Еvapotranspiration in maize for silage grown under non irrigated conditions and under optimal irrigation

Rumen Bazitov

Abstract: The aim of the study is to determine the evapotranspiration of maize for silage, grown on meadow-cinnamon soil in the region of South Bulgaria The experiment was conducted in experimental field of Agricultural institute – Stara Zagora. The variants of the experiment are as follow: 1) no irrigation; 2) irrigation by 80% of FC (field capacity) for the layer 0-100 cm. Evapotranspiration of maize for silage under non-irrigated conditions, depending on the weather conditions of the year, ranges from 363,4 mm to 370,6 mm. In the conditions of irrigation the largest share in the formation of the water consumption is occupied by the irrigation norm - on average 60.40%. Under irrigated conditions, the relative participation of the initial water reserve in the formation of ET significantly decreases.

Keywords: evapotranspiration; irrigation; maize; silage; water balance

Date published: 2021-04-23