African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Growth and gas exchange of okra under irrigation, organic fertilization and cover of soil

Antonio Michael Pereira Bertino
  • Antonio Michael Pereira Bertino
  • Universidade Federal da Paraiba, Brazil.
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Evandro Franklin de Mesquita
  • Evandro Franklin de Mesquita
  • Universidade Estadual da Paraiba Brazil.
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Francisco Vanies Da Silva Sa
  • Francisco Vanies Da Silva Sa
  • Universidade Federal Rural do Semi-Arido, Brazil.
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Lourival Ferreira Cavalcante
  • Lourival Ferreira Cavalcante
  • Universidade Federal da Paraiba, Brazil.
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Nubia Marisa Ferreira
  • Nubia Marisa Ferreira
  • Universidade Federal da Paraiba, Brazil.
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Emanoela Pereira de Paiva
  • Emanoela Pereira de Paiva
  • Universidade Federal Rural do Semi-Arido, Brazil.
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Marcos Eric Barbosa Brito
  • Marcos Eric Barbosa Brito
  • Universidade Federal de Campina Grande Brazil
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Antonio Missiemario Pereira Bertino
  • Antonio Missiemario Pereira Bertino
  • Universidade Federal da Paraiba, Brazil.
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  •  Received: 24 April 2015
  •  Accepted: 12 August 2015
  •  Published: 01 October 2015

Abstract

The objective was to evaluate leaf area and gas exchange of okra plants for different irrigation depths, organic matter content and mulch. The activities were conducted in an experimental area of the State University of Paraíba, Campus IV, Catolé do Rocha-PB. An experimental design with randomized blocks, treatments distributed in a factorial 2 × 5 × 2 related to two irrigation levels, 100 and 50% of crop evapotranspiration (ETc), five levels of organic matter in the soil (1.8, 2.8, 3.8, 4.8 and 5.8%) and soil with and without mulch, totaling 20 treatments replicated in four blocks, was used. The experimental unit consisted of 27 plants. The increase of soil organic matter stimulated growth in leaf area and the gas exchange of okra plants. The irrigation with the smallest depth of water inhibited the expansion of leaf area, but provided a greater efficiency in okra's gas exchange. Mulch alleviated the reduced effects of irrigation water depth and stimulated the activity of okra gas exchanges.

 

Key words: Abelmoschus esculentus, physiology, leaf area.