Abstract:

The study aims to understand the composition and the variation of composition of herbaceous plants along green space and their correlation with environmental impact factors in Yuncheng City. The interspecific correlation and variation rule of the composition of herbaceous plants along green space were analyzed on the basis of field investigation, and data of the relationship between plant distribution and environmental characteristics were studied by canonical correspondence analysis. The results showed that 22 herbaceous plants were found, belonging to 12 families and 19 genera. Almost all species pairs had a certain degree of correlation. Liliaceae was the dominant family, and Iris and Hemerocallis were the dominant genus. Hemerocallis fulva and Iris tectorum, etc. were the dominant species, especially Iris tectorum had the highest important value. The number of herbaceous plant species showed a para-curve distribution mode of “low-high-low” with the increase of green space, and was the highest at green space of 16.40 hm². The area and landscape type of sample plots had great influence on the distribution of Phragmites communis and Dahlia pinnata. The sample area should be set at least 20 hm². At last, it was found that among the four environmental characteristics, the surrounding environment and the landscape type were strongly correlated with the distribution of herbaceous plants.

Key words: Yuncheng City, Herbaceous Plants, Green Space, Environmental Characteristics, Correlation Analysis