The features of technozems aggregate structure changes on a profile (р. )
Abstract
Through years of research and recultivation of landsNikopolmanganese ore basin disturbed by mining industry a lot of information body have been accumulated about the soil formation processes in rocks under their biological development. Aggregate structure of the sod-lithogenic soils has been known as significantly changed under the influence of different factors. Aggregate structure of the soil is an important characteristic which determines its environmental and agronomic functions. Technozems types specific statistical structure have been assessed by method of dry sieving features of aggregate structure distribution by layers in the following types technozems the Nikopol manganese ore basin: pedozems, sod-lithogenic soils on gray-green clays, on red-brown clays and on loesslike loams. The general assessment of a technozems condition have been made on the basis of soil structure. By means of the cluster analysis of results of research have been defined that in all types technozems distribution of fractions on the horizons can be allocated the homogeneous groups similar on the distribution on layers. The top horizons have been established to be higher maintenance of fractions by the size from < 0,25 to 5-3 mmand in the bottom horizons the maintenance of fractions from 3-5 to10 mmhave been found as being dominated. The possible reason of is that when designing binomial technozems models the condensed layer is formed when using heavy motor transportation machinery for drawing a fertile layer of soil weight, especially at high rates of humidity of substrata. Also the reason for such a distribution of soil aggregates can be biotic processes due to activity of soil fauna, development of plant roots, and natural phenomena such as freezing - defrosting of the soil.References
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