CN103483095B - Special slow/controlled release compound fertilizer for capsicum, and preparation method thereof - Google Patents

Abstract

The invention provides a special slow/controlled release fertilizer for capsicum, which is characterized by comprising 0.10%-0.15% of n-butyl thiophosphate triamine or hydroquinone and 0.25%-0.30% of dicyandiamide, calculated by mass percentage. The invention combines nitrogen, phosphorus, potassium, magnesium, boron, zinc and other large, medium and trace element fertilizers with high-quality, decomposed rapeseed meal, chicken manure and other organic fertilizers, and adds urease inhibitors and nitrification inhibitors to mix and prepare , can have a slow-release effect in the soil, rich in various nutrient elements required for the growth of peppers, can meet the nutrient needs of different growth and development stages of peppers for a long time, and effectively increase the yield of peppers.

Description

Special slow-control/release compound fertilizer for pepper and preparation method thereof

technical field

The invention relates to the field of compound fertilizers, in particular to a slow-control slow-release compound fertilizer specially used for peppers and a preparation method thereof.

Background technique

Pepper ( Capsicum annum L.) is an annual or perennial herbaceous plant that can bear spicy or sweet berries in the Capsicum genus of the Solanaceae family. my country is the country with the largest planting area of pepper in the world, and it is planted all over the country. The annual planting area reaches 1.33 million hectares, accounting for the second place in my country's vegetable planting area. Ripe green fruits can be fried and made into kimchi. Ripe red fruits can be salted and marinated in sauce, or dried into dried chili and made into chili powder. It is a fresh vegetable and condiment that people like to eat, especially in Sichuan, Guizhou, Southwest China. People in Yunnan, Gansu and Shaanxi in the northwest, and Hunan and Jiangxi in central China are especially fond of it, and it is a must for every meal. In addition, the peel and placental tissue of peppers contain capsaicin (C ₁₈ H ₂₇ NO ₃ ) and vitamins A, C and other nutrients, and have a fragrant spicy taste, which can promote appetite, help digestion and medicine. .

At present, the fertilizers used on peppers in the market are mainly traditional fertilizer varieties, such as elemental urea, superphosphate, potassium chloride, and nitrogen, phosphorus, and potassium ternary compound fertilizers, etc., which generally do not contain medium and trace elements. The production-increasing effect of the fertilizer can be brought into full play. Moreover, since the growth period or the harvest period of the pepper is long, it needs to be topdressed many times, which is time-consuming and labor-intensive, and also increases the production cost.

In addition, there is a problem that the amount of fertilizer used in vegetable fertilization is too large, and the utilization rate of fertilizer is relatively low. The heavy nitrogen phenomenon is very common in pepper production, and the utilization rate of nitrogen fertilizer is less than 30%. The unused nitrogen fertilizer or leaching into the water body causes eutrophication of the water body, or volatilizes to cause air pollution, or deposits in the soil, causing soil nitric acid Salt and nitrite enrichment. Excessive fertilization not only reduces the economic effect of farmers, but also brings environmental pollution, and long-term consumption of foods high in nitrate and nitrite will affect human health through the food chain, and in severe cases cause digestive tract cancer.

Contents of the invention

The invention provides a special slow-controlled release fertilizer for capsicum with high utilization rate and long fertilizer effect time.

The object of the present invention is achieved by the following measures:

A special slow and controlled release fertilizer for peppers, characterized in that it contains 0.10% to 0.15% of n-butylthiophosphate triamine (nBPT) or hydroquinone (HQ), and 0.25% to 0.30% of dicyandiamide (DCD). percentage meter. The invention has an effective slow-release effect on the nutrient elements in the soil and fertilizer, controls the nitrification reaction speed, reduces the loss of nitrogen, improves the utilization rate of nitrogen fertilizer, and increases the yield; it can also reduce nitrate and nitrite in soil and vegetables content, improve the quality of crops, and at the same time reduce the pollution of soil, groundwater and air when the amount of nitrogen fertilizer is too high.

Preferably, the above special fertilizer for peppers has nBPT purity ≥ 97.0%, HQ purity ≥ 99%, and DCD purity ≥ 99.5%.

