TESTING OF VARIOUS REGIMES OF IRRIGATION FURROWS IN GRAIN MAIZE

A. Stoyanova, Gr. Delchev

Abstract: The purpose of experimental research was exploring the distribution of water in the soil profile under irrigation in one and two furrows. The stability of the manifestations of each irrigation variant on the grain yield was evaluated. The study was conducted with medium early maize hybrid by FAO (390). The study included the variants: 1. Without irrigation (Control); 2. Every Furrow Irrigation (EF), 80% FC; 3. Irrigation of Every Other Furrow (EOF), M=50%; 4. Irrigation of Every Other Furrow (EOF), M=100%; 5. Irrigation of Every Other Two Furrows (EOTF), M = 50%; 6. Irrigation of Every Other Two Furrows (EOTF), M=100%; 7. Irrigation of Every Other Furrow (EOF), M=50%, without first watering; 8. Irrigation of Every Other Furrow (EOF), M=50%, without second watering; 9. Irrigation of Every Other Furrow (EOF), M=50%, without third watering. Furrow irrigation with reduced irrigation rate seems to be the best water-saving technology which uses precipitation effectively during the irrigation season of maize grain and maximum utilization of irrigation water provided stable yield. Synthesis criterion for stability YSi by Kang, taking into account both the stability and value of production, shows that in terms of technology growing, technologically the most valuable is the variant of full irrigation rate, followed by a variant with reduced irrigation rate and supply of irrigation water in the furrow.

Keywords: grain maize; irrigation; stability; water deficit; yield

Date published: 2019-04-19