Influence of row spaces and planting years on yield of fresh grass and seeds of Elymus sibiricus

In this study, influence of five row spaces (30, 45, 60, 75 and 90 cm) and 2―5 cultural years on the characteristics of shoots, inflorescences, seed yield and grass yield of Elymus sibiricus were measured and analyzed by using a randomized block design. The results showed that row space, cultural year and their interaction all affected height and density of shoots, proportion of fertile tillers, spikelets/fertile tillers, florets/fertile tillers, potential seed yield, presentation seed yield and harvested seed yield significantly. The affected order from big to small was row spaceinteractioncultural year. The row space of 30-45 cm was beneficial to fresh grass production, while the row space of 60 cm appropriated seed production. In the third year, the fresh grass yield was the highest with the values of 19 225.6 kgha-1 (30 cm) and 16 733.4 kgha-1 (45 cm) respectively. Yet seed yield was the highest in the row space of 60 cm with the value of 1 620.67 kgha-1. Therefore, forage production should be planted with the row space of 30-45 cm and seed production should be planted with the row space of 60 cm.