The article presents the results of three-factor experiment on corn crops of local selection Birsu, Alitet 2, Guran 2 and hybrids of foreign selection Moldavskiy 215 SV, Р 7515, Р 8521 and Р 7460, on different mineral nutrition backgrounds and two sowing dates in the conditions of Khabarovsk krai. The studies were carried out in 2021–2022 on the experimental field of the Far Eastern Agricultural Research Institute. The soil of the experimental section was mead-ow-brown, heavy loamy soil. The experiment was prepared in fourfold repetition. On average, the growing season lasted approximately 108 days. The highest grain yield, up to 125.3 c/ha was noted on the mineral nutrition background No.2 (N110P110K90) and No.3 (N130P130K90). Increased dose of mineral fertilizers on background No.3 led to a slowdown in the onset of all phases of corn development by an average of 3–5 days in comparison to plants on backgrounds No.2 and No.1 (N90P90K90). In the conditions of Khabarovsk krai, the full ripeness of grain occured at the beggining of the first ten days of September in the varieties of selection of the Far Eastern Agricultural Research Institute – Birsu, Alitet 2, Guran 2 and hybrid Moldavsky 215SV, while hybrids Р 7515, Р 8521 and Р 7460 reached only wax ripeness during this period. It was noted that the greatest influence on yield indicators and morpholobiological characteristics had varietal characteristics (69.98 %) and the dose of mineral fertilizers (5.2 %), rather than sowing time (1.38 %). New varieties of local selection Alitet 2 and Guran 2 can be recommended for introduction into production in Khabarovsk krai.

Lukashina Anastasia A.

1. Semykin V. A., Pigorev I. Ya., Oksenenko I. A. Vozdelyvanie kukuruzy na zerno bez gerbicidov [Cultivation of corn for grain without herbicides]. Sovremennye Naukoemkie Tekhnologii. – Modern High Technologies, 2008; 4: 44 (in Russ.).
2. Shpaar D. (Eds.). Proizvodstvo grubyh kormov [Production of roughage], Torzhok, Variant, 2002, 360 p. (in Russ.).
3. Sabirova T. P., Sabirov R. A. Formirovanie produktivnosti kukuruzy v zavisimosti ot udobreniy i biopreparatov [Formation of corn productivity depending on fertilizers and biological products]. Proceedings from Resource-saving technologies in agriculture: III Mezhdunarodnaya nauchno-prakticheskaya konferenciya – III International Scientific and Practical Conference. (PP. 89–97), Yaroslavl, Yaroslavskaya gosudarstvennaya sel'skohozyajstvennaya akademiya, 2018 (in Russ.).
4. Zubrev A. I. Intensivnaya tehnologiya vozdelyvaniya kukuruzy v Habarovskom krae: metodologicheskie rekomendacii [Intensive technology of corn cultivation in the Khabarovsk krai: methodological recommendations], Novosibirsk, Sibirskoe otdelenie Vsesoyuznoj akademii sel'skohozyajstvennyh nauki imeni Lenina, 1990, 72 p. (in Russ.).
5. Kolomeychenko V. V. Kormoproizvodstvo: uchebnik [Feed production: textbook], Sankt-Peterburg, Lan, 2015, 656 p. (in Russ.).
6. Celujko O. A., Medvedeva V. I. Zavisimost' massy 1 000 zyoren sel'skohozyajstvennyh kul'tur ot udobrenij [Dependence of the mass of 1 000 grains of agricultural crops on fertilizers]. Izvestiya Orenburgskogo Gosudarstvennogo Agrarnogo Universiteta. – Izvestiya Orenburg State Agrarian University, 2015; 3 (53): 58–60 (in Russ.).
7. Mameev V. V., Nesterenko O. A., Dronov A. V., Torikov V. E., Petrova S. N. Effektivnoe primenenie mineral'nyh udobrenij kompanii "Fosagro-region" v agrocenozah kukuruzy na seryh lesnyh pochvah Bryanskoj oblasti [Efficient use of mineral fertilizers by "Phosagro-region" in corn agrocenoses on gray forest soils of the Bryansk region]. Vestnik Bryanskoj gosudarstvennoj sel'skohozyajstvennoj akademii. – Bulletin of the Bryansk State Agricultural Academy, 2022; 2(90): 14–21. (in Russ.).
8. Nevzorov A. I., Nevzorov M. A. Dejstvie razlichnyh doz i sposobov vneseniya mineral'nyh udobrenij na urozhajnost' kukuruzy na silos [The effect of various doses and methods of applying mineral fertilizers on the yield of corn for silage]. Nauka i Obrazovanie. – Science and Education, 2021; 4; 2: 416 (in Russ.).
9. Amodu J. T., Akpensuen T. T., Dung D. D., Tanko1 R. J., Musa A., Abubakar S. A. [et al.]. Evaluation of maize accessions for nutrients composition, forage and silage yields. Journal of Agricultural Science, 2014; 6; 4: 178–187.
10. Bumbar I. V., Shchegorets O. V., Sinigovskaya V. T., Epifantsev V. V., Kuznetsov E. E., Kuvshinov A. A. [et al.]. Optimization of agrotechnical terms of harvesting of crops, design and operating parameters of crop-harvesting machines under conditions of the Amur region Russian. Federation Plant Archives Journal, 2018; 18 (2): 2567–2572.