Does Deficit Irrigation Affect the Relation between Radiation Interception and Water Consumption for Durum Wheat (Triticum durum Desf)?

Mourad Rezig, Hatem Cheikh M'hamed and Mbarek Ben Naceur

Energy and Environment Research, 2015, vol. 5, issue 2, 36

Abstract: Total Dray Matter (TDM), Photosynthetically Active Radiation Intercepted (PARabs), Water Consumption (WC), Water use- (WUE), Radiation use efficiency (RUE) and the Relation between Radiation Interception and Water Consumption for Durum Wheat were investigate under different irrigation amount (D1= 100 % ETc; D2= 70 % ETc; D3= 40 % ETc and D4= pluvial) and during three growing seasons (2005-2006, 2006-2007 and 2007-2008). Results showed that, the cumulative PARabs decreased with deficit irrigation. In fact, D1 treatment recorded the highest cumulative PAR abs and the lowest marked under D4 treatment. Similarly, TDM and RUE were decreased with deficit irrigation. The highest RUE observed under the D1 (from 1.32 to 1.43 g MJ-1) and the lowest under D4 (from 1.17 to 1.29 g MJ-1). However WUE increased with deficit irrigation. The highest WUE were obtained under the D4 (from 3 to 4 kg m-3) and the lowest were observed under D1 (from 2.8 to 3.1 kg m-3). Significant linear relationship was found between cumulative PAR abs and cumulative water consumption with a high correlation coefficient (R2) only under the two treatments D1 and D2.

Date: 2015
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