Comparison of wheat evapotransprations measured by lysimeter, eddy covariance and water budget methods in cukurova region

This study was carried out in the research and application area of Department of Agricultural Structures and Irrigation, Faculty of Agriculture, University of Çukurova in 2014 and 2015 wheat growing season. The actual evapotranspiration of rainfed wheat was measured by using Lysimeter, Eddy Covariance and water budget methods. Seasonal evapotranspirations of wheat grown under natural rainfall conditions were measured as 368 mm by lysimeter method, 312 mm by Eddy Covariance method and 335 mm by using water budget method. In this study the value of grain yield was determined as 451 kg/da and the amount of dry matter was determined as 2229 kg/da. Harvest index (HI) was calculated as a value of 0.20. The linear relationships were obtained between cumulative evapotranspiration values of Eddy Covariance and Lysimeter with dry matter as regration coefficient R= 0.96. Close relations were obtained between evapotranspiration values measured by lysimeter and Eddy Covariance methods with 99% confidence (R=0.99).