The effect of utilization term on the biomass production, organic matter digestibility and ergosterol content of semi-natural grass stand in the autumn and in winter
2007
Skladanka, J.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Vyzivy Zvirat a Picninarstvi
The dry matter (DM) biomass and forage quality of a grass pasture in the Bohemian-Moravian Highlands (Czech Republic, 553 m a.s.l.) was measured in late autumn and winter from 2000 to 2003. The semi-natural pasture was dominated by Festuca rubra, Taraxacum officinale, Elytrigia repens, Dactylis glomerata, Trisetum flavescens, Poa spp., Agrostis tenuis, and Phleum pratense. Biomass production and forage quality were measured in November, December, and January after one preparatory cut in June or two preparatory cuts in June and July, and in June and August. DM biomass decreased from November to January, it ranged, depending on the year and the number of preparatory cuts, from 0.37 to 3.13 t/ha in November to 0.15 to 1.36 t/ha in January. Organic matter digestibility decreased from 0.448-0.606 in November to 0.352-0.578 in January. A delayed preparatory cut resulted in an increased digestibility and decreased biomass production. Ergosterol concentration increased from 40-111 mg/kg DM in November to 110-265 mg/kg DM in January. Lower ergosterol concentrations were observed after a late preparatory cut. Forage yield and quality was statistically significantly influenced by the month of the main cut (November, December of January) as well as the month of the last preparatory cut (June, July or August).
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