Measurement of sugar beet water requirements by lysimeter method in Mashhsd
2007
M. Shahabifar (Assistant professor of Soil and Water Institute- Iran) | M. H. Rahimian (Instructor of Agricultural and Natural Resources Research Center, Khorasan Rzavi)
For determining sugar beet water requirements, this work was conducted at the Agricultural Research Station of Torog in Mashhad for 3 years. Crop water requirement was measured by a drainage type lysimeter with dimension of 2*2*1 m. In order to reduce side effects, an area about 1600 m2 around the lysimeter (as a guard) was cultivated with sugar beet. Soil water content was measured by tensiometer. Results showed that sugar beet water requirement were 1188, 1348 and 1092 mm during the three growing seasons (1997-1999) with the mean of 1221 mm. Rain were 96, 138.3 and 61.2 mm during the three growing seasons. The mean of root and gross sugar yield were 56.5 and 10.05 t/ha, respectively. The values of water use efficiencies regarding root and sugar yield were 4.63 and 0.82 kg/m3, respectively. Based on results, the value of hydromodol was 1.14 l/s/ha and this value is necessary for irrigation system design and irrigation projects.
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