In the study experimental materials according to the contents and dynamics of water-soluble organic matter in agrochernozyoms and their dependence on the properties of soils and vegetable remains were considered. The researches were conducted on the slope agrolandscape (catena) on the training farm of "Minderlinskoye" located in the central part of Krasnoyarsk forest-steppe. Trial areas were marked on the plaky part of the slope (1 pp - eluvial type of the agrolandscape), the middle slope of the slope (2 pp - transeluvial type of the agrolandscape), the lower part with the microfalls of the slope part (3 pp - transeluvial-accumulative type of agrolandscape) and a large saucer-shaped depression or depression (4 pp - trans-cumulative agrolandscape type) in the slope of this slope. The trial areas 1 and 2 were characterized by ordinary chernozyoms in a complex with lixivious, 3 - the meadow and chernozyom soil, 4 - the chernozyom and meadow soil. Soil samples for definition of stocks of vegetable remains and the content of carbon of organic substance were selected 3 times for a vegetative season of 2015-2016 from depths 0-5, 5-10, 10-20, 20-30 cm. The amount of gross carbon (Slope) was determined by Tyurin's method, water-soluble (Arch) -bichromated oxidability method in water extract at the ratio 1 (soil): 5 (wa-ter). It was shown that chemical fractionation of organic substance of soils water extract allowed to take only part of an active pool, about 1 % from the slope. Among soils of chernozyom and meadow> meadow and chernozem> ordinary chernozyom was observed gradual, statistically not significant, reduction of the pool of the arch. The content of water-soluble organic substance in 0-30 cm layer of soils was rather stable. Interdependence be-tween the quantity and quality of the vegetable re-mained coming to the soil and the content of water-soluble organic substance was established. The pool of water-soluble organic substance increased in soils with higher stocks of vegetable remains. The reduction of receipt of fresh vegetable remains led to the decrease in stocks of water-soluble OM.
catena, soil, active organic agent, water-soluble organic matter, vegetable residues
1. Bankin M.P., Bankina T.A., Zemeszirks N.E. Rol' labil'nyh soedineniy ugleroda v processah denitrifikacii i immobiliza-cii mineral'nogo azota // Pochvy Rossii: sovremennoe sostoyanie, perspektivy izu-cheniya i ispol'zovaniya: mat-ly dokl. VI s'ezda Obschestva pochvovedov im. V.V. Do-kuchaeva. i Vseros. s mezhdunar. uchastiem nauch. konf. (Petrozavodsk-Moskva, 13-18 avgusta 2012 g.) / Karel'skiy nauchnyy centr RAN. - Petrozavodsk, 2012. - Kn. 2. - S. 157-159.
2. Zhukova I.V., Zhukov Z.S. Akkumulyaciya bio-gennyh elementov v rastitel'nyh ostatkah na agrochernozemah Krasnoyarskoy lesostepi // Vestn. KrasGAU. - 2016. - № 11. - S. 78-85.
3. Kershens M. Znachenie soderzhaniya gumusa dlya plodorodiya pochv i krugovorota azota // Pochvovedenie. - 1992. - № 10. - S. 122-131.
4. Kononova M.M. Issledovaniya akademika I.V. Tyurina v oblasti izucheniya organiche-skogo veschestva pochvy // Pochvovedenie. - 1962. - № 12. - S. 1-7.
5. Lykov A.M. Vosproizvodstvo plodorodiya pochv v Nechernozemnoy zone. - M.: Rossel'-hozizdat, 1982. - 143 s.
6. Semenov V.M., Hodzhaeva A.K. Agroekologi-cheskie funkcii rastitel'nyh ostatkov v pochve // Agrohimiya. - 2006. - № 7. - S. 63-81.
7. Semenov V.M., Kogut B.M. pochvennoe orga-nicheskoe veschestvo. - M.: GEOS, 2015. - 233 s.
8. Sergeev G.M. Ostrovnye lesostepi i pod-tayga Prieniseyskoy Sibiri. - Irkutsk: Vost.-Sib. kn. izd-vo, 1971. - 262 s.
9. Smirnova N.V., Nechaeva T.V. Mineraliza-ciya zapasov pochvennogo organicheskogo ve-schestva i azota v sklonovyh agrolandshaf-tah na yuge Zapadnoy Sibiri // Pochvovede-nie - prodovol'stvennoy i ekologicheskoy bezopasnosti strany: tez. dokl. VII s'ezda Obschestva pochvovedov im. V.V. Dokuchaeva i Vseros. s mezhdunar. uchastiem nauch. konf. (Belgorod, 15-22 avgusta 2016 g.). Ch. II / otv. red. S.A. Shoba, I.Yu. Savin. - Belgorod, 2016. - S. 59-60.
10. Teyt III R. Organicheskoe veschestvo pochvy. - M.: Mir, 1991. - 400 s.
11. Tulina A.S., Semenov V.M. Ocenka chuvstvi-tel'nosti mineralizuemogo pula pochven-nogo organicheskogo veschestva k izmeneniyu temperatury i vlazhnosti // Pochvovedenie. - 2015. - № 8. - S. 952-962.
12. Tyurin I.V. Organicheskoe veschestvo i ego rol' v pochvoobrazovanii i plodorodii. Uchenie o pochvennom gumuse. - M.; L.: Sel'-hozgiz, 1937. - 287 s.
13. Tyurin I.V. K izucheniyu processa podzolo-obrazovaniya. Opyt izucheniya vodnorastvo-rimogo gumusa podzolistoy pochvy // Pochvo-vedenie. - 1944. - № 10. - S. 441-455.
14. Tyurin I.V. Voprosy genezisa i plodoro-diya pochv. - M.: Nauka, 1966. - 287 s.
15. Chuprova V.V. Uglerod i azot v agroekosi-stemah Sredney Sibiri. - Krasnoyarsk: Izd-vo KGU, 1997. - 166 s.
16. Kalbitz K., Kaiser K. Contribution of dissolved organic matter to carbon storage in forest min-eral soils // Plant Nutrition and Soil Sci. - 2008. - V. 171, № 1. - P. 52-60.
17. Wander M. Soil organic matter fractions and their relevance to soil function // Soil organic matter in sustainable agriculture / Eds. F.Magdoff, R.R.Weil. Boca Raton etc.: CRC Press, 2004. - P. 67-102.
