Corn yield response to partial rootzone drying and deficit irrigation strategies applied with drip system
A. Yazar, F. Gökçel, M.S. Sezenhttps://doi.org/10.17221/96/2009-PSECitation:Yazar A., Gökçel F., Sezen M.S. (2009): Corn yield response to partial rootzone drying and deficit irrigation strategies applied with drip system. Plant Soil Environ., 55: 494-503.
This paper evaluates the effect of partial root zone drying (PRD) and deficit irrigation (DI) strategies on yield and water use efficiency of the drip-irrigated corn on clay soils under the Mediterranean climatic conditions in Southern Turkey. Four deficit (PRD-100; PRD-75; PRD-50; and DI-50) and one full irrigation (FI) strategies based on cumulative evaporation (E pan) from class A pan at 7-day interval were studied. Full (FI) and deficit irrigation (DI-50) treatments received 100 and 50% of Epan, respectively. PRD-100, PRD-75 and PRD-50 received 100, 75 and 50% Epan value, respectively. The highest water use was observed in FI as 677 mm, the lowest was found in PRD-50 as 375 mm. PRD-100 and DI-50 resulted in similar water use (438 and 445 mm). The maximum grain yield was obtained from the FI as 10.40 t/ha, while DI-50 and PRD-100 resulted in similar grain yields of 7.72 and 7.74 t/ha, respectively. There was a significant difference among the treatments with respect to grain yields (P < 0.01). The highest water use efficiency (WUE) was found in PRD-100 as 1.77 kg/m3, and the lowest one was found in FI as 1.54 kg/m3.Keywords:partial root zone drying; deficit irrigation; water use efficiency; corn; drip irrigation; water scarcity