The above special slow and controlled release fertilizer for peppers also includes urea 24%-28%, monoammonium phosphate 18%-20%, potassium sulfate 35%-38%, magnesium sulfate 0.5%-1.0%, boric acid 0.015%-0.020%, sulfuric acid Zinc 0.03~0.05%, rapeseed meal 8%~12%, chicken manure 5%~8%, calculated by mass percentage. Preferably, urea 25%, monoammonium phosphate 18%, potassium sulfate 36%, magnesium sulfate 0.7%, boric acid 0.016%, zinc sulfate 0.044%, rapeseed meal 10.5%, chicken manure 6.84%. Compared with other vegetables, pepper needs a lot of fertilizer and is also highly dependent on fertilizer. 3/5 of N, P and 2/3 of K come from fertilizers, and only 2/5 of N, P and 1/3 of K come from soil. Compared with food crops, pepper likes potassium, and the absorption ratio of nitrogen and potassium is more than 1:1.2. In addition, peppers also have special requirements for medium and trace elements. The invention is a mixture of chemical fertilizers and green organic fertilizers, which can not only significantly increase the yield of peppers and improve the quality of peppers, but also improve the status quo of soil quality, increase soil fertility, improve soil microbial environment, promote the growth of plant roots, and improve the resistance of peppers. The fertilizer of the present invention is rich in nutrients, which not only increases soil organic colloids, but also decomposes and converts many organic matter into organic colloids by virtue of the action of microorganisms, greatly increases the soil adsorption surface, and produces many sticky substances, making soil particles It is cemented into a stable aggregate structure, which improves the performance of soil water retention, fertilizer retention and air permeability, as well as the ability to regulate soil temperature. Thereby improving soil physical, chemical and biological properties, ripening soil, and fertilizing the soil.

The above special fertilizer for pepper also includes 2% to 3% of bentonite, calculated by mass percentage. Bentonite is a hydrous clay mineral mainly composed of montmorillonite, and the content of montmorillonite is 85%~90%. It can make the fertilizer have strong hygroscopicity and expansibility, make it have good physical and chemical properties, combine the fertilizer with the soil organically, and give full play to the fertility of the fertilizer and the soil.

Preferably, the above urea is urea containing N≥46%, the monoammonium phosphate is ammonium phosphate containing N≥10% and P ₂ O ₅ ≥40%, and the potassium sulfate is sulfuric acid containing K ₂ O≥50%. Potassium and magnesium sulfate adopt magnesium sulfate containing Mg≥9.5%, zinc sulfate adopts zinc sulfate containing Zn≥21%, and boric acid adopts boric acid containing B≥17%, all by weight percentage.

Further, in order to release the fertilizer in a balanced manner and achieve a slow release effect, preferably, the above-mentioned rapeseed meal particles are ≤0.4 mm, the chicken manure particles are ≤0.4 mm, and the bentonite particles are ≤0.25 mm; more preferably, the above-mentioned rapeseed meal particle size The particle size of chicken manure particles is 0.1-0.25 mm, and the particle size of bentonite particles is 0.1 mm.

Another object of the present invention is to provide a preparation method of the above-mentioned slow and controlled-release fertilizer for peppers.

The preparation method of the above-mentioned special slow and controlled release fertilizer for peppers comprises the following steps:

a. Preparation of organic compound: mix rapeseed meal and chicken manure with the particle size of 0.3-0.4mm, add 1%-2% urea, stir evenly, and then add 2-3mol/l A rapid decomposer composed of equal volumes of H ₂ SO ₄ , H ₃ PO ₄ and HNO ₃ , the mass ratio of the organic mixture of rapeseed meal, chicken manure and urea to the decomposer is 1:0.4-0.5, fully Stir evenly and react to obtain a decomposed organic compound;

b. Preparation of inorganic composites: Mix the amount of monoammonium phosphate, potassium sulfate, magnesium sulfate, boric acid and zinc sulfate, add 0.5-1 times the amount of water as the mixture, and dissolve it at 50-60°C. After cooling, dehydration and drying, the nitrogen, phosphorus and potassium trace element inorganic compound is obtained;

c. Mix the organic compound prepared in step a, the inorganic compound prepared in step b and the remaining urea evenly, pulverize, add bentonite with a particle size of 0.1-0.25 mm, stir evenly, and granulate to obtain the special fertilizer for pepper .

