Method for decreasing soil heavy metal cadmium polluting water spinach

The invention discloses a method for reducing the heavy metal cadmium pollution in soil to water spinach, the method is to plant water spinach in Cd polluted soil, and reap the water spinach in collection period, and select water spinach varieties with low accumulated Cd content by analyzing the content of Cd in stems and leaves of the water spinach, and then varieties of water spinach with low accumulated Cd content are planted in soil. The treatment of the prior water spinach Cd pollution mainly adopts the method of phytoremediation, the method needs a rather long period with high cost, and is difficult for large scale application. The invention provides the novel water spinach Cd pollution treatment method which can directly, rapidly and effectively solve the soil Cd pollution problem in the farmland of China, so the invention has strong pertinence, simple operation, low cost and safety, and is suitable for wide application.