1 Институт физико-химических и биологических проблем почвоведения РАН, Российская Федерация, 142290, Московская обл., Пущино, Институтская ул., 2 2 Санкт-Петербургский государственный университет, Российская Федерация, 199034, Санкт-Петербург, Университетская наб., 7-9 В растительной подстилке и минеральных слоях почв (подбур, дерново-подбур, глеезем, литозем) четырех катен северной и южной экспозиции сельгового ландшафта северо-западного Приладожья, локализованных на разном удалении (300, 500 и 2000 м) от источника аэротехногенного загрязнения (гранитный карьер), определяли углерод микробной биомассы (С мик ) методом субстрат-индуцированного дыхания, скорость базального (микробного) дыхания (БД) и рассчитывали микробный метаболический коэффициент (qCO 2 = БД / С мик ). Показаны высокая биогенность растительной подстилки и низкая -соответствующих минеральных слоев почвенного профиля хвойных лесов. Почвы аккумулятивной части изученных лесных ландшафтов характеризуются высоким С мик и БД по сравнению с транзитной и автономной. Изучено влияние аэротехногенного загрязнения от горнодобывающего предприятия на микробный компонент почвы, выраженное снижением С мик и БД преимущественно в растительной подстилке лесов. Библиогр. 13 назв. Ил. 1. Табл. 6.Ключевые слова: почва, углерод микробной биомассы, базальное дыхание, микробный метаболический коэффициент, растительная ассоциация, аэротехногенное загрязнение, горнодобывающее предприятие.Th e microbial biomass carbon (C mic ) by substrate-induced respiration method (SIR), the basal (microbial) respiration rate (BR) and the metabolic quotient (qCO 2 = BR / C mic ) were calculated from samples of plant litter and mineral layers of forest soils (Podburs, Sod-podburs, Gleyzems, Litozems) of four catenas of northern and southern exposure of selgovy landscape in the Northwest Priladozhje area. Sample sites were located at diff erent distances (300, 500 and 2000 m) from a source of aerotechnogenic pollution (a granite quarry). High levels of biogenecity were found in plant litter, low ones in corresponding mineral layers of the soil profi le in the pine forests examined. Soils of accumulative parts of the landscape were characterized by higher C mic and BR compared to transit and autonomic ones. Th e impact of aerotechnogenic pollution from the granite quarry on soil microbial component was found, it was expressed by decreased C mic and BR mainly in forest plant litter. Refs 13. Fig. 1. Tables 6.

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The soils of the Kingiseppsky district of the Leningrad region were studied in the zone of influence of the production of phosphorus fertilizers at a distance of up to 5 km from the pollution source. In 43 soil samples, the total content and mobile forms of heavy metals, sulfur, fluorine, phosphorus, calcium, magnesium, carbon, actual and potential acidity were determined. Three types of territories have been identified – conditionally background, reclaimed quarries, large man-made objects - phosphogypsum dumps and tailings. Exceedances of the MPC of mobile forms of elements in the conditionally background territory were revealed for copper, and for man-made objects - for manganese, copper, lead, nickel and zinc. The maximum gross content (in mg/kg) of barium (877), cadmium (1.5), copper (63), nickel (105), strontium (17,000), vanadium (218), zinc (107), antimony (1 ,86), chromium (103), phosphorus (13904), sulfur (1100) are typical for soils of technogenic objects. Barium, cobalt, manganese, lead, scandium, iron are evenly distributed over the study area. The average gross content of barium is 530, cadmium - 0.19, cobalt - 6, chromium - 32, copper - 14, iron - 22834, nickel - 16, manganese - 510, lead - 21, antimony - 0.36, scandium - 7 , vanadium - 48, zinc - 49, strontium - 627 mg/kg. At the same time, barium and lead are characterized by low variation; medium - cobalt, chromium, iron, manganese, scandium, zinc; high - copper, nickel, antimony, vanadium; abnormally high - cadmium and strontium. Medium mobility is characteristic of barium, increased mobility is characteristic of lead and nickel, manganese, copper and zinc are characterized by high mobility. Concentration coefficients of chemical elements in the soils of large technogenic objects calculated from the zonal background for podzolic soils: V(1.03); Zn(1,2); Ni(1,2); Cu(1.4); Sb(1.5); Pb(1.7); F(7,3); Ba(8); P(11.6); Sr(12.9); Ca(38.6). On the conditionally background territory: Zn (1,2); P(1,3); pb(2,2); F(1.5); Ba(12). Significant soil pollution and a decrease in the amount of organic matter are observed at man-made objects. In the conditionally background area, the amount and concentration of pollutants are decreasing. It is necessary to constantly monitor the ecological state of soils, especially their chemical pollution.

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