The results of studies of humic acids electronic spectra for various types and kinds of peat in the middle-taiga zone of Western Siberia (Khanty-Man-siysk Autonomous Circle - Yugra) are presented in the study. It was found out that the increase in opti-cal density was observed in the samples of humic acids which were extracted from the peat with a high degree of decomposition (40-65 %). At the first approximation the interpretation of received electronic spectra gives reason to range humic ac-ids in the order with increasing proportion of aro-matic structures share in macromolecules in the following order: 1) peat humic acids having a de-gree of expansion from 0 to 35 % with the content of a large number of peat-forming plants, where the extinction coefficients vary from 0.039 to 0.054 or sphagnum peat with the same degree of decompo-sition with the sphagnum containing 95-100 %, where the extinction coefficients have values be-tween 0.030 and 0.042; 2) humic acids of all types and kinds of peat with a degree up to 35 %, where the extinction coefficients are from 0.042 to 0.068; 3) humic acids of peats of all examined types and species with a degree of decomposition from 40 % to 65 %, where the extinction coefficients vary from 0.059 to 0.087. Although the method of electron spectroscopy is an important tool in the study of humification processes in peat, it has a limited in-formative value due to unresolved spectra. Thus, peat humic acids with various botanical composi-tions and various degree of decomposition are cha-racterized by similar absorption spectra in the visi-ble area in the form of a monotone increasing of absorption in short wavelength interval and differ from each other only by the absorption intensity.
humic acids, Khanty-Mansiysk auto- nomous area - Yugra, electronic ranges of absorp-tion, botanical composition of peats, taiga zone, Western Siberia, peats
1. Orlov D.S. K metodike izucheniya optiche-skih svoystv gumusovyh veschestv // Biolo-gicheskie nauki. - 1960. - № 1. - S. 204.
2. Komissarov I.D., Loginov L.F., Strel'co-va I.N. Spektry pogloscheniya guminovyh kislot // Nauch. tr. Tyumenskogo SHI. - 1971. - T. 14. - S. 75-91.
3. Gorbov S.N., Bezuglova O.S. Svoystva gumi-novyh kislot pochv urbanizirovannyh terri-toriy (na primere g. Rostov-na-Donu) // Nauch-nyy zhurnal Rossiyskogo NII problem me-lioracii. - 2013. - № 2 (10). - S. 89-103.
4. Sartakov M.P., Mironov A.A. Elektronnyy paramagnitnyy rezonans guminovyh kislot torfov Srednego Priob'ya // Vestn. Kras-GAU. - 2008. - № 3. - S. 88-91.
5. Rybachuk O.V., Osnickiy E.M., Sartakov M.P. Spektry pogloscheniya i himicheskiy sostav gumusovyh kislot torfov Hanty-Mansiyskogo AO-Yugra // Vestn. KrasGAU. - 2015. - № 10. - S. 11-16.
6. Sartakov M.P., Tihova V.D. Grafostatiche-skiy analiz i spektroskopiya YaMR13S mole-kul guminovyh kislot torfov Srednego Priob'ya // Vestn. KrasGAU. - 2009. - № 6. - S. 76-80.
7. Tihova V.D., Sartakov M.P. Termicheskaya harakteristika guminovyh kislot torfov Srednego Priob'ya // Vestn. KrasGAU. - 2009. - № 11. - S. 26-29.
8. Tihova V.D., Sartakov M.P., Komissarov I.D. Ispol'zovanie sovremennogo termicheskogo analiza dlya issledovaniya guminovyh kis-lot torfa // Guminovye veschestva v bio-sfere: tr. IV Vseros. konf. - 2007. - S. 203-207.
