EVOLUTION OF HUMUS IN YOUNG SOILS OF MINING DUMPS (RUSSIAN NORTH WEST) AFTER FERTILIZATION BY ORGANIC AMENDMENTS

Research output

Abstract

The effect of amendment of spoilbanks substrata by organic amendments on soil formation and organic matter development were studied in chronosequences of soils, formed on different types of mining dumps on the territory of quarries of the Russian North-West. The reclaimed soils were located on lime-containing loams and glaciolacustrine sands. The first type of substrata was reclaimed by plugging of turf and further revegetation (series of 1-3-10-19-23-35 years old soils). The second type of parent materials are presented by two types of reclamation: surface amended 3-8-15 years-old soils and 1-2-15 years-old soils with plugged material of forest floor. Amendment of grounds by organic matter revealed as measure which assist to organic matter accumulation, intensification of soil formation and revegetation. Soils, amended by plugging of organic matter shows the tendencies of mineralization and humification of organic materials. The CHA: CFA ratio in these soils increases (0,20-0,66-0,74 for loams and 0,45-0,54-0,93 for sands), the free and mineral part connected humic acids accumulates in the age row, also the humus stability to oxidation were reveal as increases. Amendment of soils resulted in increasing of aggressive fulvic acids (FA) fraction content and increment of soils acidity. The last one changes from the prevailing of actual forms to potential, which is caused by soil sorption complex development. In case of the surface soil amendment by forest floor materials there wasn't the evident pedological effect, but just increasing of speed of revegetation. The general trend of organic matter evolution in all investigated soils is the increasing of deepness of humification, gradual decreasing of fuvlic acids content, relative accumulation of nitrogen and increment of humus stability to oxidation.
Original languageEnglish
Pages (from-to)2367-2378
JournalResearch Journal of Pharmaceutical, Biological and Chemical Sciences
Volume8
Issue number2
Publication statusPublished - 1 Mar 2017

Scopus subject areas

  • Environmental Science(all)

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