The aim of present study was to get comparative data on forage productivity
and quality of forage of Checz cultivars of legumes in the conditions of
Northern Bulgaria and respectively to select species and genotypes with the
potential for successful introduction in the structure of forage production
in Bulgaria. Five species of forage crops were observed and the respective
cultivars: Egyptian clover (Trifolium alexandrinum L.), cv. Faraon; crimson
clover (Trifolium incarnatum L.), cv. Kardinal; annual bird's-foot-trefoil
(Lotus ornithopoides L.) cv. Junak; black medick (Medicago lupulina L.) cv.
Ekola and white melilot (Melilotus albus L.), cv. Adela. The studied legumes
differed significantly in their fodder productivity. They are ranked in the
following order of DM yield: white melilot - black medick - annual
bird's-foot-trefoil - Egyptian clover - crimson clover. The productivity and
participation of Egyptian clover and crimson clover in grasslands varied
significantly in years. The biomass of crimson clover had the highest content
of crude protein (15.24%) and the lowest of crude fiber (21.69%) and no
digestible components. According to the comprehensive evaluation of data on
productivity and forage quality of studied annual legumes, black medick could
be defined as the species with the highest potential for cultivation in the
conditions of the Central Northern Bulgaria. It is characterised by high
productivity of green mass and dry matter, it has regrowing ability, it is
distinguished by a high content of crude protein (14.92%) and crude fat
(4.66%), optimal content of neutral and acid detergent fibers (34.67 and
24.99%) and with high levels of hemicellulose content (9.68%). Energy value
of forage of that species, assessed by means of feed unit of milk (FUM) and
growth (FUG) was assessed as very high (FUM - 0.69/kg DM and FUG - 0.63/kg
DM).