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Efects of binary polymer-humic soil amendments on soil carbon cycle and detoxication ability of heavy metal pollutionстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Yakimenko Olga, Pozdnyakov Lev, Kadulin Maxim, Gruzdenko Dmitriy, Panova Irina, Yaroslavov Alexander
- Журнал: Chemical and Biological Technologies in Agriculture
- Том: 11
- Год издания: 2024
- Издательство: SPRINGER
- Местоположение издательства: VAN GODEWIJCKSTRAAT 30, DORDRECHT, NETHERLANDS, 3311GZ
- Первая страница: 1
- Последняя страница: 13
- Номер статьи: 174
- DOI: 10.1186/s40538-024-00679-6
- Аннотация: Background Synthetic hydrophilic polyelectrolytes are considered as perspective tools to optimize soil propertiesand fnd increasing applications in agricultural technologies. One possible polyelectrolyte-based soil conditionerthat has shown promise for improving soil hydrophysical properties is hydrolyzed polyacrylonitrile (HYPAN), linear polyanion. Combinations of HYPAN with humic substances in binary polymer-humic soil amendment presumably couldprovide a synergistic impact. In this study we investigated the efects of HYPAN, two diferent potassium humates(from lignite and lignosulfonate), and binary compositions of HYPAN with humates in the ratios of 1:1 and 1:2, on soilmicrobiological activity. We applied polymer solutions (0.9% on a dry matter basis) in a lab experiment and examined how they afected soil respiration, microbial biomass, metabolic quotient, and the decomposition rate constantin soil–polymer mixtures. A concurrent set of studies involved spiking soil–polymer mixes with heavy metals (copper,zinc, lead and cadmium).Results In uncontaminated soil–polymer mixtures both humates stimulated the activity of soil microorganisms,expressed in increased basal respiration, microbial biomass, and mitigation of HM toxicity. The efects of binarypolymer-humic formulations and HYPAN were comparable to and close in size to those of humates. On the 90th day,humates increased microbial respiration by 54–77% and HYPAN alone by 30%. Binary compositions were more efcient when combined with humate from lignosulphonate. The maximum increase in microbial biomass was obtainedwith the same humate both in composition and alone (65 and 91 µg C g−1). Under conditions of HM contaminationat the end of the incubation, the levels of microbiological parameters in HM spiked soil–polymer mixtures did not statistically difer from the uncontaminated control. Every polymer formulation helped to partially restore microbialactivity while reducing the toxic efects of HM. In these circumstances, humate from lignite both by itself and in combination with HYPAN performed better. The quality of organic matter in both humates and HYPAN was the primarydeterminant of the impact of the examined amendments.Conclusions Combination of natural humate and synthetic HYPAN stimulated the activity of soil microorganisms,increased their biomass and mitigated the toxicity of heavy metals present in the soil. This allows the use of binaryHYPAN-humate formulations to improve the chemical and biological properties of soil and increase its productivity.
- Добавил в систему: Якименко Ольга Сергеевна
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