Drip irrigation of sunflower in the Sofia field

Rumyna Kireva, Vesela Petrova

Abstract: A field trial with 10 sunflower hybrids was carried out on cinnamonic forest soil in the experimental field – Chelopechene, Sofia region, in 2006-2008. Sunflower hybrids are grown under non-irrigating conditions and under irrigation conditions – drip irrigation
The meteorological conditions in the period determined the number of irrigations and the irrigation and seasonal depths for the crop.
The highest yields on drip irrigation averaged over the study period are obtained from the Mura hybrids – 274 kg/dka, with the yield in 2008 reaching 305 kg/dka.
In the three years of experimentation, the hybrids “Mura”, “Musala”, “Diamant”, “Maritsa” were presented in natural conditions in the Sofian field under natural humidification (non-irrigated conditions). Meanwhile, the highest yields were obtained in the Musala hybrids – 180 kg/dka and “Mura” – 182 kg/dka, and the lowest in hybrids “Veleka”, “Yana”, “Albena” – 145-149 kg/dka
The increase in irrigation yields on average during the study period is at least the Musala (13-17%) and Mercury (17-18%) hybrids, indicating that they are resistant to drought in their critical phase. For the conditions of the Sofia field hybrids may be recommended to be grown under non-irrigating conditions.

Keywords: drip irrigation; irrigation; irrigation scheduling; Sunflower; yield

Date published: 2018-05-14