Popirny M. Transformation of the composition of the organic matter of the typical black soil by depends on the soil tillage

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0419U002923

Applicant for

Specialization

  • 03.00.18 - Ґрунтознавство

12-06-2019

Specialized Academic Board

К 64.354.02

National Scientific Center «Institute for Soil Science and Agrochemistry Research named after O. N. Sokolovsky»

Essay

Object - processes of biotransformation of the organic matter content of the typical black soil, processes of supramolecular aggregation and stabilization of the conformation of humic acids of the typical black soil under different soil tillage. Purpose - to establish a biotransformation content of the organic matter content of the soil and humic acids, that characterize the molecular biophysical and chemical processes of formation and stabilization of humus under different soil tillage. Methods - the field, laboratory-model, laboratory-analytical, physical-chemical, statistical. Theoretical results - Further deepening of the fundamental-theoretical foundations and scientific ideas about the course of molecular processes and mechanisms of formation and transformation of humus substances in the typical black soil under different soil tillage. It was found that the intensification of the typical black soil cultivation increases the activity of biotransformation of the organic matter of the upper soil layer, the value of the activity of the formation of humus soil substances, and also increases the mobility of conformation, hydrated water and the conjugated π-electronic system of aromatic structures of humic acids. It is proved that the change of biophysical and chemical properties and molecular parameters of humic acids of chernozem under different tillage is due to the processes of reorganization of humic superstructure, which is characterized by the restructuring of intermolecular forces, which depends on the composition of the products of humification. Practical results - the research results can be used in the development of agronomic measures to improve the stability of the organic matter of typical black soil, as well as for the scientific substantiation of the application of minimum and differentiated soil tillage systems under specific agroecological conditions and the development of technology for the management of organic matter in the soil under intensive cultivation. The patent for the utility model "Method of determining the effective soil fertility" has been obtained. Novelty - the biophysical and chemical mechanisms of response of humic molecules of the typical black soil and their changes in different soil tillage in the framework of the modern supramolecular paradigm and the method of studying humus substances have been investigated. It is proved that changes in the physical and chemical properties and molecular parameters of humic acids of chernozem typical for different cultivations depend on the processes of reorganization of the dynamic humic superstructure, which is determined by the reorganization of intermolecular forces. The mobility of humic superstructure of typical blacke soil under different soil tillage by the method of ultra high frequency electrometric relaxation spectroscopy has been investigated, that makes it possible to determine the mobility of unprotected hydrophilic parts of humic acids. The further development of the issue of controlling humic suprastructure in situ to increase sequestration of organic carbon and protecting the biologically active labile part of the organic matter of black soil typical for different soil cultivation has become further developed. Degree of application - the materials of the research were introduced into the educational process of the Dokladevich Dokuchaev College of Science and Technology during the teaching of the disciplines for the educational program "Expert assessment of soils". The field is soil science.

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