| Texto completo | |
| Autor(es): |
Garcia, Pedro Lopes
[1]
;
Sermarini, Renata Alcarde
[2]
;
Ana Filho, Carlos Roberto de Sant
[3]
;
Bendassolli, Jose Albertino
[1]
;
Boschiero, Beatriz Nastaro
[1]
;
Trivelin, Paulo Cesar Ocheuze
[1]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, Stable Isotopes Lab, BR-13416000 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Exact Sci Dept, BR-13418900 Piracicaba, SP - Brazil
[3] Compass Minerals Plant Nutr, Innovat Ctr, BR-13495000 Iracemapolis, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | AGRONOMY-BASEL; v. 10, n. 12 DEC 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
A single application of polymer-sulfur coated urea (PSCU) and conventional urea (U) is expected to ensure nitrogen (N) throughout the maize (Zea mays L.) growth cycle being U the likely main N-fertilizer supplier at the beginning and PSCU during the maize growth cycle. This research aimed to evaluate N fertilization management (split, incorporated, and broadcast application) and fertilizer blends (30%PSCU + 70%U and 70%PSCU + 30%U) on volatilization of ammonia (AV) and soil N mineral content (NM); plant N uptake (NU) and N-15-fertilizer recovery (NR); and yield (GY). Field experiments were conducted for two growing seasons (2017-2018 and 2019-2020) in Rhodic Eutrustox soil. U was treated with NBPT (N-(n-butyl) thiophosphoric triamide). N rate was 180 kg ha(-1). AV reached 12% of the applied N (broadcast-applied 70%PSCU + 30%U, 2017-2018). The 30%PSCU + 70%U application resulted in higher NM at 40-60 cm depth in vegetative and reproductive stages in both seasons. The 70%PSCU + 30%U application resulted in the highest GY in 2017-2018, and the N treatments did not affect GY in 2019-2020. NR was 3% on average at vegetative leaf stage 4 (V4), and PSCU, the main N-fertilizer supplier applying 70%PSCU + 30%U. After V4, the main N-fertilizer supplier is PSCU for 70%PSCU + 30%U and U for 30%PSCU + 70%U application. These blends (incorporated, broadcast, and split application) can ensure N during the maize growth cycle, with NR of 72.5% at maturity (R6) being 47.9% in the grain. (AU) | |
| Processo FAPESP: | 17/25813-5 - Eficiência de uso de nitrogênio (15N) em manejos de adubação de milho e feijão com o uso de misturas de uréia revestida com enxofre e polímero e uréia convencional |
| Beneficiário: | Pedro Lopes Garcia |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 17/24516-7 - Manejos especiais da adubação nitrogenada em cultivos de cana-açúcar, milho e feijoeiro visando aumento na eficiência de uso de N e da produtividade agrícola |
| Beneficiário: | Paulo Cesar Ocheuze Trivelin |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |