[Microbiota and biogenic resources of soddy-carbonaceous soils of the Grodno Region]
2005
Marchik, T.P.(Gomel State Univ. (Belarus)) | Efremov, A.L.(Belarus State Technological Univ., Minsk (Belarus))
Based on results of the research of biogenic resources concerning the content of macro-elements, enzymatic activity and microbiota in soddy-carbonaceous soils of Grodno region (agroindustrial complex "Svisloch") was made. The typical types of forest-meadow complexes are isolated mainly, the minima are characteristic for leached subtypes. In the middle there is a podzolized type. The soddy-carbonaceous soils are formed on carbonaceous rocks and more often found as island massives in Vitebsk, Mogilev, Brest and Grodno (West parts of Belarus) regions. The contents of humus in arable horizons (3-35cm) of soddy-carbonaceous soils on the average is 3-5%, pH KC of soil suspension has acescent reaction cloe to neutral (6,0-7,8), the degree of saturation by the bases (90-95%). The content of metabolic cations is rather high with enough large capacity of absorption. The potential stores of a humus in soddy-carbonaceous soils compound: in typical - 42-44, in podzols - 31-35, in leached - 20-24kg/square m. The contents of common nitrogen compounds accordingly 2,90-3,40; 2,70-3,10; 2,60-2,90kg/square m, in which the composition of the lighthy-drolysis fraction makes uo 2,0-3,5% from common (0,05-0,11kg/square m). The content of total phosphorys makes up 568-572; 515-526; 750-780g/square m in different types of soil. The qantitative content of total and mobile phosphorus and both authentic negative correlation between the contents of a humus and the density of soddy-carbonaceous soils and positive correlation between common and lighthydrolysis nitrogen are revealed. The microbiota is submitted by the microscopical funguses up to 95% from microbial biomass, that makes 0,7-1,5% fromorganic mass or 0,3-1,0% from soil weight
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