CONTENT OF SELECTED HEAVY METALS IN SOIL IN VARIOUS AREAS OF THE SWINE FARM

Heavy metals are present not only in the highly industrialized regions, but also in natural ecosystems and farm lands. Since the productivity of farm animals increases, more and more microelements are added to the feed, which may cause their excessive accumulation in the environment. Therefore, research was undertaken to determine the degree of soil contamination with heavy metals in various areas on a swine farm. The samples for tests were collected from the following places: the swine yard and at the distance of 4 metres from the yard fence, the dung plate - at the distance of 5 and 10 m, and the fattening house - at the distance of 20 m. The samples for analysis were taken in spring from the surface layer of the soil: 0-20 cm. The content of lead and manganese in soil in various areas of the swine farm was within the limits qualifying the soil for the zero degree contamination. The highest concentration of zinc characterized the soil in the swine yard 141.8 mg . kg(-1)), which qualifies the soil for the first degree of contamination. In the other areas, the content of zinc was within the limits characteristic of the zero degree contamination. When the droppings are managed rationally, swine farms do not constitute any significant danger for the soil environment.