Título:	Nitrogen fertilization management in no-tillage maize with different witer crops.
Autoria:	COUTINHO NETO, A. M. COUTINHO, E. L. M. ORIOLI JÚNIOR, V. CORÁ, J. E. SILVA, A. R. B. e SCATOLIN, M.
Afiliação:	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.
Ano de publicação:	2013
Referência:	Bioscience Journal, Uberlândia, v. 29, n. 6, p. 1981-1988, Nov./Dec. 2013.
Conteúdo:	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.
Thesagro:	Manejo Milho Plantio Direto
Palavras-chave:	Adubação nitrogenada
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPATU)