Role of sulphate in affecting soil availability of exogenous selenate (SeO42-) under different statuses of soil microbial activity

To chci

We investigated sulphate application, different statuses of soil microbial activity and their joint effects as variables associated with changes in potentially plant-available selenium (Seppa) and soil Se fractionation during the course of an incubation study. The time-resolved behaviour of added selenate (400 µg Se/kg as Na2SeO4) in two agricultural soils was elucidated by means of single extraction (50 mmol/L NH4H2PO4), sequential extraction procedure (SEP) and chemical speciation analysis in phosphate extracts. The decrease in phosphate-extractable Se, a consequence of soil aging, was inhibited by sulphate (by 34% and 29% in Chernozem and Cambisol, respectively) and by gamma-irradiation (by 46% and 20% in Chernozem and Cambisol, respectively) after 72 days of incubation as compared to the control treatments. Glucose amendment dramatically decreased Seppa only in the Chernozem. After 1 year, the initial soil treatment with respect to inhibited or stimulated microbially-mediated processes substantially controlled the distribution pattern of exogenous Se as observed using the SEP. Application of sulphur fertilisers and sources of labile organic matter is thus an essential agronomic practice to correct unfavourable amounts of Seppa. … celý popis

Podrobná bibliografie

Hlavní autor

Lukáš Praus

Další autoři

Jiřina Száková, 1963-

Typ dokumentu

Články

Fyzický popis

4 ilustrace

Publikováno v

Plant, Soil and Environment. -- ISSN 1214-1178. -- Roč. 65, č. 9 (2019), s. 470-476

Témata

FIELD EXPERIMENTATION

CHERNOZEMS

CAMBISOLS

SOIL CHEMICOPHYSICAL PROPERTIES

TRACE ELEMENTS

SELENIUM

ORGANIC COMPOUNDS

Soil sampling

SOIL ANALYSIS

NUTRIENT AVAILABILITY

PHOSPHATES (SALTS)

IONS

EXTRACTION

EXPERIMENTATION

GAMMA IRRADIATION

IMMOBILIZATION

STERILIZATION

SOIL BIOLOGY

SOIL MICROORGANISMS

polní pokusy

černozemě

kambisoly

chemickofyzikální půdní vlastnosti

stopové prvky

selen

organické sloučeniny

použité dávky

odběr půdních vzorků

rozbory půd

dostupnost živin

fosfáty

ionty

extrakce

pokusnictví

sulfáty

gama ozářování

imobilizace

sterilizace

půdní biologie

půdní mikroorganizmy

Česko

Suchdol (Praha, Česko)

Humpolec (Pelhřimov, Česko)

bioredukce

Popis jednotky

1 graf, 3 tabulky

Bibliografie

Seznam literatury na s. 476,