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Method for intercropping remediation of medium-low-concentration cadmium-arsenic composite polluted farmland soil by using pumpkin and Amaranthus mangostanus L

A technology for compound pollution and amaranth seeds is applied in the field of low-concentration cadmium-arsenic compound-contaminated farmland soil, and in the field of treatment and restoration of low-concentration cadmium-arsenic compound-contaminated farmland soil. The effect of food security, ensuring people's life safety and improving efficiency

Active Publication Date: 2019-11-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pumpkin (Pumpkin) is a melon vegetable that people often eat in daily life. In recent years, it has become more popular because of its special nutritional and health effects. The research on remediation of heavy metal cadmium pollution in farmland soil has not been reported yet

Method used

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  • Method for intercropping remediation of medium-low-concentration cadmium-arsenic composite polluted farmland soil by using pumpkin and Amaranthus mangostanus L
  • Method for intercropping remediation of medium-low-concentration cadmium-arsenic composite polluted farmland soil by using pumpkin and Amaranthus mangostanus L
  • Method for intercropping remediation of medium-low-concentration cadmium-arsenic composite polluted farmland soil by using pumpkin and Amaranthus mangostanus L

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 A method for repairing medium and low concentration cadmium and arsenic complex polluted farmland soil by intercropping pumpkin and grain amaranth

[0037] Such as figure 1 As shown, in the subtropical region of Tangxin Village, Wengyuan County, Shaoguan City, a low-concentration cadmium-arsenic compound-contaminated paddy field, an experiment was carried out to remediate the low-concentration cadmium-arsenic compound-contaminated paddy field soil with pumpkin and grain amaranth intercropping. Due to the long-term impact of heavy metal sewage in the Dabaoshan mining area, this area has become cadmium-arsenic compound polluted soil. After multi-point sampling and testing, the cadmium content of the soil in the test field is 0.45mg / kg, and the arsenic content is 78.80mg / kg. The experimental field was originally a paddy field, and early rice was planted in 2018. After the early rice was harvested, the straw was cleaned and the soil was dried in July 2018. The soi...

Embodiment 2

[0056] Example 2 A method of using pumpkin and grain amaranth intercropping to restore medium and low concentration cadmium and arsenic complex polluted farmland soil

[0057] Such as figure 2 and image 3 As shown, in the subtropical region of Tangxin Village, Wengyuan County, Shaoguan City, a low-concentration cadmium-arsenic compound-contaminated paddy field, an experiment was carried out to remediate the low-concentration cadmium-arsenic compound-contaminated paddy field soil with pumpkin and grain amaranth intercropping. Due to the long-term impact of heavy metal sewage in the Dabaoshan mining area, this area has become cadmium-arsenic compound polluted soil. After multi-point sampling and testing, the cadmium content of the soil in the test field is 0.75mg / kg, and the arsenic content is 128.0mg / kg. The test field was originally a paddy field. After the early rice was harvested, the straw was cleaned and the soil was dried, and the soil was plowed to a depth of 15-20 cm...

Embodiment 3

[0066] Example 3 A method of using pumpkin and grain amaranth intercropping to restore medium and low concentration cadmium and arsenic compound polluted farmland soil

[0067] In the middle and low concentration of cadmium and arsenic compound polluted paddy field in Tangxin Village, Wengyuan County, Shaoguan City, which is located in the subtropical region, an experiment was carried out to remediate the medium and low concentration of cadmium and arsenic compound polluted rice field soil with pumpkin and grain amaranth intercropping. Due to the long-term impact of heavy metal sewage in the Dabaoshan mining area, this area has become cadmium-arsenic compound polluted soil. After multi-point sampling and testing, the cadmium content of the soil in the test field is 0.85mg / kg, and the arsenic content is 132.0mg / kg. The test field was originally a paddy field. After the early rice was harvested, the straw was cleaned and the soil was dried, and the soil was plowed to a depth of 1...

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Abstract

The invention discloses a method for intercropping remediation of medium-low-concentration cadmium-arsenic composite polluted farmland soil by using pumpkin and Amaranthus mangostanus L. The method comprises: planting pumpkin and Amaranthus mangostanus L in cadmium-arsenic-polluted farmland soil in an intercropping planting manner, wherein an intercropping plant line number ratio of pumpkin to Amaranthus mangostanus L is 1:2-3; during remediation, maintaining the field moist, and maintaining the soil moisture content at 58-80%; applying 250-550 kg of a compound fertilizer and 5500-7500 kg of an organic fertilizer on per hectare of the soil; after the pumpkin matures, simultaneously harvesting the pumpkin and the Amaranthus mangostanus L, and obtaining the pumpkin fruits; and transferring the roots, the stems and the leaves of the pumpkin and the whole Amaranthus mangostanus L out of the field, and carrying out sanitary landfill or being used as a garden and park composting raw materialso as to transfer heavy metals out of the farmland. According to the present invention, with the method, the yield of pumpkin can be stabilized or increased, the contents of cadmium and arsenic in edible pumpkin fruits are lower than the national food safety standard, the efficient extraction of cadmium and arsenic by Amaranthus mangostanus L can be promoted, and the simultaneous remediation andproduction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of heavy metal polluted soil treatment. Specifically, it relates to a method of using intercropping planting technology of low-accumulative crops and high-accumulative heavy metal plants to treat and repair farmland soils compounded with low-concentration cadmium and arsenic; more specifically, it relates to a method for remediating medium-low Concentration of cadmium and arsenic complex pollution method of farmland soil. Background technique [0002] With the rapid development of my country's industry and agriculture, a large amount of heavy metals such as cadmium, arsenic, and lead enter the farmland soil environment through mining, sludge agricultural use, sewage irrigation, atmospheric deposition, rainwater erosion, and surface runoff, endangering the farmland soil environment. The ecological system has pollution risks to the quality and safety of agricultural products, and there are also relatively larg...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 黎华寿康智明周梦雅秦俊豪李智鸣
Owner SOUTH CHINA AGRI UNIV
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