The problem of expanding the species range of fodder crops to provide the livestock industry of the West Siberian region with complete fodder is very relevant. The article presents the results of a long-term scientific experiment on the study of the biological characteristics, yield stability, and ecological plasticity of 11 species of rare fodder plants introduced from the wild flora. The research was conducted in the southern forest-steppe of the Omsk Region at the experimental field of the Omsk State Agrarian University named after P.A. Stolypin. It has been established that these crops have a whole range of economically useful characteristics and they can be used to expand the range of cultivated forage crops in Western Siberia. They are winter-hardy and many of them have good environmental adaptability, stability, high yields of green mass and seeds, nutritional value, a long period of two-crop economic use, and suitability for creating various green and raw material pipelines. In the conditions of the region, high plasticity (IEP = 1.14-1.68) and the ability to form high yields are distinguished by pierced-leaved silphium perfoliatum, sida hermaphrodita, rumex patientia, symphytum asperum, and polygonum divaricatum. These sparsely distributed forage crops averaged over the years of research on the collection of absolutely dry matter (8.2-12.1 t/ha), feed units - 3.71-6.36 t/ha, exchange energy - 66- 104 GJ/ha significantly exceed corn, especially in terms of crude protein harvest (1.56-2.78 t/ha), by 1.8-3.2 times. All perennial species have a high concentration of metabolic energy and the content of digestible protein in one feed unit is 177-360 g, which exceeds the zootechnical norm of 100-110 g/ feed. Stable and highest seed yields (389-1245 kg /ha) in the conditions of the West Siberian region are formed by silphium perfoliatum, polygonum divaricatum, rumex patientia and isatis tinctoria, with IEP = 1.15-3.68.
parsely distributed forage crops, yield, green mass, dry matter, feed units, protein, ecological plasticity, seeds
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