Keywords:  productivity structure, green mass, density of herbage, propagation way, root stems

// Мелиорация. – 2018. – №2(84).– P. 56—60

The article presents 6 years study of productivity structure and productivity of green mass of Silphium perfoliatum L.grown both by seed and by root stem of different density methods. It was found that density of plants affects stem-forming ability. Herbage of a highest plant density has the biggest and the highest leaves of the first mowing. Due to intensively sowing the plants were higher by 3.8 sm. Analysis of date shows that variant of root stem sowing with location scheme of 70 thousand plant units per hectare allows us to obtain productivity by experimental variants of 112.4–112.8 t/ha if hydration is optimal during the year.