African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Production of sunflower under saline water irrigation and nitrogen fertilization

João Batista dos Santos*
  • João Batista dos Santos*
  • Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, Paraíba, Brazil
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Cruz Ramón Marenco Centeno
  • Cruz Ramón Marenco Centeno
  • Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, Paraíba, Brazil
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Carlos Alberto Vieira de Azevedo
  • Carlos Alberto Vieira de Azevedo
  • Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, Paraíba, Brazil
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Hans Raj Gheyi
  • Hans Raj Gheyi
  • Nucleus for Soil and Water Engineering, Federal University of Recôncavo of Bahia, Cruz das Almas, CEP 44.380-000, Bahia, Brazil
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Geovani Soares de Lima
  • Geovani Soares de Lima
  • Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, Paraíba, Brazil
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Lourival Ferreira Cavalcante
  • Lourival Ferreira Cavalcante
  • Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, Paraíba, Brazil
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Manassés Mesquita da Silva
  • Manassés Mesquita da Silva
  • Department of Agricultural Engineering, Federal Rural University of Pernambuco, Recife, CEP 52.171-900, Pernambuco, Brazil
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  •  Received: 04 January 2016
  •  Accepted: 17 March 2016
  •  Published: 28 April 2016

Abstract

The aim of the present study was to evaluate the  production components of  sunflower Embrapa 122-V2000, as a function of irrigation water salinity and nitrogen doses. The experiment was conducted in plastic pots with a capacity of 100 L under greenhouse conditions in Federal University of Campina Grande, during the period of April-July 2012, in an experimental design adopting factorial arrangement of 5 x 5, with five levels of irrigation water salinity, expressed by electrical conductivity of 0.7, 1.7, 2.7, 3.7 and 4.7 dS m-1 (25°C) and five nitrogen rates of 50, 75, 100, 125 and 150 mg N kg-1 soil, with three repetitions, totaling 75 experimental units. The evaluated parameters were: total number of achenes, percentage of viable achenes, percentage of biomass of viable achenes, the biomass and diameter of chapter, dry weight of 1000 seeds and production of achenes. Although, the interaction of water salinity and nitrogen levels did not show significant effects on the components of production, increase in the salt content of the water inhibited all the variables while elevation of nitrogen rates stimulated emission of achenes, chapter biomass and production of achenes.

Key words: Marginal quality water, productivity, Hellianthus annus L.