Analysis of species composition and diversity of native landscape cover plants in Changchun

Abundant native landscape cover plants exist in the green spaces of Changchun. To study the species composition and diversity of native landscape cover plants in Changchun, the species, crown density, height, density, and coverage were investigated using 595 samples, and the soil physical and chemical properties of typical samples were determined. The results showed that 95 species belonged to 40 families and 83 genera. The importance of Liliaceae was 31.93%, which was dominant among all families, followed by Cmpositae, Violaceae, and Gramineae. The diversities of native landscape cover plants among different type green spaces and communities changed obviously, and the park green spaces and coniferous and broad-leaved trees mixed communities had the highest diversity index, whereas the road green spaces and coniferous mixed communities had the highest evenness index. RDA results showed that there was a positive correlation in the Margalef index, Shannon-wiener index, and Simpson index between the soil total nitrogen and organic carbon (P < 0.05) and a native correlation between crown density and pH values. The results are expected to provide a certain reference value for the selection and application of landscape cover plants in northeast China.