Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil
Natural grasslands with savannah-like characteristics associated to forest mosaics are found within Southern and Eastern Amazonas, Western Rondônia and Northern Roraima, being conditioned to local edaphic factors. The aim of this study was to assess both physical and geospatial attributes of an Camb...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Uberlândia
2016-04-01
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| Series: | Bioscience Journal |
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| Online Access: | http://www.seer.ufu.br/index.php/biosciencejournal/article/view/32656 |
| _version_ | 1818437084379086848 |
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| author | Leandro Coutinho Alho Milton Cesar Costa Campos Bruno Campos Mantovanelli Douglas Marcelo Pinheiro Silva Zigomar Menezes Souza Jose Mauricio da Cunha Marcelo Dayron Rodrigues Soares |
| author_facet | Leandro Coutinho Alho Milton Cesar Costa Campos Bruno Campos Mantovanelli Douglas Marcelo Pinheiro Silva Zigomar Menezes Souza Jose Mauricio da Cunha Marcelo Dayron Rodrigues Soares |
| author_sort | Leandro Coutinho Alho |
| collection | DOAJ |
| description | Natural grasslands with savannah-like characteristics associated to forest mosaics are found within Southern and Eastern Amazonas, Western Rondônia and Northern Roraima, being conditioned to local edaphic factors. The aim of this study was to assess both physical and geospatial attributes of an Cambisol under natural grasslands and an Ultisol under a forest fragment in Humaitá - AM, Brazil. In each area, we established a sampling grid in the dimensions of 70 × 70 m, with regular sampling spacing of 10 m and three collection depths: 0.0-0.05, 0.05-0.10 and 0.10-0.20 m, totaling 192 sampling points. Macroporosity (MaP), microporosity (MiP), bulk density (Ds) and total porosity (TP) were determined by soil samples with preserved structure, using a volumetric ring. Soil resistance to penetration (SRP) was measured by an automatic penetrometer after being subjected to a 0.006 MPa tension. Data were submitted to descriptive statistics and geostatistics analysis. The soil under natural grasslands showed values considered critical of Ds, SRP, MaP at all evaluated depths, with significant values at 0.10-0.20 m layer of 1.54 kg dm-3; 2.08 MPa and 0.05 m3 m-3, respectively. Ultisol under the forest fragments showed higher range values and consequently greater geospatial continuity due to the assessed physical attributes, since this soil has a greater stability of its physical structure. Based on the physical properties of the soil, structural function ineffectiveness of the Ultisol is a key factor for the occurrence of grassland in this region. |
| first_indexed | 2024-12-14T17:19:03Z |
| format | Article |
| id | doaj.art-5d24c941e7f149e989cead05a1eddd62 |
| institution | Directory Open Access Journal |
| issn | 1981-3163 |
| language | English |
| last_indexed | 2024-12-14T17:19:03Z |
| publishDate | 2016-04-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Bioscience Journal |
| spelling | doaj.art-5d24c941e7f149e989cead05a1eddd622022-12-21T22:53:21ZengUniversidade Federal de UberlândiaBioscience Journal1981-31632016-04-0132210.14393/BJ-v32n2a2016-3265632656Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, BrazilLeandro Coutinho AlhoMilton Cesar Costa CamposBruno Campos MantovanelliDouglas Marcelo Pinheiro SilvaZigomar Menezes SouzaJose Mauricio da CunhaMarcelo Dayron Rodrigues SoaresNatural grasslands with savannah-like characteristics associated to forest mosaics are found within Southern and Eastern Amazonas, Western Rondônia and Northern Roraima, being conditioned to local edaphic factors. The aim of this study was to assess both physical and geospatial attributes of an Cambisol under natural grasslands and an Ultisol under a forest fragment in Humaitá - AM, Brazil. In each area, we established a sampling grid in the dimensions of 70 × 70 m, with regular sampling spacing of 10 m and three collection depths: 0.0-0.05, 0.05-0.10 and 0.10-0.20 m, totaling 192 sampling points. Macroporosity (MaP), microporosity (MiP), bulk density (Ds) and total porosity (TP) were determined by soil samples with preserved structure, using a volumetric ring. Soil resistance to penetration (SRP) was measured by an automatic penetrometer after being subjected to a 0.006 MPa tension. Data were submitted to descriptive statistics and geostatistics analysis. The soil under natural grasslands showed values considered critical of Ds, SRP, MaP at all evaluated depths, with significant values at 0.10-0.20 m layer of 1.54 kg dm-3; 2.08 MPa and 0.05 m3 m-3, respectively. Ultisol under the forest fragments showed higher range values and consequently greater geospatial continuity due to the assessed physical attributes, since this soil has a greater stability of its physical structure. Based on the physical properties of the soil, structural function ineffectiveness of the Ultisol is a key factor for the occurrence of grassland in this region.http://www.seer.ufu.br/index.php/biosciencejournal/article/view/32656soils attributesnatural grasslandsforest |
| spellingShingle | Leandro Coutinho Alho Milton Cesar Costa Campos Bruno Campos Mantovanelli Douglas Marcelo Pinheiro Silva Zigomar Menezes Souza Jose Mauricio da Cunha Marcelo Dayron Rodrigues Soares Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil Bioscience Journal soils attributes natural grasslands forest |
| title | Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil |
| title_full | Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil |
| title_fullStr | Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil |
| title_full_unstemmed | Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil |
| title_short | Physical and geospatial attributes of inceptisols and ultisols under native vegetation in Humaitá, AM, Brazil |
| title_sort | physical and geospatial attributes of inceptisols and ultisols under native vegetation in humaita am brazil |
| topic | soils attributes natural grasslands forest |
| url | http://www.seer.ufu.br/index.php/biosciencejournal/article/view/32656 |
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