ACCUMULATION OF ¹³⁷CS IN SPRING WHEAT GRAIN AT DIFFERENT LEVELS OF NITROGEN AND POTASSIUM NUTRITION IN ANTHROPOGENIC-TRANSFORMED PEAT SOIL

Anthropogenic-transformed peat soils occupy significant areas in the territory of the Republic of Belarus in composition of agricultural land contaminated with radionuclides. A number of studies have been carried out in recent years where diagnostic features, properties and fertility, regimes of mineral nutrition of plants on these soils have been studied. However, studies on radionuclides migration, impact of various agricultural practices on penetration into agricultural crops have not been carried out. The article dwells on study of ¹³⁷Cs penetration into spring wheat grain depending on the levels of nitrogen and potassium nutrition of plants when various rates of nitrogen and potassium fertilizers were applied on anthropogenic-transformed peat soil. It has been determined that N₁₂₀P₆₀K₁₂₀ application reduces ¹³⁷Cs level in grain by 15–22 % compared to the control, and when combined with mineral fertilizers, copper-containing fertilizer and plant growth regulator – by 34 %. The minimum accumulation of ¹³⁷Cs in spring wheat is determined at nitrogen-potassium ratio of 1:(1.0–1.2). At the ratio of 1:(0.2–0.6) nitrogen deficiency and increase in radionuclide concentration in grain are observed due to yield decrease. Increase in accumulation of radionuclide in grain is observed at the ratio above 1:1.5. The results of researches make it possible to determine the allowable contamination density values of the anthropogenic-transformed peat soil with ¹³⁷Cs and optimal doses of mineral fertilizers for cultivation of food and forage purpose spring wheat.

1. Sysoeva A. A. Experimental research and modeling of the processes determining the mobility of 90Sr and 137Cs in the soil-plant system. Abstract of doctoral thesis in biology. Obninsk, 2004. 29 p. (in Russian).

2. Warner F., Harrison R. M. (eds.). Radioecology after Chernobyl: biogeochemical pathways of artificial radionuclides. Chichester, New York, Toronto, John Wiley & Sons, 1993. 367 p. (Russ. ed.: Applbi L. Dzh., Devell L., Mishra Yu. K., Vois E. Kh. Puti migratsii iskusstvennykh radionuklidov v okruzhayushchei srede. Radioekologiya posle Chernobylya. Moscow, Mir Publ., 1999. 511 p.)

3. Moiseev I. T., Agapkina G. I., Rerikh L. A. A study of the behavior of 137Cs in soils and its entry into crops depending on various factors. Agrokhimiya = Agricultural Chemistry, 1994, no. 2, pp. 103-118 (in Russian).

4. Shmigel’skaya I. D., Ageets V. Yu. Accumulation of radionuclides by plants depending on the direction of soil formation processes and the degree of hydromorphism. Pochvy, ikh evolyutsiya, okhrana i povyshenie proizvoditel’noi sposobnosti v sovremennykh sotsial’no-ekonomicheskikh usloviyakh: materialy I s’ezda Belorusskogo obshchestva pochvovedov [Soils, their evolution, protection and increase of productive capacity in modern socio-economic conditions: materials of the I Congress of the Belarusian Soil Science Society]. Minsk, Gomel, 1995, pp. 272 (in Russian).

5. Shmigel’skaya I. D., Efimova I. A., Arastovich T. V. Contamination of perennial grasses with cesium-137 and strontium-90 depending on soil types and properties. Pochvennye issledovaniya i primenenie udobrenii: mezhvedomstvennyi tematicheskii sbornik [Soil research and application of fertilizers: interdepartmental thematic collection]. Minsk, 2001, iss. 26, pp. 270-288 (in Russian).

