Bioproductive сapacity of typical chernozem in the Left-Bank Forest-Steppe of Ukraine under favorable humid conditions
Abstract
The article presents the results of research on the assessment of modern climate change and the impact of weather conditions on the yield of main field crops when using different feeding systems and tillage. It was established that during 1991-2020 the average annual air temperature in the region increased by 1,1oC, and the annual precipitation decreased by 5%. Under such conditions, the frequency of recurrence of highly and moderately arid conditions of the growing season increased from 47% in 1961-1990 to 61% in 1991-2020, however the probability of forming a sufficient moisture supply decreased by half. Based on the results of the Climate Water Balance (CWB) assessment, it was specified that in the western part of the Left-Bank Forest-Steppe, according to average long-term data a negative WBC has been formed since June, and by the end of August its deficit reaches over 140 mm or 1,400 m3 / ha. In general, by the end of the period for 1991-2020, the deficit of WBC increased by 82 mm. Based on the information database made on the results of long-term stationary field experiment at Poltava Research Station of the Institute of Pig Farming and Agroindustrial Production of NAAS, the yield potential of main crops and the productivity of typical chernozem subject to the optimization of crop rotation and nutrient and water-air regimes, were evaluated.
It was determined that optimization of crop rotations increases plant productivity by 19%, fertilizer systems - by 19-36%, irrigation - by 94%, irrigation and fertilization - by 130-153%, and a comprehensive combination of all agronomic measures - by 200% and more. It was also established that the total productivity of crop rotation under different systems of basic tillage remains virtually unchanged and enables to obtain average by year 3.6-3.8 t kd / ha against the background of natural soil fertility. From the organic fertilizer systems, the efficiency of using crop by-products as fertilizers is 10% higher than using manure and practically does not concede to organomineral fertilizer systems. As a result of research it was found that in the region in recent decades there is a tendency of deteriorating growing conditions of main field crops, which is reflected in the formation of low yields and poorer crop rotation productivity, significant variation of these factors in terms of weather, especially when having high soil fertility.
References
2. Kontseptsiya vidnovlennya ta rozvytku zroshennya u pivdennomu rehioni Ukrayiny [The concept of restoration and development of irrigation in the southern region of Ukraine] (2014). Kyiv: TSP «Komprynt». [in Ukrainian].
3. Kontseptsiya efektyvnoho vykorystannya osushuvanykh zemelʹ humidnoyi zony Ukrayiny. Naukovi zasady [The concept of effective use of drained lands of the humid zone of Ukraine. Scientific principles]. (2015). Kyiv: TSP «Komprynt». [in Ukrainian].
4 Romashchenko, M.I., & Tarariko, Yu.O (Ed.). (2017). Meliorovani ahroekosystemy [Reclamated agroecosystems]. Nizhyn.: Vydavetsʹ PP Lysenko M.M. [in Ukrainian].
5. Romashenko, M.I., Vozhehova, R.A., & Shatkovskyi, A.P. (2017). Naukovi zasady rozvytku agrarnoho sektoru ekonomiky pivdennoho region Ukrainy [Scientific bases of development of agrarian sector of economy of the southern region of Ukraine]. Kherson: OLDI-PLJUS. [in Ukrainian].
6. Tarariko, Yu.O. (Ed). (2010). Bioenerhetychni zroshuvani ahroekosystemy. Naukovo-tekhnolohichne zabezpechennya ahrarnoho vyrobnytstva (Pivdennyy Step Ukrayiny) [Bioenergy irrigated agroecosystems. Scientific and technological support of agricultural production (Southern Steppe of Ukraine) ]. Kyiv: DIA. [in Ukrainian].
7. Tarariko, Yu.O. (Ed). (2013). Bioorhanichni systemy zemlerobstva v zoni osushennya, Rekomendatsiyi [Bioorganic systems of agriculture in the drainage zone. Recommendations]. Kyiv: DIA. [in Ukrainian].
8. Romashchenko, M.I., Saydak, R.V., &Matyash, T.V. (2019). Development of irrigation and drainage as the basis of sustainable agriculture in Ukraine in climate change/IX International scientific and technical conference «Modern problems of water management, environmental protection, architecture and construction». [ in Georgia].
9. Tarariko, Yu.O., Saydak, R.V., Soroka, Yu.V., & Vitvitsʹkyy, S.V. (2015). Rayonuvannya terytoriyi Ukrayiny za rivnem zabezpechenosti hidrotermichnymy resursamy ta obsyahamy vykorystannya silʹsʹkohospodarsʹkykh melioratsiy [Zoning of the territory of Ukraine according to the level of provision with hydrothermal resources and volumes of use of agricultural reclamation]. Keiv: TSP «Komprynt». [in Ukrainian].
10. Tarariko, Yu.O., Velychko, V.A., & Saydak, R.V. (2020). Suchasna praktyka ta perspektyvy rozvytku ahrarnoho vyrobnytstva v Odesʹkomu rehioni [Modern practice and prospects for the development of agricultural production in the Odessa region]. Visnyk ahrarnoyi nauky, 3, 32 – 46. [in Ukrainian].
11. Tarariko, Yu.O., Soroka, Yu.V., Saydak, R.V., & Lukashuk, V.P. (2019). Stan ta perspektyvy rozvytku ahrarnoho vyrobnytstva v Lisostepu v umovakh zmin klimatu [Status and prospects of agricultural production in the Forest-Steppe in the conditions of climate change]. Visnyk ahrarnoyi nauky, 6, 52 – 59. [in Ukrainian].
12. Nalychye y raspredelenye zemelʹnoho fonda v Ukraynskoy SSR. [Availability and distribution of the land fund in the Ukrainian SSR]. (1987). Kiev: HOSAHROPROM USSR. Upravlenye zemlepolʹzovanyya y zemleustroystva. [in Russian].
13. Derzhavnyy zemelʹniy kadastr Ukrayiny [State Land Cadastre of Ukraine]. (1994). Kyiv: Derzhavnyy komitet Ukrayiny po zemelʹnykh resursakh. [in Ukrainian].
14. Statsionarni polʹovi doslidy Ukrayiny. Reyestr atestativ. [Stationary field experiments in Ukraine. Register of certificates]. (2014). Kyiv: Ahrar. Nauka. [in Ukrainian].
15. Ivanova, V.M., & Kalinina, V.M. (1981). Matematycheckaya statystyka. Uchebnyk. [Mathematical Statistics: A Textbook]. (2nd ed.). Moscow: Vyshchaya Shkola. [in Russian].
