V. T. Mammadzade
Institute of Soil Science and Agrochemistry of the Ministry of Science and Education of the Republic of Azerbaijan, Baku, Republic of Azerbaijan
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Volume 25 No. 1
Date of paper submission: 19.05.2024, date of review: 02.09.2024, date of acceptance: 27.09.2024
Published: 01/31/2025
Abstract. The purpose is to conduct a study of the microbiological situation of mountain forest yellow soils. Methods. In 2022–2024, soil researches were carried out on the Lankaran Plain, one of the important tourist and economic regions of Azerbaijan. Soil material for analysis was collected from horizon A. Scientific novelty. Scientific innovations obtained in the course of research can be used as literary material due to the lack of biological soil research using modern methods in the Lenkoran region in recent years. Results. Research has established that microbiological activity closely related to humic substances. Therefore, research was carried out on two natural biotopes: forest and Khanbulanchay. Soil warming could change bacterial communities, affecting carbon (C) storage and nitrogen (N) cycling in forest ecosystems. Soil warming significantly altered the bacterial community structure, causing a decrease in Proteobacteria and Acidobacteria and an increase in Actinobacteria and Chloroflexi. High N addition had a greater effect on bacterial community structure than low N addition. Warming shifted the bacterial community toward oligotrophic taxa, whereas nitrogen addition may have weakened this trend. We conclude that altitude is the environmental factor most strongly associated with total microbial counts. Soil acidity is not associated with changes in microbial abundance, but increased numbers of micromycetes are found in more acidic soils regardless of altitude. The total microbial number of microorganisms in the studied accumulation horizons varied from 5.96 lg CFU/g dry soil to 6.41 lg CFU/g dry soil. This study, like all its results, can serve as the basis for conducting a multi-year seasonal analysis of the surveyed areas. This will allow for search for consistent relationships over the long term, covering different environmental factors potentially influencing soil microbial biota.
Keywords: soil, microbiota, biotopes, relationship between humus and microorganisms
Acknowledgements. The author expresses his deep gratitude to the institute for providing the necessary equipment for laboratory research and for seasonal business trips to the research site at the Institute of Soil Science and Agrochemistry, Ministry of Science and Education of the Republic of Azerbaijan. The research presented in the article was carried out at the expense of the author’s own funds at the Institute of Soil Science and Agrochemistry, Ministry of Science and Education of the Republic of Azerbaijan.
For citation: Mammadzade V. T. Microbiological activity of natural biotopes of mountain-forest yellow earth soils. Agrarian Bulletin of the Urals. 2025; 25 (01): 10‒19. DOI: https://doi.org/10.32417/1997-4868-2025-25-01-10-19 (In Russ.)
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