6. Nisbet A. F., Woodman R. F. Soil-to-plant transfer factors for radiocaesium and radiostrontium in agricultural systems. Health Physics, 2000, vol. 78, no. 3, pp. 279-288. https://doi.org/10.1097/00004032-200003000-00005

7. Gulyakin I. V., Yudintseva E. V., Levina E. M. The influence of soil moisture on the entry of strontium-90 and cesi-um-137 into plants. Agrokhimiya = Agricultural Chemistry, 1976, no. 2, pp. 102-107 (in Russian).

8. Moiseev I. T., Tikhomirov F. A., Rerikh L. A. On the influence of soil moisture on the intake of 137Cs in agricultural plants. Agrokhimiya = Agricultural Chemistry, 1974, no. 7, pp. 124-127 (in Russian).

9. Kas’yanchik S. A., Kotovich A. M. Dependence of the Cs-137 transfer to grasses of flood plain meadows on natural and regulated factors. Fundamental’nye i prikladnye aspekty radiobiologii: biologicheskie effekty malykh doz i radioaktivnoe zagryaznenie sredy (radioekologicheskie i mediko-biologicheskie posledstviya katastrofy na ChAES): tezisy dokladov Mezhdunarodnoi nauchnoi konferentsii, Minsk, 16-17 aprelya 1998 g. [Fundamental and applied aspects of radiobiology: biological effects of small doses and radioactive contamination of the environment (radioecological and biomedical consequences of the Chernobyl catastrophe): abstracts of the International scientific conference, Minsk, 16-17 April 1998]. Minsk, 1998, pp. 108 (in Russian).

10. Rerikh L. A., Moiseev I. T. The influence of soil properties on the transformation of 137Cs forms and its entry into agricultural plants. Agrokhimiya = Agricultural Chemistry, 1989, no. 8, pp. 96-100 (in Russian).

11. Petryaev E. P., Sokolik G. A., Ivanova T. G., Morozova T. K., Sumrach N. G. Dynamics of vertical migration of Chernobyl radionuclides in soil cover. Geokhimicheskie puti migratsii iskusstvennykh radionuklidov v biosfere: tezisy dokladov V konferentsii, g. Pushchino, dekabr’ 1991 g. [Geochemical ways of migration of artificial radionuclides in biosphere: abstracts of the 5th conference, Pushchino, December 1991]. Pushchino, 1991, pp. 25 (in Russian).

12. Sokolik, G. A. The influence of fulvic and humic acids on the mechanisms of radionuclides 137Cs and 90Sr accumulation by plant cells. Radioekologiya torfyanykh pochv: materialy Mezhdunarodnoi konferentsii, Sankt-Peterburg, 7-11 iyunya 1994 g. [Radioecology of peat soils: materials of the International conference, St. Petersburg, June 7-11, 1994]. St. Petersburg, 1994, pp. 23-24 (in Russian).

13. Meerovskii A. S. Preservation and effective use of reclaimed lands in the Belarusian Polesie. Evropeiskoe Poles’e - khozyaistvennaya znachimost’ i ekologicheskie riski: materialy Mezhdunarodnogo seminara, g. Pinsk, 19-21 iyunya 2007 g. [European Polesie - economic significance and environmental risks: materials of the International workshop, Pinsk, June 19-21, 2007]. Minsk, 2007, pp. 37-39 (in Russian).

14. Meerovskii A. S., Tribis V. P. Problems of the use and preservation of peat soils. Novosti nauki i tekhnologii [News of Science and Technologies], 2012, no. 4 (23), pp. 3-9 (in Russian).

15. Tsytron G. S. Anthropogenically-transformed soils of Belarus. Minsk, Institute of Soil Science and Agrochemistry of the National Academy of Sciences of Belarus, 2004. 124 p. (in Russian).

16. Lapa V. V., Chernysh A. F. (ed.) Atlas of soils of agricultural lands of the Republic of Belarus. Minsk, IVC of the Ministry of Finance, 2017. 169 p. (in Russian).

17. Mazhaiskii Yu. A. (ed.). Ecological and economic substantiation of reclamation of peat-bog complexes and technology of their rational use. Moscow, Ryazan, Ryazan State Agrotechnological University, 2012. 300 p. (in Russian).

