Comparing nitrate-N losses through leaching by field measurements and nitrogen balance estimations.
Nitrogen (N) balance method is a valuable tool for estimating N losses. However, this technique could lead to incorrect estimates of the amount of nitrate (NO3 −N) leaching if processes relevant to N losses are not considered properly. The aim of this study was to compare NO3 −-N leaching losses est...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/46716 |
| Acceso en línea: | http://hdl.handle.net/11336/46716 |
| Access Level: | acceso abierto |
| Palabra clave: | Nitrogen Nutrient Cycling Water Quality https://purl.org/becyt/ford/4.1 https://purl.org/becyt/ford/4 |
| Sumario: | Nitrogen (N) balance method is a valuable tool for estimating N losses. However, this technique could lead to incorrect estimates of the amount of nitrate (NO3 −N) leaching if processes relevant to N losses are not considered properly. The aim of this study was to compare NO3 −-N leaching losses estimated using an N balance (nonrecovered N, Nne) with data of NO3 −-N leaching losses (Nl). The experiment was made on a Typic Argiudoll soil planted with corn (five growing seasons) under 0, 100, and 200 kg N ha−1. The ceramic soil-water suction samplers were installed (1 m deep). Drainage was estimated by the LEACH-W model. The greatest overestimation with the N balance method occurred for years with annual rainfall below the historical average and at times of high NO3 −-N availability. Future research should focus on investigating mechanisms of N losses relevant under limited water availability. |
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