Doses, sources and time of nitrogen application on irrigated wheat under no-tillage

• Autor(a) principal: Teixeira Filho, Marcelo Carvalho Minhoto
• Data de Publicação: 2011
• Outros Autores: Buzetti, Salatiér, Andreotti, Marcelo, Arf, Orivaldo, Benett, Cleiton Gredson Sabin
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/5601
• topic: Triticum aestivum; nitrogen fertilization; winter cereals; nitrification inhibitor; grain yield; savannah soil; Triticum aestivum; adubação nitrogenada; cereais de inverno; inibidor de nitrificação; produtividade de grãos; solo de cerrado

The objective of this work was to evaluate the effects of different doses and sources of nitrogen, applied at sowing or at side-dressing, on the yied components and grain yield of irrigated wheat, under no‑tillage. Nitrogen sources with or without the nitrification inhibitor (Entec) were used for applications at sowing or at side-dressing periods. Wheat was cultivated in Selvíria, state of Mato Grosso do Sul, Brazil in a low-altitude Cerrado region. A randomized block design was used in the factorial arrangement 5x3x2, with four replicates. Treatments consisted of the combination of: five N doses, 0, 50, 100, 150 and 200 kg ha-1; three sources, Entec, ammonium sulfate, and urea; and two application times, at sowing, near of the lines, or at side‑dressing. The different N sources had similar influence on plants height and grain yield of irrigated wheat. Nitrogen applications, totally at sowing and in the traditional way, at sowing and at side-dressing, are both equally viable. The increment of the N doses up to 121.5 kg ha-1 increases the grain yield, independently of application time and N source.