The author goal is to highlight the main milestones in the life and creative path of a talented scientist in the field of animal husbandry, the founder of agricultural research work and higher professional education in Ukraine, Professor V.P. Ustyantsev. The research methodology is based on the predominant use of historical and scientific analysis, as well as the biographical method as a means of reconstructing the intellectual biography of the scientist. The source base of the research covers a wide range of published and unpublished materials, it is based on archival documents and V.P. Ustyantsev's scientific papers. The scientific novelty of the publication lies in the substantiation of the scientist's contribution to the development of the physiology of feeding farm animals, the development of the problems of ensiling local forages its influence on the productivity of livestock. It is summarized V.P. Ustyantsev's contribution in the development of a program and methodology for an expeditionary survey of animal husbandry in the Kiev province, the introduction of the first state herd books as the basis for the formation of breeding in Ukraine. It is considered the development of the theory of ontogenesis, the foundations of the mineral and protein nutrition of farm animals as priority direction of his scientific heritage. The role of the scientist in the organization and activities of specialized zootechnical cathedras at the Novo-Alexandria Institute of Agriculture and Forestry, Kiev Polytechnic, Kiev Agricultural and Kiev Veterinary & Zootechnical institutes, as well as at the Moscow Institute of Horse Breeding is shown. V.P. Ustyantsev substantiated the need to introduce the course "Physiological foundations of farm animal feeding" in the vocational education program. The achievements of the scientist in the formation of the Kiev, Nosov and Polessia regional agricultural experimental stations, the All-Union Institute of Animal Husbandry are considered.

1. Bey, R. V. (2019). Development of hygiene of farm animals in Ukraine (the second half of the 19th – early 21th centuries). Relevant research of historical sciences: collective monograph. Lviv-Toruń: Liha-Pres. 31–48. DOI https://doi.org/10.36059/978-966-397-100-1/31-48.
2. Borodai, I. S. (2019). Formation and development of the science of farm animal feeding (the second half of the 19th – early 21st centuries). Relevant research of historical sciences: collective monograph. Lviv-Toruń: Liha-Pres. 49–67. DOI https://doi.org/10.36059/978-966-397-100-1/49-67.
3. Borodai, I. S. (2012). Ustjjancev Vasylj Pavlovych [Ustyantsev Vasily Pavlovich]. Istorija Instytutu rozvedennja i ghenetyky tvaryn u podijakh, faktakh, bioghrafijakh uchenykh [History of the Institute of Animal Breeding and Genetics in events, facts, biographies of scientists] / nauk. red. K.V. Kopylova. Boryspil. 316–317. [in Ukrainian].
4. Borodai, I. (2009). Rozvytok zootekhnichnoji nauky v Ukrajini v konteksti dijaljnosti profesora V.P. Ustjjanceva [Development of zootechnical science in Ukraine in the context of activities of Professor V.P. Ustyantsev]. Istorija ukrajinsjkoji nauky na mezhi tysjacholitj [History of Ukrainian science at the turn of the millennium]. Vol. 41. 28–35 [in Ukrainian].
5. Borodai, I.S. (2012). Teoretyko-metodologhichni osnovy stanovlennja ta rozvytku vitchyznjanoji zootekhnichnoji nauky [Theoretical and methodological bases of formation and development of domestic zootechnical science] / nauk. red. V.A. Verhunov. Vinnytsia. 416. [in Ukrainian].
6. Verhunov, V.A. (2018). Istorija siljsjkoghospodarsjkoji doslidnoji spravy v Ukrajini (Do 100-richchja stvorennja Nacionaljnoji akademiji nauk Ukrajiny) [History of agricultural research in Ukraine (To the 100th anniversary of the National Academy of Sciences of Ukraine)]. (Ch. 1: Tvorci ta rozbudovnyky (bioghrafichni narysy [Creators and developers (biographical essays)]. Kyiv: Aghrarna nauka. 604. [in Ukrainian].
7. Didenko, V. V. (1998). Narys istoriji Nacionaljnogho aghrarnogho universytetu (do storichchja zasnuvannja) [Essay on the history of the National Agrarian University (to the centenary)]. Kyiv : Aghrarna nauka. 175. [in Ukrainian].
8. Zubets, M. M., & Borodai, I. S. (2011). Kyjivsjka doslidna stancija tvarynnyctva «Terezyne»: istorija, zdobutky, vcheni [Kyiv Research Station of Animal Husbandry «Terezine»: history, achievements, scientists] / nauk. red. V.A. Verghunov. Vinnytsia. 208. [in Ukrainian].
