguintes análises químicas: pH em água, acidez potencial, alumínio trocável, carbono orgânico e estoque de carbono. Para a análise dos dados, foram utilizadas as estatísticas univariada e multivariada. A substituição da vegetação nativa por sistemas de usos ocasionou alterações nos atributos físicos e químicos do solo. O uso das técnicas multivariadas mostrou-se eficiente na distinção de ambientes sobre os sistemas de usos estudados. 


PALAVRAS-CHAVE:   Floresta Amazônica, Ecossistemas naturais, Cambissolo</abstract>
  <abstract>


ABSTRACT:     The  implementation  of  forestry,  agricultural  and  livestock  activities  is  modifying the original vegetation of much of the Brazilian territory. Natural ecosystems such  as  savanna  and  the  Amazon  rain  forest  have  been  losing  their  original  features,  making  room  for  these  activities.  The  objective  of  the  present  study  was  to  evaluate  the  soil attributes of areas under different land uses in the region of Humaitá. The study was conducted between 2012 and 2013 in the municipality of Santa Rita Humaita, Amazonas state, Brazil. The soil was classified as Alitic Plinthic Haplic Cambisol. Three areas were selected:  area  of  abandoned  pasture,  area  of  abandoned  agriculture,  and  natural  area  with  native  vegetation.  In  each  use  system,  an  area  of  60  ×  80  m  with  twelve  sampling  points  was  demarcated  and  soils  were  collected  in  layers  from  0.00  to  0.05  and  0.05  to  0.10 m depths with preserved structure, totaling 24 samples per use system. The following physical analyses were conducted: texture, macroporosity, microporosity, total porosity, soil water content, bulk density and aggregate stability. The following chemical analyses were carried  out:  pH,  potential  acidity,  exchangeable  aluminum,  organic  carbon  and  carbon  stock. Univariate and multivariate statistical analyses were performed. The replacement of  the  native  vegetation  with  use  systems  causes  changes  in  physical  and  chemical  soil  properties. The use of multivariate techniques was effective in distinguishing environments of the use systems studied. 



KEYWORDS   Amazon forest, Natural ecosystems, Cambisol</abstract>
  <note>

Publicação online; 28 ref.; 4 tables; Summaries (En, Pt)</note>
  <subject>
    <topic>ECOSSISTEMA</topic>
  </subject>
  <subject>
    <topic>ANÁLISE DO SOLO</topic>
  </subject>
  <subject>
    <topic>USO DA TERRA</topic>
  </subject>
  <subject>
    <topic>AMAZONAS</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Revista de Ciências Agrárias (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Belém-PA Faculdade de Ciências Agrárias do Pará 1999</publisher>
    </originInfo>
    <identifier>2024-6634</identifier>
    <identifier type="issn">1517-591X Impresso/Versão online ISSN 2177-8760</identifier>
    <identifier type="local">BR2025002697</identifier>
    <part>
      <text>v. 58(2) p. 122-130; (2015)</text>
    </part>
  </relatedItem>
  <identifier type="uri">https://ajaes.ufra.edu.br/index.php/ajaes/article/view/1822/631</identifier>
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    <url>https://ajaes.ufra.edu.br/index.php/ajaes/article/view/1822/631</url>
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    <recordCreationDate encoding="marc">250819</recordCreationDate>
    <recordChangeDate encoding="iso8601">20250819153138.0</recordChangeDate>
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