Awnless brome varieties fodder productivity and nutritional value in the Krasnoyarsk region

The purpose of the study is to evaluate the fodder productivity and nutritional value of awnless brome varieties. Objectives: to evaluate fodder productivity in terms of green mass yield, dry matter collection, protein and energy productivity; to study the nutritional value of varieties in terms of the content of crude protein, digestible protein, fiber and metabolic energy; to determine the ecological plasticity and stability of awnless brome varieties. The study was carried out in the forest-steppe zone of the Krasnoyarsk Region, at the Uyarsk GSU, a qualitative analysis was carried out in the zonal Krasnoyarsk Chemical-Technological Laboratory in 2019-2021. In 2018, the laying of experiments was carried out, in 2019-2021 surveys and observations were conducted. Sowing method - ordinary, uncovered, fourfold repetition, predecessor - fallow. The objects of study are varieties of awnless brome: Langepas (standard), Aiystal, Gvardeets and Rassvet. Productivity was assessed by the collection of dry matter, digestible and crude protein, energy productivity, for this, the yield of green mass in the heading phase was taken into account, the content of dry matter, protein and fiber in dry matter was determined, then, by calculation, the collection of dry matter, protein and energy productivity were found. The best in terms of fodder productivity was the brome variety Aiystal, the green mass yield of which was 18.79 t/ha; collection of dry matter - 3.91; collection of crude and digestible protein - 0.83 and 0.56 t/ha, respectively; energy productivity - 33.35 GJ/ha. The nutritional value of the awnless brome depended to a greater extent on the year. All studied varieties provided high nutritional value of dry matter. Aiystal showed itself as the most flexible and stable variety in terms of yield. In terms of protein collection, the varieties Gvardeets, Rassvet and Langepas became the most plastic. Stable collection of protein was provided by varieties Gvardeets and Rassvet. In terms of protein content, Langepas and Rassvet proved to be the most plastic varieties, the Rassvet variety was the most stable. In terms of fiber content, the most plastic and stable varieties are Langepas and Aiystal.