1. Grass species ratio: According to specific needs, it may be necessary to use a variety of grass species for mixed sowing. Grass species are common grasses (such as tall fescue, elymus dahuricus, mussels, etc.). ) and gramineous plants (such as cryptogramineous grass, alfalfa, etc. ). The proportion of different grass species can be determined by expert advice or local experiments.
2. Grass seed density: The density of grass seeds is also a key consideration factor, which is usually determined according to the soil type, rainfall and vegetation coverage target of highway slopes. Shallow soil may need higher grass seed density to improve seed germination rate, and deep soil can appropriately reduce grass seed density.
3. Combination of grass seeds and seeding AIDS: In order to increase the adhesion and germination rate of grass seeds, a certain proportion of seeding AIDS, such as fine soil, fertilizer or straw, are usually added as needed.
In short, the specific scale requirements should be investigated and tested according to the local topography and soil characteristics, and different situations will have different requirements in practical application. It is suggested that professional ecological engineering planning and consultation should be carried out to ensure the vegetation restoration effect and sustainability of highway slopes.