Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress
ABSTRACT The aim of this study was to evaluate the accumulation of salts in the soil from irrigation water and of N and K from fertilization. The experiment was conducted in PVC columns (20 cm in diameter and 100 cm in height), filled with non-saline soil, and cultivated with maize. A completely ran...
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Universidade Federal de Campina Grande
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| author | Claudivan F. de Lacerda Jorge F. da S. Ferreira Donald L. Suarez Emanuel D. Freitas Xuan Liu Aureliano de A. Ribeiro |
| author_facet | Claudivan F. de Lacerda Jorge F. da S. Ferreira Donald L. Suarez Emanuel D. Freitas Xuan Liu Aureliano de A. Ribeiro |
| author_sort | Claudivan F. de Lacerda |
| collection | DOAJ |
| description | ABSTRACT The aim of this study was to evaluate the accumulation of salts in the soil from irrigation water and of N and K from fertilization. The experiment was conducted in PVC columns (20 cm in diameter and 100 cm in height), filled with non-saline soil, and cultivated with maize. A completely randomized block design in a 4 x 4 factorial was used, with four levels of salinity (0.5, 2.5, 5.0 and 7.5 dS m-1), four N rates, and five replicates. Nitrogen was applied as urea and potassium nitrate at the following rates: N1: N recommendation for maize (2.6 g column-1); N2: 0.3 times (0.78 g column-1) the recommended N1 dose; N3 and N4 with N based on N1 and N2 doses, respectively, reduced proportionally based on the evapotranspiration reduction caused by salinity. After 74 days from sowing, root and soil samples were collected at different soil depths. The electrical conductivity of the saturated extract (ECe) and the concentration of ions (Ca2+, Na+, and Cl-) increased as a function of salinity and soil depth. The opposite was observed for the root system. The increase in salinity also resulted in K+ and NO3- accumulation in the soil column, mainly in treatments with higher N rates (N1 and N3). At the end of the experiment, 88% of the NO3- applied at the highest salinity treatment (7.5 dS m-1) and the highest N rate (N1) was below 20 cm soil depth, evidencing a N loss process caused by leaching. |
| format | Article |
| id | doaj-art-73bb644c0e7040db9a6854b1a9ce3a71 |
| institution | OA Journals |
| issn | 1807-1929 |
| language | English |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-73bb644c0e7040db9a6854b1a9ce3a712025-08-20T02:25:54ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-192922855355710.1590/1807-1929/agriambi.v22n8p553-557S1415-43662018000800553Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stressClaudivan F. de LacerdaJorge F. da S. FerreiraDonald L. SuarezEmanuel D. FreitasXuan LiuAureliano de A. RibeiroABSTRACT The aim of this study was to evaluate the accumulation of salts in the soil from irrigation water and of N and K from fertilization. The experiment was conducted in PVC columns (20 cm in diameter and 100 cm in height), filled with non-saline soil, and cultivated with maize. A completely randomized block design in a 4 x 4 factorial was used, with four levels of salinity (0.5, 2.5, 5.0 and 7.5 dS m-1), four N rates, and five replicates. Nitrogen was applied as urea and potassium nitrate at the following rates: N1: N recommendation for maize (2.6 g column-1); N2: 0.3 times (0.78 g column-1) the recommended N1 dose; N3 and N4 with N based on N1 and N2 doses, respectively, reduced proportionally based on the evapotranspiration reduction caused by salinity. After 74 days from sowing, root and soil samples were collected at different soil depths. The electrical conductivity of the saturated extract (ECe) and the concentration of ions (Ca2+, Na+, and Cl-) increased as a function of salinity and soil depth. The opposite was observed for the root system. The increase in salinity also resulted in K+ and NO3- accumulation in the soil column, mainly in treatments with higher N rates (N1 and N3). At the end of the experiment, 88% of the NO3- applied at the highest salinity treatment (7.5 dS m-1) and the highest N rate (N1) was below 20 cm soil depth, evidencing a N loss process caused by leaching.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800553&lng=en&tlng=ensalinidadenitratolixiviação de nutrientes |
| spellingShingle | Claudivan F. de Lacerda Jorge F. da S. Ferreira Donald L. Suarez Emanuel D. Freitas Xuan Liu Aureliano de A. Ribeiro Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress Revista Brasileira de Engenharia Agrícola e Ambiental salinidade nitrato lixiviação de nutrientes |
| title | Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| title_full | Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| title_fullStr | Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| title_full_unstemmed | Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| title_short | Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| title_sort | evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress |
| topic | salinidade nitrato lixiviação de nutrientes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800553&lng=en&tlng=en |
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