INFLUENCE OF LIMING AND WASTE ORGANIC MATERIALS ON THE ACTIVITY OF PHOSPHATASE IN SOIL CONTAMINATED WITH NICKEL
TL;DRAbstract
A study was carried out on soil following a two-year pot experiment that was conducted in 2009–2010, in three repetitions in Siedlce. The experiment included the following factors: 1 – amount of Ni in soil (0, 75, 150 and 225 mg·kg-1 soil by applying an aqueous NiSO4·7H2O solution); 2 – liming (0 and Ca according to 1 Hh as CaCO3); 3 – organic waste products (rye straw at a dose of 4 t·ha-1 and brown coal at a dose of 40 t·ha-1). In each experimental year, orchard grass was the test plant and four swaths were harvested. The activities of acidic and alkaline phosphatase, pH and the content of carbon in organic compounds were determined in the soil samples collected after each grass swath and in each experimental year. It was found that Ni at 75 mg·kg-1 soil activated the enzymes under study, whereas higher doses caused their statistically-confirmed inactivation. The lowest activity of the investigated enzymes was detected in soil supplemented with 225 Ni·kg-1 soil. Liming caused an incr
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A study was carried out on soil following a two-year pot experiment that was conducted in 2009–2010, in three repetitions in Siedlce. The experiment included the following factors: 1 – amount of Ni in soil (0, 75, 150 and 225 mg·kg-1 soil by applying an aqueous NiSO4·7H2O solution); 2 – liming (0 and Ca according to 1 Hh as CaCO3); 3 – organic waste products (rye straw at a dose of 4 t·ha-1 and brown coal at a dose of 40 t·ha-1). In each experimental year, orchard grass was the test plant and four swaths were harvested. The activities of acidic and alkaline phosphatase, pH and the content of carbon in organic compounds were determined in the soil samples collected after each grass swath and in each experimental year. It was found that Ni at 75 mg·kg-1 soil activated the enzymes under study, whereas higher doses caused their statistically-confirmed inactivation. The lowest activity of the investigated enzymes was detected in soil supplemented with 225 Ni·kg-1 soil. Liming caused an incr
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