| Texto completo | |
| Autor(es): |
Boas Fonseca, Natalia Vilas
;
Cardoso, Abmael da Silva
;
Berca, Andressa Scholz
;
Dornellas, Isadora Alves
;
Ongaratto, Fernando
;
Curvelo Silva, Maria Luisa
;
Ruggieri, Ana Claudia
;
Reis, Ricardo Andrade
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | LIVESTOCK SCIENCE; v. 263, p. 6-pg., 2022-07-14. |
| Resumo | |
We evaluated the effects of different sources of nitrogen (N) applied to pastures of Urochloa brizantha cv. Marandu during the rainy season on the efficiency of N use in plants and animals. Continuous grazing with variable stocking rates was employed to maintain 25 cm pasture height, corresponding to 95% light interception. The experimental design consisted of randomized blocks with four treatments and three replications (paddocks per treatment). The applied N sources were urea, ammonium sulfate, and ammonium nitrate, at a respective dosage of 150 kg N per ha, in three treatments, in addition to a control treatment without N fertilization. N recovery by plants differed between fertilizers (p = 0.047) and was highest in the ammonium sulfate treatment. The proportion of retained N was higher in animals kept on fertilized pastures (p < 0.01). Different sources of N in pasture system, or its non-use, affected the efficiency of N use by animals, and ammonium sulfate and ammonium nitrate were more efficient with respect to the N balance. (AU) | |
| Processo FAPESP: | 19/25997-4 - Efeito dos horários e fontes de suplementação energética para otimizar a recria de tourinhos F1 Angus-Nelore |
| Beneficiário: | Andressa Scholz Berça |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| 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: | 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 |