Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Antoniya STOYANOVA, Nataliа PETROVSKA, Toncho DINEV, Katia VELICHKOVA, Ivaylo SIRAKOV
A field experiment with two maize hybrids was conducted to analyze the influence of irrigation and feeding, with nutrients, on productivity, irrigation efficiency and irrigation water productivity. The experiment was conducted under non-irrigated and irrigated conditions. The object of the research are two maize hybrids: Premeo and Knezha-461. Optimizing the irrigation regime provides an increase in corn yields for grain by 237.1% in Premeo and by 233.1% in Knezha-461 compared to the non-irrigated option. Optimizing the irrigation and nutrition regime leads to an increase in productivity by 340.8% in Premeo, and in Knezha-461 by 313.5%. The corn hybrid Premeo 11.4 kg/mm stands out with the highest irrigation water productivity, followed Knezha-461 with 10.3 kg/mm, average for the study period. A trend towards an increase in the productivity of irrigation water with an increase in the productivity of the maize hybrids was found. It was established that the Premeo corn hybrid has a higher effect per 100 m3 of irrigation water, on average for all variants - 722.2 kg/ha, while for Knezha-461 the effect is 656.1 kg/ha.
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