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Registration Number

0221U101194, 0119U003641 , R & D reports

Title

To investigate the irrigation regimes of corn hybrids different ripeness groups on the systems of subsoil irrigation

Head

Pysarenko Pavlo V,

Registration Date

17-01-2021

Organization

Institute of Irrigated Agriculture of the National Academy of Agrarian Sciences of Ukraine

Description

The object of the research is the process of the formation of the productivity of corn with the subsoil method of irrigation. The purpose of the work is to substantiate irrigation regimes for maize hybrids of various ripeness groups on subsurface irrigation systems for the conditions of the Southern Steppe of Ukraine, which will ensure the effective use of irrigation water and its rational use, increase the yield and quality of grain, and increase the profitability of production. As a result of the research, the following have been developed: an information base of irrigation regimes for maize hybrids of various ripeness groups on subsurface irrigation systems. The irrigation regimes for maize hybrids of various ripeness groups on subsurface irrigation systems for the conditions of the Southern Steppe of Ukraine are scientifically substantiated. It has been established that the optimal mode of subsoil drip irrigation is compliance with the pre-irrigation threshold of the soil at the level of 90% lowest moisture capacity for hybrids of all maturity groups. In variants with a pre-irrigation threshold of 80% lowest moisture capacity, the water consumption coefficient for subsurface drip irrigation is on average 1.5 times lower than for sprinkling, and the total water consumption decreased on average by 547 m3/ha. The use of subsurface drip irrigation with a pre-irrigation threshold of 80% lowest moisture capacity provides an increase in yield by an average of 3 t/ha compared to sprinkling. With a pre-irrigation threshold of 80% lowest moisture capacityHB, on average, the yield exceeds by 3 t/ha than on subsurface drip irrigation with a pre-irrigation threshold of 70% HB, and decreases by 1 t/ha than in the variant on subsoil drip irrigation with a pre-irrigation threshold of 90% lowest moisture capacity.

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Bidnyna Irina O
Roy Sergey