Nitrogen fertilization management in no-tillage maize with different witer crops
| Autor: | COUTINHO NETO, A. M., COUTINHO, E. L. M., ORIOLI JÚNIOR, V., CORÁ, J. E., SILVA, A. R. B. e, SCATOLIN, M. |
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| Přispěvatelé: | André Mendes COUTINHO NETO, GRADUANDO UNESP, Edson Luiz Mendes COUTINHO, UNESP, Valdeci ORIOLI JÚNIOR, IFTM, José Eduardo CORÁ, UNESP, ALYSSON ROBERTO BAIZI E SILVA, CPATU, Marcelo SCATOLIN, UNESP. |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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