Beneficial effect

1. The present invention combines chemical fertilizers with high-quality organic fertilizers, and can have a slow-release effect in the soil. It is rich in various nutrient elements specially required for the growth of peppers, and can meet the nutrient needs of peppers in different growth and development stages for a long time. Among them, the total nutrients of nitrogen, phosphorus and potassium are more than 38%, and the organic matter is more than 10%, which can effectively increase the yield of pepper.

2. The fertilizer utilization rate of the present invention is high, and the utilization rate of nitrogen fertilizer can reach 59.7%~76.2%. The fertilizer effect time is long, reaching more than 60~70 days. Cooperating with the harvest time of peppers, it can meet the nutrient needs of different growth and development stages of peppers, effectively reduce the amount of fertilizer used and the frequency of fertilization, reduce production costs, and reduce environmental pollution.

3. The present invention effectively improves the yield of peppers. After using this special slow-control/release compound fertilizer, the yield of peppers is 2852~3394 kg/667m ² , which is the control compared with the treatment of conventional compound fertilizers (yield is 2544 kg/667m ² ) Increase production by 12.1%~33.4%; improve pepper quality at the same time, after using this special slow-control/release compound fertilizer, the Vc content of pepper is 33.45~39.44 mg/100g, compared with the treatment of conventional compound fertilizer (Vc content is 31.80 mg/100g) increased by 5.2%~24.0%; after treatment with this special slow-control/release compound fertilizer, the amino acid content of pepper was 967.9~1164.9 ug/100g, which was higher than that of conventional compound fertilizer (amino acid content was 928.5 mg/100g) 100g) increased by 4.2%~25.5%; after treatment with this special slow-control/release compound fertilizer, the reducing sugar content of pepper was 0.366%~0.415%, which was higher than that of conventional compound fertilizer (reducing sugar content was 0.359%) Increased by 2.0%~15.6%; after using this special slow-control/release compound fertilizer treatment, the capsaicin content is 17.78~18.64 mg/100g, which is higher than the treatment of conventional compound fertilizer (capsaicin content is 17.56 mg/100g) After using this special slow-control/release compound fertilizer, the nitrate content of pepper was 229.7-274.1 mg/kg, which was lower than that of conventional compound fertilizer (nitrate content was 192.1 mg/kg). 19.6%~42.7%. The fruit peel is bright and clean, the coloring is uniform, the fruit shape is plump, and the quality of pepper is obviously improved.

4. The present invention has a wide range of sources of raw materials, simple product manufacturing process, and less investment in equipment.

5. The present invention has an effective slow-release effect on nitrogen nutrients in the soil, controls the nitrification reaction speed, reduces the loss of nitrogen, and greatly reduces the content of nitrate and nitrite in the soil. After using this special slow-control/release compound fertilizer, the nitrate nitrogen content in the soil is 29.7~45.1 mg/kg, which is lower than the critical standard of soil nitrate nitrogen (60 mg/kg), which is better than the treatment of conventional compound fertilizer (The soil nitrate nitrogen content is 67.1 mg/kg, the content is greater than the critical value) decreased by 32.8%~55.7%; after using this special slow-control/release compound fertilizer, the nitrite nitrogen content in the soil is 0.16~0.32 mg/kg, which was 45.8%~72.9% lower than that of conventional compound fertilizer (soil nitrite nitrogen content was 0.59 mg/kg). Reduce the pollution of soil, groundwater and air when the amount of nitrogen fertilizer is too high, no pollution, and friendly to the environment.

6. During the ammonia volatilization cultivation process of ^the fertilizer of the present invention, the ammonia volatilization rate of the large granule urea is ^5.39 mg ^?? d ^-1 , the cumulative ammonia volatilization of large granular urea measured on the 70th day was 72.71 mg??kg ^-1 , and the cumulative ammonia volatilization of 52.47 for pepper special slow-release fertilizer was 24.84% less than that of equal nitrogen large granular urea. Effectively reduces the ammonia volatilization rate of fertilizers.

Detailed ways

The present invention is specifically described below through the examples, it is necessary to point out that the following examples are only used to further illustrate the present invention, and can not be interpreted as limiting the protection scope of the present invention, those skilled in the art can according to the content of the present invention above Some non-essential improvements and adjustments are made to the present invention.

