Method for reducing pollution caused by heavy metals including arsenic, lead, cadmium and mercury in paddy rice

A technology for heavy metals and rice, applied in the field of mercury and heavy metal pollution, cadmium, reducing arsenic and lead in rice, can solve the problems of high cost, unbearable for farmers, large iron fertilizer, etc.

Inactive Publication Date: 2012-02-22
CHANGSHA SANYUAN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 200710070666.4 has disclosed that soil heavy metal cadmium can enter the plant through the iron absorption and metabolism pathway of rice, and invented agronomic measures to control the accumulation of heavy metal cadm

Method used

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  • Method for reducing pollution caused by heavy metals including arsenic, lead, cadmium and mercury in paddy rice

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1: Experiment of reducing heavy metal Cd pollution by combined use of manganese and selenium fertilizer in rice variety Teyou 388

[0014] 1. Test materials

[0015] The test site was located in Jiangbei Village, Changsha County, Hunan Province. The tested rice variety was Teyou 388. Seedlings were transplanted on June 12 and harvested on October 8. Jiangbei soil type and chemical properties are pH 6.20, organic matter 43.7g / kg, total nitrogen 2.89g / kg, alkali hydrolyzed nitrogen 221.0mg / kg, available phosphorus 3.9mg / kg, available potassium 124.0mg / kg, total cadmium 0.50 mg / kg, total lead 49.7mg / kg, total arsenic 12.1mg / kg, total chromium 113.3mg / kg, total mercury 0.03mg / kg.

[0016] 2. Specific experimental design

[0017] Using field plot test, parallel processing 6 plots, each plot area is 6 m×6 m=36 m 2 The base fertilizer is compound fertilizer (NPK15-15-15) 25 kg / mu, and the top dressing is urea (10 kg / mu). Spray manganese-containing humic acid fertilizer with ...

Example Embodiment

[0027] Example 2: Experiment of reducing heavy metal Cd pollution by combining manganese and selenium fertilizers in rice variety Huang Huazhan

[0028] 1. Test materials

[0029] The test site was Huangxing Town, Changsha County, Hunan Province. The test rice variety was Huang Huazhan. Seedlings were transplanted on June 27 and harvested on October 16. The soil type and chemical properties of Huangxing Town are pH 4.90, organic matter 33.7g / kg, total nitrogen 2.06g / kg, alkali hydrolyzed nitrogen 223.0mg / kg, available phosphorus 4.2mg / kg, available potassium 82.0mg / kg, total cadmium 9.02mg / kg, total lead 41.1mg / kg, total arsenic 13.3mg / kg, total chromium 81.8mg / kg, total mercury 0.06mg / kg.

[0030] 2. Specific experimental design

[0031] Using field plot test, parallel processing 6 plots, each plot area is 6 m×6 m=36 m 2 The base fertilizer is compound fertilizer (NPK15-15-15) 60 kg / mu, and the top dressing is urea (12 kg / mu). Spray manganese-containing humic acid fertilizer with ...

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Abstract

The invention discloses a method for reducing pollution caused by heavy metals including arsenic, lead, cadmium and mercury in paddy rice. The method comprises the following steps of: (1) spraying a bivalent manganese fertilizer in the amount of 2-30 grams per mu at the initial booting stage of paddy rice, and irrigating into a paddy field within 2-3 days; and (2) spraying a selenium fertilizer in the amount of 1-5 grams per mu at the full heading stage of the paddy rice. Due to the adoption of the method, the content of heavy metals in the paddy rice can be lowered, and the yield as well as the content of trace mineral nutritional elements in rice can be increased.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a method for reducing heavy metal pollution of arsenic, lead, cadmium and mercury in rice. Background technique [0002] Heavy metals such as arsenic, lead, cadmium, and mercury are environmental pollutants that are toxic to animals and plants, and they have strong mobility in the paddy soil-rice system. This kind of heavy metal pollution not only affects the yield of rice, but also easily accumulates in rice, which seriously affects the hygienic and nutritional quality of rice. After being eaten by people, it poses a serious potential threat to human health. In recent years, with the massive development of the mining industry, excessive discharge of industrial "three wastes", poor treatment of solid waste, and agricultural use of industrial waste, the content of heavy metals such as arsenic, lead, cadmium, and mercury in the soil has increased sharply. It is a...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01C21/00C05D9/02A01G22/22
Inventor 柳伏龙
Owner CHANGSHA SANYUAN AGRI TECH
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