Mehlich 3 extractant used for the evaluation of wheat-available phosphorus and zinc in calcareous soils

Ondřej Sedlář, Jiří Balík, Martin Kulhánek, Jindřich Černý and Milan Kos
Additional contact information
Jiří Balík: Czech University of Life Sciences Prague, Prague, Czech Republic
Martin Kulhánek: Czech University of Life Sciences Prague, Prague, Czech Republic
Jindřich Černý: Czech University of Life Sciences Prague, Prague, Czech Republic
Milan Kos: Czech University of Life Sciences Prague, Prague, Czech Republic

Plant, Soil and Environment, 2018, vol. 64, issue 2, 53-57

Abstract: Relation between wheat (Triticum aestivum) nutritional status determined at the beginning of stem elongation and during anthesis, respectively, and available content of phosphorus (P-M3) and zinc (Zn-M3) determined by the Mehlich 3 extractant was studied. Both one-year pot experiment with spring wheat and two-year on-farm trials with winter wheat were run on various calcareous soils (pH values of 7.18-7.94, median 7.80, P-M3 1-289 ppm, median 54, and Zn-M3 2-14 ppm, median 4), in the Czech Republic (Central Europe). Phosphorus nutrition index (ratio of phosphorus concentration in shoot biomass to critical phosphorus concentration - Pc) was calculated using the Belanger et al.'s model: Pc = -0.677 + 0.221N - 0.00292N(2), where both phosphorus and nitrogen concentrations were expressed in g/kg shoot dry matter. Unlike phosphorus concentration in shoot biomass, phosphorus nutrition index significantly correlated with P-M3 content in soil. Optimal values of the phosphorus nutrition index were recorded if P-M3 was 51-68 ppm. Zinc concentration in shoot biomass more strongly correlated with P:Zn ratio (M3) in soil compared to Zn-M3 content in soil. P:Zn ratio in shoot biomass of 130:1 did not lead to phosphorus deficiency and corresponded to P:Zn (M3) ratio in soil of 9.3:1-14.3:1.

Keywords: biofortification; bioavailability; carbonate; soil test; zinc deficiency (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://pse.agriculturejournals.cz/doi/10.17221/691/2017-PSE.html (text/html)
http://pse.agriculturejournals.cz/doi/10.17221/691/2017-PSE.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:64:y:2018:i:2:id:691-2017-pse

DOI: 10.17221/691/2017-PSE

Access Statistics for this article

Plant, Soil and Environment is currently edited by Kateřina Součková

More articles in Plant, Soil and Environment from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().