Slow-release nitrogenous fertilizer of containing middle quantity and trace elements

Abstract

This invention discloses a sustained-release nitrogen fertilizer containing secondary and trace elements. The sustained-release nitrogen fertilizer is composed of: urea 10-96 parts, ammonium sulfate 0.1-78.8 parts, attapulgite powder 0-8 parts, ammonium chloride 0.1-78.8 parts, magnesium sulfate 0.05-2.0 parts, borax 0.01-1 part, copper sulfate 0.01-0.2 part, manganese sulfate 0.01-0.6 part, ferrous sulfate 0.01-1 part, zinc sulfate 0.01-1 part, acetohydroxamic acid 0.01-0.02 part, composite amino acids 0.01-1 part, and dicyandiamide 0.01-0.2 part. The sustained-release nitrogen fertilizer is prepared by: mixing the above components, adding into a disc granulator, spraying an appropriate amount of water, granulating and drying. The sustained-release nitrogen fertilizer has such advantages as long effective period and high effective utilization rate (above 45%). Crops applied with the sustained-release nitrogen fertilizer have such advantages as high stress resistance and high yield.

Description

technical field

[0001] The invention relates to a slow-release nitrogen fertilizer containing medium and trace elements, which belongs to the field of chemical industry. Background technique

[0002] With the reform of my country's agricultural planting structure, the amount of nitrogen fertilizer is increasing year by year. However, the utilization rate of conventional nitrogen fertilizers is only 25% to 35%, and the remaining part of nitrogen flows into the air and groundwater, causing great pollution to the atmosphere and water resources. The topdressing of a single nitrogen fertilizer makes the nutrition of crops seriously unbalanced, and the deficiencies that affect crop yield and quality are becoming more and more obvious. However, at present, there is no high-quality nitrogen fertilizer that can improve the utilization rate of nitrogen fertilizer, reduce environmental pollution, and promote the nutritional balance of crops, improve crop stress resistance, increase yi...

Examples

Embodiment 1

[0012] Example 1: 33.7 parts of urea (N: 46%), 10 parts of ammonium sulfate (N: 21%), 6 parts of attapulgite powder (hydrous magnesium aluminum silicate), 50 parts of ammonium chloride (N: 25%) 1 part, 1 part of borax, 2 parts of magnesium sulfate, 0.01 part of copper sulfate, 0.2 part of manganese sulfate, 0.2 part of ferrous sulfate, 0.5 part of zinc sulfate, 0.04 part of acetohydroxamic acid, 1 part of compound amino acid, 0.08 part of dicyandiamide, After fully mixing, spray an appropriate amount of water in a disc granulator to granulate, and after drying, you can get a slow-release nitrogen fertilizer with a nitrogen content of 30% and medium and trace elements such as S, Mg, Fe, Zn, Cu, Mn, Cl, B, etc. .

Embodiment 2

[0013] Example 2: 90 parts of urea (N: 46%), 5.5 parts of attapulgite powder (hydrous magnesium aluminum silicate), 1.2 parts of borax, 0.1 part of magnesium sulfate, 0.02 part of copper sulfate, 0.5 part of manganese sulfate, sulfurous acid 1 part of iron, 0.8 part of zinc sulfate, 0.01 part of acetohydroxamic acid, 0.8 part of compound amino acid, 0.09 part of dicyandiamide, mix well, spray appropriate amount of water in the disc granulator to granulate, and get the nitrogen content after drying 41.4% slow-release nitrogen fertilizer containing trace elements such as S, Mg, Fe, Zn, Cu, Mn, Cl, B, etc.

Embodiment 3

[0014] Example 3: 96 parts of urea, 0.1 part of ammonium sulfate, 0.1 part of ammonium chloride, 0.5 part of magnesium sulfate, 0.2 part of copper sulfate, 0.6 part of manganese sulfate, 1 part of ferrous sulfate, 0.1 part of borax, 0.5 part of bar powder, 0.1 part of amino acid, 0.2 part of acetohydroxamic acid, 0.2 part of dicyandiamide, after mixing fully, spray appropriate amount of water in the disc granulator to granulate, and after drying, the nitrogen content is 41.4%, containing S, Mg, Fe, Zn , Cu, Mn, Cl, B and other medium and trace elements slow-release nitrogen fertilizer.

technical field

[0001] The invention relates to a slow-release nitrogen fertilizer containing medium and trace elements, which belongs to the field of chemical industry. Background technique

[0002] With the reform of my country's agricultural planting structure, the amount of nitrogen fertilizer is increasing year by year. However, the utilization rate of conventional nitrogen fertilizers is only 25% to 35%, and the remaining part of nitrogen flows into the air and groundwater, causing great pollution to the atmosphere and water resources. The topdressing of a single nitrogen fertilizer makes the nutrition of crops seriously unbalanced, and the deficiencies that affect crop yield and quality are becoming more and more obvious. However, at present, there is no high-quality nitrogen fertilizer that can improve the utilization rate of nitrogen fertilizer, reduce environmental pollution, and promote the nutritional balance of crops, improve crop stress resistance, increase yi...

Examples

Embodiment 1

[0012] Example 1: 33.7 parts of urea (N: 46%), 10 parts of ammonium sulfate (N: 21%), 6 parts of attapulgite powder (hydrous magnesium aluminum silicate), 50 parts of ammonium chloride (N: 25%) 1 part, 1 part of borax, 2 parts of magnesium sulfate, 0.01 part of copper sulfate, 0.2 part of manganese sulfate, 0.2 part of ferrous sulfate, 0.5 part of zinc sulfate, 0.04 part of acetohydroxamic acid, 1 part of compound amino acid, 0.08 part of dicyandiamide, After fully mixing, spray an appropriate amount of water in a disc granulator to granulate, and after drying, you can get a slow-release nitrogen fertilizer with a nitrogen content of 30% and medium and trace elements such as S, Mg, Fe, Zn, Cu, Mn, Cl, B, etc. .

Embodiment 2

[0013] Example 2: 90 parts of urea (N: 46%), 5.5 parts of attapulgite powder (hydrous magnesium aluminum silicate), 1.2 parts of borax, 0.1 part of magnesium sulfate, 0.02 part of copper sulfate, 0.5 part of manganese sulfate, sulfurous acid 1 part of iron, 0.8 part of zinc sulfate, 0.01 part of acetohydroxamic acid, 0.8 part of compound amino acid, 0.09 part of dicyandiamide, mix well, spray appropriate amount of water in the disc granulator to granulate, and get the nitrogen content after drying 41.4% slow-release nitrogen fertilizer containing trace elements such as S, Mg, Fe, Zn, Cu, Mn, Cl, B, etc.

Embodiment 3

[0014] Example 3: 96 parts of urea, 0.1 part of ammonium sulfate, 0.1 part of ammonium chloride, 0.5 part of magnesium sulfate, 0.2 part of copper sulfate, 0.6 part of manganese sulfate, 1 part of ferrous sulfate, 0.1 part of borax, 0.5 part of bar powder, 0.1 part of amino acid, 0.2 part of acetohydroxamic acid, 0.2 part of dicyandiamide, after mixing fully, spray appropriate amount of water in the disc granulator to granulate, and after drying, the nitrogen content is 41.4%, containing S, Mg, Fe, Zn , Cu, Mn, Cl, B and other medium and trace elements slow-release nitrogen fertilizer.