Mutant chlamydomonas reinhardtii, compound algae species and soil conditioner and application of mutant chlamydomonas reinhardtii

The invention belongs to the technical field of remediation of soil polluted by heavy metal cadmium, particularly discloses mutant chlamydomonas reinhardtii, and further discloses a composite algae species or a composite algae species soil conditioner prepared from the composite algae species. The invention further discloses a preparation method of the composite algae or the composite algae soil conditioner prepared from the composite algae and application of the composite algae in remediation of soil polluted by heavy metal cadmium. According to the method, the obtained cadmium-tolerant mutant algal strain is subjected to enlarged culture for the first time and is mixed with chlorella, the compound algal soil conditioner is prepared by using a cell concentration technology, and the compound algal soil conditioner is applied to a cadmium-polluted rice field for in-situ treatment, so that the yield of the cadmium-polluted rice field is increased. Compared with other methods such as phytoremediation, electroche