Organic-inorganic compound fertilizer

Abstract

The invention discloses an organic-inorganic compound fertilizer, which comprises a lignite nitrification humic substance, an inorganic fertilizer and a granulating adjuvant, wherein the organic humic substance is more than or equal to 10 mass percent; the mass ratio of the organic nitrogen / inorganic nitrogen is 1:1-1.2; the mass ratio of carbon / nitrogen is 1:10-30; the sum of nitrogen, phosphorus and potassium is more than or equal to 25 mass percent; and free water is less than or equal to 10 percent. Lignite is oxidized by nitric acid and then a humic acid raw material is extracted; the humic acid and fulvic acid content is obviously improved; the production cost of the humic acid fertilizer can be reduced; and resources are saved. The organic-inorganic compound fertilizer can improve soil nutrient condition and granular structure and meet the requirement of crop growth.

Description

technical field

[0001] The invention belongs to the field of agricultural fertilizers, and relates to an organic-inorganic compound fertilizer, in particular to an organic-inorganic compound fertilizer using lignite as an organic humic acid source. Background technique

[0002] The pollution and harm of chemical fertilizers to soil are becoming more and more serious. For example, the pollution of nitrogen fertilizer to soil, according to statistics, the utilization rate of nitrogen fertilizer is only about 30%, the loss rate of volatilization is about 20%, the loss of leaching is about 10%, the loss of denitrification and denitrification is about 15%. And the water loss rate is about 15%, and the total loss is more than 60%. The lost nitrogen will directly pollute the environment after leaving the soil, thus bringing new pollution.

[0003] On the other hand, the pollution of agricultural products by chemical fertilizers is mainly fruits and vegetables, and the pollution o...

Examples

Embodiment 1

[0049] The sum of nitrogen, phosphorus and potassium content ≥ 25%: formula N-P 2 o 5 -K 2 O is 11-5-9

[0050] Specific proportions: lignite nitrated humic acid 250-350kg, attapulgite soil powder 110-180kg, urea 180-230kg, potassium chloride 90-160kg;

[0051] Granulation process: use two ball forming machines in series to granulate, the material making temperature is 55-60 ℃, and the return material ratio is 1:0.3.

Embodiment 2

[0053] The sum of nitrogen, phosphorus and potassium content ≥ 30%: formula N-P 2 o 5 -K 2 O is 15-8-7

[0054] Specific proportions: lignite nitrated humic acid 200-280kg, kaolin 15-70kg, urea 190-270kg, chicken manure 15-60kg, potassium chloride 70-140kg;

[0055] Process: use two ball forming machines in series to granulate, the material making temperature is 55-60 ℃, and the return material ratio is 1:0.3.

Embodiment 3

[0057] The sum of nitrogen, phosphorus and potassium content ≥ 45%: formula N-P 2 o 5 -K 2 O for 20-12-13

[0058] Specific proportions: lignite nitrated humic ammonium salt 150-190kg, ammonium dihydrogen phosphate 180-260kg, urea 340-430kg, kaolin 9-13kg, potassium chloride 190-250kg, ammonium sulfate 25-50kg.

[0059] Granulation process: Before granulation, use refined lignite to nitrify humic acid ammonium salt, mix with urea and water in a mass ratio of 3.1:0.9:1, add salt (ammonium dihydrogen phosphate, potassium chloride, ammonium sulfate) and adjust the viscosity agent to 50°C to make a slurry matrix. When urea powder is added to the rotating granulator during granulation, the prepared slurry matrix is ​​sprayed so that nitrohumic acid is evenly wrapped around the urea granules, and then quickly dried and sieved to obtain nitrate Humic acid urea complex compound fertilizer.

technical field

[0001] The invention belongs to the field of agricultural fertilizers, and relates to an organic-inorganic compound fertilizer, in particular to an organic-inorganic compound fertilizer using lignite as an organic humic acid source. Background technique

[0002] The pollution and harm of chemical fertilizers to soil are becoming more and more serious. For example, the pollution of nitrogen fertilizer to soil, according to statistics, the utilization rate of nitrogen fertilizer is only about 30%, the loss rate of volatilization is about 20%, the loss of leaching is about 10%, the loss of denitrification and denitrification is about 15%. And the water loss rate is about 15%, and the total loss is more than 60%. The lost nitrogen will directly pollute the environment after leaving the soil, thus bringing new pollution.

[0003] On the other hand, the pollution of agricultural products by chemical fertilizers is mainly fruits and vegetables, and the pollution o...

Examples

Embodiment 1

[0049] The sum of nitrogen, phosphorus and potassium content ≥ 25%: formula N-P 2 o 5 -K 2 O is 11-5-9

[0050] Specific proportions: lignite nitrated humic acid 250-350kg, attapulgite soil powder 110-180kg, urea 180-230kg, potassium chloride 90-160kg;

[0051] Granulation process: use two ball forming machines in series to granulate, the material making temperature is 55-60 ℃, and the return material ratio is 1:0.3.

Embodiment 2

[0053] The sum of nitrogen, phosphorus and potassium content ≥ 30%: formula N-P 2 o 5 -K 2 O is 15-8-7

[0054] Specific proportions: lignite nitrated humic acid 200-280kg, kaolin 15-70kg, urea 190-270kg, chicken manure 15-60kg, potassium chloride 70-140kg;

[0055] Process: use two ball forming machines in series to granulate, the material making temperature is 55-60 ℃, and the return material ratio is 1:0.3.

Embodiment 3

[0057] The sum of nitrogen, phosphorus and potassium content ≥ 45%: formula N-P 2 o 5 -K 2 O for 20-12-13

[0058] Specific proportions: lignite nitrated humic ammonium salt 150-190kg, ammonium dihydrogen phosphate 180-260kg, urea 340-430kg, kaolin 9-13kg, potassium chloride 190-250kg, ammonium sulfate 25-50kg.

[0059] Granulation process: Before granulation, use refined lignite to nitrify humic acid ammonium salt, mix with urea and water in a mass ratio of 3.1:0.9:1, add salt (ammonium dihydrogen phosphate, potassium chloride, ammonium sulfate) and adjust the viscosity agent to 50°C to make a slurry matrix. When urea powder is added to the rotating granulator during granulation, the prepared slurry matrix is ​​sprayed so that nitrohumic acid is evenly wrapped around the urea granules, and then quickly dried and sieved to obtain nitrate Humic acid urea complex compound fertilizer.

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