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

Effect of soil acidification on growth indices and microelements uptake by greenhouse cucumber

Ahmad Mohammadi Ghehsareh* and Najmeh Samadi
Department of Soil Science, Faculty of Agriculture, Islamic Azad University, Khorasgan Branch, Isfahan, Iran.
Email: [email protected]

  •  Accepted: 13 December 2011
  •  Published: 19 March 2012

Abstract

Based on the climate condition of Iran and most of its soils that are calcareous, it is important to 
prepare the nutritional requirements of cucumber and decrease the growth and development limitations 
of greenhouse cucumber. In this way, notation to pH properties is essential. Optimum pH for plants 
production is slightly acidic such that it is necessary to correct soil pH to a more suitable range in order 
to increase nutrients availability for plants. The goal of this research is to assess the effect of irrigation 
water pH changes on yield and nutrient uptake especially on micro nutrients by plant. The experiment 
consisted of three treatments of pH (5.5, 6.5 and 7.5). The experiment was carried out in a factorial 
design in the research greenhouse of Khorasgan University. During growth season, Ca and 
micronutrients were not used. After sampling different nutrients, concentrations were measured. At the 
end of growth season, growth indices were measured. The evidences provided by this experiment 
indicated that pH changes did not have significant effect on fruit yield and dry weight of plant shrub. 
Also, irrigation water pH did not have effect on chlorophyll amounts, LAI and stem diameter, 
significantly. However, the highest amount of LAI was achieved in pH = 5.5. The pH changes in 
irrigation water had significant effect on nutrients uptake, though micronutrients uptake was increased 
and the optimum concentration of nutrients was extracted in plant leaves and fruits by decreasing the
pH to 5.5. The maximum uptake of Ca and Mg was obtained when the pH = 7.5 and the maximum uptake 
of N, P and K was obtained when the pH = 6.5.
Key words: Acidification, cucumber, micro and macro nutrients, growth indices.