Estimation of Balance and Cycles of Nitrogen in Agricultural Ecosystems on Forest Soil of Pribaikalia Contaminated with Fluorides
A. Yu. PROKOFYEV, L. V. POMAZKINA
Abstract
It is demonstrated in small-allotment field experiments with unpolluted gray forest soils of Pribaikalia and the same soils polluted with water-soluble fluorides (6 MPC) that the pollution did not cause a decrease in the productivity of spring wheat; fluorine was accumulated only in straw. Investigations with 15N isotope revealed that pollution caused an increase in mineralization of the soil nitrogen and in gas losses; on the contrary, (re)immobilization decreased. This caused the formation of highly deficient total balance of nitrogen in soil. Efficiency of land improvement by peat and superphosphate at the background of NPK was exhibited by an increase in (re)immobilization and decrease in gas losses of nitrogen.
|
