Yields Structure of Sown Perennial Grasses in Foothill Region of Central Northern Bulgaria

V. LINGORSKI
Institute of Mountain Stockbreeding and Agriculture, BG-5600 Troyan, Bulgaria

Abstract

LINGORSKI, V., 2001. Yields structure of sown perennial grasses in foothill region of Central Northern Bulgaria. Bulg. J. Agric. Sci., 7: 421-425

The yields structure formation of sown perennial fodder grass species with Bulgarian origin: orchard grass – (Dactylis glomerata) cv. Dubrava, tall fescue (Festuca arundinacea) cv. Albena, smooth bromegtrass (Bromus inermis) cv. Nika and perennial ryegrass (Lolium perenne) test-cv. Stranja, grown in Troyan foothill region of Central Northern Bulgaria during the period 1997-1999, was studied. Mean for the same period orchard grass cv. Dubrava was with the highest dry matter productivity (6.98 t.ha–1).
Mean by 1st haymaking the yields formation was mainly from the leaves (to 57.8%) and the stems (to 49.3%), by 2nd – respectively to 88.5% and to 75.5%, and by 3rd to 94.4% and to 12.3%.
The orchard grass monoculture had the least weeds part during the past year of investigation in comparison with the other investigation perennial grasses.

Key words: grasses, harvest-haymaking phase, dry matter, yields structure, botanical composition