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Availability of phosphorus in greenhouse cropping systems with tomatoes - influence of soil and citric acid

Båth, Birgitta and Otabbong, Erasmus (2013). Availability of phosphorus in greenhouse cropping systems with tomatoes - influence of soil and citric acid. Acta agriculturae Scandinavica. Section B, Soil and plant science. 63 :6 , 483-488
[Research article]

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Official URL: http://dx.doi.org/10.1080/09064710.2013.804115


Analyses of plant sap from organic greenhouse tomato crops show that the levels of phosphorus (P) are frequently low, despite the fact that soil analyses indicate P status in the soil to be good. In the present study, two soils (A and B) with a pH of just over 6 and a high total content of N and P were investigated with respect to release of P and uptake in a tomato crop. The fertilisers primarily used on soil A was silage and blood meal, and on soil B Vinasse and blood meal. An incubation experiment showed that the release of P per unit time was greater from soil A than soil B. This difference between the two soils may be due to lower soil organic matter concentration, with less P sorbed by Al and Fe on soil A, and a fertiliser regime which favours a high concentration of dissolved organic carbon in this soil. Tomato plants grown for 10 weeks in the soils had greater DW production, total uptake of P and concentration of P in the leaves on soil A than on soil B. Addition of citric acid to the soils in order to mobilise P increased plant yield and uptake of N and P on soil A. Despite the increased growth, the concentration of P in plant leaves increased and the N concentration was unchanged. On soil B addition of citric acid decreased Zn uptake in the tomato plants despite good availability, resulting in a lower concentration of this micronutrient in the leaves. The plants on soil A maintained their concentrations of all micronutrients analysed, but the ratio of P to micronutrients increased. Thus for commercial organic tomato growers, adding citric acid with the irrigation water offers a possibility to increase P availability.

Authors/Creators:Båth, Birgitta and Otabbong, Erasmus
Title:Availability of phosphorus in greenhouse cropping systems with tomatoes - influence of soil and citric acid
Series Name/Journal:Acta agriculturae Scandinavica. Section B, Soil and plant science
Year of publishing :2013
Page range:483-488
Number of Pages:6
Publisher:Taylor & Francis
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:F Plant production > F40 Plant ecology
F Plant production > F62 Plant physiology - Growth and development
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
Agrovoc terms:phosphorus, nitrogen, micronutrients, tomato, lycopersicum
Keywords:phosphorus, nitrogen, micronutrients, tomato crop, Solanum lycopersicum mill, citric acid Introduction For the past ten years, a participatory research group in central Sweden has been working on issues relating to organic production of greenhouse tomatoes. An important issue for the growers in the group is to have a fertilisation
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Additional ID:
Type of IDID
Web of Science (WoS)000328189400002
ID Code:11196
Faculty:NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:04 Sep 2014 09:03
Metadata Last Modified:02 Dec 2014 11:06

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