Vplyv zvysenej emisie arzenu na jeho obsah v pode, krmivach a zivocisnych tkaninach.
1995
Gallo M. | Gallo J. | Sommer A. | Flak P.
The influence of emissions from a metallurgical plant 5 kilometers distant from stables and pasture on the arsenic content in soil, feeds and animal tissue of fattening bulls was studied. The bulls of the first group were raised and fattened in stable, while the bulls of the second group were raised on pasture and fattened in a stable. The bulls were slaughtered at a live weight of approx. 510 kg. The length of pasturing represented 1/4 of the bulls' life. Samples from liver, kidneys, heart, lymph, musculus longissimus dorsi (mld), and musculus quadriceps femoris (mqf), from breast and thigh bones were taken after slaughter. Arsenic content was determined by atomic absorption spectrophotometry. It was observed that the As content in soil (Table 1) rose during the year, and was varied (Table 2). Its concentration was higher in grass stand than in maize silage and pelleted feed. The As content in animal tissue in both groups (Table 3) was the highest in kidneys (2.75 and 1.79 mg.kg** (-1) dry matter), and lowest in thigh bones (0.16 and 0.33 mg.kg** (-1) dry matter). Concentration of As decreased in the succession: kidneys, mqf, lymph, liver, mld, heart, thigh bone in the group raised and fattened in stable. The succession: kidneys, mqf, mld, lymph, liver, heart, breast and thigh bones was observed in the group raised on pasture and fattened in stable. The As concentrations observed were higher in all materials studied than the common concentrations given in literature. They achieved in some cases values which are considered to be toxic.
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