Abstracts

Soil Ecosystems

On our representations, the choice of parameters for the computer database or GIS has drastic value. It depends on the set of problems and the degree of study of forest biogeocenoses. The choice of occasional and unthinking parameters for database is unprofitable occupation. It was detected that the types of the circulation of chemical elements (Zonn, 1950), agrochemical parameters (Orlov, Koshelkov, 1965), the indicators of mobile NPK (Vaichys, 1972) in soils don’t give of reliable connections neither with a floristic composition of forestations, nor with productivity of stands.

It marked the many biogeocenoses got of forest soil state, often grounded on parameters of inquests, instead of on the causes of forest formation, therefore these parameters were not saved in successional stage already after of the first fell. The relict stands were not restored any more in burn-out forest. Such information in biogeocenoses is unvaluable and to introduce it into the database or in GIS it makes no sense at all.

The auther confirms there are genuine silvicultural properties of soils, which don’t vanish from soils after fells and fires and influence on the growth of new stands. It is natural, only they can serve as indicators for the models of management forest formation in biogeocenoces and productinity of soils.

For the definition of connection between the properties of soils and their influence on a floristic composition of stands and the stores of wood the content of a humus and depth of a humic layer, soil reaction, content of the axchange Ca and Mg, the content of granulometrical fractions, available NPK and mobile Fe were investigated in various types of soils of forest biogeocenoses Middle Taiga of a subzone of Western Siberia in every genetical horizon on all depth of the soil profile. After data processing by cluster - analysis, the mentioned parameters were grouped in homogeneous classes strictly on genetical horizons. It was concluded, that the generally accepted parameters of soils, apparently, is inevitably encoded on reflectance of genetical horizons of soils. It follows, that the genetical horizons of soils just also are integral indicators of individual diagnostic criterions of soils. For creation of the database and GIS of forest soils genetical horizons should be put to their base.

Therefore, 5-7 representative and independent sings of soils arranging by the Spilam’s rang method give already possibitily to judge a composition of forestation and stores of wood with a degree of probability 90-95 %.

Based on these results the new interpretation of genesis of many soils of Siberia and assessment them silicultural properties have been recored (Sazonov, 1986). In particular, in the last work the possibility of extrapolation of the morden biotechnologies in biogeocenoses disposed for some thousand of kilometers from each other is being proved. Thus the stores of wood in some stands can be magnified in 1,5-2,0 times than natural stands.

Note. Abstracts are published in author's edition

|Home Page| |English Part|

Go to Home