ИСТИНА

The accelerated erosion from the arable land during the period of intensive land use (the last 300 years) let to formation about 700 t ha-1 buried soils, mostly in the dry valley network at the Chernozem soil belt of the European Russia, forming a layer of stratozems with an average thickness of 0.9-1.0 m. The amount of organic carbon, washed and buried with those soil matter is about 18 t ha-1. Mineralization of this organic carbon led decrease its content in time and to carbon emission to atmosphere. The calculated modern carbon emission from buried soils (in the form of CO2) is about 0.05 t ha-1 per year. This is less than 2 percent of microbial respiration of modern soils of the steppe zone of Russia. Despite the rather large amount of organic carbon buried with the washed-out soils, the modern emission of carbon dioxide from this formed by accelerated erosion pool of carbon is small, does not affect significantly on the CO2 budget in atmosphere.