50 results about "Galinsoga parviflora" patented technology

The invention discloses a remediation method for heavy metal cadmium pollution of orchard soil based on galinsoga parviflora. The remediation method comprises the following steps: preparing galinsoga parviflora seedlings in a direct transplanting mode or a direct seeding mode; watering to guarantee the water-holding capacity of soil in a field and performing daily management on the galinsoga parviflora; performing harvesting treatment, i.e., harvesting the aboveground part of the galinsoga parviflora. The galinsoga parviflora has resistance and hyperaccumulation feature to cadmium heavy metal, the seedlings absorb and accumulate the cadmium heavy metal in the contaminated soil of the orchard, and the cadmium is transferred to the aboveground part to reduce the cadmium content in the orchard soil, so that the purpose of reducing the cadmium content in the contaminated soil of the orchard is achieved. In addition, the galinsoga parviflora has strong reproductive capacity, grows quickly and is shade-tolerant, the base part has strong branching capacity and can sprout after being harvested; the galinsoga parviflora can be planted almost all the year round in southern China and can grow in extremely barren land, the cost is low, the operability is high, and a new plant genetic resource is developed for phytoremediation of the heavy metal cadmium contaminated orchard soil.

The invention discloses a method for improving the cadmium-contaminated soil restoring ability of galinsoga parviflora by the aid of hyperaccumulation plants, and belongs to the field of restoration for environments contaminated by heavy metal. The method includes directly applying dried stalks of cut red-fruit youngia japonica into orchard soil in autumn, directly transplanting galinsoga parviflora seedlings or directly broadcasting seeds to prepare galinsoga parviflora seedlings; watering field soil to guarantee the water retention capacity of 80%, and performing daily management on the galinsoga parviflora; harvesting above-ground portions of the galinsoga parviflora after 50 days. Each directly transplanted galinsoga parviflora seedling has two pairs of spread true leaves. The dried stalks of the red-fruit youngia japonica is applied to the soil, so that the cadmium extraction quantity of the unit area of the galinsoga parviflora can be effectively increased by 13.8% by the aid of the method as compared with a non-application (contrast) method. The method has the advantages of low cost, high operability, environmental friendliness and capability of effectively restoring the soil contaminated by cadmium which is heavy metal.