In this study， a pot experiment with four addition ratios （0%， 20%， 40%， and 60%） of Corncob Fungus Chaff （CFC） was carried out to investigate their effects on seed germination， growth characteristics， photosynthetic traits， and saline-alkali soil properties of Elymus Nutans， and to identify the optimal addition ratio. The results showed that the addition of CFC significantly affected the growth of E. Nutans and soil properties （P<0.05）： the 40% addition ratio yielded the optimal effects， with its germination rate， germination potential， plant height， leaf area， dry matter accumulation， and photosynthetic efficiency being significantly superior to those of the other treatments； the 20% addition ratio significantly enhanced the net photosynthetic rate and stomatal conductance of E.nutans； the 60% addition ratio reduced soil pH， salinity， and bulk density by 4.71%， 30.00%， and 54.81% compared with the control， respectively， while increasing soil water content and porosity by 31.79% and 26.07%， respectively. Correlation analysis indicated that soil pH and salinity were significantly positively correlated with seed germination rate， and soil water content and porosity were significantly positively correlated with dry matter accumulation. In summary， the 40% CFC addition ratio is most suitable for the germination and seedling growth of E.nutans， and can effectively improve the physical properties of saline-alkali soil.

Corncob fungus chaff  /  Elymus nutans  /  Germination characteristics  /  Vegetative character  /  Soil properties