Effects of top-dressing nitrogen levels on the productivity of cauliflower

Autores

  • Fabricio Correia de Oliveira Universidade de São Paulo/Escola Superior de Agricultura "Luiz de Queiroz"
  • Alexsandro Claudio dos Santos Almeida Universidade Federal da Grande Dourados
  • Luciano Oliveira Geisenhoff Universidade Federal da Grande Dourados
  • Joaquim Alves de Lima Junior Universidade Federal Rural da Amazonia
  • Amilcar Isidro Servin Niz Universidade Federal da Grande Dourados

DOI:

https://doi.org/10.15361/1984-5529.2017v45n2p190-196

Palavras-chave:

Parcel fertilization, Brassica oleracea, mineral nutrition, production of vegetables.

Resumo

Nitrogen (N) is the most used element by plants and its level should be balanced in order to provide a maximum productivity without decreasing plant quality. This study aimed to analyze the effects of nitrogen levels on the cultivation of cauliflower grown in the region of Great Dourados, Mato Grosso do Sul (MS) state. A field experi­ment was conducted using randomized blocks with four treatments (corresponding to N levels of 0, 150, 300 and 450 kg ha-1) and five replications. The genotype of cauliflower cultivated was hybrid ‘Verona’. Inflorescence diameter (ID), inflorescence mass (IM), commercial productivity of the inflorescence (CPI) and percentage of flo­rets per inflorescence (PFI) were evaluated. The parameters were adjusted by quadratic equations. Levels that maximized the diameter, the mass and the inflorescence productivity were 225.0, 252.5 and 252.5 kg ha-1 of top-dressing nitrogen, respectively.

Biografia do Autor

Alexsandro Claudio dos Santos Almeida, Universidade Federal da Grande Dourados

Faculdade de Ciência Agrária

Luciano Oliveira Geisenhoff, Universidade Federal da Grande Dourados

Faculdade de Ciências Agrárias

Joaquim Alves de Lima Junior, Universidade Federal Rural da Amazonia

Campus Capanema

Amilcar Isidro Servin Niz, Universidade Federal da Grande Dourados

Faculdade de Ciências Agrárias

Arquivos adicionais

Publicado

07/04/2017

Edição

Seção

Solos e Nutrição de Plantas - Soils and Plant Nutrition