Effect of Mineral Fertilizers on Halogen Content in Environmental Objects
Changes in the concentrations of ghalogens (fluorine, chlorine, iodine) in soil and in the plants of agrocenosis were studied. It was established that the introduction of fertilizers promotes a substantial (by 29-32 %) increase in the total fluorine content in the upper (0-20 cm) soil layer; the level of water-soluble fluorine increases noticeably within the whole soil layer under investigation (to the depth of 1 m). The introduction of potassium fertilizers causes a substantial increase (by 20-25 %) of chlorine content in the soil of agrocenosis with its uniform distribution over the soil profile. The total level of iodine in the upper soil layer somewhat increased, while the concentration of water-soluble iodine decreased substantially (by 40-50 %). The use of potassium fertilizers in combination with phosphorus-containing ones promotes a decrease in fluorine concentration in vegetable products; the consumption of chlorine and iodine by plants increases substantially under these conditions.