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Publication Date

1977

Description

Grazing experiments were carried out in the period 1973-1975 on 16 pastures situated in different ecological and climatic conditions of Poland. Fertilization was applied at rates of 80 kg P2O5 and 100 kg K2O/ha annually and 60 kg N/ha for each regrowth (in total 240 to 360 kg N/ha/year). Average yields came up to 9 tons of absolute dry matter per hectare. These fertilizer quantities, as a rule, led to an improvement of forage quality. Phosphorus, calcium, magnesium, iron, and manganese contents increased and potassium and zinc .contents declined. The data concerning par­ticular pastures showed, however, considerable deviations from the respective standards, par­ticularly in the case of sodium (deficiency) and potassium (excess).

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Changes in the content of some mineral elements in the pasture forage under the fertilization effect

Grazing experiments were carried out in the period 1973-1975 on 16 pastures situated in different ecological and climatic conditions of Poland. Fertilization was applied at rates of 80 kg P2O5 and 100 kg K2O/ha annually and 60 kg N/ha for each regrowth (in total 240 to 360 kg N/ha/year). Average yields came up to 9 tons of absolute dry matter per hectare. These fertilizer quantities, as a rule, led to an improvement of forage quality. Phosphorus, calcium, magnesium, iron, and manganese contents increased and potassium and zinc .contents declined. The data concerning par­ticular pastures showed, however, considerable deviations from the respective standards, par­ticularly in the case of sodium (deficiency) and potassium (excess).