Investigation on the mineral composition and burning properties of oriental tobacco of Krumovgrad ecotype

Radka Bozhinova, Violeta Nikolova, Nikolay Nikolov

Abstract: In a study conducted in 2021, the influence of different microdistricts of the Nevrokop region on the mineral composition and smoking characteristics (chemical composition of the leaves, burning properties and tar in the smoke) of two oriental tobacco varieties from the Krumovgrad ecotype was investigated. The content of potassium, calcium and magnesium in tobacco varieties differed significantly between microdistricts. The results showed strong negative relationship between the concentration of potassium in the tobacco and tar content in the smoke (r= -0.998**), while the relationship between magnesium and tar was positive (r= +0.611*). The overall evaluation of the chemical analysis data showed a low level of nicotine content in both varieties, higher in reducing sugars and moderate in total nitrogen. The samples were analyzed for the content of inorganic ingredients with a proven influence on the combustibility of tobacco. A grouping of the investigated tobaccos from the different micro-districts of the Nevrokop region was carried out according to the manifestation of burning properties. Based on the values of the indexes of burning and the ranks awarded, the varieties Krumovgrad 90 from Blatska and Krumovgrad 58 from Valkosel were distinguished with the best characteristics.

Keywords: , macroelements; burning properties; chemical composition; microregion; oriental tobacco varieties; tar

Date published: 2023-03-27