Abstract: By using life table analysis technology, the survival and reproduction of Daphnia magna fed with Cyclotella meneghinana, Microcystis aerugionosa 905, M. aerugionosa 469, and Scenedesmus obliquus were observed in laboratory under constant temperature condition (25 ℃), aimed to investigate the effects of different algae on the life history of D. magna. Among the test algae, C. meneghinana and M. aerugionosa 469 improved the growth of D. magna, S. obliquus had the similar effect as C. meneghinana and M. aerugionosa 469, while M. aeruginosa 905 gave negative impact on the growth and survival of D. magna. The net reproductive rate (R0), generation time (T), intrinsic rate of increase (rm), and survival rate of D. magna were 4435, 1186, 032, and 5% when fed with C. meneghinana, 4820, 1425, 027, and 30% when fed with M. aerugionosa 469, 810, 1247, 017, and 15% when fed with S. obliquus, and 0, 0, 0, 0 when fed with M. aerugionosa 905.

Key words: Winter wheat, Osmotic stress, Chlorophyll fluorescence kinetics