mmonia Volatilization, Forage Accumulation, and Nutritive Value of Marandu Palisade Grass Pastures in Different N Sources and Dose

Autor(es)

da Cruz Correa, Darlena Caroline ^[1] ; Cardoso, Abmael da Silva ^[1] ; Ferreira, Mariane Rodrigues ^[1] ; Siniscalchi, Debora ^[1] ; de Almeida Goncalves, Pedro Henrique ^[1] ; Lumasini, Rodolfo Nussio ^[1] ; Reis, Ricardo Andrade ^[1] ; Ruggieri, Ana Claudia ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Sch Agr & Veterinarian Sci, Dept Anim Sci, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ATMOSPHERE; v. 12, n. 9 SEP 2021.
• Citações Web of Science: 0

Resumo

The reduction in ammonia (NH3) losses from volatilization has significant implications in forage production. The objective of this study was to evaluate the impact of N fertilizers (urea, ammonium nitrate, and ammonium sulfate) and four doses (0, 90, 180 and 270 kg N ha(-1)) on N losses by NH3 volatilization, accumulation, and forage chemical composition of Urochloa brizantha cv Marandu. Two field experiments were conducted to measure NH3 losses using semi-open chambers. The forage accumulation and chemical composition were evaluated in the third experiment; the response variables included forage accumulation, crude protein (CP), and neutral detergent fiber (NDF). Compared to urea, ammonium nitrate and ammonium sulfate reduced NH3 losses by 84% and 87% and increased total forage accumulation by 14% and 23%, respectively. Forage accumulation rate and CP increased linearly with the N levels, while NDF contents decreased linearly with the N levels. In both experiments, NH3 losses and forage characteristics were different according to the rainfall pattern and temperature variations. Our results indicate that the use of nitric and ammoniacal fertilizers and the application of fertilizer in the rainy season constitute an efficient fertilizer management strategy to increase forage yield and decrease losses from volatilization of NH3. (AU)

• Processo FAPESP: 15/16631-5 - Estratégias de manejo para redução de impactos ambientais em sistemas de produção de bovinos de corte
• Beneficiário: Ricardo Andrade Reis
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 17/11274-5 - Decomposição de serrapilheira e emissão de gases de efeito estufa em pastos de Brachiaria adubados com doses crescentes de nitrogênio
• Beneficiário: Abmael da Silva Cardoso
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/20279-0 - Emissão de gases de efeito estufa de excretas bovinas de forrageiras C3 e gramíneas C4 em pastos tropicais
• Beneficiário: Rodolfo Nussio Lumasini
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 17/02914-0 - Perdas de nitrogênio em pastos de braquiária adubados com doses crescentes de nitrogênio
• Beneficiário: Débora Siniscalchi
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico