A method for ecological restoration of heavy metal polluted soil
A technology for polluted soil and ecological restoration, applied in the field of soil restoration, can solve the problems of small biomass, slow growth of hyperaccumulators, poor tolerance, etc., to achieve outstanding stress resistance, rich genetic diversity, and wide adaptability. Effect
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Embodiment 1
[0025] A pot experiment using artificial chelating agent combined with bamboo willow to remediate heavy metal Pb polluted soil. Put the unpolluted natural air-dried test soil into the test pot at 4kg / pot. Add quantitative N, P, and K fertilizers (the amounts of urea, potassium dihydrogen phosphate, and potassium sulfate are respectively 400, 200, and 300 mg / kg soil) and 50 mg / kg soil EDTA in each pot of soil, and add Pb0 mg respectively / kg soil, 250mg / kg soil, 500mg / kg soil, 750mg / kg soil, 1000mg / kg soil were fully mixed with soil samples to form heavy metal contaminated soil. Deionized water was added to each treatment up to 70% of field capacity. After balancing for 10 days, transplant two bamboo willow seedlings of the same size and height of 1.5-1.8m in each pot. All treatments were repeated 3 times. The results showed that bamboo willow can absorb heavy metal ions Pb while growing. The formula for the absorption rate of bamboo willow to heavy metals: Y=concentration ...
Embodiment 2
[0029] A pot experiment of using artificial chelating agent combined with bamboo willow to remediate heavy metal Cu polluted soil. Put the unpolluted natural air-dried test soil into the test pot at 4kg / pot. Add quantitative N, P, and K fertilizers (400, 200, and 300 mg / kg of urea, potassium dihydrogen phosphate, and potassium sulfate respectively) and Cu500 mg / kg of soil to each pot of soil and mix thoroughly to form heavy metal-contaminated soil . EDTA was not added to the control group, and 350 mg / kg of EDTA was added to each pot of soil in the treatment group. Add deionized water to each pot of soil to reach 70% of the field water capacity. After balancing for 10 days, transplant two bamboo willow seedlings of the same size and height of 1.5-1.8m in each pot. All treatments were repeated 3 times. The soil was tested after bamboo willow cultured for 45 days. The results showed that the Cu content in the aboveground part of the bamboo willow in the control group and the...
Embodiment 3
[0031]A pot experiment of using plant growth regulator, artificial chelating agent and bamboo willow to remediate heavy metal Pb polluted soil. Put the unpolluted natural air-dried test soil into the test pot at 4kg / pot. Add quantitative N, P, and K fertilizers (the amounts of urea, potassium dihydrogen phosphate, and potassium sulfate are 400, 200, and 300 mg / kg soil) and Pb600 mg / kg to fully mix with soil samples to form heavy metals in each pot of soil. pollute the soil. Add EDTA20mg / kg soil to each pot, and add deionized water to 70% of the field water capacity. After balancing for 10 days, two bamboo willow seedlings with a height of 1.5-1.8 m without soaking roots were transplanted in each pot in the control group, and bamboo willow seedlings with a height of 1.5-1.8 m in height soaked with 50 mg / L NAA for 48 hours were transplanted in each pot of the treatment group. Two seedlings. All treatments were repeated 3 times. The soil was tested after bamboo willow culture...
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