Dinamika osnovnykh biokhimicheskikh elementov v klubnyakh kartofelya v protsesse khraneniya | Dynamics of the main biochemical compounds of potato tubers during the storage
2014
Zavadskaya, O., National University of Bioresources and Nature Management, Kiev (Ukraine) | Kovtun, A.
Nutritional and biological value of potato tubers is determined by the content of basic biochemical components, and primarily dry matter, carbohydrates, proteins, vitamins, etc. The amount of biologically valuable components also determines the suitability of tubers for processing or for long-term storage and it depends very much on the varietal characteristics. In this study, different potato varieties grown in the conditions of southern Polissya of Ukraine, were investigated according to their biochemical and organoleptic indices before and after the long-term storage. Six potato varieties were used in the experiment, and namely: three varieties of German origin(Adretta, Bellarosa, Vineta), two domestic varieties(Svitanok kyivs'kui, Borodyans'ka rozheva) and one Dutch variety (Condor). The highest nutritive and biological value after six months of storage was recorded by the tubers of the varieties Svitanok kyivs'kui (control variant) and Vineta. A high content of starch (18.6and 17.2%, respectively) and ascorbic acid (15.5 and 15.6 mg%, respectively) was maintained in these two varieties. A close direct correlation between the starch content and taste of boiled tubers was established. As a result of the correlation analysis it was revealed that the sugar content in potato tubers significantly affects their susceptibility to rotting (r = 0,84 ± 0,11). After six months of storage, the tubers of Vineta variety received the highest score for the complex of organoleptic characteristics. Consequently, for long-term storage, it is more advisable to grow the potato varieties Vineta and Svitanokkyivs'kui.
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