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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
30/05/2023 |
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Data da última atualização: |
20/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VOLF, M. R.; BENITES, V. de M.; AZEVEDO, A. C.; MORAES, M. F.; TIRITAN, C. S.; ROSOLEM, C. A. |
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Afiliação: |
MARCELO R. VOLF, UNIVERSIDADE DO OESTE PAULISTA; VINICIUS DE MELO BENITES, CNPS; ANTÔNIO C. AZEVEDO, UNIVERSIDADE DE SÃO PAULO; MILTON F. MORAES, UNIVERSIDADE FEDERAL DE MATO GROSSO; CARLOS S. TIRITAN, UNIVERSIDADE DO OESTE PAULISTA; CIRO A. ROSOLEM, UNIVERSIDADE DO ESTADO DE SÃO PAULO. |
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Título: |
Soil mineralogy and K reserves in soils from the Araguaia River valley, Brazil. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Geoderma Regional, e00654, Jun. 2023. |
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DOI: |
https://doi.org/10.1016/j.geodrs.2023.e00654 |
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Idioma: |
Inglês |
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Conteúdo: |
In humid tropical regions, intense weathering extensively depletes soil nutrients. However, soils in the Araguaia River Valley, Brazil, are not responsive to potassium (K) fertilization. To explore the reasons for this lack of responsiveness, an extensive exploratory soil sampling campaign was performed in areas of the valley with different land uses and soil management practices. Soil was sampled at depths of 0-20 cm and 20-40 cm, and exchangeable K (Ke) and non-exchangeable K (Kne) were assessed. The average soil Ke content in the region was 66.3 mg kg-1, above the minimum required value for crop growth. The soil Kne content ranged from one to five times the soil Ke content and was greater in the 20- to 40-cm layer than in the 0- to 20-cm layer. The linear correlation between Ke and Kne was significant only in the silt fraction. Mineralogical analysis of the clay and silt fractions of selected samples showed that the dominant minerals in the clay fraction were kaolinite, vermiculite with or without interlayer hydroxy-Al (HIV), illite, goethite, and gibbsite. Mica and feldspar were found in the silt fraction of several samples. In the silt and clay fractions, the main source of Kne was 2:1 phyllosilicates, which may be interstratifications of illite/vermiculite-hydroxy and illite/vermiculite. The results indicated that Urochloa spp. functions as a K scavenger in deep layers and promotes K biocycling in the system. An equation for predicting Kne extracted with nitric acid on the basis of soil Ke and silt contents was developed. MenosIn humid tropical regions, intense weathering extensively depletes soil nutrients. However, soils in the Araguaia River Valley, Brazil, are not responsive to potassium (K) fertilization. To explore the reasons for this lack of responsiveness, an extensive exploratory soil sampling campaign was performed in areas of the valley with different land uses and soil management practices. Soil was sampled at depths of 0-20 cm and 20-40 cm, and exchangeable K (Ke) and non-exchangeable K (Kne) were assessed. The average soil Ke content in the region was 66.3 mg kg-1, above the minimum required value for crop growth. The soil Kne content ranged from one to five times the soil Ke content and was greater in the 20- to 40-cm layer than in the 0- to 20-cm layer. The linear correlation between Ke and Kne was significant only in the silt fraction. Mineralogical analysis of the clay and silt fractions of selected samples showed that the dominant minerals in the clay fraction were kaolinite, vermiculite with or without interlayer hydroxy-Al (HIV), illite, goethite, and gibbsite. Mica and feldspar were found in the silt fraction of several samples. In the silt and clay fractions, the main source of Kne was 2:1 phyllosilicates, which may be interstratifications of illite/vermiculite-hydroxy and illite/vermiculite. The results indicated that Urochloa spp. functions as a K scavenger in deep layers and promotes K biocycling in the system. An equation for predicting Kne extracted with nitric acid on... Mostrar Tudo |
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Palavras-Chave: |
Intemperismo; Non-exchangeable potassium; Potássio não-trocável; Weathering soil. |
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Thesagro: |
Latossolo; Manejo do Solo. |
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Thesaurus Nal: |
Oxisols; Silt; Soil management. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02416naa a2200301 a 4500
001 2154084
005 2023-12-20
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.geodrs.2023.e00654$2DOI
100 1 $aVOLF, M. R.
245 $aSoil mineralogy and K reserves in soils from the Araguaia River valley, Brazil.$h[electronic resource]
260 $c2023
520 $aIn humid tropical regions, intense weathering extensively depletes soil nutrients. However, soils in the Araguaia River Valley, Brazil, are not responsive to potassium (K) fertilization. To explore the reasons for this lack of responsiveness, an extensive exploratory soil sampling campaign was performed in areas of the valley with different land uses and soil management practices. Soil was sampled at depths of 0-20 cm and 20-40 cm, and exchangeable K (Ke) and non-exchangeable K (Kne) were assessed. The average soil Ke content in the region was 66.3 mg kg-1, above the minimum required value for crop growth. The soil Kne content ranged from one to five times the soil Ke content and was greater in the 20- to 40-cm layer than in the 0- to 20-cm layer. The linear correlation between Ke and Kne was significant only in the silt fraction. Mineralogical analysis of the clay and silt fractions of selected samples showed that the dominant minerals in the clay fraction were kaolinite, vermiculite with or without interlayer hydroxy-Al (HIV), illite, goethite, and gibbsite. Mica and feldspar were found in the silt fraction of several samples. In the silt and clay fractions, the main source of Kne was 2:1 phyllosilicates, which may be interstratifications of illite/vermiculite-hydroxy and illite/vermiculite. The results indicated that Urochloa spp. functions as a K scavenger in deep layers and promotes K biocycling in the system. An equation for predicting Kne extracted with nitric acid on the basis of soil Ke and silt contents was developed.
650 $aOxisols
650 $aSilt
650 $aSoil management
650 $aLatossolo
650 $aManejo do Solo
653 $aIntemperismo
653 $aNon-exchangeable potassium
653 $aPotássio não-trocável
653 $aWeathering soil
700 1 $aBENITES, V. de M.
700 1 $aAZEVEDO, A. C.
700 1 $aMORAES, M. F.
700 1 $aTIRITAN, C. S.
700 1 $aROSOLEM, C. A.
773 $tGeoderma Regional, e00654, Jun. 2023.
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Registro original: |
Embrapa Solos (CNPS) |
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| Registros recuperados : 51 | |
| 1. |  | FAGERIA, N. K.; MOREIRA, A.; CASTRO, C.; MORAES, M. F. Indices de acidez para produção de soja cultivada no Estado de Tocantins. In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 32., 2011, São Pedro, SP. Resumos expandidos... Londrina: Embrapa Soja, 2011. p. 317-320. Editado por Adilson de Oliveira Junior, Odilon Ferreira Saraiva, Regina Maria Villas Bôas de Campos Leite.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 9. | | MORAES, M. F.; NUTTI, M. R.; WATANABE, E.; CARVALHO, J. L. V. de. Práticas agronômicas para aumentar o fornecimento de nutrientes e vitaminas nos produtos agrícolas alimentares. In: SIMPÓSIO BRASILEIRO DE AGROPECUÁRIA SUSTENTÁVEL, 1., 2009, Viçosa, MG. Agricultura, pecuária e cooperativismo: anais. Viçosa, MG: Universidade Federal de Viçosa, 2009. p. 298-312.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 20. | | FAGERIA, N. K.; MOREIRA, A.; MORAES, L. A. C.; MORAES, M. F. Root growth, nutrient uptake, and nutrient-use efficiency by roots of tropical legume cover crops as influenced by phosphorus fertilization. Communications in Soil Science and Plant Analysis, New York, v. 45, n. 5, p. 555-569, 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Soja. |
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| Registros recuperados : 51 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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