Method for improving quality of corn planted on Cd (cadmium)-polluted soil

A technology for cadmium contamination of soil and corn, applied in the fields of botanical equipment and methods, plant cultivation, horticulture, etc., can solve the problem of high cadmium content in corn, and achieve the effects of consistent growth period, significantly reduced, and reduced absorption effect.

Pending Publication Date: 2018-11-30
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI +1
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  • Abstract
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Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for improving the quality of corn planted on cadmium-contaminated soil, to solve the problem of high cadmium content in corn when corn repairs cadmium-contaminated soil, and to make the method easier to popularize and conform to reality demand for agricultural production

Method used

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  • Method for improving quality of corn planted on Cd (cadmium)-polluted soil
  • Method for improving quality of corn planted on Cd (cadmium)-polluted soil
  • Method for improving quality of corn planted on Cd (cadmium)-polluted soil

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Embodiment 1

[0023] The heavy metal polluted brown soil and clay in a city in northern Henan Province were selected for pot experiment. The polluted area has a temperate continental monsoon climate, with an annual average temperature of 14°C, an annual sunshine duration of about 2400 hours, and an annual average rainfall of 656.3 mm. The Cd concentration of the soil is 1.59 mg / kg, and the specific physical and chemical properties are shown in Table 1.

[0024] Table 1 Basic physical and chemical properties of soil

[0025]

[0026] Zhengdan 958, the main corn variety promoted in North China, is a new hybrid corn variety of Zheng 58 / Chang 7-2 (selected) used by Henan Academy of Agricultural Sciences. The whole growth period is about 103 days. The most widely planted corn variety.

[0027] Four treatments were set up in the experiment, namely corn monocropping, corn-maranth intercropping, corn-ryegrass intercropping, corn-wild nightshade intercropping, and each treatment was repeated 3 ...

Embodiment 2

[0038] The heavy metal polluted brown soil and clay in a city in northern Henan Province were selected for pot experiment. The polluted area has a temperate continental monsoon climate, with an annual average temperature of 14°C, an annual sunshine duration of about 2400 hours, and an annual average rainfall of 656.3 mm. The Cd concentration of the soil is 1.71 mg / kg, and the specific physical and chemical properties are shown in Table 3.

[0039] Table 3 Basic physical and chemical properties of soil

[0040]

[0041] Zhengdan 958, the main corn variety promoted in North China, is a new hybrid corn variety of Zheng 58 / Chang 7-2 (selected) used by Henan Academy of Agricultural Sciences. The whole growth period is about 103 days. The most widely planted corn variety.

[0042] Four treatments were set up in the experiment, namely corn monocropping, corn-maranth intercropping, corn-ryegrass intercropping, corn-wild nightshade intercropping, and each treatment was repeated 3 ...

Embodiment 3

[0053] The heavy metal polluted brown soil and clay in a city in northern Henan Province were selected for pot experiment. The polluted area has a temperate continental monsoon climate, with an annual average temperature of 14°C, an annual sunshine duration of about 2400 hours, and an annual average rainfall of 656.3 mm. The Cd concentration of the soil is 1.83mg / kg, and the specific physical and chemical properties are shown in Table 5.

[0054] Table 5 Basic physical and chemical properties of soil

[0055]

[0056] Zhengdan 958, the main corn variety promoted in North China, is a new hybrid corn variety of Zheng 58 / Chang 7-2 (selected) used by Henan Academy of Agricultural Sciences. The whole growth period is about 103 days. The most widely planted corn variety.

[0057] Four treatments were set up in the experiment, namely corn monocropping, corn-maranth intercropping, corn-ryegrass intercropping, corn-wild nightshade intercropping, and each treatment was repeated 3 t...

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Abstract

The invention provides a method for improving quality of corn planted on Cd (cadmium)-polluted soil. The method comprises the following steps of uniformly interplanting corn and super-accumulated plant (wild solanum nigrum) on the Cd-polluted soil, wherein the planting density of corn is two plants per one square meter, and the planting density of wild solanum nigrum is eight plants per one squaremeter; performing conventional water and fertilizer management in the corn and super-accumulated plant growth process, wherein the content of Cd in the Cd-polluted soil is 1.59 to 1.92mg / kg, and thevariety of corn is Zhengdan958. The method has the advantages that the cost is lower, the method is suitable for being popularized, any adverse effect to environment is avoided, and the concentrationof Cd in each organ of the harvested corn is obviously reduced; the transfer of Cd from underground part to ground part of the corn is inhibited, and the effect of reducing the Cd absorption of corn is very obvious; the content of Cd in the corn grain produced by the method meets the current national standard (GB2762-2012 Limit of Pollutants in Foods).

Description

technical field [0001] The invention belongs to the field of phytoremediation technology of heavy metal-contaminated soil and the technical field of agricultural product quality and safety, and in particular relates to a method for improving the quality of corn planted on cadmium-contaminated soil. Background technique [0002] my country did not carry out investigations on cadmium pollution in farmland soil until the middle and late 1970s. According to the 1980 China Agricultural Environmental Report, the area of ​​cadmium pollution in farmland soil in my country was 9333hm 2 , by 2003 the area of ​​cultivated land polluted by cadmium in my country was 1.33×10 4 hm 2 , and the cadmium content in the soil of 11 sewage irrigation areas has reached the level of producing "cadmium rice". In recent years, with the development of my country's industry, due to the large-scale application of chemical fertilizers and pesticides, the agricultural utilization of industrial wastewate...

Claims

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Application Information

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IPC IPC(8): A01G22/20A01G22/00
CPCA01G22/00A01G22/20
Inventor 范洪黎宋正国霍文敏邹茸王丽迟克宇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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