Vladimir LINGORSKI, Dimitar MITEV
Abstract: During the 2010–2012 period in RIMSA, Troyan (Bulgaria) the comparative testing of some perennial drought tolerant legume grasses (birdsfoot trefoil, white clover, common sainfoin, hybrid–blue lucerne and hybrid–yellow lucerne) was accomplished. It was found that best bio–productive indicators had the hybrid–blue lucerne. In the triple regime of harvesting it received 4.39 t.ha–1 green mass and 1.09 t.ha–1 dry matters, which exceeded the standard (birdsfoot trefoil) by 26.51% and 43.42%, respectively. Hybrid–blue lucerne, hybrid–yellow lucerne and birdsfoot trefoil predominated over weeds and weed infestation decreased from Ist to IIIrd haymaking.
Key words: legume grasses, drought tolerance, Central Northern Bulgaria.