Method for improving cadmium-contaminated soil remediation capacity by hybrid pennisetum alopecuroides
A technology for hybridizing Pennisetum and cadmium-contaminated soil, applied in the field of soil remediation, can solve problems such as changing the soil environment, and achieve the effects of large biomass, strong cadmium enrichment ability, and large remediation potential
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[0027] Example 1
[0028] 1. On March 15, 2019, the "Ningza No. 4" Pennisetum seedlings with 4 true leaves were transplanted into cadmium-contaminated soil with a cadmium concentration of 700-750 mg / kg.
[0029] 2. After the hybrid Pennisetum seedlings grow stably, spray a humic acid aqueous solution with a concentration of 2000 mg / L on the leaves. Spray once a week at 7:30.
[0030] 3. Mow the hybrid Pennisetum when the plant height reaches 1.2m, and apply urea to the Hybrid Pennisetum after cutting, and the addition amount is 900kg·hm -2 .
[0031] 4. Repeat the operations of steps 2 and 3 after the hybrid Pennisetum has grown four true leaves, until the restoration of the cadmium-contaminated soil is completed.
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[0032] Example 2
[0033] 1. On March 15, 2019, the "Ningza No. 4" Pennisetum seedlings with 3 true leaves were transplanted into cadmium-contaminated soil with a cadmium concentration of 300-400 mg / kg.
[0034] 2. After the hybrid Pennisetum seedlings grow stably, spray a humic acid aqueous solution with a concentration of 1000 mg / L on the leaves. Spray once a week at 5:30.
[0035] 3. Mow the hybrid Pennisetum when the plant height reaches 1.2m, and apply urea to the Hybrid Pennisetum after cutting, and the addition amount is 750kg·hm -2 .
[0036] 4. Repeat the operations of steps 2 and 3 after the hybrid Pennisetum has grown 3 true leaves, until the restoration of the cadmium-contaminated soil is completed.
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