Method using Artemisia selengensis to remedy soil mildly and moderately polluted by heavy metal

Abstract

The invention discloses a method using Artemisia selengensis to remedy soil mildly and moderately polluted by heavy metal. The method includes the steps of firstly, selecting Artemisia selengensis variety; secondly, preparing a field, to be more specific, applying thoroughly decomposed organic fertilizer, evenly raking and flatly ploughing soil and the fertilizer, and ridging; thirdly, performingpre-emergence weeding, to be more specific, spraying a pre-emergence herbicide before cuttage, and performing soil spraying processing; fourthly, raising seedlings by cutting, to be more specific, collecting robust Artemisia selengensis branches from the field, cutting off leaves and tender shoots on the middle and lower portion, compacting the soil after the cuttage, and watering to allow the water content of the soil to be saturated; fifthly, performing water management, to be more specific, keeping the field moist due to the fact that Artemisia selengensis is a wetland plant and is intolerant to drought; sixthly, performing field weeding, to be more specific, performing manual weeding to remove cyperaceae and dicotyledonous weeds; seventhly, performing disease and pest control; eighthly, harvesting the overground part of Artemisia selengensis, and removing withered branches and leaves from the field; ninthly, performing harmless treatment on the harvested Artemisia selengensis. Themethod is practicable, simple to operate, low in cost, high in heavy metal removing efficiency and capable of satisfying the remediation and treatment requirements of the soil mildly and moderately polluted by heavy metal in southern China.

Description

technical field [0001] The invention belongs to the technical field of agricultural environment conservation and restoration, and more specifically relates to a method for repairing mildly and moderately heavy metal-polluted soil by using Artemisia perenniali, which is applicable to the restoration of lightly and moderately heavy metal-polluted farmland in southern China, by planting the high-enrichment plant betel Artemisia, absorbing and extracting heavy metals in the soil, reducing the heavy metal content in the soil to the safe production range, is an effective method to reduce heavy metal pollution such as cadmium in the soil with low cost, environmental protection, easy operation and management. Background technique [0002] The "National Soil Pollution Survey Bulletin" released in 2014 shows that the overall rate of national soil exceeding the standard is 16.1%, of which the proportions of slightly, lightly and moderately polluted sites are 11.2%, 2.3% and 1.5%, respec...

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Problems solved by technology

These methods have the advantages of low cost, no damage to soil physical and chemical properties, and no secondary pollution in remediating soil lead and chromium pollution, but they are not suitable for remediation of cadmium-contaminated soil in southern paddy fields

Huang Daoyou et al. mentioned in "A Method for Planting Ramie on Moderately Heavy Metal Polluted Soil" [CN201210475303.X] that the agricultural safety and high-efficiency utilization of moderately heavy metal-polluted soil can be achieved by planting ramie, but ramie is not resistant to flooding. Poor growth in paddy fields with water supersaturated soil

[Journal of Environmental Science, 32 (6) 1473-1480] studied the stress response and remediation potential of Artemisia pernicifolia to cadmium in soil through pot experiments, but did not carry out field experiments. The repair effect is unknown

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