Dynamics of the content of manganese in the soils of the lipetsk region

Manganese fertilizers increase the yield and quality of many crops in black soil conditions. As evidenced by the results of agrochemical soil survey of the arable layer of reference areas, the content of mobile manganese in the acetate-buffer solution pH 4.8 is characterized as average. However, the content of manganese in the last (studied) period (20012003, 2005-2012) has undergone significant changes. These changes differ not only in individual areas of the economy, but also depending on the geographical location (Northern or southern natural area). If the provision of manganese in the Northern region in 2012 the average was 19.0 mg/kg of soil, in the South-18.6 mg/kg. moreover, in the southern region, on average, all sites showed a decrease in content from 18.5 to 17.5 mg/kg. A significant decrease in the content of manganese in 2007, it was noted SHP "the dawn" Dolgorukovsky district, "five-year plan", terbunskiy district, respectively, and 20.4 to 10.1 and 17.2 in 14.0. However, in the Northern region from 2005 to 2012 there was an increase in Mn content by 4.0 mg/kg (from 15.0 to 19.0 mg). The structure of sown areas had a significant impact on the change of manganese content in the soils of the studied farms and areas. Thus, the sugar beet in recent years (2014-2015) in Dobrinska area was 30 024 ha, in Lebedyanskiy - 10 282, in Gryazinskiy - 7000, in Lipetsk-6 622 hectares of Sugar beet is characterized by high consumption and removal of manganese with the harvest. In a complete soil survey of the region of the CA "Lipetsk" there is a gradual decrease in manganese content (1987-2012). If in the fifth cycle of the survey was 6% of the areas with low security, 74% of the average and 20% of the high, in the tenth cycle, respectively, was: 35.1; 58.9; 6.0% of the area.

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