Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Raisa VOZHEHOVA, Yurii LAVRYNENKO, Tetiana MARCHENKO, Olena PILIARSKA, Viktor SHARII, Andrii TYSHCHENKO, Olesia DROBIT, Serhii MISHCHENKO, Mykola GRABOVSKYI
The results of research on the influence of irrigation methods and regime on the processes of total water consumption and irrigation efficiency in the cultivation of maize hybrids of different FAO groups in the Southern Steppe of Ukraine are presented. It is confirmed that the method of irrigation, the genotype of the hybrid significantly affects the formation of water regime of the soil and the productivity of corn. The use of drip irrigation provides the highest levels of grain yield (16.09-16.72 t·ha-1) at the lowest specific water consumption for the formation of the unit of yield (water use efficiency) – 365.90-376.13 m3·t-1, the highest payback of irrigation water by yield increase (3.95-4.16 kg·m-3) when using FAO 400-440 hybrids adapted to irrigation conditions. According to the absolute parameters of irrigation water consumption, surface drip irrigation is the most economical. Hybrids with adequate response to the level of soil moisture and provide grain yield: without irrigation - 2.89-3.01 t·ha-1 (drought-resistant), with water-saving irrigation regime - 9.45-9.51 t·ha-1 (homeostatic type), with the optimal irrigation regime - 14.85-16.72 t·ha-1 (intensive type).
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