title: [Sodium and potassium levels in the soil, grass and blood serum of bulls after irrigation of the soil with sewage water].
abstract: The main purpose of the studies was to find the influence of a long-term irrigation with the water of the Ner river, containing sewage on the content of sodium and potassium in soil, its vegetation and in the blood serum of the bulls fed on the hay from the meadows irrigated with this water. The soil irrigated with drain water and its vegetation were analysed and the bulls of the Black and White breed fed on the hay from the irrigated meadows were examined carefully. There were 30 bulla tested. Their initial average weight was 250 kilograms. The experiment was repeated twice. It lasted 93 days each time. The animals were divided into three groups. The animals from group 1 and 2 received the hay from the meadow irrigated with drain water. The animals from group 2 were fed on the hay from the meadow with a higher dose of irrigation. The animals from the third group were given the hay from the meadows which were not irrigated. The daily ration of food consisted of 5 kilograms of hay and 3 kilograms of dry beet pulp. The available forms of Na2O and K2O were determined in the soil on a flame photometer. Sodium and potassium in the samples of plants were determined using the atomic absorptive spectrophotometry method (AAS). Botanical and weight analyses were also done. Blood samples were taken once a month. Sodium and potassium in blood serum were determined by AAS method. The amount of sodium in the soil and hay on the meadows irrigated with drain water was significantly higher, and the amount of potassium was lower in comparison with the amount of sodium and potassium in the soil and hay on non-irrigated meadows. The content of sodium increased with the increase of the irrigation rate. According to the experimental fodder no changes were observed in the bulls' blood serum as regards the amount of sodium and potassium.
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000097:blood*; D008297:Male; D006109:Poaceae / Q000032:analysis; D011188:Potassium / Q000032:analysis / Q000097:blood*; D012722:Sewage; D012964:Sodium / Q000032:analysis / Q000097:blood*; D012987:Soil / Q000032:analysis
chemical_list: D012722:Sewage; D012987:Soil; D012964:Sodium; D011188:Potassium
vernacular_title: Poziom sodu i potasu w glebie, roślinności łakowej oraz surowicy krwi buhajków przy nawadnianiu gleby wodami ściekowymi.