Abstract:

The technology of slope protection by cast-in-situ grids with vegetation is a new ecological slope protection method. In order to research the adaptability and effect of this method in side slope protection, we took Yanqing test area as an example to investigate the growth of vegetation and the physical and chemical properties of soil in the cast-in-situ grids. Results showed that 4 years after the grids construction, the survival rate of Caryopteris clandonensis reached 94.3%. The newborn branch and foliage flourished with the average biomass of each branch reaching 29.3g, the average height 33.07cm and the average coverage 533cm². Compared with blank plot, the organic matter, total N, available P, and available K of the soil in the grids increased 28.11 g/kg, 0.72g/kg, 11.25mg/kg, 33.74mg/kg, respectively, while pH decreased by 0.71. Moreover, this technology is time-saving and cost-saving with a post-maintenance time of 1-2 years. The research demonstrates that cast-in-situ grids has good performance in soil conservation and vegetation restoration, and is convenient to be applied in slope protection.

Key words: ecological slope protection, cast-in-situ grid, ecological benefit