Quality of Some Sugar Beet Varieties as Affected by Toshka Region Conditions, Aswan (Egypt)

Abstract

This investigation was carried out to study the chemical and technological characteristics of three sugar beet varieties namely: Oscar poly, Sultan and Univers which planted under Toshka region conditions at first time in different planting dates for two seasons 2016-2017 and 2017-2018. Samples were analyzed for the following parameters: moisture content, brix, sucrose, reducing sugars, ash, pH, K, Na,a-N, purity of juice and quality of beet sugar. From presented data, the sucrose content (on dry weight basis) ranged from 57.88 to 80.83%, reducing sugars 0.25-1.65%, brix 19.78- 32.67% and ash 0.63- 5.77% (on dry weight basis). The mineral contents were 5.71 – 8.04, 1.56- 3.42 and 1.19 - 3.63 milli equivalents/100 g beet for K, Na and a-N, respectively. Juice purity was 67.21 - 87.91, sucrose loss in waste ranged from 3.06 to 4.38%. Sucrose recovery on dry weight basis was 47.61 – 66.49% and quality of sugar beet was ranged from 78.63 to 83.49. The obtained results showed that Oscar poly variety had the highest value of purity in the two studied seasons, and sucrose recovery in the first season; while Sultan variety give the highest value of sucrose recovery in the second season