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Microcystis aeruginosa is the most harmful cyanobacterial blooms of algae, phosphorus is the most important element of the eutrophication of water bodies. In this thesis, laboratory small scale and small-scale simulation device to study the characteristics of different phosphorus content of the water system, the growth process of microcystin, algae proliferation, intracellular phosphorus, the soluble TP, biochemical composition changes, groups variation of characteristics, pH, DO, light intensity and other environmental factors. Different phosphorus concentration on growth of Microcystis aeruginosa in laboratory the small test conditions under a in sufficient nitrogen concentration, phosphorus concentration of 0.2mg / L, the maximum growth rate of algal cells. When phosphorus concentration greater than 0.2mg / L, the phosphorus concentration of the water on the growth of Microcystis much impact. 2, N / P = 16 conditions, the fastest growth rate of Microcystis aeruginosa, the highest cell biomass; nitrogen to phosphorus ratio less than 16 the growth of the state, especially in the nitrogen to phosphorus ratio greater than 16 nutritional status; algal cells carbohydrate content is also affected by the impact of nitrogen to phosphorus ratio, the content of 16:1 gt; 5:1 gt; 1:1 gt; 50:1 gt; 100:1. Small analog device under the conditions of different phosphorus concentration on growth of Microcystis aeruginosa and environmental factors, TP ≤ 0.046mg / L, and algal growth eventually limiting factor in the development of phosphorus limitation, with increasing exogenous phosphorus (TP ≥ 0.41mg / L), the biomass reaches a certain level, the growth of algae into light confinement. While too high phosphorous content (TP ≥ 1.71mg / L) of the input, limiting effect on algal growth; TP = 0.046-0.41mg / L water, the intracellular phosphorus increased beneficial algal growth, Microcystis Growth depends primarily on the intracellular phosphorus; in TP = 0.41mg / L analog device, its growth rate is the optimum concentration of microcystin growth simulation apparatus. 2 Monod equation and Droop equation, phosphate affect Microcystis aeruginosa growth than the growth rate of the maximum μmax equal to 0.42 / d, the half-saturation constant Ks for 0.0156mg / L the the intracellular phosphorus share of Q < / sub> 0.23μg/mg (dw). 3, in the algae cultivation process, the water pH, DO, carbohydrates exhibit diurnal variation; With the growth of the frond, Microcystis biomass increases gradually, and the gradual weakening of the intensity of the light passing through the culture liquid, and with the device water column depth increases, the growth rate of algae and is inversely proportional to the light intensity. With increasing phosphorus concentration Microcystis aeruginosa in a variety of biochemical composition are subject to varying degrees of impact. Chlorophyll changes, an increase of 50-70% (maximum peak comparison); linear regression, TP = 0.41mg / L analog device, carbohydrates and protein synthesis and accumulation of the fastest, and the rate of synthesis of the carbohydrate greater than the speed of protein accumulation; light and the product of biochemical changes in the composition of protein and carbohydrate ratio (P / C) can reflect the state of the growth of algae in the environment of different water bodies. 5 of phosphorus in water content also have a larger impact on the population structure of the cell. In short, the phosphorus is not only the growth stimulation of microcystin and complex relationship with environmental factors, plays a very important role in the growth process of microcystin.
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