Long-effective composite fertilizer with high nitrogen content and production thereof

A compound fertilizer and compound fertilizer technology, applied in fertilizer mixture, fertilization device, application, etc., can solve the problems of fertilizer nutrient loss, increased nitrous oxide pollution, and too late for crops to absorb it

Inactive Publication Date: 2005-12-28
李建华 +1
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  • Application Information

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Problems solved by technology

After the fertilizer is applied, due to the presence of microorganisms in the soil that decompose nitrogen fertilizers, the transformation, volatilization, leaching and physical and chemical fixation of fertilizer nutrients (nitrogen) are accelerated, resulting in nitrogen utilization in fertilizers. The fertilizer efficiency is low and the fertilizer effect period is short. Because the nutrient release rate in the compound fertilizer is fast, it cannot be synchronized with the crop absorption, so that the crop does not have time to absorb it, resulting in serious loss of fertil

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  • Long-effective composite fertilizer with high nitrogen content and production thereof

Examples

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Example Embodiment

[0033] Example 1:

[0034] Weigh 45kg of urea, 20kg of monoammonium phosphate, 17kg of potassium chloride, 13kg of brown coal powder, 5kg of light burnt magnesium powder, 0.25kg of dicyandiamide, and 0.1kg of 4-aminotriazole by weight. Granulation, drying, sieving, and packaging are carried out in a drum granulator, and the particle size is controlled to 3-5 mm to obtain a long-acting high-nitrogen compound fertilizer with a total nutrient content of 44%.

Example Embodiment

[0035] Example 2:

[0036] Weigh 50 kg of urea with a particle size of 3-5 mm, 20 kg of large particles of monoammonium phosphate, 18 kg of large particles of potassium chloride, 10 kg of large particles of brown coal powder, 0.4 kg of vegetable oil, 0.25 kg of dicyandiamide, and 4-aminotriazole. 0.1kg, firstly mix 0.25kg of dicyandiamide and 0.1kg of 4-aminotriazole to prepare a nitrogen fertilizer long-acting agent for use; coat the urea with vegetable oil evenly and mix it with the nitrogenous fertilizer long-acting agent to obtain the outer surface Evenly adhere to a layer of urea granules of nitrogen fertilizer long-acting agent. Finally, it is conventionally mixed with large-particle phosphate fertilizer, large-particle potash fertilizer and large-particle brown coal powder. After mixing, it is dried, sieved, and packaged according to the conventional process to obtain a long-acting high nitrogen with a total nutrient content of 47%. Compound fertilizer.

[0037] The prepara...

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Abstract

A high-nitrogen and long-acting composite fertilizer and its production are disclosed. The fertilizer consists of nitrogen-phosphorus-potassium composite mixed fertilizer and nitrogen fertilizer persistent agent which is 0.4-1.2wt% and consists of dicyanamide 0-8 proportion and 4-aminotriazole 1-3 proportion. N:P2O5:K2O=18-25:7-18:6-15 in composite fertilizer. The process is carried out by mixing dicyanamide with 4-aminotriazole proportionally to prepare nitrogen fertilizer persistent agent, coating granular nitrogen fertilizer from vegetable oil and mixing it with nitrogen fertilizer persistent agent, mixing with granular phosphorus-potassium fertilizer to prepare composite mixed fertilizer, mixing nitrogen fertilizer persistent agent with nitrogen-phosphorus-potassium composite mixed fertilizer, and mixing with other normal additives. It achieves good proportioning, high nitrogen utilization and long fertilizer service life.

Description

technical field [0001] The invention relates to a compound fertilizer, in particular to a high-nitrogen long-acting compound fertilizer and a production method thereof. Background technique [0002] The world's most advanced nitrogen, phosphorus, and potassium compound fertilizer production line introduced by our country at present has applied dual-process supporting technology to produce a 15% nitrogen, phosphorus, and potassium content (N:P 2 o 5 : K 2 O=1:1:1), a three-material compound fertilizer with a total nutrient content of 45%. After the fertilizer is applied, due to the presence of microorganisms in the soil that decompose nitrogen fertilizers, the transformation, volatilization, leaching and physical and chemical fixation of fertilizer nutrients (nitrogen) are accelerated, thus leading to nitrogen utilization in fertilizers. The fertilizer efficiency is low and the fertilizer effect period is short. Because the nutrient release rate in the compound fertilizer ...

Claims

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Application Information

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IPC IPC(8): C05G1/00
Inventor 张志明李建华
Owner 李建华
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