Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil
This study compares the chemical composition of the solution and exchange complex of soil in a 3-year-old irrigated vineyard (Vitis vinifera L., Red Globe cultivar) with that of adjacent clearing in the native hyperxerophyllic 'caatinga' vegetation. The soils are classified as Plinthic Eut...
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Sociedade Brasileira de Ciência do Solo
2002-03-01
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doaj-c2ced2f4333d42e4b210fb077073ef532021-01-02T09:10:16ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572002-03-0126119120210.1590/S0100-06832002000100020S0100-06832002000100020Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, BrazilR. J. Heck0H. Tiessen1M. C. Santos2I. H. Salcedo3R. J. T. AlvesUniversity of GuelphUniversity of SaskatchewanUniversidade Federal Rural de PernambucoUniversidade Federal de PernambucoThis study compares the chemical composition of the solution and exchange complex of soil in a 3-year-old irrigated vineyard (Vitis vinifera L., Red Globe cultivar) with that of adjacent clearing in the native hyperxerophyllic 'caatinga' vegetation. The soils are classified as Plinthic Eutrophic Red-Yellow Argisol; according to Soil Taxonomy they are isohyperthermic Plinthustalfs. Detailed physiographic characterization revealed an impermeable gravel and cobble covering the crystalline rocks; the relief of this layer was more undulating than the level surface. Significant higher concentrations of extractable Na, K, Mg and Ca were observed within the vineyard. Lower soil acidity, higher Ca/Mg ratios, as well as lower sodium adsorption and Na/K ratios reflected additions of dolomitic lime, superphosphate and K-bearing fertilizers. As the water of the São Francisco River is of good quality for irrigation (C1S1), the increases in Na were primarily attributed to capillary rise from the saline groundwater table. None of the soil in the study area was found to be sodic. About 62% of the vineyard had an Ap horizon with salinity levels above 1.5dSm-1 (considered detrimental for grape production); according to average values for this horizon, a potential 13% reduction in grape production was predicted. Differences in chemical composition in function of distance to the collector canals were observed in the clearing, but not in the vineyard. The influence of differences in the elevations of the surface and impermeable layers, as well as pediment thickness, was generally weaker under irrigation. Under irrigation, soil moisture was greater in points of convergent surface waterflow; the effect of surface curvature on chemical properties, though less consistent, was also stronger in the vineyard.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000100020&lng=en&tlng=envideirafisiografiaumidade do solocations trocáveiscondutividade elétricacátions solúveissodicidadeacidez |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
R. J. Heck H. Tiessen M. C. Santos I. H. Salcedo R. J. T. Alves |
spellingShingle |
R. J. Heck H. Tiessen M. C. Santos I. H. Salcedo R. J. T. Alves Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil Revista Brasileira de Ciência do Solo videira fisiografia umidade do solo cations trocáveis condutividade elétrica cátions solúveis sodicidade acidez |
author_facet |
R. J. Heck H. Tiessen M. C. Santos I. H. Salcedo R. J. T. Alves |
author_sort |
R. J. Heck |
title |
Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil |
title_short |
Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil |
title_full |
Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil |
title_fullStr |
Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil |
title_full_unstemmed |
Chemical changes in argisols under irrigated grape production in the central São Francisco river valley, Brazil |
title_sort |
chemical changes in argisols under irrigated grape production in the central são francisco river valley, brazil |
publisher |
Sociedade Brasileira de Ciência do Solo |
series |
Revista Brasileira de Ciência do Solo |
issn |
1806-9657 |
publishDate |
2002-03-01 |
description |
This study compares the chemical composition of the solution and exchange complex of soil in a 3-year-old irrigated vineyard (Vitis vinifera L., Red Globe cultivar) with that of adjacent clearing in the native hyperxerophyllic 'caatinga' vegetation. The soils are classified as Plinthic Eutrophic Red-Yellow Argisol; according to Soil Taxonomy they are isohyperthermic Plinthustalfs. Detailed physiographic characterization revealed an impermeable gravel and cobble covering the crystalline rocks; the relief of this layer was more undulating than the level surface. Significant higher concentrations of extractable Na, K, Mg and Ca were observed within the vineyard. Lower soil acidity, higher Ca/Mg ratios, as well as lower sodium adsorption and Na/K ratios reflected additions of dolomitic lime, superphosphate and K-bearing fertilizers. As the water of the São Francisco River is of good quality for irrigation (C1S1), the increases in Na were primarily attributed to capillary rise from the saline groundwater table. None of the soil in the study area was found to be sodic. About 62% of the vineyard had an Ap horizon with salinity levels above 1.5dSm-1 (considered detrimental for grape production); according to average values for this horizon, a potential 13% reduction in grape production was predicted. Differences in chemical composition in function of distance to the collector canals were observed in the clearing, but not in the vineyard. The influence of differences in the elevations of the surface and impermeable layers, as well as pediment thickness, was generally weaker under irrigation. Under irrigation, soil moisture was greater in points of convergent surface waterflow; the effect of surface curvature on chemical properties, though less consistent, was also stronger in the vineyard. |
topic |
videira fisiografia umidade do solo cations trocáveis condutividade elétrica cátions solúveis sodicidade acidez |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000100020&lng=en&tlng=en |
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