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Novel organic fertilizer for controlling heavy metal cadmium pollution or accumulation of rice, preparation and application methods thereof

A technology of heavy metals and organic fertilizers, applied in the field of fertilizers

Active Publication Date: 2020-04-07
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All in all, there is still a lack of a widely applicable method and technology for controlling cadmium accumulation in rice at home and abroad.

Method used

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  • Novel organic fertilizer for controlling heavy metal cadmium pollution or accumulation of rice, preparation and application methods thereof
  • Novel organic fertilizer for controlling heavy metal cadmium pollution or accumulation of rice, preparation and application methods thereof
  • Novel organic fertilizer for controlling heavy metal cadmium pollution or accumulation of rice, preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: A kind of novel organic fertilizer that controls rice heavy metal cadmium pollution or accumulation

[0037] Based on 1000 kg of commercially available organic fertilizer with a water content of 15% (with cow dung as the main raw material, nitrogen, phosphorus and potassium are about 5%, and the cadmium content is lower than 0.8mg / kg), add ferrous sulfate calculated as iron 30kg, manganese sulfate 90kg, zinc sulfate 5kg, copper sulfate 0.5kg.

[0038] This organic fertilizer is prepared according to the following steps:

[0039] 1) mixing and stirring the organic materials, iron salts, manganese salts, zinc salts, and copper salts in the parts by weight to be evenly powdered;

[0040] 2) Use an extruder or a granulator to make the uniform powder in step 1) into granules with a particle diameter of 0.3-1.2 cm, which is an organic fertilizer for controlling the pollution or accumulation of heavy metal cadmium in rice.

[0041] Specific experiment 1: Experi...

Embodiment 2

[0059] Embodiment 2: a kind of organic fertilizer that controls rice heavy metal cadmium pollution or accumulation

[0060] Based on 1000 kg of rice straw (cadmium content less than 0.6 mg / kg) or sawdust (sourced from wood processing plants) or milk vetch with a water content of 15%, add 30 kg of ferrous sulfate calculated as iron, calculated as manganese 90kg of manganese sulfate, 5kg of zinc sulfate in zinc, 0.5kg of copper sulfate in copper, and 10kg of citric acid.

[0061] This organic fertilizer is prepared according to the following steps:

[0062] 1) mixing and stirring the organic materials, iron salts, manganese salts, zinc salts, and copper salts in the parts by weight to be evenly powdered;

[0063] 2) Use an extruder or a granulator to make the uniform powder in step 1) into granules with a particle diameter of 0.3-1.2 cm, which is an organic fertilizer for controlling the pollution or accumulation of heavy metal cadmium in rice.

[0064] Specific experiment 4: ...

Embodiment 3

[0070] Embodiment 3: a kind of organic fertilizer that controls rice heavy metal cadmium pollution or accumulation

[0071] Based on 1000 kilograms of city bagasse with a water content of 15%, add 30 kg of ferrous sulfate in terms of iron, 90 kg of manganese sulfate in terms of manganese, 5 kg of zinc sulfate in terms of zinc, 0.5 kg of copper sulfate in terms of copper, Citric acid 10kg or chelating agent EDTA disodium salt 5kg.

[0072] This organic fertilizer is prepared according to the following steps:

[0073] 1) mixing and stirring the organic materials, iron salts, manganese salts, zinc salts, copper salts, organic acids and their salts, and organic chelating agents in the parts by weight to be evenly powdered;

[0074] 2) Use an extruder or a granulator to make the uniform powder in step 1) into granules with a particle diameter of 0.3-1.2 cm, which is an organic fertilizer for controlling the pollution or accumulation of heavy metal cadmium in rice.

[0075] Specif...

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Abstract

Belonging to the technical field of fertilizers, the invention discloses a novel organic fertilizer for controlling heavy metal cadmium pollution or accumulation of rice, a preparation method and an application method thereof. The preparation method includes: taking 100kg of an organic material with a water content of 15% as the basis, adding 0.05-5kg of a ferric salt in terms of iron, and addinga manganese salt, a zinc salt and a copper salt according to that a mass ratio of the ferric salt in terms of iron, a manganese salt in terms of manganese, a zinc salt in terms of zinc and a copper salt in terms of copper is 1:0.2-8:0.08-2:0.001-0.5. The organic fertilizer disclosed by the invention is researched and developed on the basis of a chemical process of heavy metal cadmium in rice fieldsoil, a rice root system absorption process and a plant cadmium transfer process, has the characteristics of convenient application, low dosage, low price and low use cost, is universally suitable for heavy, medium and light cadmium-polluted farmlands in China, and has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a novel organic fertilizer for controlling the pollution or accumulation of heavy metal cadmium in rice and its preparation and application methods. Background technique [0002] Heavy metals such as cadmium, lead, and mercury are non-essential elements for plants and have toxic effects on plant growth. They are important heavy metal pollutants for crop growth and food safety. These toxic heavy metals accumulate excessively in food, and then enter the food chain, seriously threatening human health. According to the results of the 2002 and 2003 rice quality and safety surveys conducted by the Rice and Product Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture, one of the quality and safety problems of rice is that heavy metals such as cadmium and lead exceed the standard, and the exceeding rate exceeds 10%. Industrial "three wastes",...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80A01G22/22A01C21/00
CPCA01G22/22A01C21/005C05D9/02C05F3/00C05F5/002C05G1/00C05G5/12C05F11/00C05F9/00C05D9/00C05G3/80
Inventor 黄奇娜邵国胜
Owner CHINA NAT RICE RES INST
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