关键词: 水淹, 羊草草地, 地上生物量

Abstract: Based on the division of landscape functional areas in the Xianlin University Town in Nanjing City, a one-year monitoring of wetland water quality in each landscape functional area of the town was made to reveal the seasonal patterns of the water quality, and fuzzy comprehensive evaluation method was used to evaluate the wetland water quality of the landscape functional areas. The relationships between wetland water quality and human impact degree in each landscape functional area were also analyzed. The wetland water quality in the town had an obvious seasonal fluctuation, being below Ⅲ degree in spring and summer and above Ⅲ degree in autumn and winter. Among the pollution factors, total phosphorus had the highest load, with an average concentration of 0.11 mg·L^-1. The wetland water quality had obvious spatial variability, with the best in College Landscape Area, followed by in Agricultural Landscape Area, Leisure Landscape Area, and Commercial Landscape Area, and was significantly negatively correlated with human impact degree (R²=0.938).

Key words: Flooding, Leymus chinensis grassland, Aboveground biomass