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Method for remediating cadmium-contaminated soil by utilizing solanum nigrum and corn intercropping plants

A cadmium-contaminated soil and phytoremediation technology, which is applied in the field of phytoremediation of cadmium-contaminated soil by using nightshade and corn intercropping, can solve the problem that the absorption efficiency of heavy metal pollutants is not high enough, the biomass of nightshade is not large, and the quality and economic benefits of corn cannot be guaranteed. To achieve the effect of promoting germination as soon as possible, reducing deposition distribution and increasing germination rate

Active Publication Date: 2020-07-14
河北江尚环境治理集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method for repairing cadmium-contaminated soil by using nightshade and corn intercropping plants, which solves the problem that the biomass of nightshade is not large, the absorption efficiency of heavy metal pollutants in the soil is not high enough, and the quality of corn cannot be guaranteed when intercropping with corn and economical issues

Method used

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  • Method for remediating cadmium-contaminated soil by utilizing solanum nigrum and corn intercropping plants
  • Method for remediating cadmium-contaminated soil by utilizing solanum nigrum and corn intercropping plants
  • Method for remediating cadmium-contaminated soil by utilizing solanum nigrum and corn intercropping plants

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Experimental program
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Effect test

Embodiment 1

[0031] Select 0.5 mu of arable land as a demonstration field, and do three repeated experiments. First, soak the Solanum nigrum seeds with the soaking solution at a temperature of 25°C, take them out and dry them after 8 hours; the mass-component ratio of the soaking solution is 3:0.8:2:2:10 : 60% pullulan, phytase, gibberellin, sodium carbonate, calcium nitrate, sterile water mixed directly;

[0032] Before sowing, prepare the land, apply 45 kg of three-element compound fertilizer per mu as base fertilizer, and plow 30 cm;

[0033] When sowing, first plant corn, the reserved row width of corn is 80cm, and the distance between corn plants is 25cm. Sowing nightshade will be carried out after 8 days after the emergence of corn seedlings. 2 plants;

[0034] After the wild nightshade blooms, apply 15kg / mu of fortified fertilizer to corn and wild nightshade, and the fortified fertilizer includes phytic acid, glycolic acid, and manganese sulfate with a mass component ratio of 12:7:...

Embodiment 2

[0045] Select 0.5 mu of arable land as a demonstration field, and do three repeated experiments. First, soak Solanum solanum nigrum seeds with the soaking solution at a temperature of 23°C, take them out and dry them after 12 hours; the mass-component ratio of the soaking solution is 3:0.5:2.8: 2:10:45 pullulan, phytase, gibberellin, sodium carbonate, calcium nitrate, and sterile water are directly mixed;

[0046] Before sowing, prepare the land, apply 50 kg of three-element compound fertilizer per mu as base fertilizer, and plow 25 cm;

[0047] When sowing, first plant corn, the reserved row width of corn is 70cm, and the distance between corn plants is 30cm. After 5 days after the emergence of corn, nightshade is sown. Solanum solanum is planted by hole sowing, and the hole distance is 30cm. 1 plant;

[0048] After the wild nightshade blooms, apply 20kg / mu of fortified fertilizer to corn and wild nightshade, and the fortified fertilizer includes phytic acid, glycolic acid, ...

Embodiment 3

[0051] Select 0.5 mu of arable land as a demonstration field and do three repeated experiments. First, soak Solanum solanum nigrum seeds with the soaking solution at a temperature of 28°C, take them out and dry them after 5 hours; the mass-component ratio of the soaking solution is 3:1:1.5: 2:10:70 pullulan, phytase, gibberellin, sodium carbonate, calcium nitrate, sterile water mixed directly;

[0052] Before sowing, prepare the land, apply 40kg of three-element compound fertilizer per mu as base fertilizer, and plow 35cm;

[0053] When sowing, first plant corn, the reserved row width of corn is 90cm, and the distance between corn plants is 20m. After 10 days of corn emergence, nightshade is sown. Solanum solanum is planted by hole sowing, and the distance between holes is 20cm. 3 plants;

[0054] After the wild nightshade blooms, apply 10kg / mu of fortified fertilizer to corn and wild nightshade, and the fortified fertilizer includes phytic acid, glycolic acid, and manganese ...

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Abstract

The invention belongs to the technical field of soil remediation, and provides a method for remediating cadmium-contaminated soil by utilizing solanum nigrum and corn intercropping plants, which comprises the following steps: A, soaking solanum nigrum seeds with a seed soaking solution; B, sowing corn seeds and nightshade seeds in an intercropping mode, and after nightshade blooms, applying a strong chemical fertilizer to corn and nightshade; and C, after corn seeds are mature, harvesting corn and nightshade at the same time, wherein the seed soaking solution comprises pullulan, phytase, gibberellin, sodium carbonate, calcium nitrate and sterile water in a mass ratio of 3:(0.5-1):(1.5-2.8):2:10:(45-70). The method solves the problems that the biomass of solanum nigrum is not large, the absorption efficiency of the solanum nigrum to heavy metal pollutants in soil is not high enough, and the quality and economic benefits of corn cannot be guaranteed during corn intercropping.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and relates to a method for remediating cadmium-contaminated soil by using nightshade and corn intercropping plants. Background technique [0002] As a new environmental restoration technology, phytoremediation has the advantages of low cost, no damage to the site structure, no secondary pollution of groundwater, beautification of the environment, and easy acceptance by the society. However, due to the shortcomings of phytoremediation technology, it is still difficult to be widely used, mainly including: first, the phytoremediation cycle is long and the restoration efficiency is low. The effect and speed of phytoremediation depend on the biomass production per unit area and the concentration of heavy metals in the aboveground parts. Although hyperaccumulator plants have strong enrichment ability, they generally have the characteristics of small biomass and slow growth, while plants with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 赵秋国
Owner 河北江尚环境治理集团有限公司
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