Original scientific paper QUALITY OF POTATOES GROWN IN VARIOUS REGIONS OF SERBIA AS INFLUENCED BY HEAVY METAL AND PESTICIDE RESIDUES CONCENTRATIONS

Abstract: It is possible to decompose starch into monosaccharides by the method of acid starch hydrolysis. By applying appropriate chemical procedure, a main solution is obtained, from which aliquots are taken after filtration to determine of the present glucose according to Luff-Shoorlu method. The analysed potatoes of cv. Desiree, grown on various sites in Serbia, have starch content that corresponds to available literature data. The highest starch content is found in potatoes from Ivanjica and Novi Pazar, i.e. from the areas where climate factors, air temperature, and land relief are favourable for potato growing. Lower starch contents are found in potatoes grown in flat areas with warmer climate and drier periods. Those are sites in PKB-Belgrade, Smederevo, Dobanovci and Mrčajevci areas, where the values obtained by experimental procedure are very similar. The lowest starch content is found in potatoes from Belegiš and Guča sites, where starch content is lower than normal from literature values, which may be explained by some special causes (climate, location, irrigation)