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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
28/08/2024 |
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Data da última atualização: |
28/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LONGHINI, V. Z.; ÍTAVO, L. C.; GURGEL, A, L. C.; CARDOSO, A. da S.; BODDEY, R. M.; V, G. dos S.; DIAS, A. M. |
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Afiliação: |
VANESSA ZIRONDI LONGHINI, UNIVERSIDADE FEDERAL DO MATO GROSSO DO SU; LUÍS CARLOS VINHAS ÍTAVO, UNIVERSIDADE FEDERAL DO MATO GROSSO DO SUL; ANTONIO LEANDRO CHAVES GURGEL, UNIVERSIDADE FEDERAL DO PIAUÍ; ABMAEL DA SILVA CARDOSO, UNIVERSITY OF FLORIDA; ROBERT MICHAEL BODDEY, CNPAB; GELSON DOS SANTOS DIFANTE, UNIVERSIDADE FEDERAL DO MATO GROSSO DO SUL; ALEXANDRE MENEZES DIAS, UNIVERSIDADE FEDERAL DO MATO GROSSO DO SUL. |
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Título: |
Mathematical models for adjustments in the quantification of ammonia volatilization from urea fertilizer applied on tropical pastures. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Ciência Rural, v. 54, n. 5, cr20230230, May 2024. |
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ISSN: |
1678-4596 |
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DOI: |
https://doi.org/10.1590/0103-8478cr20230230 |
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Idioma: |
Inglês |
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Notas: |
Título em Português: odelos matemáticos para ajustes na quantificação da volatilização de amônia do fertilizante ureia aplicado em pastagens tropicais |
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Conteúdo: |
In Brazil, urea is the most used nitrogen (N) fertilizer to improve forage production. However, their excessive use can cause environmental impacts through N losses, such as ammonia (NH3) volatilization. Therefore, the current study adjusted and estimated the NH3 volatilization from urea applied on tropical pastures in three rainfall conditions using mathematical models. Data were collected from Marandu grass (Brachiaria brizantha) fertilized with 50 kg N ha-1 during wet, intermediate, and dry conditions. Ammonia volatilization was measured in five semi-open chambers for 21 days. The linear, quadratic, exponential, Gompertz, Groot, and Richards models were tested for fitting and estimating the NH3 volatilization. The Gompertz, Groot, and Richards models generated predictions similar to the observed data, with a high determination coefficient, indicating a better fit of these equations to data, with precision and accuracy. However, the Groot model was selected due to the lowest root mean square error of prediction (0.29 % total N lost as NH3). The greatest N loss as NH3 volatilization occurred in the wet, followed by intermediate and dry conditions (20.2, 17.0, and 11.3 % total N lost as NH3, respectively). Therefore, nitrogen losses as NH3 volatilization after application of 50 kg N ha-1, as urea source, are altered according to the weather conditions, reaching 20% of N added in the wet rainfall period. The Groot model is recommended for fitting and estimating the NH3 volatilization from urea applied on Marandu grass pastures in the wet and dry rainfall conditions. MenosIn Brazil, urea is the most used nitrogen (N) fertilizer to improve forage production. However, their excessive use can cause environmental impacts through N losses, such as ammonia (NH3) volatilization. Therefore, the current study adjusted and estimated the NH3 volatilization from urea applied on tropical pastures in three rainfall conditions using mathematical models. Data were collected from Marandu grass (Brachiaria brizantha) fertilized with 50 kg N ha-1 during wet, intermediate, and dry conditions. Ammonia volatilization was measured in five semi-open chambers for 21 days. The linear, quadratic, exponential, Gompertz, Groot, and Richards models were tested for fitting and estimating the NH3 volatilization. The Gompertz, Groot, and Richards models generated predictions similar to the observed data, with a high determination coefficient, indicating a better fit of these equations to data, with precision and accuracy. However, the Groot model was selected due to the lowest root mean square error of prediction (0.29 % total N lost as NH3). The greatest N loss as NH3 volatilization occurred in the wet, followed by intermediate and dry conditions (20.2, 17.0, and 11.3 % total N lost as NH3, respectively). Therefore, nitrogen losses as NH3 volatilization after application of 50 kg N ha-1, as urea source, are altered according to the weather conditions, reaching 20% of N added in the wet rainfall period. The Groot model is recommended for fitting and estimating the NH3 volati... Mostrar Tudo |
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Palavras-Chave: |
Marandu grass; Synthetic fertilizer. |
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Thesaurus Nal: |
Ammonia; Mathematical models; Tropical pastures; Urea; Volatilization. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 8 | |
| 3. |  | VILELA, H.; SANTOS, E. J.; VALENTE, J. de O.; VILELA, D. Desempenho de novilhos mestiços (Holandês-Zebu) em pastagens de gramínea e leguminosas, suplementadas com uréia e minerais, durante o período da seca. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 35, n. 2, p. 197-204, 1983.| Biblioteca(s): Embrapa Gado de Leite. |
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| 8. | | VIANA, A. C.; MIRANDA, J. E. de; FERREIRA, J. J.; CRUZ, J. C.; DUARTE, J. de O.; VALENTE, J. de O. Avaliação de cultivares de milho e sorgo para a produção de silagem. In: CONGRESSO NACIONAL DE MILHO E SORGO, 21., 1996, Londrina. Resumos... Londrina: IAPAR, 1996. p. 11.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 8 | |
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