WATER - GRAIN AND BIOMASS YIELD RELATIONS OF WINTER WHEAT IN A SEMI-ARID CONDITIONS OF TURKEY
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Abstract
The aim of this study was to determine the effect of different irrigation regime on winter wheat yield and water-use efficiency (WUE). The field experiment was carried out between the year 2009 and 2011 at Murted Basin in Turkey with 4 different irrigation treatments which was Rainfed (RF), Full irrigation (FI), Moderate irrigation (MI), and Deficit irrigation (DI). Soil moisture was measured with neutron probe. According to results average wheat yield was obtained 3.35 t ha-1, 4.54 t ha-1, 4.22 t ha-1and 4.31 t ha-1 and average harvest index was 29%, 31%, 32% 31% and 32% for RI, FI, MI and DI irrigation treatments respectively. The highest WUE value with 9.1 kg m-3 was calculated at DI treatment. A significant negative correlation was found between grain yield, total harvested biomass and the WUE. The results presented in this work suggest that the amount of soil water content affects grain yield and water use efficiency. It might be recommended that irrigation concentrated in the after heading period (DI) increase WUE in semi-arid climate condition such as Central Anatolia Region of Turkey.
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