African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Effect of potassium doses fertirrigated in the nutritional contents of tomato fruit and leaves in their early development

Luiz Henrique Campos De Almeida
  • Luiz Henrique Campos De Almeida
  • Universidade Estadual de Londrina, Brazil
  • Google Scholar
Eli Carlos de Oliveira
  • Eli Carlos de Oliveira
  • Universidade Estadual de Londrina, Brazil
  • Google Scholar
Mônica Mariana Jorge Fratoni
  • Mônica Mariana Jorge Fratoni
  • Universidade Estadual de Londrina, Brazil
  • Google Scholar
Gustavo Adolfo de Freitas Fregonezi
  • Gustavo Adolfo de Freitas Fregonezi
  • Universidade Estadual de Londrina, Brazil
  • Google Scholar
Hideaki Wilson Takahashi
  • Hideaki Wilson Takahashi
  • Universidade Estadual de Londrina, Brazil
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  •  Received: 08 June 2015
  •  Accepted: 21 August 2015
  •  Published: 19 November 2015

Abstract

Tomato is the most commonly consumed and marketed vegetables in the world and one of the plants that respond more to fertilization, and particularly in demanding potassium, which is responsible for stomata opening, sugar translocation, protein synthesis and enzymatic activation. Analysis of nutrients contents made available to the plant and its relationship with what is present in plant tissue is a great alternative for the correct handling of mineral nutrient solutions. The objectives of this study are to evaluate the influence of increased K doses on the growth of tomato and its relationship with other nutrients. For the study, two experiments of fertirigated tomatoes in pots were preformed with sand as substrate, and five different doses of potassium, grown in a greenhouse. Nutritional content in the fruit in early development and leaf immediately above each bunch was evaluated. Data were submitted to polynomial regression analysis to the second degree. Results showed that increased potassium levels significantly influenced K, S and N contents. Increasing potassium doses significantly affect nutritional contents of the plant tissue.

 

Key words: Plant tissue, nitric, nitric-perchloric perchloric digestion, Lycopersicon esculentum Mill.