Example 1

A preparation method of pepper slow-control/release compound fertilizer, comprising 24% to 28% of urea, 18% to 20% of monoammonium phosphate, 35% to 38% of potassium sulfate, and 0.5% to magnesium sulfate in weight percent 1.0%, boric acid 0.015%~0.020%, zinc sulfate 0.03~0.05%, rapeseed meal 8%~12%, chicken manure 5%~8%, bentonite 2%~3%, n-butyl triamine thiophosphate or Hydroquinone 0.10% ~ 0.15%, dicyandiamide 0.25% ~ 0.30% as raw materials, according to the following steps:

a. Preparation of organic compound: mix rapeseed meal and chicken manure with the particle size of 0.3-0.4mm, add 1%-2% urea, stir evenly, and then add 2-3mol/l A rapid decomposer composed of equal volumes of H ₂ SO ₄ , H ₃ PO ₄ and HNO ₃ , the mass ratio of the organic mixture of rapeseed meal, chicken manure and urea to the decomposer is 1:0.4-0.5, fully Stir evenly and react to obtain a decomposed organic compound;

b. Preparation of inorganic composites: Mix the amount of monoammonium phosphate, potassium sulfate, magnesium sulfate, boric acid and zinc sulfate, add 0.5-1 times the amount of water as the mixture, and dissolve it at 50-60°C. After cooling, dehydration and drying, the nitrogen, phosphorus and potassium trace element inorganic compound is obtained;

c. Mix the organic compound prepared in step a, the inorganic compound prepared in step b and the remaining urea evenly, pulverize, add bentonite with a particle size of 0.1-0.25 mm, stir evenly, and granulate to obtain the special fertilizer for pepper .

After using this special slow-control/release compound fertilizer, the yield of pepper was 2852~3394 kg/667m ² , which was 12.1%~33.4% higher than that of the control (yield 2544 kg/667m ² ) with conventional compound fertilizer. The Vc content of pepper is 33.45~39.44 mg/100g, which is 5.2%~24.0% higher than that of conventional compound fertilizer (Vc content is 31.80 mg/100g); The content is 967.9~1164.9 ug/100g, which is 4.2%~25.5% higher than that of conventional compound fertilizer (the amino acid content is 928.5 mg/100g); after using this special slow-control/release compound fertilizer, the reducing sugar content of pepper It is 0.366%~0.415%, which is 2.0%~15.6% higher than that of conventional compound fertilizer (reducing sugar content is 0.359%); after using this special slow-control/release compound fertilizer, the capsaicin content is 17.78~ 18.64 mg/100g, which is 1.23%~6.12% higher than the treatment of conventional compound fertilizer (capsaicin content is 17.56 mg/100g); after using this special slow-control/release compound fertilizer, the nitrate content of pepper is 229.7~ 274.1 mg/kg, which is 19.6%~42.7% lower than that of conventional compound fertilizer (nitrate content is 192.1 mg/kg). The fruit peel is bright and clean, the coloring is uniform, the fruit shape is plump, and the quality of pepper is obviously improved.

After using this special slow-control/release compound fertilizer, the nitrate nitrogen content in the soil is 29.7~45.1 mg/kg, which is lower than the critical standard of soil nitrate nitrogen (60 mg/kg), which is better than the treatment of conventional compound fertilizer (The soil nitrate nitrogen content is 67.1 mg/kg, the content is greater than the critical value) decreased by 32.8%~55.7%; after using this special slow-control/release compound fertilizer, the nitrite nitrogen content in the soil is 0.16~0.32 mg/kg, which was 45.8%~72.9% lower than that of conventional compound fertilizer (soil nitrite nitrogen content was 0.59 mg/kg).

Example 2

A preparation method of capsicum slow-control/release compound fertilizer, comprising 28% urea, 18% ammonium phosphate, 35% potassium sulfate, 0.93% magnesium sulfate, 0.02% boric acid, 0.05% zinc sulfate, vegetable 10% of seed meal, 5.05% of chicken manure, 2.5% of bentonite, 0.15% of hydroquinone, and 0.30% of dicyandiamide are used as raw materials, and the following steps are carried out:

a. Preparation of organic compound: mix rapeseed meal, chicken manure and soybean meal with particle size of 0.1-0.25 mm, add 1%-2% urea, stir evenly, and then add urea at a concentration of 3mol/l A rapid decomposer composed of equal volumes of H ₂ SO ₄ , H ₃ PO ₄ and HNO ₃ , the mass ratio of the organic mixture of rapeseed meal, chicken manure, soybean meal and urea to the decomposer is 1:0.5, fully Stir evenly and act for 72 hours at 50°C-60°C to obtain a decomposed organic compound;

b. Preparation of inorganic composites: Mix the amount of ammonium phosphate, potassium sulfate, magnesium sulfate, boric acid and zinc sulfate, add water that is twice the amount of the mixture, dissolve it at 50-60°C, cool, Dehydration and drying to obtain nitrogen, phosphorus and potassium trace element inorganic complexes;

c. Mix the organic compound prepared in step a, the inorganic compound prepared in step b and the remaining urea evenly, pulverize, add bentonite with a particle size of 0.1mm, stir evenly, and granulate to obtain the special fertilizer for pepper.

