Corn yield response to partial rootzone drying and deficit irrigation strategies applied with drip system


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YAZAR A. , GOKCEL F., SEZEN M. S.

PLANT SOIL AND ENVIRONMENT, cilt.55, ss.494-503, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 55 Konu: 11
  • Basım Tarihi: 2009
  • Doi Numarası: 10.17221/96/2009-pse
  • Dergi Adı: PLANT SOIL AND ENVIRONMENT
  • Sayfa Sayıları: ss.494-503

Özet

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; PRID-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 E-pan, respectively. PRD-100, PRD-75 and PRD-50 received 100, 75 and 50% E-pan 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/m(3), and the lowest one was found in F1 as 1.54 kg/m(3).