Novel sustained-release long-acting compound fertilizer and preparation method thereof

Abstract

The invention relates to a sustained-release long-acting fertilizer, in particular to a stable fertilizer capable of achieving sustained release and long acting by regulating the conversion process of mineral elements in soil by a novel composite regulating agent. The sustained-release long-acting fertilizer is prepared by mixing a compound fertilizer containing amide nitrogen or ammonium nitrogen with the novel composite regulating agent -in a certain proportion. The novel composite regulating agent is formed by compounding three types of substances in a proper proportion, wherein borax or boric acid simultaneously serves as a synergist for a urease inhibitor and a nitrification inhibitor, and as a plant essential nutrient element; dicyandiamide, 3,5-dimethyl pyrazole, 2-chloro-6-(trichloromethyl) pyridine or the like serve as the nitrification inhibitor; and a humic acid substance serves as the synergist. Compared with a traditional compound (composite) fertilizer, after the fertilizer added with the novel composite regulating agent is applied into soil, the conversion of the nutrient of the fertilizer in soil can be effectively regulated, furthermore the nutrient release period can be effectively prolonged, the nutrient utilization rate can be improved, and environment pollution can be reduced.

Description

technical field

[0001] The invention relates to a slow-release long-acting fertilizer, in particular to a stable fertilizer and a preparation method thereof which regulates nutrient conversion through a novel compound regulating agent, thereby realizing slow-release long-acting and high-efficiency fertilizers. Background technique

[0002] Nitrogen, phosphorus and potassium are the three major mineral nutrients necessary for the normal growth and development of plants, and play a huge role in promoting high agricultural yields. However, due to the particularity of the three elements, especially the transformation of nitrogen and phosphorus in the soil and the blind application of fertilizers, the utilization rate of fertilizers is very low. At present, the average utilization rate of nitrogen, phosphorus and potassium fertilizers of my country's three major food crops is only 27.5%, 11.6% and 31.5% respectively. In concentrated vegetable and fruit production areas with a re...

Examples

Embodiment 1

[0023] A novel slow-release long-acting compound fertilizer, in parts by weight, including 25 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 10 parts, the total nutrient content is 45%. The nitrification inhibitor is dicyandiamide, the dosage is 3% of the pure nitrogen dosage, the borax dosage is 5% of the pure nitrogen dosage, and the potassium humate dosage is 5% of the fertilizer dosage.

[0024] Nitrogen in the compound fertilizer is provided by urea and monoammonium phosphate, phosphorus is provided by monoammonium phosphate and superphosphate, and potassium is provided by potassium chloride. The weight of each raw material used is as follows: 497.4kg urea, 176.9kg monoammonium phosphate, 50kg superphosphate (containing 16% phosphorus), 166.7kg potassium chloride, 7.5kg dicyandiamide, 12.5kg borax, 50kg potassium humate, 40kg concave-convex stick powder.

[0025] Dicyandiamide, borax and potassium humate are fully mixed according to the requ...

Embodiment 2

[0027] A novel slow-release long-acting compound) fertilizer, calculated in parts by weight per ton, including 26 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 12 parts, the total nutrient content is 48%. The nitrification inhibitor is 3,5-dimethylpyrazole, the dosage is 2% of the pure nitrogen dosage, the boric acid dosage is 5% of the pure nitrogen dosage, and the ammonium humate dosage is 6% of the fertilizer dosage.

[0028] The nitrogen in the compound fertilizer is partly provided by urea, partly by monoammonium phosphate, phosphorus by monoammonium phosphate, and potassium by potassium chloride. The weights of the raw materials used are as follows: 515.0kg urea, 192.3kg monoammonium phosphate, 200kg potassium chloride, 5.2kg 3,5-dimethylpyrazole, 13kg boric acid, 60kg ammonium humate, 15kg bentonite.

[0029] Mix 3,5-dimethylpyrazole, boric acid and ammonium humate evenly according to the required amount, and then add them to the batching syste...

Embodiment 3

[0031] A novel slow-release long-acting compound fertilizer, calculated in parts by weight in one ton, including 28 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 10 parts, the total nutrient content is 48%. The nitrification inhibitor is 3,4-dimethylpyrazole phosphate, the dosage is 1.5% of the pure nitrogen dosage, the dosage of borax is 3% of the pure nitrogen dosage, and the dosage of calcium humate is 3% of the fertilizer dosage.

