Abstract: Zooplankton samples were collected in August and October of 2013, and January and April of 2014 in the Jinshahe Reservoir. A total of 95 zooplankton species were recorded, consisting of 45 protozoan, 40 rotifers, 7 Cladocera, and 3 Copepoda. The density of zooplankton varied between 4939.9 and 27238.1 ind·L^-1 and the biomass of zooplankton ranged from 0.56 to 1.49 mg·L^-1. Zooplankton in the Jinshahe Reservoir was dominated by protozoan and rotifer. Correlations between the dominant species of zooplankton and environmental factors which were screened by Pearson analysis were calculated using redundancy analysis, and the results suggested that the community structure of zooplankton could be significantly influenced by PO₄^3--P and COD among the selected environmental factors. The species diversity index was higher in summer and autumn than in spring and winter, but evenness index showed uniform distribution of zooplankton among the four seasons.

Key words: Chrysanthemum morifolium Ramat, crop rotation, continuous cropping obstacle, soil microbial biomass carbon and nitrogen, the amount of microorganisms.