Productivity of perennial grass sward and quality of forage | Zālāja zelmeņa ražība un lopbarības kvalitāte
2004
Antonijs, A., Latvia Univ. of Agriculture, Skriveri (Latvia). Skriveri Research Centre
Research results show, that liming of soils and applied mineral doses, changed not only productivity of a grass but also botanical composition and quality of a grass sward. Mineral fertilizer N300P150K225 provided the highest yield of dry matter - 10,9-15,3 t haE-1 and optimal botanical composition of a sward. Fertilizer N0P100K150 provided only 4.9 t haE-1 dry matter yield but increased white clover content in a sward up to 46 per cent. On acid soils (pH 3.5), dry matter yield was 7.5 t haE-1 and there was observed disappearance of sown valuable grasses out of the sward and increase of weed plants - Agrostis vulgaris With, Rumex acetosa L., Deschampsia caespitosa P.B. a. o. Liming of soils increased dry matter yield in treatments with high doses of N (300-400) fertilizer. Without potassium fertilizer Agrostis vulgaris With was the prevalent plant in a perennial grass sward.
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