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Journal of Plant Nutrition Volume 42, 2019 - Issue 4
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Articles

Testing foliar nutritional changes in space and over time in greenhouse tomato

Alfonso LlanderalAgronomy Department of Higher Engineering School, University of Almeria, Agrifood Campus of International Excellence ceiA3, Ciambital, Almería, Spain; ORCID Iconhttp://orcid.org/0000-0002-0082-2632
ORCID Icon,
Pedro García-CaparrósAgronomy Department of Higher Engineering School, University of Almeria, Agrifood Campus of International Excellence ceiA3, Ciambital, Almería, Spain; ORCID Iconhttp://orcid.org/0000-0002-2180-7108
ORCID Icon,
Juana Isabel ContrerasJunta of Andalusia, La Mojonera, Institute of Research and Training in Agriculture and Fishery (IFAPA), Almería, SpainORCID Iconhttp://orcid.org/0000-0003-2431-9537
ORCID Icon,
María Luz SeguraJunta of Andalusia, La Mojonera, Institute of Research and Training in Agriculture and Fishery (IFAPA), Almería, SpainORCID Iconhttp://orcid.org/0000-0002-7360-226X
ORCID Icon &
María Teresa LaoAgronomy Department of Higher Engineering School, University of Almeria, Agrifood Campus of International Excellence ceiA3, Ciambital, Almería, Spain; Correspondence[email protected]
ORCID Iconhttp://orcid.org/0000-0002-1593-7328
ORCID Icon
Pages 333-343 | Received 29 Dec 2017, Accepted 03 Apr 2018, Published online: 10 Jan 2019
 
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Abstract

The aim of this trial was to study the spatial and temporal variability of the leaf nutrient concentration in tomato intensive crop under greenhouse, to know the number of sub-samples needed to be taken to obtain a representative sample and the influence by the position in the greenhouses. The experiment consisted on the selection of 20 sample points over the greenhouse with one tomato plant per sample point. One fully expanded leaf by sample point with an interval of a week were taken. Nitrogen (N), phosphorus (P), potassium (K), sulfur (S), sodium (Na), and chloride (Cl) were determined in each sample. According to these results, N, P, K, S, Cl, and Na concentration showed no variation over the time. The spatial variability of N, P, and K could be related with the light intensity and yield. The suggested number of leaf sub-sample ranging from 25 to 126 depending on nutrient.

Acknowledgment

The authors thank Dimitry Toskanos for his English style corrections.

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