Irrigation Water Management for Sprinkler Irrigated Corn using Rooting Data Obtained by the Minirhizotron Technique


YAVUZ M. Y. , ÇAKIR R. , KAVDIR Y., Deveciler M., Bahar E.

INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, cilt.14, ss.11-19, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 14 Konu: 1
  • Basım Tarihi: 2012
  • Dergi Adı: INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY
  • Sayfa Sayıları: ss.11-19

Özet

The research, aiming to evaluate possibilities for irrigation scheduling of corn using root development data obtained by minirhizotron technique, was carried out during 2008 and 2010 on experimental fields belonging to Canakkale Onsekiz Mart University. Line source sprinkler irrigation was applied for irrigation of the experimental plots and irrigation water amount determination was based on water deficits of the actual effective root depth obtained prior to the irrigation application using the minirhizotron technique. Results of the 2 year study show that the effective root depth of the crop is around 70-75 cm until the 3rd or 4th irrigation application. Using data for root development restricted overwatering and excessive water loss compared to 90 cm root depth traditionally assumed for corn irrigation in the region. The highest grain yields were obtained from the treatment under favorable moisture conditions and yield decreased with increasing distance from the sprinkler irrigation lateral. There a linear relationship between seasonal evapotranspiration rates and grain yield, and seasonal evapotranspiration deficit and relative yield reduction, during each of the experimental years. Average value of the yield response factor (ky) for the research period was 1.34. (C) 2012 Friends Science Publishers