Potential acidity determination for soils with high soil organic matter
ABSTRACT Lime applications are used in acid soils to correct pH and eliminate Al3+ toxicity in crops. The lime rates are determined based on the estimated soil potential acidity (H+Al), using soil incubations with calcium carbonate (CaCO3) for 180 days, being a time-consuming and laborious process....
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Sociedade Brasileira de Ciência do Solo
2025-03-01
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| Series: | Revista Brasileira de Ciência do Solo |
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| author | Douglas Luiz Grando Lucas Peranzoni Deponti Marcos de Lima Rodrigues Cauan Guerra Martins William Natale Djalma Eugenio Schmitt Gustavo Nogara de Siqueira Natália Moreira Palermo João Kaminski Gustavo Brunetto |
| author_facet | Douglas Luiz Grando Lucas Peranzoni Deponti Marcos de Lima Rodrigues Cauan Guerra Martins William Natale Djalma Eugenio Schmitt Gustavo Nogara de Siqueira Natália Moreira Palermo João Kaminski Gustavo Brunetto |
| author_sort | Douglas Luiz Grando |
| collection | DOAJ |
| description | ABSTRACT Lime applications are used in acid soils to correct pH and eliminate Al3+ toxicity in crops. The lime rates are determined based on the estimated soil potential acidity (H+Al), using soil incubations with calcium carbonate (CaCO3) for 180 days, being a time-consuming and laborious process. An alternative method with calcium hydroxide [Ca(OH)2] for 96 h incubation may efficiently estimate H+Al, but it needs further studies. Also, soils from specific regions in southern Brazil have high organic matter (SOM) contents (>5 %), medium clay contents (20-40 %), and are stony, lacking research to improve liming recommendations. The study aimed to determine potential acidity and adjust lime rates for acidity correction in medium-textured soils with high SOM and stoniness in the Serra Gaúcha region (RS), Brazil, and to test the efficiency of the short incubation alternative method. For this purpose, 20 native forest soils were sampled in the 0.00-0.20 m layer. Samples were dried, sieved, and subjected to short and long incubations. The H+Al values obtained through the incubations were compared with the Manual de calagem e adubação para os Estados do Rio Grande do Sul e de Santa Catarina (CQFS-RS/SC, 2016) equation. The H+Al values estimated by CQFS-RS/SC were lower than those determined by the long incubation, indicating lime rates ranging from 2.0 to 5.1 Mg ha-1 lower than in the long incubation. The short incubation showed a positive correlation (0.93***) with the long incubation. The potential acidity for soil water pH 6.5 can be obtained by long [H+Al (cmolc dm-3) = 1354.9e-0.855TSM] and short [H+Al (cmolc dm-3) = 3763.8e-1.086TSM] incubations, in which TSM is the Tampão Santa Maria index. On average, 34 % of the soil volume was composed of rock fragments (>2 mm). We recommend adjusting the limestone rates for soils with stoniness, considering only the percentage of soil in the diagnostic layer (SDL%). |
| format | Article |
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| institution | OA Journals |
| issn | 1806-9657 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Sociedade Brasileira de Ciência do Solo |
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| series | Revista Brasileira de Ciência do Solo |
| spelling | doaj-art-e5af1c53b5b24eb08cce9987f50181f02025-08-20T02:16:19ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572025-03-014910.36783/18069657rbcs20240146Potential acidity determination for soils with high soil organic matterDouglas Luiz Grandohttps://orcid.org/0000-0003-4305-6250Lucas Peranzoni Depontihttps://orcid.org/0000-0003-4971-7603Marcos de Lima Rodrigueshttps://orcid.org/0000-0001-7278-4527Cauan Guerra Martinshttps://orcid.org/0009-0007-9630-8200William Natalehttps://orcid.org/0000-0001-9572-4463Djalma Eugenio Schmitthttps://orcid.org/0000-0001-9665-9704Gustavo Nogara de Siqueirahttps://orcid.org/0000-0002-5544-9599Natália Moreira Palermohttps://orcid.org/0000-0003-0375-4636João KaminskiGustavo Brunettohttps://orcid.org/0000-0002-3174-9992ABSTRACT Lime applications are used in acid soils to correct pH and eliminate Al3+ toxicity in crops. The lime rates are determined based on the estimated soil potential acidity (H+Al), using soil incubations with calcium carbonate (CaCO3) for 180 days, being a time-consuming and laborious process. An alternative method with calcium hydroxide [Ca(OH)2] for 96 h incubation may efficiently estimate H+Al, but it needs further studies. Also, soils from specific regions in southern Brazil have high organic matter (SOM) contents (>5 %), medium clay contents (20-40 %), and are stony, lacking research to improve liming recommendations. The study aimed to determine potential acidity and adjust lime rates for acidity correction in medium-textured soils with high SOM and stoniness in the Serra Gaúcha region (RS), Brazil, and to test the efficiency of the short incubation alternative method. For this purpose, 20 native forest soils were sampled in the 0.00-0.20 m layer. Samples were dried, sieved, and subjected to short and long incubations. The H+Al values obtained through the incubations were compared with the Manual de calagem e adubação para os Estados do Rio Grande do Sul e de Santa Catarina (CQFS-RS/SC, 2016) equation. The H+Al values estimated by CQFS-RS/SC were lower than those determined by the long incubation, indicating lime rates ranging from 2.0 to 5.1 Mg ha-1 lower than in the long incubation. The short incubation showed a positive correlation (0.93***) with the long incubation. The potential acidity for soil water pH 6.5 can be obtained by long [H+Al (cmolc dm-3) = 1354.9e-0.855TSM] and short [H+Al (cmolc dm-3) = 3763.8e-1.086TSM] incubations, in which TSM is the Tampão Santa Maria index. On average, 34 % of the soil volume was composed of rock fragments (>2 mm). We recommend adjusting the limestone rates for soils with stoniness, considering only the percentage of soil in the diagnostic layer (SDL%).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832025000100904&lng=en&tlng=enstoniness soilssoil organic carbonlime requirementacidity neutralization |
| spellingShingle | Douglas Luiz Grando Lucas Peranzoni Deponti Marcos de Lima Rodrigues Cauan Guerra Martins William Natale Djalma Eugenio Schmitt Gustavo Nogara de Siqueira Natália Moreira Palermo João Kaminski Gustavo Brunetto Potential acidity determination for soils with high soil organic matter Revista Brasileira de Ciência do Solo stoniness soils soil organic carbon lime requirement acidity neutralization |
| title | Potential acidity determination for soils with high soil organic matter |
| title_full | Potential acidity determination for soils with high soil organic matter |
| title_fullStr | Potential acidity determination for soils with high soil organic matter |
| title_full_unstemmed | Potential acidity determination for soils with high soil organic matter |
| title_short | Potential acidity determination for soils with high soil organic matter |
| title_sort | potential acidity determination for soils with high soil organic matter |
| topic | stoniness soils soil organic carbon lime requirement acidity neutralization |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832025000100904&lng=en&tlng=en |
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