Determination of sugar beet standard evapotranspiration by lysimeter method in Kabotar-Abad, Esfahan
2006
M. Panahi (Soil and Water Research Institute(SWRI), Tehran, Iran) | M. Agdaei (Esfahan Agricultural Research Center, Esfahan, Iran.) | M. Rezaei (Esfahan Agricultural Research Center, Esfahan, Iran.)
For determination of irrigated sugar beet crop evaporation (ETc) and water consumption a field experiment was conducted for three years (1991 to 1993) in Kabotar-Abad Agricultural Experiment Station. The climate was semi-arid according to Gossen method with mean annual precipitation of 90 to 110 mm. The soil was Esfahan Series with a silty clay loam texture. The crop evapotranspiration was measured in standard condition (none limiting water and nutrient) using a 2-m long, 1-m wide and 1, 2 m height drain type lysimeter based on water balance method. Sugar beet was planted in a 1000 Square meter fetch area. The planting season was from mid-April to mid-May. The annual crop was irrigated before depletion of readily available soil moisture content in root zone. The crop evapotranspiration was 1026, 1123 and 1041 mm and the total class A pan evaporation was 1326, 1344 and 1380 mm for 1991, 1992 and 1993 growing seasons, respectively. The sugar beet roots were harvested in November. The mean root yield, white sugar content, and white sugar yield, were 49.9 Mg/ha, 15.1 percent and 6.37 Mg/ha, respectively. The water use efficiency for root yield and white sugar content were 5.01, and 0.49 kg per m3 water use, respectively.
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