Abstract:
Abstracts In this study, vegetation of three slope aspects (semi-shady slope EN 40°, sunny slope WS33°, shady slope WN 29 °) built for five years in hilly area of Northeast Sichuan were used as the research object, and the effects of slope aspects on comprehensive vegetation management of bare slope by slope protection vegetation were studied by measuring community characteristics, landscape quality and soil properties. The results showed that: (1) Slope direction affected the community density, dominant species height and basal coverage of vegetation (
P<0.05), and also affected species density, diversity, richness and evenness (
P<0.05).The community density, base coverage, species diversity and evenness of semi-shady slope were higher than those of sunny slope and shady slope. (2) Slope aspect affected the landscape quality and vegetation appearance (
P<0.05), and the landscape goodness of shady slopes was medium, while that of semi-shady slopes and sunny slopes was poor. (3) Slope aspect affected soil grain size composition, physical properties and chemical properties (
P<0.05). The soil texture of shady slope was higher than semi-shady slope and sunny slope (
P<0.05), and the soil layer thickness of sunny slope was thicker than that of shady slope and semi-shady slope. (4) In the fifth year, the soil properties, species diversity, community height and basal coverage of three slopes were higher than those in the first year (
P<0.05). In conclusion, the slope aspect affected the characteristics of vegetation community, landscape performance and soil properties. As the pioneer vegetation of bare slope management, the introduced turfgrasses completely disappeared in the fifth year, but it still played an important role in local grass species colonization, bare slope vegetation reconstruction, landscape restoration and soil and water conservation.