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Plant management method for heavy metal contaminated soil

A technology of polluted soil and management methods, applied in the restoration of polluted soil, etc., to achieve the effect of widely popularizing value, increasing stress resistance, and promoting the enrichment of heavy metals

Pending Publication Date: 2022-01-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of single factor management at present, the present invention aims at the problem of remediation of heavy metal pollution in soil, and provides a plant management method for heavy metal polluted soil

Method used

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  • Plant management method for heavy metal contaminated soil
  • Plant management method for heavy metal contaminated soil
  • Plant management method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The joint strengthening management method of brassinolide, moisture and urea in this embodiment is as follows:

[0033] 1. Crush the soil polluted by heavy metal cadmium (9.62 mg / kg) and pass it through a 2 mm sieve;

[0034] 2. Apply 0.3 g / kg of urea to the soil and mix well, add 1 kg of mixed soil to each pot;

[0035] 3. Add water to the soil to ensure that the moisture content is about 50% ± 5, and use a moisture sensor to measure the moisture content;

[0036] 4. Cutting willow cuttings and sowing vetiver seeds in soil with moisture content (50%±5), 1 willow per pot and 0.1 g of vetiver per pot;

[0037] 5. After planting willow and vetiver for 15 days, spray 24-epibrassinolide with a concentration of 2000 times once a week (just distribute the water drops on the leaves evenly, and spray every week for 4 months), Harvest after 4 months and measure the concentration of heavy metal cadmium.

[0038] The schematic diagrams of the concentration of cadmium in willow ...

Embodiment 2

[0040] Embodiment 2 The joint strengthening management method of brassinolide, moisture and urea in this embodiment is as follows:

[0041] 1. The soil polluted by heavy metal arsenic (95.56 mg / kg) was crushed and passed through a 2 mm sieve;

[0042] 2. Apply 0.35 g / kg of urea to the soil and mix well, add 1 kg of mixed soil to each pot;

[0043] 3. Add water to the soil to ensure that the moisture content is about 60%±5, and use a moisture sensor to measure the moisture content;

[0044] 4. Cutting willow cuttings and sowing vetiver seeds in soil with a certain moisture content (60%±5), 1 willow per pot and 0.1 g of vetiver per pot.

[0045]5. After 15 days of planting willow and vetiver, spray 24-epibrassinolide with a concentration of 2500 times once a week (just distribute the water droplets on the leaves) once a week, harvest and measure heavy metal arsenic after 4 months concentration.

[0046] The schematic diagram of the concentration of arsenic in willow and vetiv...

Embodiment 3

[0049] The joint strengthening management method of brassinolide, moisture and urea in this embodiment is as follows:

[0050] 1. The soil polluted by heavy metal lead (282.58 mg / kg) was crushed and passed through a 2 mm sieve;

[0051] 2. Apply 0.4 g / kg of urea to the soil and mix well, add 1 kg of mixed soil to each pot;

[0052] 3. Add water to the soil to ensure that the moisture content is about 70%±5, and use a moisture sensor to measure the moisture content;

[0053] 4. Cutting willow cuttings and sowing vetiver seeds in soil with a certain moisture content (70%±5), 1 willow per pot and 0.1 g of vetiver per pot;

[0054] 5. After planting willow and vetiver for 15 days, spray 24-epibrassinolide with a dilution concentration of 3000 times once a week (just distribute the water droplets on the leaf surface evenly), harvest and measure the heavy metal lead after 4 months concentration.

[0055] The detection results of lead concentration in willow and vetiver under the ...

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Abstract

The invention discloses a plant management method for heavy metal contaminated soil, which comprises the following steps of: firstly, adding urea into heavy metal contaminated soil, and maintaining the water content of the soil to be 50-70%; and then, planting willows and chrysopogon zizanioides in the heavy metal contaminated soil, and spraying 24-epibrassinolide 15 days after planting, thus realizing soil heavy metal contamination remediation. According to the method, the requirements for water, fertilizer and photosynthesis in the plant growth process are comprehensively considered, plant growth and heavy metal enrichment are promoted and the stress resistance of plants is improved through water and fertilizer regulation and physiological enhancement measures, and plant growth is promoted and enrichment of plants on cadmium, arsenic and lead is increased at the same time through combined regulation and control of urea, brassinolide and water. The combined regulation and control technology is easy to operate, extremely low in cost and environmentally friendly, and has extremely high application and popularization value.

Description

technical field [0001] The invention relates to the field of phytoremediation of heavy metal polluted soil, in particular to the application of a phytoremediation method for heavy metal cadmium, arsenic and lead polluted soil in combination with urea, brassinolide and water regulation. Background technique [0002] Soil is one of the main natural resources that human beings rely on for survival, and it is also an important component of the human ecological environment. With the rapid development of industry and agriculture, the extensive use of pesticides, fertilizers, and feed additives, as well as the discharge of various types of sewage and solid waste, have led to a large amount of harmful metal substances entering the environment. Heavy metals released into the environment gradually accumulate in the soil through physical, chemical or biological processes, resulting in soil heavy metal pollution. At present, soil heavy metal pollution has become an extremely serious en...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 郭红岩李业朴尹颖王国兵
Owner NANJING UNIV
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