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Method for repairing lead polluted soil by using EDTA and brassinolide co-induced rye grass

A technology of lead-contaminated soil and brassinolide, applied in the restoration of polluted soil and other directions, can solve the problems of yellowing growth rate of leaves, low biomass, dwarf plants, etc., and achieves alleviation of toxicity, high restoration efficiency, and restoration short cycle effect

Inactive Publication Date: 2016-12-21
CHANGZHOU UNIV
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Problems solved by technology

[0009] The invention provides a method for phytoremediation of ryegrass induced by EDTA and brassinolide in lead-contaminated soils in mining areas, which solves the problems of short plant growth and biological damage caused by the inhibition of ryegrass growth by soils with high lead content represented by lead mining areas. Low yield, yellowing leaves and slow growth rate

Method used

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  • Method for repairing lead polluted soil by using EDTA and brassinolide co-induced rye grass
  • Method for repairing lead polluted soil by using EDTA and brassinolide co-induced rye grass
  • Method for repairing lead polluted soil by using EDTA and brassinolide co-induced rye grass

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Experimental program
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Effect test

Embodiment 1

[0027] 1 test plant

[0028] Use perennial ryegrass.

[0029] 2 test soil

[0030] The soil for testing comes from vegetable fields around Changzhou Science and Education City. Its basic physical and chemical properties (background value) are: pH value is 7.2, organic matter content is 7.48g / kg, available nitrogen, available phosphorus, available potassium and soil total Pb content are respectively: 35.54, 24.77, 121.42 and 30.62 mg / kg.

[0031] 3 pot experiments

[0032] heavy metal Pb to analyze pure Pb(NO 3 ) 2 The solution was sprayed on the soil, fully mixed by a mixer, and equilibrated for 6 months to simulate the Pb-contaminated soil in the mining area (Pb content is 500mg / kg), and the original clean soil was used as a control. Each plastic pot 25cm (diameter) × 17cm (height) is filled with 2.5kg of soil. Seeds were sterilized with 4% NaClO for 30 minutes, and cleaned with deionized water before sowing, 250 seeds per pot (to ensure more than 150 plants per pot aft...

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Abstract

The invention belongs to the field of soil heavy metal repairing, and discloses a method for repairing lead polluted soil by using EDTA and brassinolide co-induced rye grass. The method is characterized in that perennial rye grass is planted in lead polluted soil, EDTA is regularly applied to the soil, a nutrient solution of plant growth regulation brassinolide is regularly spray on leaves, and the overground part of the rye grass is cut after the growth period ends; and multi-cycle cultivation plantation is carried out according to practical soil condition needs by using the multi-time cutting characteristic of the perennial rye grass in order to repair the heavy metal lead polluted soil. The method promotes growth of the rye grass, solves the problems of plant biomass reduction and fine leaves caused by inhibition of the growth of rye grass by waste mining area lead polluted soil, and has the advantages of high absorption efficiency, high enrichment degree and substantial repairing effect.

Description

technical field [0001] The invention belongs to the field of soil heavy metal restoration, and in particular relates to a method for jointly inducing ryegrass to restore lead-contaminated soil by using a chelating agent and a plant growth regulator. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, among the 1,672 soil points in the 70 mining areas investigated, 33.4% of them exceeded the standard, and the main pollutants were cadmium and lead. , arsenic and polycyclic aromatic hydrocarbons; cadmium, arsenic, lead and other pollution in the surrounding soil of non-ferrous metal mining areas are relatively serious; among the 775 soil points in the 81 industrial wastelands investigated, 34.9% of the points exceed the standard, and the main pollutant is zinc , mercury, lead, arsenic and polycyclic aromatic hydrocarbons, mainly involving chemi...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/00B09C1/08B09C1/105B09C2101/00
Inventor 潘新星王明新葛跃刘建国
Owner CHANGZHOU UNIV
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