Purpose: to study corn hybrid growth, development and yield under drip irrigation.
Materials and methods. The studies were conducted in Oktyabrsky district Rostov region in 2023–2025. The experimental design included the following variants (maize hybrids): 1 – MAS 34 B; 2 – Krasnodarsky 291 AMV; 3 – KVS 3381; 4 – Zernogradsky 354 MV; 5 – DKC 5007; 6 – Pioneer 0023. Drip irrigation was carried out. From seedling emergence to the ninth leaf formation, soil moisture was maintained at no less than 70% of the maximum permissible moisture content (MPC) in the 0.3 m soil layer. After the ninth leaf emergence and until the milky-wax ripeness (MW), soil moisture was maintained at no less than 80 % of the MPC in the 0.4 m soil layer.
Results. It was found, that among grain corn hybrids, the P 0023 hybrid demonstrated the highest plant height (217.4 cm), green mass accumulation (39.6 t/ha), and leaf-area duration (66,300 m²/ha) at the milky-wax maturity stage in the sixth variant. A decrease in leaf-area duration growth was observed in all corn hybrids at the MW stage. The mid-early hybrid MAS 34 B demonstrated minimal results: plant height was 192.1 cm, green mass accumulation was 28.8 t/ha, and leaf-area duration was 46,500 m²/ha. The difference between these two hybrids in plant height is 13.2 %, while in green mass accumulation and leaf-area duration it is more than 30 and 40 %, respectively.
Conclusions. On the base of field studies, it was determined, that green mass accumulation, leaf-area duration and linear growth were the highest in the sixth variant of the grain corn hybrid under drip irrigation. The maximum grain yield of 11.7 t/ha was obtained in the second variant of the mid-early hybrid Krasnodarskiy 291 AMV.
grain corn, hybrids, drip irrigation, maturity group, plant height, leaf-area duration, yield
Tishchenko Ya. S., Monastyrskiy V. A. Grain corn hybrid growth, development and yield under drip Irrigation in the Rostov region. Ways of Increasing the Efficiency of Irrigated Agriculture. 2025;97(3):251–266. (In Russ.).
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