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Method for restoring slight and medium cadmium polluted soil by maize-capsicum intercropping

A technology for cadmium-contaminated soil and corn, applied in the field of repairing contaminated soil, can solve unrealistic problems, achieve the effects of promoting growth, avoiding food safety problems, and reducing cadmium content

Inactive Publication Date: 2015-04-01
福建沃土环保集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, heavy metal pollution in my country's soil is becoming more and more serious, and it is unrealistic to stop farming in a large area of ​​farmland that is moderately or slightly polluted by heavy metals and carry out long-term engineering or phytoremediation.

Method used

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  • Method for restoring slight and medium cadmium polluted soil by maize-capsicum intercropping
  • Method for restoring slight and medium cadmium polluted soil by maize-capsicum intercropping
  • Method for restoring slight and medium cadmium polluted soil by maize-capsicum intercropping

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Embodiment 1

[0019] 1. The Sanying Chaotian pepper selected in the present invention has strong resistance, high yield, and high content of capsanthin and capsaicin, and the corn variety Jinzhumi is a low-accumulation crop of cadmium. CdSO 4 ·8H 2 O Evenly dry and sieve the soil so that the cadmium content in the soil reaches 5 mg / kg, place it for 1 month to make the heavy metals evenly distributed, and turn it over once a week during this period. Build a square pool with a length of 4 meters, a width of 4 meters, and a depth of 0.25 meters. Put a plastic sheet on the bottom of the pool, and put the treated polluted soil on the plastic sheet. Pepper and corn are planted in intercropping mode. Pepper and corn are arranged according to the field layout of 2 rows of pepper and 2 rows of corn. The distance between peppers is 0.5 meters and the distance between plants is 0.4 meters; the distance between rows of corn is 0.4 meters and the distance between plants is 0.4 meters. Meter. In addit...

Embodiment 2

[0024] 1. The pepper is Mitaka Chaotian pepper, and the corn is golden pearl honey. The soil is the vegetable field in a vegetable greenhouse in Damintun No. 1 Village, Xinmin, Shenyang, and the cadmium content in the soil is 1.21 mg / kg. Build a square pool with a length of 4.8 meters, a width of 4 meters, and a depth of 0.25 meters. Put a plastic sheet on the bottom of the pool, and put the treated polluted soil on the plastic sheet. Pepper and corn are intercropped. Pepper and corn are arranged in a field layout of 6 rows of pepper and 2 rows of corn. The row spacing of pepper is 0.5 meters and the distance between plants is 0.4 meters; the distance between rows of corn is 0.4 meters and the distance between plants is 0.4 meters. Meter. In addition, two ponds with a width of 2 meters and a length of 4 meters were built, and the same concentration of contaminated soil was placed on them, and peppers and corn were planted separately as a single control.

[0025] 2. The field...

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Abstract

The invention discloses a method for restoring slight and medium cadmium polluted soil by maize-capsicum intercropping, and relates to a polluted soil restoring method. Capsicum and maize with a genetic relationship are simultaneously planted in an intercropping mode, 2-6 rows of capsicum and 2 rows of maize are distributed in a field, the variety of the capsicum is mitaka pod pepper, and the variety of the maize is nugget honey. Field management and fertilization of crops are performed according to a single cropping method for the capsicum and the maize. The maize is harvested when the maize is ripe, and the capsicum is harvested when the capsicum is red. The cadmium content of the maize is reduced to a national regulated safe eating standard. The capsicum is used for extracting capsaicin and capsanthin for industries such as medical treatment, military affairs and cosmetics. Growth of the capsicum is promoted by maize-capsicum intercropping, the capsicum takes away a large amount of heavy metal from soil and is used for the non-food industry, the content of the heavy metal in the vegetable soil is reduced, and safety of agricultural products is guaranteed.

Description

technical field [0001] The invention relates to a method for remediating polluted soil, in particular to a method for remediating mildly cadmium-polluted soil by intercropping capsicum and corn. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. However, with the development of social modernization and production, the problem of soil environmental pollution is becoming more and more serious. Among them, heavy metal cadmium has polluted a large area of ​​soil due to the diffusion, settlement and accumulation of cadmium in industrial waste residues and exhaust gases, irrigation of farmland with cadmium-containing wastewater, and application of cadmium-containing pesticides and phosphate fertilizers. At present, my country's cadmium-contaminated farmland is about 13,000 hectares, involving 25 regions in 11 provinces and cities. Every year, 5.0×10 cadmium rice with a cadmium conte...

Claims

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Application Information

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IPC IPC(8): A01G1/00B09C1/00
CPCA01G22/00B09C1/105B09C2101/00
Inventor 侯永侠杨晶胡晓钧李玉双宋雪英杨继松
Owner 福建沃土环保集团有限公司
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