Succession changes of temporary grass stands on set-aside land
Svobodova, M. | Santrucek, J. | Urbanec, J. (Ceska Zemedelska Univ., Prague (Czech Republic))
The mixtures of Bromus marginatus + Coronilla varia, Festuca pratensis + Lotus corniculatus, Dactylis aschersoniana + Trifolium repens, Arrhenatherum elatius + Medicago lupulina were sown in rows of 125 mm in the year 1997 in Prague (chernozem, altitude 281 m a.s.l., average precipitation 72 mm per year, average year temperature 9.3 deg C). The stands were one or three times per year cut with the mass removing or one or two times mulched. Botanical composition (by weight method), number of present species and agrobotanical groups (grasses, legumes, other dicotyledonous) coverage were measured during 6 years of vegetation. The species number was highest on plots cut 3 times (6-17), it increased linearly. The sown species share in the dry mass yield was 75-99 %, the share of grasses decreased linearly with time. The significantly highest dry mass yield was reached with Bromus marginatus + Coronilla varia when mulched two times per year (till 14 t/ha ). The stands coverage was 43-80 %.
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