Method for remediation of phosphorus-contaminated soil

Abstract

The invention relates to a bioremediation method for phosphorus contamination, in particular to a method for remediation of phosphorus-contaminated soil, which comprises the following steps of: growing polygonum hydropiper in the phosphorus-contaminated soil; directly transplanting the polygonum hydropiper or directly sowing seeds of the polygonum hydropiper for growth; and regularly harvesting the overground part of the planted polygonum hydropiper. By utilizing the phosphorus enriching characteristic of the polygonum hydropiper, the polygonum hydropiper is grown in the soil, absorbs the phosphorus accumulated in the soil, and transfers most of phosphorus to the overground part so as to fulfill the aim of remediation of the phosphorus-contaminated soil. The polygonum hydropiper has vigorous vitality, is easy to survive, and does not need special management in the growing process, so the cost is low, and the operability is high. Meanwhile, the polygonum hydropiper has traditional Chinese medicinal effect of treating acute filthy disease stomachache, vomiting and diarrhea and spasm of calf, diarrhea, dysentery, rheumatism, dermatophytosis, carbuncle, mange, traumatic injury and the like, so the resource can be fully and reasonably utilized and is multipurpose.

Description

technical field [0001] The invention relates to a bioremediation method for phosphorus pollution, in particular to a method for remediating phosphorus-contaminated soil. Background technique [0002] Phosphorus is an important nutrient element for plant growth. Insufficient supply of phosphorus often restricts the normal growth of plants in natural ecosystems, because the available phosphorus in the soil is mainly in the form of phosphate, and the phosphate is easily combined with metals in the soil. Ions combine to form precipitation, resulting in very little available phosphorus in the soil, which cannot meet the needs of plants, which requires a large amount of phosphorus fertilizer to be invested in the agricultural production process. Because the chemical phosphorus fertilizer applied to the soil is also easily absorbed, fixed and mineralized by the soil, the utilization rate of phosphorus fertilizer is usually only 10%-20%, and the rest is temporarily or long-term reta...

AI Technical Summary

Problems solved by technology

However, this treatment method is not only costly, but also cannot fundamentally solve the problem of phosphorus pollution, which is greatly limited in practical application.