INFLUENCE OF HUMIC PREPARATIONS ON DEGRADED SOILS PROPERTIES OF TECHNOGENIC BARRENS

This research aim was testing the applicability of exogenic organic matter – extracted humic substances – for the remediation of technogenic barrens soils near Cu-Ni smelter (Kola Peninsula). In short-term laboratory experiments we studied the possibility of stabilization of heavy metals labile form...

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Bibliographic Details
Published in:Dokuchaev Soil Bulletin
Main Authors: P. N. Tregubova, G. N. Koptsik, A. L. Stepanov, A. A. Stepanov, M. Yu. Korneecheva, Yu. V. Kupriianova
Format: Article in Journal/Newspaper
Language:Russian
Published: V.V. Dokuchaev Soil Science Institute 2019
Subjects:
techogenic barren soil
remediation
humates
heavy metals
organic matter
soil acidity
Agriculture (General)
S1-972
Kola Peninsula
kola peninsula
Subarctic
Online Access:https://doi.org/10.19047/0136-1694-2019-97-129-149
https://doaj.org/article/ff10fbf8c1744fa3a53aaf1ee631a014
Description
Summary:This research aim was testing the applicability of exogenic organic matter – extracted humic substances – for the remediation of technogenic barrens soils near Cu-Ni smelter (Kola Peninsula). In short-term laboratory experiments we studied the possibility of stabilization of heavy metals labile forms by commercial humic substances (HS) of different origin (peat humate “Flexom” and coal humate “Extra”) in comparison with HS, inoculated by microorganisms – nitrogen fixers and mycorrhizae-forming fungi and mineral fertilizers (NPK и CaCO3). Experiments were provided during 45 days after 14 days of pre-incubation under controlled conditions in climate chamber with light, temperature and humidity imitating the polar day conditions in Kola Subarctic. After experiments we evaluated changes in soil chemical properties, soil microbial community and test-culture (Deschampsia cespitosa). Peat humate application is ineffective without additional manipulations (e.g. combination with CaCO3), cooperation with biological applicants cannot be pointed out. Application of coal humate favours to metals stabilization, soil microorganism’s activation, test-culture growth. It may be effective to combine coal humate with biological applicants like mycorrhizae-forming fungi. So, coal-humates may be perspective growth-stimulator, ameliorant and detoxicant in remediation of degraded soils in conditions of polymetallic contamination.

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