关键词: 田间药效, 田间药效

Abstract:

To purify water, and improve the environment of growth and reproduction of ground fish, in this experiment, we used a new culture model named partitioned pond, meanwhile we did a comparative study about plankton between partitioned pond and ordinary pond. The results showed that: to zooplankton, in terms of the type, zooplanktons in the 1st and 2nd pond had 42 species, four phyla; zooplankton in the 3rd and 4th had 43 species, four phyla. There were no significant differences among four ponds, the number of species of protozoa and rotifers were the majority, followed by cladocera, copepods was the least; As for density and biomass, there was a significant difference among four ponds, in which the 2nd pond (traditional ponds) had the largest number and biomass of zooplankton, zooplankton abundance and biomass were the smallest in the 3rd pond (zoning pond). To Phytoplankton, in terms of the number of species, four ponds had no significant difference. The phytoplankton identified from the pond belonged to 43 species, 7 phyla. The sequence of all species were Chlorophyta>Bacillariophyta>Cyanophyta>Other. In which, the proportion of Xanthophyta, hidden algal door, Pyrrophyta and Euglenophyta were all 2.0%; in terms of its density and biomass of four ponds, there existed significant differences, within different sampling dates, abundance and biomass of phytoplankton in the 2nd pond were the largest, the 3rd pond was the lowest. The results showed that: the plankton biomass in partitioned pond was significantly less than traditional pond, it was suitable for fish farming who preference for lean water quality.