9. Zubets, M. M. (2011). Uchenyj-doslidnyk V.P. Ustjjancev: jogho vnesok u stanovlennja zootekhnichnoji nauky [Researcher V.P. Ustyantsev: his contribution to the formation of zootechnical science]. Tvarynnyctvo Ukrajiny [Animal Husbandry of Ukraine]. 4. 34–36. [in Ukrainian].
10. Kyrychok, R.I., Gholikova, O.M., & Ghrycenko, Z.I. (2006). Kharkivsjkyj nacionaljnyj aghrarnyj universytet im. V.V. Dokuchajeva. 1816–2006 [Kharkiv National Agrarian University named after V.V. Dokuchaev]. Kharkiv. 367. [in Ukrainian].
11. Neiman, O. F., Zavadovskii, B.M., & Azimov, G.I. (1935). Vsesoiuznyi institut zhivotnovodstva [All-Union Institute of Animal Husbandry]. Problemy zhivotnovodstva [Problems of Animal Husbandry]. 1–2, 11–20. [in Russian].
12. Osobova sprava V.P. Ustjjanceva [Personal file of V.P. Ustyantsev] // Derzhavnyj arkhiv m. Kyjiv [State Archive of Kyiv]. F. 16. Op. 465. Spr. 4820. 16 ark. [in Ukrainian].
13. Osobova sprava V.P. Ustjjanceva [Personal file of V.P. Ustyantsev] // Centraljnyj derzhavnyj arkhiv vyshhykh orghaniv vlady i upravlinnja Ukrajiny [Central State Archive of the Highest Authorities and Administration of Ukraine]. F. 166. Op. 12. Spr. 7904. 7 ark. [in Ukrainian].
14. Ustyantsev, V. P. (1915). Materialy po obsledovaniiu zhivotnovodstva v Kievskoi gubernii [Materials for the survey of animal husbandry in the Kiev province]. Ocherk polozheniia krestianskogo zhivotnovodstva v Kievskoi gubernii [Essay on the situation of peasant animal husbandry in the Kiev province]. Kiev. Vyp. 1. 298. [in Russian].
15. Ustyansev, V. (1928). Kormove pytannja na Ukrajini: dopovidj na I sesiji naukovo-konsuljtacijnoji rady pry NKZS 4-7 kvitnja 1928 r. [Fodder issue in Ukraine: report at the first session of the Scientific Advisory Council at the PCLA on April 4-7, 1928]. Kharkiv. 25. [in Ukrainian].
16. Ustyansev, V. (1929). Naukovo-doslidcha pracja v spravi ghoduvannja siljsjkoghospodarsjkykh tvaryn [Research work in the field of feeding farm animals]. Zapysky Kyjivsjkogho siljsjko-ghospodarsjkogho instytutu [Notes of the Kyiv Agricultural Institute]. Kyiv. Vol. 4. 120–123. [in Ukrainian].
17. Ustyantsev, V. P., & Serapin, S.V. (1934). Vyrashchivanie molodniaka krupnogo rogatogo molochnogo skota [Breeding of calves of dairy cattle]. Vyrashchivanie molodniaka krupnogo rogatogo skota [Breeding of calves of cattle]. Moscow: Selkhozgiz. 26–83. [in Russian].
18. Ustyansev, V. P., Ghryghorenko, I. I., & Serapin S. V. (1928). Dosvidy z sylosuvannja burjakovoji ghychky ta ghodivleju neju molochnykh koriv [Experiments on silage of beet tops and feeding of dairy cows]. Kyiv. Vol. 12. 56. [in Ukrainian].
19. Ustyantsev, V., Shvabe, A., Tcyganov, N., & Dunaev, M. (1934). Vliianie dobavki mela i rybego zhira na mineralnyi obmen u teliat [The effect of chalk and fish oil supplementation on calf mineral metabolism]. Problemy zhivotnovodstva [Problems of Animal Husbandry], 2, 89–96. [in Russian].
20. Ustyantsev, V. P. (1934). Nauchno-issledovatelskaia rabota v oblasti podgotovki i ispolzovaniia kormov [Research work in the field of preparation and use of feed]. Problemy zhivotnovodstva [Problems of Animal Husbandry]. N 1. 95–101. [in Russian].
21. Ustyantsev, V.P. (1933). Podgotovka k otelam i sokhranenie priploda [Preparation for calving and preservation of offspring]. Problemy zhivotnovodstva [Problems of Animal Husbandry]. N 2. 16–19. [in Russian].
22. Shulha, V. (2020). General physiology formation and development as a science in Ukraine in the XIXth – during the 30-ies of the XXth century. Eastern European Historical Bulletin. Vol. 16. 36–49. DOI: https://doi.org/10.24919/2519-058x.16.210908.