Abstract:

The authors took representive slope restoration plant-bluegrass as experiment material, chose cement, water retaining agent, fertilizer and humus as plant media. Designing pot experiment by orthogonal test L9（34）to research the influence on growth status of bluegrass in nine different formulas mixed by fore medias, then measured and analyzed the physical and chemical properties of different substrate formulation，the buds rate，survival rate and plant height on fifty day of bluegrass. The results shows that the influence of different substrate formulation on growth status of bluegrass is different. By range analysis, the results are showed as follows: the order of four factors which affect the buds rate of plants is water retaining agent > humus> cement> fertilizer;the order affecting the survival rate of plants is water retaining agent > cement> fertilizer> humus; the order affecting the plant height on fifty day is water retaining agent > fertilizer> humus> cement. In the end, the optimum combination is treatment-9 consisting of 15.0% cement, 1.0% water retaining agent, 6.0% fertilizer and 6.0% humus which can raise both buds rate and survival rate significantly and promote the growth of bluegrass. Then, treatment-5 consisting of 10.0% cement, 0.5% water retaining agent, 9.0% fertilizer and 6.0% humus ensures higher survival rate and plant height on fifty day.