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Journal of Plant Nutrition Volume 42, 2019 - Issue 8
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Original Articles

Spatio-temporal variations in nutrient concentration in soil solution under greenhouse tomato

Alfonso LlanderalAgronomy Department of Higher Polytechnic School, University of Almeria, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, Almería, Spain; ORCID Iconhttp://orcid.org/0000-0002-0082-2632
ORCID Icon,
Pedro García-CaparrósAgronomy Department of Higher Polytechnic School, University of Almeria, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, Almería, Spain; ORCID Iconhttp://orcid.org/0000-0002-2180-7108
ORCID Icon,
Juana Isabel ContrerasJunta of Andalusia, Institute of Research and Training in Agriculture and Fishery (IFAPA), La Mojonera, Almería, SpainORCID Iconhttp://orcid.org/0000-0003-2431-9537
ORCID Icon,
María Luz SeguraJunta of Andalusia, Institute of Research and Training in Agriculture and Fishery (IFAPA), La Mojonera, Almería, SpainORCID Iconhttp://orcid.org/0000-0002-7360-226X
ORCID Icon &
María Teresa LaoAgronomy Department of Higher Polytechnic School, University of Almeria, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, Almería, Spain; Correspondence[email protected]
ORCID Iconhttp://orcid.org/0000-0002-1593-7328
ORCID Icon
Pages 842-852 | Received 04 Apr 2018, Accepted 24 May 2018, Published online: 11 Mar 2019
 
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Abstract

The aim of this trial was to study the spatio-temporal variability in solution nutrient concentration under intensive greenhouse tomato production, to determine the number of suction-cups needed to obtain a representative sample and the influence by the position in the greenhouses. Twenty sampling points were selected within the greenhouse with one suction-cup per sampling point. One soil solution were sampled per point at weekly intervals to analyze for pH, electrical conductivity, chloride, nitrate, phosphate, sulfate, sodium, potassium, calcium, and magnesium (EC, Cl−, NO3−, H2PO4−, SO42—, Na+, K+, Ca2+, and Mg2+) concentrations. The pH, Cl−, H2PO4−, and SO42− concentrations showed no spatio-temporal variation but EC, NO3−, and K+ showed temporal variation. The spatial variability in EC, K+, Na+, Mg2+, and Ca2+ can be influenced by microclimate and topography. The numbers of suction cups required for a representative sample ranged from 1 to 10 depending on nutrient.

Disclosure statement

No potential conflict of interest was reported by the authors.

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