African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Water use efficiency and growth variables of Operculina macrocarpa L. Urban grown in tropical environment

Vicente de Paulo R. da Silva
  • Vicente de Paulo R. da Silva
  • Unidade Acadêmica Ciências Atmosféricas, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bodocongó, CEP: 58 109 970, Campina Grande, Paraíba, Brazil.
  • Google Scholar
Ricardo Pereira Veras
  • Ricardo Pereira Veras
  • Unidade Acadêmica Ciências Atmosféricas, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bodocongó, CEP: 58 109 970, Campina Grande, Paraíba, Brazil.
  • Google Scholar
José Dantas Neto
  • José Dantas Neto
  • Unidade Acadêmica Engenharia Agrícola, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bodocongó, CEP: 58 109 970, Campina Grande, Paraíba, Brazil.
  • Google Scholar
Célia Campos Braga
  • Célia Campos Braga
  • Unidade Acadêmica Ciências Atmosféricas, Universidade Federal de Campina Grande, Av. Aprígio Veloso, 882, Bodocongó, CEP: 58 109 970, Campina Grande, Paraíba, Brazil.
  • Google Scholar
Romildo Morant de Holanda
  • Romildo Morant de Holanda
  • Federal University Rural of Pernambuco, UFRPE, Recife, Pernambuco, Brazil.
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João Hugo Baracuy da Cunha Campos
  • João Hugo Baracuy da Cunha Campos
  • Estadual University of Paraíba, Campina Grande, Paraíba, Brazil.
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  •  Received: 07 July 2016
  •  Accepted: 28 September 2016
  •  Published: 13 October 2016

Abstract

Most of the population in developing countries still uses medicinal plants as the main source to meet their medical needs. Field experiments were carried out at tropical environment in Brazil in order to determine the main characteristics of ‘batata-de-purga’ (Operculina macrocarpa L. Urban), cultivated under 5 different levels of irrigation. The crop was cultivated with and without shading, using a plastic cover. The irrigation treatments were based on reference evapotranspiration (ETo): T1 = 25% ETo; T2 = 50% ETo; T3 = 75% ETo; T4 = 100% ETo; and T5= 125% ETo. Irrigation was performed in interval of three days and the applied water volume was based on treatment T4. The daily values of ETo were determined according to the method of Penman-Monteith. The results indicated that the growth variables of ‘batata-de-purga’ production components were strongly influenced by both the applied water levels and the cultivation conditions.

Key words: Evapotranspiration, irrigation water use efficiency, yield.