PERSISTENCY OF ARTIFICIAL SWARDS WITH PARTICIPATION OF RED FESCUE LOCATED ON THE SLOPES OF THE CENTRAL BALKAN MOUNTAINS IV. STATE OF MIXED SWARDS OF RED FESCUE AND KENTUCKYBLUEGRASS

摘要

State of mixed swards of red fescue and Kentucky bluegrass located on the slopes of the mountain was studied for a 13-year period (1994- 2006). At a low degree of soil gleying, upper slope part, the average yield was highest, 816 kg/da, at easterly exposure. The yield was lowest, 479 kg/da, at westerly exposure. At a high degree of soil gleying, lower slope part, the highest average yield of 692 kg/da was obtained at northeasterly exposure. The lowest average yield of 476 kg/da was obtained at easterly exposure. The swards had high sustainability of development, the presence of the sown species in the total forage mass in the different variants being up to 98%(westerly exposure. greatly eroded soils.year 1997) The participation of the sown species according to years and location was variable. It was greater at the higher levels of soil gleying, as compared to that at the lower ones.