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

Chemical characteristics of fruits of two species of Physalis under nitrogen fertilization

BERTONCELLI, Douglas Junior
  • BERTONCELLI, Douglas Junior
  • Universidade Estadual de Londrina (UEL), Brasil.
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OLIVEIRA, Marisa de Cacia
  • OLIVEIRA, Marisa de Cacia
  • Universidade Tecnológica Federal do Paraná, Brasil
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BOLINA, Cristiane de Oliveira
  • BOLINA, Cristiane de Oliveira
  • Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Brasil
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PASSOS, Amanda Izabel dos
  • PASSOS, Amanda Izabel dos
  • Universidade Tecnológica Federal do Paraná, Brasil
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ARIATI, Ana Claudia
  • ARIATI, Ana Claudia
  • Universidade Tecnológica Federal do Paraná, Brasil
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ORTOLAN Alexandre Osmar
  • ORTOLAN Alexandre Osmar
  • Universidade Tecnológica Federal do Paraná, Brasil
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  •  Received: 22 March 2016
  •  Accepted: 19 April 2016
  •  Published: 19 May 2016

Abstract

Although small fruits, with some exceptions, are not yet as popular in Brazil, some farmers have invested in this market and the genus Physalis can be an important alternative source of income due to its high added value and possibility of cultivation in small areas. To date, there are no specific fertilizer recommendations for even the most cultivated species (Physalis peruviana) and therefore the goal of this study was to evaluate the effects of nitrogen fertilization on quality of fruits of Physalis peruviana and Physalis pubescens. Plants were grown in 5 L pots containing soil and maintained in a controlled environment, in greenhouse. Treatments consisted of five N levels (kg ha-1): 0, 200, 250, 300 and 350, with seven replicates per treatment. Variables evaluated were total soluble sugars and reducing sugars, phenolics, pH, titratable acidity and fruit diameter.  Nitrogen increased soluble sugars (350 kg ha-1) and reducing sugars (300 kg ha-1), mainly in P. pubescens. There was a slight increase of juice pH, but concentrations of total phenols and citric acid decreased with increasing levels of N. Fruit diameter of the two species of Physalis was increased by N fertilization, and the best N level was 300 kg ha-1.

Key words: Physalis peruviana, Physalis pubescens, reducing sugars, titratable acidity, total phenolics.