Вдовиченко В.А., Бахмет О.Н.
Влияние сплошных рубок леса на трансформацию органического вещества почв Карелии
// Известия Уфимского научного центра РАН. № 3(1). 2017. C. 41-44
Vdovichenko V.A., Bakhmet O.N. Impact of forest cuttings on transformation of soil organic matter in Karelia // Proceedings of the RAS Ufa Scientific Centre. No 3(1). 2017. Pp. 41-44
Key words: clear-cuttings, natural regeneration, podburs, physico-chemical properties, organic matter, litter
A significant amount of scientific papers devoted to the study of soils under forest cuttings there is enough information about restoration of soils formed on bedrocks is published. Therefore, the aim of the research was to study morphological and physico-chemical characteristics of soils developed on bedrocks after clear-cutting of pine stands. The soils of fresh felled area and produce hardwoods formed on site during 9 -, 20-and 40-year-old cuttings ofpine stands located in blueberry forest were the objects of the study. The most considerable changes were revealed in the forest litter and the upper mineral soil horizons after logging operations. Despite the increased number of crop and logging residues, the degree of mineralization and humification of organic matter in the forest litter is low, as indicated by the ratio C/N, as well as the content of lignin and cellulose. Removal of woody vegetation led to a changes of hydrothermal regime and as a consequence led to the migration of organic matter down the soil profile forming the humus horizon A. In the root layer were still high reserves of organic matter. In soils formed under of 9-year-old hardwoods, there was a narrowing of the C/N ratio and low content of lignin and cellulose, indicating a high intensity ofprocesses of transformation of organic matter in forest litter. Migration of organic matter led to the appearance in the soil profile of the transition AE horizon and eluvial horizon E. After a prolonged period of rest following the anthropogenic impact there was a gradual increase in the thickness of the forest litter due to the increased amount of litterfall coming to the topsoil and a decrease in the intensity of mineralization and humification of organic matter. In the recovery process of the soil decreased acidity and increased the content of total carbon and nitrogen in the mineral horizons. After a prolonged period of rest following the anthropogenic impact reserves of organic matter in the upper organogenic horizon increased. The reserves also become more ampelin the 30 cm layer of the rooting zone.
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