FOSFORO IR KALIO BALANSŲ PROBLEMA EKOLOGINĖS GAMYBOS ŪKIUOSE IR JOS SPRENDIMO BŪDAI
PROBLEMS OF POTASSIUM AND PHOSPHORUS BALANCE AND SOLUTIONS

Summary/Abstract: Negative balance NPP received in organic farming system applying manure as well as growing legumes. Onetime application of 40 t ha-1 norm of manure per four years unsecured the positive PP balance. Fertilising plants with potassium certified mineral fertilisers the potassium balance is positive, but nitrogen and phosphorus – negative. The balance of phosphorus more depended from the norm of fertilisers, but not from the form of it. Application of phosphorite powder ensured positive balance of phosphorus in the soil, but the balance of nitrogen and potassium was negative. The size of phosphorus balance depends from the norm of phosphorite powder, applied to the soil.

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