RESEARCH INTO THE DISTRIBUTION OF RADIOCARBON IN THE SOIL OF FOREST ECOSYSTEMS OF THE REPUBLIC OF KAZAKHSTAN

This paper presents research into the distribution of radiocarbon in the soils of forest ecosystems of the Republic of Kazakhstan. The forest compartments of the Beskaragai area of the Abai region and the Burabai area of the Akmola region were selected as research objects. For research, samples of forest litter and soil were collected layerwise, in which the content of ¹⁴C was determined by liquid scintillation spectrometry. The research findings showed that the soils of the Beskaragai area exhibit an elevated content of ¹⁴C gradually decreasing from top to bottom. This is due to radioactive contamination caused by the tests conducted at the Semipalatinsk Test Site. The content of ¹⁴C in the soils of the Burabai area is below the detection limit.

1. Chichagova O.A., Zazovskaya E.P. Radiouglerodnoe datirovanie: proshloe, nastoyashchee, budushchee – razvitie idey I.P. Gerasimova // Byulleten' Pochvennogo instituta im. V.V. Dokuchaeva. – 2015. – Issue 81. – P. 160–176. – https://doi.org/10.19047/0136-1694-2015-81160-176.

2. Larsen T., Yokoyama Yu., Fernandes R. Radiocarbon in ecology: Insights and perspectives from aquatic and terrestrial studies // Methods in Ecology and Evolution. – 2018. – Vol. 9. – P. 181–190. https://doi.org/10.1111/2041-210X.12851.

3. Boden, T. A., Marland, G., & Andres, R. J. Global, Regional, and National Fossil-Fuel CO2 Emissions . Oak Ridge National Laboratory, US Department of Energy, 2013.

4. Zhou, W., Niu, Z., Wu, S., Xiong, X., Hou, Y., Wang, P., ... & Zhu, Y. Fossil fuel CO2 traced by radiocarbon in fifteen Chinese cities. Science of the Total Environment. – 2020. – Vol. 729. – P. 138639.

5. Khokhlova O.S., Zazovskaya E.P., Chichagova O.A., Yablonskiy L.T. Radiouglerodnoe datirovanie razlichnykh materialov iz kurganov rannikh kochevnikov Yuzhnogo Priural'ya // Izvestiya Rossiyskoy akademii nauk. Seriya geograficheskaya. – 2010. – No. 3. – P. 82–94.

6. Hua Q., Barbetti M., Rokowski A.Z. Atmospheric radiocarbon for the period 1950–2010 / Radiocarbon. – 2013. – Vol. 55. – P. 2059–2072. https://doi.org/10.2458/azu_js_rc.v55i2.16177

7. Myglan V.S. Metody datirovaniya / Paleoklimatologiya: uch. pos. – Krasnoyarsk, 2007. – P. 12–18.

8. Trumbore S. Carbon respired by terrestrial ecosystems – recent progress and challenges // Global Change Biology. – 2006. – Vol. 12. – P. 141–153. https://doi.org/10.1111/j.1365-2486.2006.01067.x

9. Semipalatinskiy poligon. Yadernye ispytaniya SSR. Obespechenie obshchey i radiatsionnoy bezopasnosti pri provedenii yadernykh ispytaniy. FU MEDBIOEKSTREM Minzdrav RF. Pod red. Logacheva V.A. – Moscow, 1997 g., – 244 p.

10. Koarashi J., Atarashi-Andoh M., Nagano H. et.al. Practical Guide on Soil Sampling, Treatment, and Carbon Isotope Analysis for Carbon Cycle Studies / JAEA-Technology 2020-012. – JAEA, 2020. – 55 p. – https://doi.org/10.11484/jaea-technology-2020-012.

11. Sokhranenie lesov v Kazakhstane na blago lyudey. https://www.undp.org/ru/kazakhstan/stories/sokhranenielesov-v-kazakhstane-na-blago-lyudey (date of access 24.02.2025).

12. Lesnoy fond Kazakhstana. https://www.gov.kz/memleket/entities/forest/activities/3811?lang=ru (date of access 24.02.2025.).

13. Bioraznoobrazie. https://newecodoklad.ecogosfond.kz/2016/bioraznoobrazie / (date of access 24.02.2025).

14. Pochvennaya karta Semipalatinskoy oblasti Kazakhskoy SSR. M. 1:300000/ Pod red. A.A. Sokolova, M.K. Kolkhodzhaeva, N.I. Kotina, K.Sh. Faizova // In-t pochvovedeniya AN Kaz. SSR Alma-Ata, 1958.

15. Pochvy Kazakhskoy SSR. Pochvy Tselinogradskoy oblasti / V.V. Redkov. Alma-Ata: Nauka, 1964. – 325 p.

16. Metodicheskie rekomendatsii. Opredelenie radiougleroda v komponentakh prirodnoy sredy. Branch “IRSE” RSE NNC RK, No. 01-08/724 from 03.10.2022. – 14 p.

17. Raimkanova A.M., Lyakhova O.N., Aidarkhanova A.K., Serzahnova Z.B. Methodological approaches and their use in studying radiocarbon in soil of the “Experimental Field» site // NNC RK Bulletin. – 2021. – Issue 4. – P. 3– 9. (In Russ.) https://doi.org/10.52676/1729-7885-2021-4-3-9

18. ISO 13162:2021: Water quality – Carbon 14 – Test Method Using Liquid Scintillation Counting (International Organization for Standardization, Geneva, 2021).

19. GOST 26213-2021. Pochvy. Metody opredeleniya organicheskogo veshchestva. – Moscow.: Izd-vo standartov, 1985.– 12 p.

20. GOST 12536-2014. Grunty. Metody laboratornogo opredeleniya granulometricheskogo (zernovogo) i mikroagregatnogo sostava. – Moscow: Standartinform, 2015.– 24 p.

21. GOST 5180- 2015. Grunty. Metody laboratornogo opredeleniya fizicheskikh kharakteristik. – Moscow: Standartinform, 2016.– 19 p.

22.