Data/hora: 11/06/2024 01:08:46

Provedor de dados: | 52
País: | Brazil
Título: | Monitoring and evaluation of need for nitrogen fertilizer topdressing for maize leaf chlorophyll readings and the relationship with grain yield
Autores: | Silva,Maria Anita Gonçalves da; Muniz,Antonio Saraiva; Mannigel,Anny Rosi; Porto,Simone Maria Altoé; Marchetti,Marlene Estevão; Nolla,Antonio; Grannemann,Ivan.
Data: | 2011-08-01
Ano: | 2011
Palavras-chave: | Nitrogen fertilized; Leaf chlorophyll; Crop rotation; No till; Zea mays; Triticum aestivum.
Resumo: | The study was carried out for two years in maize in succession to the wheat using no tillage system in a distroferric Red Latosol (Hapludox). Methods of management nitrogen fertilizer (120 kg ha-1) with ammonium sulphate were studied; the fertilizer was applied in maize sowing or in maize topdressing, and N with previous application in wheat sowing. In addition, leaf chlorophyll reading was used as an indicator for the need for topdressed nitrogen fertilizer. Nitrogen supply index (NSI) was shown to be effective at predicting need for topdressed nitrogen fertilizer for maize. The application of N improved the yield of the maize independent of the management system. The flowering stage was carried out at the appropriate time in order to estimate the nitrogen nutrition state and yield of maize using the relative chlorophyll level (RIC).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400004
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132011000400004
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.54 n.4 2011
Fonte: | info:eu-repo/semantics/openAccess