engleski

Impacts of fertilization by phosphorus and potassium and liming on soil status

Two stationary field trials were conducted on acid soil in March of 2008. Fertilization with NPK 7:20:30 (0, 1560, 3120 and 6250 kg ha-1) was applied in the trial I. Nitrogen was equalized for the treatments by CAN (calcium ammonium nitrate: 27% N + 4, 8% MgO). Hydrated lime (73% CaO + 2-3% MgO + 21% H2O) in amounts 0, 15, 30 and 45 t ha-1was used for the trial II. By PK-fertilization was decreased soil pH in KCl from 4.51 up to 4.04 and increased AL- soluble P and K (mg 100 g-1) from 6.17 P2O5 and 27.48 K2O up to 14.40 P2O5 and 42.00 mg K2O). Liming increased soil pH in KCl from 4.12 up to 7.66, while P and K status (means 18.94 P2O5 and 26.54 K2O 100g-1) were independent on liming.

P and K fertilization ; liming ; soil pH ; P and K availability ; AL-method

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