Keywords: dark chestnut alkalized soil, meadow chestnut alkalized solonetz, agro-ameliorative soil condition, rice irrigation system, rice.


Relevance of research. The most common irrigation regime for rise in the world is constant flooding.

Soils of rice crop rotation undergo significant changes during the construction of rice irrigation systems, and during their operation. This leads to the formation of so-called "rice soils" that is the result of the transformation of full-profile soils, which were partially or completely disturbed when planning and building rice checks. Keeping the water layer in the field for 4-5 months leads to irreversible changes in the morphological, physical and chemical soil properties. Therefore, it is relevant to determine the indicators of the soil cover, taking into account the features of the soils of rice crop rotations, in order to prevent the development of degradation processes and increase the productivity of rice crop rotation.

The purpose of the study is to determine the main indicators of soil cover of rice crop rotation and their testing on a rice irrigation system with an area of ​​190 hectares.

Methods and methods of research. During the study the following methods were used: field method - to study the basic soil properties; laboratory one - to study of physical and chemical, ameliorative, agrochemical soil properties and chemical composition of irrigation, subsoil, drainage and waste water; mathematical and statistical, comparative and retrospective - to evaluate the study results of the basic soil fertility indices.

The research was carried out in the area of a rice irrigation system with 8-field crop rotation, where the proportion of rice does not exceed 50%. Rice was grown in accordance with the technology of rice growing, taking into account environmental protection requirements. For the companion crops, commonly used cultivation technologies were used. The system has been operated in a project mode for 50 years. The soil cover of the investigated system is represented by dark chestnut alkalized (72.9 hectares), meadow solonetz(18.9 hectares) and meadow chestnut alkalized (75.8 hectare) soil types.

Research results. On the basis of analysis of retrospective data of monitoring study of  the main indicators of agro-amelioration status of soils under rice crop rotation, the indicators of soil condition for the main soil types of rice irrigation systems were determined: groundwater level, groundwater mineralization, content of light-soluble salts in arable layer, chlorine ions content in soil-water extract, toxic salt content, soil salt balance, humus content, the content of easily hydrolyzed nitrogen compounds, the density of upper humus layer, the content of air-dry aggregates, content of water-stable aggregates.

Conclusions. The approbation of the developed soil condition indicators on the rice irrigation system of the Rice Institute of the National Academy of Agrarian Sciences was carried out, which enabled to identify the main problems and specify the ways to overcome them. In the areas with meadow chestnut alkalized and meadow solonetzsoil types, it is necessary to increase their drainage capacity, namely to repair drainage networks. In the whole area of the investigated rice irrigation system, it is necessary to increase the proportion of perennial legumes and fallow land in the crop rotation, to do soil slitting or other types of mechanical soil treatments to improve its structural and aggregate composition, in particular, the content of air-dry soil aggregates in size of 0.25-10,00 mm and water-stable soil aggregates larger than 25 mm.

Author Biographies

V. O. Ushkarenko, Kherson State Agrarian University

Doctor of agrarian sciences, proff.,  academician NAAS

K. V. Dudchenko, Institute of Rice of theNational Academy of Agrarian Sciences

Ph. D. in agrarian sciences


1. Szabolcs, I. (1994). Prospects of soil salinity for the 21st Century. In Proceedings of the 15th World Congress of Soil Science (ISSS). (Vol. 1).Acapulco, Mexico City, 123–141.
2. Sheudzhen,A.H., Gutorova,O.A., Zubkova,T.A., Shtuc,R.V., Kashhyc,V.P., & Maksymenko,E.P. (2016). Morfologycheskye osobennosty y yzmenenye magnytnoj vospryymchyvosty pochv rysovogo agrocenoza y bogaru [Morphological features and changes in the magnetic susceptibility of the soils of rice agrocenosis and dry rain forests]. Mezhdunarodnuj yssledovatel'skyj zhurnal,11 (42) part 6, 133-137. [in Russian].
3. Orlov, D.S. (1992).Hymyja pochv: 2-eyzd. [Soilchemistry: 2-ndedition]. Mockva: MGU. [in Russian].
4. Morozov, V.V., Granovs'ka, L.M., & Poljakov, M.G. (2003). Ekologo-melioratyvni umovy pryrodokorystuvannja na zroshuvanyh landshaftah Ukrai'ny. [Ecological and land reclamation conditions of nature use in irrigated landscapes of Ukraine: textbook]. Kyiv-Kherson: Haylant. [in Ukrainian].
5. Kol'cov,A.V., & Tytkov, A.A. (2004). Evoljucyja rysovuh landshaftno-melyoratyvnuh system na juge Ukraynu [The evolution of rice landscape-meliorative systems in the south of Ukraine.]. Simferopol: SONAT.
6. Ladatko, V.V. (2015).Vlyjanye vozdeluvanyja rysa na soderzhanye podvyzhnyh soedynenyj azota y fosfora. [The effect of rice cultivation on the content of mobile nitrogen and phosphorus compounds in the soil.]. International Research Journal, 9 (51) part 3, 53-67. [in Russian].
7. Dobermann, A., & Witt, C. (2000). The potential impact of crop intensification on carbon and nitrogen cycling in intensive rice systems. Carbon and Nitrogen Dynamics in Flooded Soils. Laguna, Philippines: International Rice Research Institute. 1–25.
8. Kyryenko, T.N. (1984). Rysovue polja Ukraynu y puty optymyzacyy pochvoobrazovatel'nuh processov [Rice fields of Ukraine and ways to optimize soil-forming processes]. Lviv: High school.[in Russian].
9. Polupan, N.Y. (1985). Yzmenenye svojstv pochv podkul'turoj rysa [Changing soil properties under the rice culture]. Pochvovedenie, № 18, 61-67. [in Russian].
10. Stashuk, V.A., & Rokochyns'kym, A.M. et al. (2014). Rys v Ukrai'ni [Rice in Ukraine]. Kherson: Grin D.S.[in Ukrainian].
11. Dudchenko K.V., Petrenko T.M., Flinta O.I., & Dacyuk M.M. Sposib normuvannia melioratyvnykh navantazhen na grunty rysovykh sivozmin [Method of normalization of meliorative loads on rice irrigation systems’ soils]. Patent of Ukraine №131329, MPK (2019.01) GO1N 33/24. [in Ukrainian].
12. Stashuk, V.A., Rokochyns'kyj, A.M., Mendus', P.I., &Turchenjuk, V.O. et al. (2016).Rys Prydunav’ja. [Rice of the Danube: Collective Monograph]. Kherson: GrinD.S.[in Ukrainian].
13. Kol'cov, A.V., Tytkov, A. A., Suchevskyj, M.E., Barylo, V.N., & Makushyn,A.V. (1994). Agroekologycheskaja obstanovka y perspektyvu razvytyja rysosejanyja na juge Ukraynu [Agroecological situation and prospects for the development of rice growing in the south of Ukraine]. Simferopol: Krasnoperekopsk interdistrict printing house.
How to Cite
Ushkarenko, V., & Dudchenko, K. (2019). EVALUATION OF AGRO-AMELIORATIVE CONDITION OF THE MAIN TYPES OF SOILS OF RICE CROP ROTATION. Land Reclamation and Water Management, (1), 36 - 41. https://doi.org/10.31073/mivg201901-158