Preliminary Study on the Inhibitory Effect and Mechanism of Eichhornia crassipes on Co-Cultured Raphidiopsis raciborskii

Raphidiopsis raciborskii, which harms water supply and ecological security, may expand its range with climate warming. To explore the management method of R. raciborskii blooms, co-culture system Eichhornia crassipes was established to study inhibitory effect inhibition mechanism E. on compared shaded culture alone. It found that after co-cultured (fresh weight, 5.10 ± 0.60 g·L−1) for seven days under initial high nutrient concentration, algal cell density groups an 1.57 × 108 cells·L−1 109 decreased by 63.19% 14.87%, respectively. Meanwhile, in group significantly lower than control (p < 0.01). The change showed growth inhibited crassipes. In addition, could reduce nitrogen phosphorus content water, but state photosynthesis were not raciborskii. These results suggested has potential blooms. also when co-cultured, there no significant difference between supplemented a certain amount nutrients without additional nutrients. rates over 99% day 4. factors had regulated experiment, other played leading role. words, experimental conditions, competition primary This confirmed allelopathy contribution significance mechanisms be studied future.