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Organic fertilizer for lowering content of cadmium in soil and preparation method of organic fertilizer

An organic fertilizer and content technology, applied in the preparation of organic fertilizers, organic fertilizers, inorganic fertilizers, etc., can solve problems affecting the growth, development and quality of crops, reduce bioavailability, improve cadmium pollution, and improve soil properties. Effect

Inactive Publication Date: 2019-04-26
盐城紫环工业机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of organic fertilizer that reduces cadmium content in soil and preparation method thereof, to solve the existing problem that heavy metal cadmium in soil affects the growth and quality of crops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An organic fertilizer for reducing cadmium content in soil, comprising the following components (by mass percentage): urea: 2%, potassium sulfate: 5%, sodium nitrate: 1%, diammonium phosphate: 6%, sodium selenite: 1.5 %, nitrohumic acid: 17%, straw: 23%, biological agent: 5%, feces: 30%, and the balance is water.

[0026] Wherein, the feces are: human feces, livestock feces or poultry feces; the biological agent is: one, two or all of sulfur bacteria agents, nitrogen-fixing bacteria agents, and nitrifying bacteria agents.

[0027] A kind of preparation method of the organic fertilizer that reduces cadmium content in soil, comprises the following steps:

[0028] Step 1: Take urea, diammonium phosphate, sodium nitrate, potassium sulfate, sodium selenite, feces, straw, nitrohumic acid and biological bacteria in parts by weight, and reserve them respectively;

[0029] Step 2: Heat diammonium phosphate to 60°C and pour it into the reaction kettle, then add potassium sulfate...

Embodiment 2

[0036] An organic fertilizer for reducing cadmium content in soil, comprising the following components (by mass percentage): urea: 3%, potassium sulfate: 3%, sodium nitrate: 2%, diammonium phosphate: 4%, sodium selenite: 2% %, nitrohumic acid: 16%, straw: 24%, biological agent: 4%, feces: 35%, and the balance is water.

[0037] Wherein, the feces are: human feces, livestock feces or poultry feces; the biological agent is: one, two or all of sulfur bacteria agents, nitrogen-fixing bacteria agents, and nitrifying bacteria agents.

[0038] A kind of preparation method of the organic fertilizer that reduces cadmium content in soil, comprises the following steps:

[0039] Step 1: Take urea, diammonium phosphate, sodium nitrate, potassium sulfate, sodium selenite, feces, straw, nitrohumic acid and biological bacteria in parts by weight, and reserve them respectively;

[0040] Step 2: Heat the diammonium phosphate to 65°C and pour it into the reaction kettle, then add potassium sulf...

Embodiment 3

[0047] An organic fertilizer for reducing cadmium content in soil, comprising the following components (by mass percentage): urea: 4%, potassium sulfate: 1%, sodium nitrate: 3%, diammonium phosphate: 2%, sodium selenite: 2.5% %, nitrohumic acid: 15%, straw: 25%, biological agent: 3%, feces: 40%, and the balance is water.

[0048] Wherein, the feces are: human feces, livestock feces or poultry feces; the biological agent is: one, two or all of sulfur bacteria agents, nitrogen-fixing bacteria agents, and nitrifying bacteria agents.

[0049] A kind of preparation method of the organic fertilizer that reduces cadmium content in soil, comprises the following steps:

[0050]Step 1: Take urea, diammonium phosphate, sodium nitrate, potassium sulfate, sodium selenite, feces, straw, nitrohumic acid and biological bacteria in parts by weight, and reserve them respectively;

[0051] Step 2: Heat the diammonium phosphate to 70°C and pour it into the reaction kettle, then add potassium sul...

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Abstract

The invention discloses organic fertilizer for lowering the content of cadmium in soil. The organic fertilizer is prepared from the following components in percentage by mass: 2-4% of urea, 1-5% of potassium sulphate, 1-3% of sodium nitrate, 2-6% of diammonium phosphate, 1.5-2.5% of sodium selenite, 15-17% of nitrohumic acid, 23-25% of straw, 3-5% of a biological agent, 30-40% of faeces, and the balance of water. The invention further discloses a preparation method of the organic fertilizer for lowering the content of the cadmium in the soil. The preparation method includes seven steps. The principles that micro element fertilizer (iron, manganese, zinc, silicon fertilizer) and organic matter resist the cadmium, the micro element fertilizer (iron, manganese, zinc, silicon fertilizer) lowers the cadmium is mainly adopted, specifically, part of common ways for crops to absorb the cadmium, the iron, the zinc and other mineral elements exist, and when certain heavy metal in the soil is high in content and seriously pollutes the soil, another microelement which is slightly harmful to the crops and beneficial to crop growth at the low concentration can be used for antagonizing the heavymetal.

Description

technical field [0001] The invention relates to the technical field of organic fertilizers, in particular to an organic fertilizer for reducing cadmium content in soil and a preparation method thereof. Background technique [0002] Cadmium is a trace heavy metal element that is toxic to animals and plants. It is extremely toxic to the human body and is easily absorbed by the human body. Cadmium has high mobility and low toxic concentration. It has a long half-life and cannot be degraded by microorganisms in the soil. , is easily absorbed and accumulated by plants, and its pollution is an irreversible process, which will affect the yield and quality of crops after exceeding a certain limit. [0003] In recent years, due to the unreasonable discharge of industrial "three wastes", poor treatment of solid waste (especially urban waste), sewage irrigation, agricultural sludge, and application of fertilizers containing heavy metal elements, the content of heavy metal cadmium in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05F17/00C05G3/80
CPCC05B7/00C05F17/00C05G3/80C05G5/12C05C5/02C05C9/00C05C11/00C05D1/02C05D9/02C05F3/00C05F11/00C05F11/08Y02W30/40
Inventor 冯文君
Owner 盐城紫环工业机械有限公司
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