Abstract: Studies on the suspending particular matters of shrimp culture in five enclosure ecosystems show that the concentration of total suspending particular matter varied from²0.83 to 172.50mg·L^-1,with an average of 72.26±39.87mg·L^-1, among which, the organic particular matter accounted for 62%, while the inorganic particular matter was 38%. In the organic particular matter, both particular detritus and bacteria accounted for 98%, while plankton was 2% (Phytoplankton biomass was 4.50 times higher than that of zooplankton). There existed a significant correlation between the concentration of total particular matter and water transparency depth.

Key words: Shrimp culture, Enclosure ecosystem, Suspending particular matters