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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
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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 cadmium in rice by applying chelated ferrous fertilizer to the soil. This technology requires a large amount of Iron fertilizer, the cost is also relatively large, and it is difficult for farmers to bear in practical application

Method used

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

Examples

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Effect test

Embodiment 1

[0013] Example 1: The experiment of reducing the pollution of heavy metal Cd in rice variety Teyou 388 by manganese fertilizer and selenium fertilizer

[0014] 1. Test materials

[0015] The test site is located in Jiangbei Village, Changsha County, Hunan Province. The test rice variety is Teyou 388, which was transplanted on June 12 and harvested on October 8. The soil type and chemical properties of Jiangbei are pH 6.20, organic matter 43.7g / kg, total nitrogen 2.89g / kg, alkaline 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] The field plot experiment was adopted, and 6 plots were processed in parallel, and the area of ​​each plot was 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). At the...

Embodiment 2

[0027] Example 2: The experiment of reducing heavy metal Cd pollution by manganese fertilizer and selenium fertilizer combined in rice variety Huanghuazhan

[0028] 1. Test materials

[0029] The test site is Huangxing Town, Changsha County, Hunan Province. The test rice variety is Huanghuazhan. It was transplanted on June 27 and harvested on October 16. The soil type and chemical properties of Huangxing Town are pH4.90, organic matter 33.7g / kg, total nitrogen 2.06g / kg, alkaline 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] The field plot experiment was adopted, and 6 plots were processed in parallel, and the area of ​​each plot was 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 mang...

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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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