Evaluation of yield and nutrition performence of four Bromus inermis germplasms in alpine region

Four Bromus inermis germplasms were compared in agronomic characters, grass yield, seed yield and nutrients at dry farming in the western town of Haibei of QinghaiTibet Plateau. The results of this study showed they could over winter safely in this region, and performed strong capacity of drought, coldresistance.Grass yield, hay yield and seed production of B.inermis cv. Gannongda were the highest among four materials with 30 136.11, 14 833.61 and 2 116.20 kgha-1. The difference between this material and the other three materials was significantly (P0.05), which indicates B.inermis cv. Gannongda is a forage cultivar with high yield and good quality.