Corn yield response to partial rootzone drying and deficit irrigation strategies applied with drip system
2009
Yazar, A.,Cukurova Univ., Adana (Turkey). Irrigation and Agricultural Structures Dept. | Goekcel, F.,Cukurova Univ., Adana (Turkey). Irrigation and Agricultural Structures Dept. | Sezen, M.S.,Soil and Water Resources Research Inst., Tarsus-Mersin (Turkey). Water Management Dept.
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 one 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. The highest water use efficiency (WUE) was found in PRD-100 as 1.77 kg/cubic m, and the lowest one was found in FI as 1.54 kg/cubic m.
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