ДИНАМИКА СОДЕРЖАНИЯ МАРГАНЦА В ПОЧВАХ ЛИПЕЦКОЙ ОБЛАСТИ

Abstract

Manganese fertilizers increase yield and quality of many crops in black soil conditions. As evidenced by results of agrochemical soil survey of arable layer of reference areas, content of mobile manganese in acetate-buffer solution pH 4.8 is characterized as average. However, content of manganese in last (studied) period (20012003, 2005-2012) has undergone significant changes. These changes differ not only in individual areas of economy, but also depending on geographical location (Northern or southern natural area). If provision of manganese in Northern region in 2012 average was 19.0 mg/kg of soil, in South-18.6 mg/kg. moreover, in southern region, on average, all sites showed a decrease in content from 18.5 to 17.5 mg/kg. A significant decrease in 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 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 change of manganese content in soils of studied farms and areas. Thus, 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 harvest. In a complete soil survey of region of CA Lipetsk there is a gradual decrease in manganese content (1987-2012). If in fifth cycle of survey was 6% of areas with low security, 74% of average and 20% of high, in tenth cycle, respectively, was: 35.1; 58.9; 6.0% of area.