[Biogenic resources in soddy-glay soils of Brest Polesje]
2005
Antonyuk, A.S.(The National Academy of Sciences, Minsk (Belarus). Institute of Agro-Ecological Problem of Polesje) | Efremov, A.L.(Belarus State Technological Univ., Minsk (Belarus))
Due to prevalence of sandy-marsh plains, dry climate, wind activity, wind erosion of spoils of Brest Polesje is revealed in mineral soddy-glay soils of easy mechanical structure and in drained peat beds. Wind erosion is a physical process occuring as a result of air stream contact with soil cover surface. The origin and development of wind erosion depend on cumulative action of climate, relief, soil cover and vegetaation. The main reason is the wind which causes deflation. It has critical speed, which is suffient for separation of mineral particles from the ground surface. Wind erosion gets maximum development in spring when big spaces become open and unprotected by forest belts while meteorological conditions are rather favorable for the development of erosion processes. Negative influence of erosion process consists not only in degradation of soil cover and reduction of productive ability of soils, but also in significant deterioration of the ecological situation. Potencial biogenic resources of agrophitocenosis on soddy-glay soils of water-glacial nature in the Brest Polesje are the following: humus - 9-14-19kg/square m, nitrogen - 1,20-1,50kg/square m, phosphorus - 300-560g/square m, where mobile phosphorus is 18-40% from the total, K2O - 53-80g/square m, and microelements: Zn - 3-7g/square m, Cu - 2-4g/square m, B - 0,5-1,0 g/square m in a meter layer. The microbe biomass of these soils is: 96-120-188g/square m, which a maximum in carbonate variant of soddy-glay soils. The bacterial biomass makes up to 10-30% of the total biomass of microorganisms, the potential biomass of microbiota makes up 5-7% from the weigth of organic substance, stocks of organic chemistry within the limits of 0,6-1,4% from the weight of soil. The content of the restored and oxidized forms of ascorbic acid makes up 0,0003-0,0005% and 0,0004-0,0007% from the weight of organic substance
显示更多 [+] 显示较少 [-]