Data/hora: 01/06/2024 00:52:09

Provedor de dados: | 90
País: | Brazil
Título: | Nitrogen Fertilization of No-Tillage Winter Cereals in the South-Central Region of Paraná, Brazil
Autores: | Fontoura,Sandra Mara Vieira; Viero,Fernando; Moraes,Renato Paulo de; Bayer,Cimélio.
Data: | 2017-01-01
Ano: | 2017
Palavras-chave: | Triticum aestivum; Hordeum vulgare L.; N indication; Urea.
Resumo: | ABSTRACT High winter cereal yields depend on an adequate supply of nitrogen (N). We developed a system for indicating N rates for wheat and barley in the South-Central region of the state of Paraná, Brazil, using results of 72 field experiments conducted from 2007 to 2012. The N rates recommended for winter cereals were estimated to supply the amounts of N fertilizer needed to obtain increasing yields (&lt;3.5, 3.5-4.5, 4.5-5.5, and &gt;5.5 Mg ha-1) of crops grown after soybean and corn on soils with a variable organic matter content (&lt;40, 40-60, and &gt;60 g dm-3). The apparent mineralization rate of soil N was estimated to be 1 % and the N fertilization efficiency 50 %. The N rates recommended for wheat ranged from 30 to 150 kg ha-1 when cultivated after soybean, and from 30 to 170 kg ha-1 after corn. The N rates for barley ranged from 30 to 120 kg ha-1 when grown after soybean, and from 30 to 130 kg ha-1 after corn. These N rates are consistent with those indicated by the Soil Fertility Commission for the states of Rio Grande do Sul and Santa Catarina (CQFS-RS/SC, 2016), and also with the rates of maximum economic efficiency estimated in our study. The proposed N rate recommendation system can be used by agricultural technicians and producers to manage N fertilization of wheat and barley in the South-Central region of Paraná, Brazil.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100533
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/18069657rbcs20170009
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.41 2017
Fonte: | info:eu-repo/semantics/openAccess