18. Semenenko N. N., Vaga I. I. Economic efficiency of integrated application of intensification means of winter triticale cultivation on anthropogenically transformed peat soils. Melioratsiya [Reclamation], 2010, no. 2 (64), pp. 123-128 (in Russian).

19. Semenenko N. N. Peat-bog soils of Polesie: transformation and ways of effective use. Minsk, Belaruskaya navuka Publ., 2015. 282 p. (in Russian).

20. Bogdevich I. M. Results and prospects of agrochemical protective measures on the lands contaminated with radio-nuclides in Belarus. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya agrarnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Agrarian series, 2011, no. 3, pp. 27-39 (in Russian).

21. Bogdevich I. M. The role of soil fertility in the system of protective measures on the lands contaminated with radio-nuclides in Belarus. Plodorodie pochv i effektivnoe primenenie udobrenii: materialy Mezhdunarodnoi nauchno-prakticheskoi konferentsii, Minsk, 5-8 iyulya 2011 g. [Soil fertility and effective application of fertilizers: materials of the International sci-entific and practical conference, Minsk, July 5-8, 2011]. Minsk, 2011, pp. 13-15 (in Russian).

22. Putyatin Yu. V. Minimization of 137Cs and 90Sr radionuclide entry into plant products. Minsk, Institute of Soil Science and Agrochemistry, 2008. 267 p. (in Russian).

23. Aleksakhin R. M., Moiseev I. T., Tikhomirov F. A. Behavior of 137Cs in the soil-plant system and the influence of fertilization on radionuclide accumulation in the crop. Agrokhimiya = Agricultural Chemistry, 1992, no. 8, pp. 127-138 (in Russian).

24. Putyatin Yu. V., Seraya T. M., Petrikevich O. M. Influence of acidity of sod-podzolic sandy loam soil and doses of potassium fertilizers on the transfer of 137Cs and 90Sr to spring wheat. Pochvovedenie i agrokhimiya: sbornik nauchnykh trudov [Soil Science and Agrochemistry: a collection of scientific papers]. Minsk, 2004, iss. 33, pp. 163-169 (in Russian).

25. Bogdevich I. M., Tarasyuk S. V., Shmigel’skaya I. D., Seraya T. M., Putyatin Yu. V., Efimova I. A., Ochkovskaya L. V. Harvest and entry of radionuclides 137Cs and 90Sr in agricultural crops depending on the doses of potassium fertilizers. Pochvennye issledovaniya i primenenie udobrenii: mezhvedomstvennyi tematicheskii sbornik [Soil research and application of fertilizers: interdepartmental thematic collection]. Minsk, 2003, iss. 27, pp. 158-169 (in Russian).

26. Sanzharova N. I., Sysoeva A. A., Isamov N. N., Aleksakhin R. M., Kuznetsov V. K., Zhigareva T. L. The role of chemistry in the rehabilitation of agricultural lands exposed to radioactive contamination. Rossiiskii khimicheskii zhurnal = Russian Journal of General Chemistry, 2005, vol. 49, no. 3, pp. 26-34 (in Russian).

27. Evans E. J., Dekker A. J. Effect of nitrogen on caesium-137 in soils and its uptake by oat plants. Canadian Journal of Soil Science, 1969, vol. 49, no. 3, pp. 349-355. https://doi.org/10.4141/cjss69-048

28. Moiseev I. T., Rerikh L. A., Tikhomirov F. A. To the issue of the influence of mineral fertilizers on the uptake of 137Cs by agricultural plants from soils. Agrokhimiya = Agricultural Chemistry, 1986, no. 2, pp. 89-94 (in Russian).

29. Tulina A. S., Stavrova N. G., Semenov V. M. Regularities of 137Cs uptake by plants from sod-podzolic sandy soil with the application of nitrogen fertilizers. Agrokhimiya = Agricultural Chemistry, 2007, no. 11, pp. 61-70 (in Russian).