INFLUENCE OF DIFFERENT WAYS OF HARVESTING ON SOME FORAGE PRODUCTIVE AND CHEMICAL INDICATORS FOR A NATURAL MEADOW OF AGROSTIS CAPILLARIS-FESTUCA FALLAX TYPE IN THE RHODOPE MOUNTAINS (SOUTHERN BULGARIA)

The experiment was conducted with a natural meadow of Agrostis capillaris-Festuca fallax type in the Rhodope Mountains (Smolyan region, Southern Bulgaria). The block-method in four repetitions and the harvesting plot area of 10 m2 with the following ways of use by years and undergrowths was used. The object of this study included annually (in 4 variants) and in the alternate years (in 3 variants) hay-grazing- use, grazing-hay- use, hay-grazing-grazing- use or only grazing-use of the particular regrowths in the different years. The harvesting in grazing-usе mode (grazing imitation) was accomplished in height of the grass stand 10-12 cm. The harvesting in hay-making mode was accomplished in flowering phenophase of the grasses. It was established that the studying different ways оf harvesting given comparatively high dry matter yields. The following indicators were estimated: 1. Dry mass (DM) yield (in t/ha)- it was established by drying constant weight at 105 Celsius degree in muffle-oven of 0.5 kg green mass samples, taken immediately after cutting each trial plot and repetition; 2. Chemical composition of the absolutely dry matter included crude protein and crude fiber contents of the basic botanica