Effect of different storage condition on chemical composition of sugar beet roots

الملخص EN

Sugar beet crop is a crop that has a rapid deterioration in its chemical and technological properties after harvest, so this crop cannot be stored in open air.Therefore, the chemical changes and other defeats, of beet roots, were studied during a storage period at 28 days under different conditions (storage in sunlight - storage in the shade) with different treatments covering with beet throne - rice straw and without covering (control).The obtained data indicated that the beet roots contain 64.4-77.9% moisture, 0.76-2.49% ash, 0.639-2.822% fiber, 18.83-27.6% total soluble solids, 17.23-10.06% sucrose, 0.43-2.42% reduced sugars, 1.4-2.9% alpha amino nitrogen.

The moisture content of the sugar beet roots, was decreased accompanied by an increase in the daily weight loss rate and an increase in the ratio of total soluble solids, where the best results in the roots covering with beet throne and stored in the shade.

Furthermore, decreasing the sugar content as a result of breathing and enzymatic activity, during the storage period.

Also, the ratio of sucrose uptake was decrease due to the increase of impurities of alpha amino nitrogen.

The data of statistical analysis showed that the invertease enzyme activity significantly increased with significant differences (P<0.05) in all the treatments used in the study.

However, the lowest enzyme activity was found the treated roots with throne cover and stored in shade.