| Título: | Nitrogen fertilization management in no-tillage maize with different witer crops. |
| Autores: |
COUTINHO NETO, A. M. COUTINHO, E. L. M. ORIOLI JÚNIOR, V. CORÁ, J. E. SILVA, A. R. B. e SCATOLIN, M. |
| Fecha: |
2013 2013-12-05 |
| Publicador: | Repositório Acesso Livre à Informação Científica da Embrapa (ALICE) |
| Fuente: | |
| Tipo: | Artigo em periódico indexado (ALICE) |
| Tema: |
Adubação nitrogenada Manejo Milho Plantio direto |
| Descripción: |
The nitrogen (N) utilization by maize grown in a no-tillage system is dependent on the quality of the preceding crop residues, which may promote differences in N fertilization efficiency with respect to time. Thus, the purpose of this study was to evaluate the nutritional state, dry matter production and grain yield of maize grown in a clayey soil (Typic Acrustox) under a no-tillage system. The split-plot experimental design was set up in randomized complete blocks with three replications, in which the main plot was treated with different N application strategies and the split-plots were planted with winter crops (soybean and maize). The fertilizer strategies (rate: 120 kg ha-1 of N) used were as follows: (0 ? 0), (20 ? 100), (60 ? 60), (120 ? 0) and (0 ? 120), with the first number corresponding to the rate of N (kg ha-1) applied before planting and the second number corresponding to the top dressing rate (V4-5 stage). Nitrogen fertilization raised the N content (in shoots and leaves) and maize yield (in the shoot dry matter and grain). The maize grown after soybean had both greater N concentrations and production (dry matter and grain) relative to the maize grown after maize. Applying 120 kg ha-1 N did not significantly affect the evaluated variables, regardless of the winter crop. 2013 |
| Idioma: | en |