Method for repairing contaminated soil by intercropping heavy metal hyperaccumulation herbaceous plants and woody flowers
A technology for polluted soil and heavy metals, applied in the restoration of polluted soil and other directions, can solve the problems of few phytoremediation technologies, the phytoremediation technology is in the research stage, and the plants are long, so as to achieve rapid removal of heavy metal pollution, prevention of soil erosion and natural growth. fast reproduction effect
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Embodiment 1
[0037] This embodiment selects farmland near a certain lead-zinc mining area, and provides a method for intercropping polluted soil with heavy metal hyperaccumulating herbs and woody flowers, including the following steps:
[0038] (1) The single factor index method is used to investigate the soil heavy metal pollution: the heavy metal pollutants in the soil are determined to be lead, cadmium, arsenic, zinc, and copper, and the median and average values of soil pH are greater than 7.5. The test results of heavy metals such as cadmium, arsenic, lead, copper, zinc, etc. are all 1-15 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);
[0039] (2) After the seeds of the Jade lotus tree are raised in the greenhouse seedlings, the Jade lotus seedlings are cut on the polluted soil in September-October, and the area of 2m×2m is used as a planting hole, and one plant of Jade lotus is cut in each planting...
Embodiment 2
[0048] This embodiment selects farmland near a certain lead-zinc mining area, and provides a method for intercropping polluted soil with heavy metal hyperaccumulating herbs and woody flowers, including the following steps:
[0049] (1) The single factor index method is used to investigate the soil heavy metal pollution: the heavy metal pollutants in the soil are determined to be lead, cadmium, arsenic, zinc, and copper, the median and average value of the soil pH value are 5.0, and the cadmium in the polluted soil is 5.0. The detection results of heavy metals such as arsenic, lead, copper, zinc, etc. are all 1-10 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);
[0050] (2) After the seeds of the black locust tree are grown in the greenhouse seedlings, cuttage black locust seedlings in September-October on the polluted soil, and take the area of 2m * 2m as a planting hole, and each planting hole...
Embodiment 3
[0060] This embodiment selects a farmland near a certain copper mining area, and provides a method for intercropping polluted soil with heavy metal super-enriched herbs and woody flowers, including the following steps:
[0061] (1) The single factor index method is used to investigate the soil heavy metal pollution: it is determined that the heavy metal pollutants in the soil are lead, cadmium, arsenic, zinc, and copper, the median and average value of the soil pH value are 8.0, and the cadmium in the polluted soil is 8.0. The test results of heavy metals such as arsenic, lead, copper, zinc, etc. are all 1-5 times higher than the "Soil Environmental Quality Standard Agricultural Land Soil Pollution Risk Control Standard" (GB15618-2018);
[0062] (2) After the seeds of the sausage tree are seeded in the greenhouse, cut the sausage tree seedlings on the polluted soil in September-October, and use the area of 2m × 2m as a planting hole, and cut a sausage tree in each planting ho...
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