Humus stage of virgin and cultivated chernozems of the forest-steppe and steppe of Ukraine
Keywords:
humus, labile humic substances, mobile organic matter, approximation dependenceAbstract
The article shows the results of humus stage evaluation in chernozem typical and chernozem ordinary under various types of anthropogenic impact. The approximation dependences in the systems "soil humus – productivity of plant remains," "humus - biogenity" are built and tested in the real conditions of the National reservations "Mikhailivska tsilyna" and "Khomutovska tsilyna". It was found that intensive anthropogenic use of arable land during 80 years has led to reduction of humus on 27%, decreasing of mobile organic matter up to 5 times compared to the absolute virgin. Mineralization of soil organic matter goes due to the reduction of labile humic substances up to 1.5 - 2.4 times in chernozem typical of the Forest-Steppe and up to 1,2-1,3 times in chernozem ordinary of the Steppe soil-climatic zone.References
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