| Full text | |
| Author(s): Show less - |
Galindo, Fernando Shintate
[1]
;
da Silva, Edson Cabral
[2]
;
Pagliari, Paulo Humberto
[3, 4]
;
Fernandes, Guilherme Carlos
[1]
;
Rodrigues, Willian Lima
[1]
;
Campos Biagini, Antonio Leonardo
[1]
;
Baratella, Eduardo Bianchi
[1]
;
da Silva Junior, Castro Alves
[1]
;
Moretti Neto, Mario Joao
[1]
;
Muraoka, Takashi
[3, 4]
;
Minhoto Teixeira Filho, Marcelo Carvalho
[1]
Total Authors: 11
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Coll Engn, Dept Plant Hlth Rural Engn & Soils, Ave Brasil 56, BR-15385000 Ilha Solteira, SP - Brazil
[2] Goiano Fed Inst, Rio Verde Campus, BR-75901970 Rio Verde, Go - Brazil
[3] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, SP - Brazil
[4] Univ Minnesota, Southwest Res & Outreach Ctr, Dept Soil Water & Climate, Lamberton, MN 56152 - USA
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | NUTRIENT CYCLING IN AGROECOSYSTEMS; v. 119, n. 3 JAN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Stable isotopes (e.g., N-15) can be used to develop best practices for fertilizer management in cereal crops under tropical conditions. The objectives of this study were to determine the N contribution from fertilizer and soil to wheat and corn grown in rotation and the residual N contribution from fertilizer applied to wheat and carried over to corn under Brazilian savannah conditions. This study was established in a no-till system on Rhodic Haplustox soil in a randomized complete block design with four replications. The N treatments applied to the wheat crops were 0, 20, 40, 60, 80 and 160 kg (urea-N-15) ha(-1). The residual effects of N on the succeeding corn crop were evaluated. During the corn phase, two additional treatments were included: a control (0 N) and a treatment with 160 kg N ha(-1). Regression analysis showed that the highest estimated wheat yield (5415 kg ha(-1)) was observed with the application of 114 kg N ha(-1). Significant effects from the residual N were observed in the corn shoot biomass and straw N uptake. On average, the recovery rate of the urea N fertilizer was 34% for wheat, and the residual urea N fertilizer use in corn (when applied to wheat) was less than 5% of the amount initially applied. The effect of the residual N was not enough to meet the N demands of the succeeding corn crop. The results of this study provide producers and the scientific community with good estimates of nitrogen use efficiency for wheat and corn. (AU) | |
| FAPESP's process: | 18/08485-7 - Nitrogen management in cowpea bean, wheat and corn: effects on plant nutrition, grain yield, and nitrogen use efficiency |
| Grantee: | Fernando Shintate Galindo |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |