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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
14/03/2008 |
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Data da última atualização: |
05/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARVALHO, J. L. N.; CERRI, C. E. P.; CERRI, C. C.; FEIGL, B. J.; PÍCCOLO, M. de C.; GODINHO, V. de P. C.; HERP, U. |
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Afiliação: |
JOÃO LUÍS NUNES CARVALHO, UNIVERSIDADE DE SÃO PAULO; C. E. P. CERRI, UNIVERSIDADE DE SÃO PAULO; C. C. CERRI, UNIVERSIDADE DE SÃO PAULO; B. J. FEIGL, UNIVERSIDADE DE SÃO PAULO; M. C. PÍCCOLO, UNIVERSIDADE DE SÃO PAULO; VICENTE DE PAULO CAMPOS GODINHO, CPAF-RO; U. HERPIN, UNIVERSIDADE DE SÃO PAULO. |
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Título: |
Changes of chemical properties in an oxisol after clearing of native Cerrado vegetation for agricultural use in Vilhena, Rondonia State, Brazil. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 96, n. 1-2, p. 95-102, 2007. |
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DOI: |
https://doi.org/10.1016/j.still.2007.04.001 |
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Idioma: |
Inglês |
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Conteúdo: |
Native vegetation clearing in the Amazon Cerrado region for agricultural purposes may be modifying soil chemical characteristics. The extent of change depends on the management practices used. We evaluated changes in chemical properties of a clayey oxisol (dystrophic red yellow latosol) under no-tillage (NT) and conventional tillage (CT). Soil samples were taken randomly (n = 5) in July 2004 at 0–5 cm, 5–10 cm, 10–20 cm and 20–30 cm depths at six treatments: Cerrado with native vegetation, CT cultivated with rice for 1 year (1CT) and 2 years (2CT), and NT cultivated with soybean for 1 year (1NT), 2 years (2NT) and 3 years (3NT) in each case after a 2-year period of rice under CT. Soil pH (CaCl2, KCl and water), ΔpH, total acidity (H+ + Al3+), total organic carbon (TOC), available P, exchangeable K, Ca, Mg, potential cation exchange capacity (CEC) and base saturation (V) were determined. The highest pH values were determined in topsoil layers at the older NT adoption. Under Cerrado pH was lower than under cultivation at all depths due to absence of lime application. Generally, negative values of ΔpH were observed at all sites in all layers indicating predominant presence of negative charges in the soil. Although not statistically significant it seems that the amount of negative charges was higher in deeper layers. Total acidity displayed the highest values throughout the soil profile under Cerrado and low pH and low concentrations of exchangeable bases. Cultivated systems with fertilizer generated considerable increases of P, K, Ca, and Mg compared to Cerrado. Soil macronutrient content and base saturation under NT gradually increased throughout the profile with time. Highest CEC values were calculated for the 0–5 cm and 5–10 cm layers under Cerrado and NT systems. For the 0–5 cm layer CEC was lower at the CT system compared to the Cerrado and the oldest year under NT system. Alteration of TOC was more pronounced in the top 10 cm layer at all sites. The highest content was measured in the topsoil layer under Cerrado. Considering the future land use in Cerrado areas the NT system, if properly managed, appears to be the favourable management option of the existing croplands established after Cerrado clearing. MenosNative vegetation clearing in the Amazon Cerrado region for agricultural purposes may be modifying soil chemical characteristics. The extent of change depends on the management practices used. We evaluated changes in chemical properties of a clayey oxisol (dystrophic red yellow latosol) under no-tillage (NT) and conventional tillage (CT). Soil samples were taken randomly (n = 5) in July 2004 at 0–5 cm, 5–10 cm, 10–20 cm and 20–30 cm depths at six treatments: Cerrado with native vegetation, CT cultivated with rice for 1 year (1CT) and 2 years (2CT), and NT cultivated with soybean for 1 year (1NT), 2 years (2NT) and 3 years (3NT) in each case after a 2-year period of rice under CT. Soil pH (CaCl2, KCl and water), ΔpH, total acidity (H+ + Al3+), total organic carbon (TOC), available P, exchangeable K, Ca, Mg, potential cation exchange capacity (CEC) and base saturation (V) were determined. The highest pH values were determined in topsoil layers at the older NT adoption. Under Cerrado pH was lower than under cultivation at all depths due to absence of lime application. Generally, negative values of ΔpH were observed at all sites in all layers indicating predominant presence of negative charges in the soil. Although not statistically significant it seems that the amount of negative charges was higher in deeper layers. Total acidity displayed the highest values throughout the soil profile under Cerrado and low pH and low concentrations of exchangeable bases. Cultivated systems wit... Mostrar Tudo |
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Palavras-Chave: |
Rondônia. |
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Thesagro: |
Cerrado; Vegetação Nativa. |
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Categoria do assunto: |
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Marc: |
LEADER 03050naa a2200241 a 4500
001 1709363
005 2024-08-05
008 2007 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.still.2007.04.001$2DOI
100 1 $aCARVALHO, J. L. N.
245 $aChanges of chemical properties in an oxisol after clearing of native Cerrado vegetation for agricultural use in Vilhena, Rondonia State, Brazil.$h[electronic resource]
260 $c2007
520 $aNative vegetation clearing in the Amazon Cerrado region for agricultural purposes may be modifying soil chemical characteristics. The extent of change depends on the management practices used. We evaluated changes in chemical properties of a clayey oxisol (dystrophic red yellow latosol) under no-tillage (NT) and conventional tillage (CT). Soil samples were taken randomly (n = 5) in July 2004 at 0–5 cm, 5–10 cm, 10–20 cm and 20–30 cm depths at six treatments: Cerrado with native vegetation, CT cultivated with rice for 1 year (1CT) and 2 years (2CT), and NT cultivated with soybean for 1 year (1NT), 2 years (2NT) and 3 years (3NT) in each case after a 2-year period of rice under CT. Soil pH (CaCl2, KCl and water), ΔpH, total acidity (H+ + Al3+), total organic carbon (TOC), available P, exchangeable K, Ca, Mg, potential cation exchange capacity (CEC) and base saturation (V) were determined. The highest pH values were determined in topsoil layers at the older NT adoption. Under Cerrado pH was lower than under cultivation at all depths due to absence of lime application. Generally, negative values of ΔpH were observed at all sites in all layers indicating predominant presence of negative charges in the soil. Although not statistically significant it seems that the amount of negative charges was higher in deeper layers. Total acidity displayed the highest values throughout the soil profile under Cerrado and low pH and low concentrations of exchangeable bases. Cultivated systems with fertilizer generated considerable increases of P, K, Ca, and Mg compared to Cerrado. Soil macronutrient content and base saturation under NT gradually increased throughout the profile with time. Highest CEC values were calculated for the 0–5 cm and 5–10 cm layers under Cerrado and NT systems. For the 0–5 cm layer CEC was lower at the CT system compared to the Cerrado and the oldest year under NT system. Alteration of TOC was more pronounced in the top 10 cm layer at all sites. The highest content was measured in the topsoil layer under Cerrado. Considering the future land use in Cerrado areas the NT system, if properly managed, appears to be the favourable management option of the existing croplands established after Cerrado clearing.
650 $aCerrado
650 $aVegetação Nativa
653 $aRondônia
700 1 $aCERRI, C. E. P.
700 1 $aCERRI, C. C.
700 1 $aFEIGL, B. J.
700 1 $aPÍCCOLO, M. de C.
700 1 $aGODINHO, V. de P. C.
700 1 $aHERP, U.
773 $tSoil & Tillage Research$gv. 96, n. 1-2, p. 95-102, 2007.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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