Modifications of phosphorus in Latosol as a function of humic acids and acidity
ABSTRACT The effect of humic acids (HA) on phosphorus (P) availability is still contradictory; thus, it is necessary to identify the conditions that play a crucial role in this effect. The aim of this study was to investigate the effect of HA application, combined with doses of P, on the content of...
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Universidade Federal de Campina Grande
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| author | Márcia H. Beck Pedro A. V. Escosteguy Deborah P. Dick |
| author_facet | Márcia H. Beck Pedro A. V. Escosteguy Deborah P. Dick |
| author_sort | Márcia H. Beck |
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| description | ABSTRACT The effect of humic acids (HA) on phosphorus (P) availability is still contradictory; thus, it is necessary to identify the conditions that play a crucial role in this effect. The aim of this study was to investigate the effect of HA application, combined with doses of P, on the content of this nutrient in a Latosol with and without acidity correction. Two experiments were carried out, one with HA from peat and another with HA from mineral charcoal (leonardite). Doses of these acids (0; 1.12 and 5.62 mg C g-1 of soil) and P (26.2 and 104.7 mg P g-1 of soil, 1 and 4-fold higher than recommended, respectively) were tested at soil pH 4.5 and 7.0, in a three-factorial design. The soil was incubated for 20 days and the soil-P content was measured by Mehlich-1 and remaining-P tests. The effect of HAs on P availability varied with the P doses and soil acidity. Humic acids application increases P content in Latosol when P dose is higher than recommended and there is no acidity correction (pH 4.5). However, there is no effect of HAs application on soil-P content when applying the recommended amount of this nutrient, irrespective of the pH value. |
| format | Article |
| id | doaj-art-56dcc5ab251749cfb43186f1bf9dca7d |
| institution | Kabale University |
| issn | 1807-1929 |
| language | English |
| publisher | Universidade Federal de Campina Grande |
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| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-56dcc5ab251749cfb43186f1bf9dca7d2025-08-20T03:26:29ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-192922748849210.1590/1807-1929/agriambi.v22n7p488-492S1415-43662018000700488Modifications of phosphorus in Latosol as a function of humic acids and acidityMárcia H. BeckPedro A. V. EscosteguyDeborah P. DickABSTRACT The effect of humic acids (HA) on phosphorus (P) availability is still contradictory; thus, it is necessary to identify the conditions that play a crucial role in this effect. The aim of this study was to investigate the effect of HA application, combined with doses of P, on the content of this nutrient in a Latosol with and without acidity correction. Two experiments were carried out, one with HA from peat and another with HA from mineral charcoal (leonardite). Doses of these acids (0; 1.12 and 5.62 mg C g-1 of soil) and P (26.2 and 104.7 mg P g-1 of soil, 1 and 4-fold higher than recommended, respectively) were tested at soil pH 4.5 and 7.0, in a three-factorial design. The soil was incubated for 20 days and the soil-P content was measured by Mehlich-1 and remaining-P tests. The effect of HAs on P availability varied with the P doses and soil acidity. Humic acids application increases P content in Latosol when P dose is higher than recommended and there is no acidity correction (pH 4.5). However, there is no effect of HAs application on soil-P content when applying the recommended amount of this nutrient, irrespective of the pH value.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700488&lng=en&tlng=enphosphatesorptionhumic substances |
| spellingShingle | Márcia H. Beck Pedro A. V. Escosteguy Deborah P. Dick Modifications of phosphorus in Latosol as a function of humic acids and acidity Revista Brasileira de Engenharia Agrícola e Ambiental phosphate sorption humic substances |
| title | Modifications of phosphorus in Latosol as a function of humic acids and acidity |
| title_full | Modifications of phosphorus in Latosol as a function of humic acids and acidity |
| title_fullStr | Modifications of phosphorus in Latosol as a function of humic acids and acidity |
| title_full_unstemmed | Modifications of phosphorus in Latosol as a function of humic acids and acidity |
| title_short | Modifications of phosphorus in Latosol as a function of humic acids and acidity |
| title_sort | modifications of phosphorus in latosol as a function of humic acids and acidity |
| topic | phosphate sorption humic substances |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700488&lng=en&tlng=en |
| work_keys_str_mv | AT marciahbeck modificationsofphosphorusinlatosolasafunctionofhumicacidsandacidity AT pedroavescosteguy modificationsofphosphorusinlatosolasafunctionofhumicacidsandacidity AT deborahpdick modificationsofphosphorusinlatosolasafunctionofhumicacidsandacidity |