Устойчивост и продуктивност на сортове Festulolium в агроекологичните условия на Сърбия.

Festulolium are hybrids obtained by inter crossing of species from the genera Festuca and Lolium. Initially, idea was to combine Festuca tolerance to abiotic stresses and edaphic and climatic adaptability with Lolium high yield, digestibility and compatibility with intensive grasslands management. All Festulolium cultivars of the predominant contribution of Lolium genome (Lolioid type) are productive, with high quality and digestible forage, but their areal of cropping is limited according to Lolium drought susceptibility. Persistency and productivity of 15 different Lolioid Festulolium cultivars and 6 standard Festuca and Lolium species cultivars were investigated in a moderate continental climate in Kruševac, Serbia. Plots in the trial (7,5m2 ) were completely randomized, each in 3 replications. Summer persistency was analyzed by evaluation of ground cover reduction after summer periods in the second and third years. Concerning hybrid combination, best persistency (38.5% of coverage reduction in the third year) was determined for hybrid between Lolium multiflorum x Festuca arundinacea var. glaucescens even though there was only one cultivar of this type. The majority of cultivars were Lolium multiflorum x Festuca pratensis hybrids (8) and they showed residual coverage between 30 and 52%. At the end of the third year of the study, the highest dry matter yield was determined for hybrids Lolium multiflorum x Festuca gigantea and Lolium multiflorum x Festuca pratensis type. The general conclusion is that most cultivars suffered from severe stand density reduction after the first year of cutting and therefore had a lower dry matter yield compared to Festuca control cultivars, but showed significantly better persistency and higher values for dry matter yield in comparison with Lolium cultivars. [ABSTRACT FROM AUTHOR]