Продуктивност на сортове пасищен райграс (Lolium perenne L.) при планински условия.

In the period 2020-2022, in the experimental field of RIMSA – Troyan, a comparative test of perennial ryegrass (Lolium perenne L.) varieties was conducted in the direction of forage productivity. According to the results, the genotypic factor, respectively the choice of variety, has a significant impact on the productivity of independent cultivation of pasture ryegrass in the mountainous conditions of Northern Bulgaria. The highest dry matter yield, on average for the period, was registered for Nui (1161 kg/da) and Tetramis (1146 kg/da). Maximum height and lowest phenotypic variability by year were formed by the cultivars Tetramis (69.28 cm) and Nui (67.93 cm). The Bulgarian cultivarsultivar, such as the diploid standard c Harmoniya and the tetraploid Tetramis and Tetrani had equal productivity for a medium-long period of use. The grass stands of the Nira and Bokser cultivars were proven to have a lower yield of fresh and dry matter compared to the standard (Harmoniya). [ABSTRACT FROM AUTHOR]