title: Molecular Composition of Humic Acids of Different Aged Fallow Lands and Soils of Different Types of Use in Northwest of Russia
metadata.name: dc.contributor.author
metadata.value: Polyakov, Vyacheslav
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Nizamutdinov, Timur
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Abakumov, Evgeny
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2024-05-16T11:04:35Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2024-05-16T11:04:35Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2024-05-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Polyakov, V.; Nizamutdinov, T.; Abakumov, E. Molecular Composition of Humic Acids of Different Aged Fallow Lands and Soils of Different Types of Use in Northwest of Russia. Agronomy 2024, 14, 996. https://doi.org/10.3390/agronomy14050996
metadata.lang: en_GB
metadata.name: dc.identifier.issn
metadata.value: 2073-4395
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/45411
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Post-agrogenic transformation of fallow soils leads to changes in soil carbon content, the molecular composition of humic substances, and rates of organic matter stabilization, which can affect climate change on the planet. In this regard, we analyzed the molecular composition of humic acids isolated from natural and fallow soils in the southern Taiga zone of northwest Russia. Different-aged soils on fallow lands represent a model of soil transformation in time, and data on the transformation of soil humic acid molecular composition make a significant contribution to the understanding of soil organic matter stabilization aspect issues. In this case, the molecular structure of humic acids isolated from natural and fallow soils in northwest Russia was analyzed. To study the molecular composition of HAs, the elemental composition was analyzed, and 13C (CP/MAS) NMR spectroscopy of HAs isolated from different aged abandoned soils and soils of different types of use was carried out. The obtained data showed that with the increasing age of soils in the fallow state, there is an increase in the carbon content of humic acids as well as a decrease in nitrogen content. As a result of the increasing age of soils in the fallow state, there are dynamics in the content of aromatic structural fragments in humic acids: 34% for 40 years old, 28% for 80 years old, and 31% for 120 years old. This is due to changes in the precursors of humification and the further transformation of plant residues in the soil. Re-involved fallow land soils lead to an increase in the content of aromatic structural fragments in the composition of HA in relation to HA extracted from mature soils. The lowest content of aromatic structural fragments was observed in the humic acids of 130-year-old agricultural soil, which is associated with the long-term application of organic fertilizers.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This work was supported by the Russian Scientific Foundation in accordance with the agreement from 20 April 2023 № 23-16-20003 and the Saint-Petersburg Scientific Foundation in accordance with the agreement from 5 May 2023 № 23-16-20003.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Agronomy
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: ;996
metadata.lang: -
metadata.name: dc.subject
metadata.value: 13C NMR spectroscopy
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: boreal zone
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: fallow agrosoil
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: arable lands
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Podzol
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Molecular Composition of Humic Acids of Different Aged Fallow Lands and Soils of Different Types of Use in Northwest of Russia
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: agronomy-14-00996.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/45411/1/agronomy-14-00996.pdf
resources.format: Adobe PDF
resources.size: 4,25 MB