| Texto completo | |
| Autor(es): |
de Castro, Sergio Gustavo Quassi
;
Costa, Vladimir Eliodoro
;
de Castro, Saulo Augusto Quassi
;
Carvalho, Joao Luis Nunes
;
Borges, Clovis Daniel
;
de Castro, Rosilaine Araldi
;
Kolln, Oriel Tiago
;
Franco, Henrique Coutinho Junqueira
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION; v. 24, n. 2, p. 14-pg., 2024-04-25. |
| Resumo | |
Purpose Nitrogen fertilizer management is an important agricultural tool that must be optimized to promote sustainable practices since the nitrogen-fertilizer recovery by plants (NRP) is low, leading to nitrogen losses to the environment. In sugarcane, N-fertilization has been investigated over the years but little attention has been given to N-fertilizer application methods. Sugarcane crop production and environmental impact regarding N-fertilizer application methods (i.e., applied onto the sugarcane straw layer and incorporated into the soil) were investigated in the present study aiming to achieve an environmental-friendly cropping system. Methods Sugarcane yield and NRP, N2O emissions, relevant components of the soil microbiological community and N-fertilizer retention in soil layers were quantified. The experiment was carried out in field conditions where N-fertilizer application methods using N-15-labelled ammonium nitrate ((NH4)-N-15 (NO3)-N-15) were compared to a control treatment with no N-fertilization. Results Incorporation of N-fertilizer into the soil increased the sugarcane yield by 17% (two-year average) compared to N-fertilizer applied onto the sugarcane straw layer, which was similar to control treatment. There was an increase in NRP-fertilizer of 79% due to the application of N-fertilizer incorporated into the soil. Furthermore, soil incorporation of N-fertilizer decreased N2O emission by 22% with the fertilizer N emission factor reduced four-fold. The N2O emissions were mostly associated with ammonium-oxidizing bacteria (AOB). Conclusions Our results show that application of N-fertilizer incorporated into the soil is an environmental-friendly N-fertilization management which will improve agricultural sustainability and reduce environmental impacts. (AU) | |
| Processo FAPESP: | 17/25489-3 - Uso do nitrogênio (15N) pela cana-de-açúcar submetida à adubação nitrogenada com "spray foliar" (N-Ureia) como complemento à aplicação do nutriente no solo |
| Beneficiário: | Saulo Augusto Quassi de Castro |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 17/13619-0 - Balanço de nitrogênio (N) em cana-de-açúcar relacionado a formas de aplicação do N-fertilizante e perdas por emissões de N2O, lixiviação e escoamento superficial |
| Beneficiário: | Sérgio Gustavo Quassi de Castro |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Regular |