[0032] Nitrogen in the compound fertilizer is provided by urea and monoammonium phosphate, phosphorus is provided by monoammonium phosphate, and potassium is provided by potassium sulfate. The weights of the raw materials used are as follows: 558.5kg urea, 192.3kg monoammonium phosphate, 166.7kg potassium chloride, 4.2kg 3,4-dimethylpyrazole phosphate, 8.4kg borax, 30kg calcium humate, 40kg bentonite.

[0033] After mixing 3,4-dimethylpyrazole phosphate, borax and calcium humate evenly according to the required amount, ...

technical field

[0001] The invention relates to a slow-release long-acting fertilizer, in particular to a stable fertilizer and a preparation method thereof which regulates nutrient conversion through a novel compound regulating agent, thereby realizing slow-release long-acting and high-efficiency fertilizers. Background technique

[0002] Nitrogen, phosphorus and potassium are the three major mineral nutrients necessary for the normal growth and development of plants, and play a huge role in promoting high agricultural yields. However, due to the particularity of the three elements, especially the transformation of nitrogen and phosphorus in the soil and the blind application of fertilizers, the utilization rate of fertilizers is very low. At present, the average utilization rate of nitrogen, phosphorus and potassium fertilizers of my country's three major food crops is only 27.5%, 11.6% and 31.5% respectively. In concentrated vegetable and fruit production areas with a re...

Examples

Embodiment 1

[0023] A novel slow-release long-acting compound fertilizer, in parts by weight, including 25 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 10 parts, the total nutrient content is 45%. The nitrification inhibitor is dicyandiamide, the dosage is 3% of the pure nitrogen dosage, the borax dosage is 5% of the pure nitrogen dosage, and the potassium humate dosage is 5% of the fertilizer dosage.

[0024] Nitrogen in the compound fertilizer is provided by urea and monoammonium phosphate, phosphorus is provided by monoammonium phosphate and superphosphate, and potassium is provided by potassium chloride. The weight of each raw material used is as follows: 497.4kg urea, 176.9kg monoammonium phosphate, 50kg superphosphate (containing 16% phosphorus), 166.7kg potassium chloride, 7.5kg dicyandiamide, 12.5kg borax, 50kg potassium humate, 40kg concave-convex stick powder.

[0025] Dicyandiamide, borax and potassium humate are fully mixed according to the requ...

Embodiment 2

[0027] A novel slow-release long-acting compound) fertilizer, calculated in parts by weight per ton, including 26 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 12 parts, the total nutrient content is 48%. The nitrification inhibitor is 3,5-dimethylpyrazole, the dosage is 2% of the pure nitrogen dosage, the boric acid dosage is 5% of the pure nitrogen dosage, and the ammonium humate dosage is 6% of the fertilizer dosage.

[0028] The nitrogen in the compound fertilizer is partly provided by urea, partly by monoammonium phosphate, phosphorus by monoammonium phosphate, and potassium by potassium chloride. The weights of the raw materials used are as follows: 515.0kg urea, 192.3kg monoammonium phosphate, 200kg potassium chloride, 5.2kg 3,5-dimethylpyrazole, 13kg boric acid, 60kg ammonium humate, 15kg bentonite.

[0029] Mix 3,5-dimethylpyrazole, boric acid and ammonium humate evenly according to the required amount, and then add them to the batching syste...

Embodiment 3

[0031] A novel slow-release long-acting compound fertilizer, calculated in parts by weight in one ton, including 28 parts of nitrogen, phosphorus (P 2 o 5 ) 10 parts, potassium (K 2 O) 10 parts, the total nutrient content is 48%. The nitrification inhibitor is 3,4-dimethylpyrazole phosphate, the dosage is 1.5% of the pure nitrogen dosage, the dosage of borax is 3% of the pure nitrogen dosage, and the dosage of calcium humate is 3% of the fertilizer dosage.

[0032] Nitrogen in the compound fertilizer is provided by urea and monoammonium phosphate, phosphorus is provided by monoammonium phosphate, and potassium is provided by potassium sulfate. The weights of the raw materials used are as follows: 558.5kg urea, 192.3kg monoammonium phosphate, 166.7kg potassium chloride, 4.2kg 3,4-dimethylpyrazole phosphate, 8.4kg borax, 30kg calcium humate, 40kg bentonite.

[0033] After mixing 3,4-dimethylpyrazole phosphate, borax and calcium humate evenly according to the required amount, ...

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