The yield of peppers applied with special slow-control/release compound fertilizers was 2877.2~3264.7 kg/667m ² , an increase of 13.10%~28.33%; the vitamin C content of peppers applied with special slow-control/release compound fertilizers was 34.31~37.73 mg/100g, increased by 7.90%~18.65%; the amino acid content of peppers applied with special slow-control/release compound fertilizers was 972.2~1095.9 mg/100g, an increase of 4.71%~18.03%; The sugar content was 0.367%~0.403%, an increase of 2.11%~12.21%; after using this special slow-control/release compound fertilizer, the capsaicin content was 18.12~18.46 mg/100g, an increase of 3.19%~5.12% compared with the control ; After being treated with this special slow-control/release compound fertilizer, the nitrate content in pepper fruit was 232.9-264.0 mg/kg, which was 21.2%-37.4% lower than that of the control. The fruit peel is bright and clean, the coloring is even, and the fruit shape is plump. The utilization rate of nitrogen fertilizer was 59.7%~68.3%, the fertilizer effect time reached more than 70 days, and the residual nitrate and nitrite in the soil were 31.3~43.8 mg/kg and 0.23~0.32 mg/kg, respectively.

Example 3

A pepper slow-control/release compound fertilizer, comprising 24% urea, 20% monoammonium phosphate, 38% potassium sulfate, 0.5% magnesium sulfate, 0.015% boric acid, 0.03% zinc sulfate, and rapeseed meal in weight percent 9%, chicken manure 6.105%, bentonite 2%, n-butyl triamine thiophosphate 0.10%, dicyandiamide 0.25% are raw materials, prepared by the preparation method of Example 1.

The yield of peppers applied with special slow-control/release compound fertilizers was 2879.3~3222.6 kg/667m ² , an increase of 13.18%~27.11%; the vitamin C content of peppers applied with special slow-control/release compound fertilizers was 34.31~35.03 mg/100g, Compared with the control, it increased by 7.90%~10.18%; the amino acid content of peppers using the special slow-control/release compound fertilizer was 967.5~1071.6 mg/100g, which was 4.2%~15.41% higher than the control; the application of the special slow-control/release compound fertilizer The reducing sugar content of capsicum is 0.380%~0.397%, which is 5.8%~10.5% higher than that of the control; after being treated with this special slow-control/release compound fertilizer, the capsaicin content is 17.94~18.31 mg/100g, which is higher than that of the control After using this special slow-control/release compound fertilizer, the nitrate content in pepper fruit was 229.2-266.8 mg/kg, which was 19.3%-38.9% lower than that of the control. The fruit peel is bright and clean, the coloring is even, and the fruit shape is plump. The utilization rate of nitrogen fertilizer was 59.7%~66.4%, the fertilizer effect time reached more than 70 days, and the residual nitrate and nitrite in the soil were 30.4~42.8 mg/kg and 0.19~0.27 mg/kg, respectively.

Example 4

A pepper slow-control/release compound fertilizer, comprising 28% urea, 18% monoammonium phosphate, 35% potassium sulfate, 1% magnesium sulfate, 0.02% boric acid, 0.05% zinc sulfate, and rapeseed meal in weight percent 8%, chicken manure 6.48%, bentonite 3%, hydroquinone 0.15%, dicyandiamide 0.30% are raw materials, prepared by the preparation method of Example 1.

The yield of peppers applied with special slow-control/release compound fertilizers was 2906.1~3154.8 kg/667m ² , an increase of 14.23%~24.01%; the vitamin C content of peppers applied with special slow-control/release compound fertilizers was 34.46~35.84 mg/100g, Increased by 8.38%~12.69%; the amino acid content of peppers using special slow-control/release compound fertilizers was 967.7~1092.3 mg/100g, an increase of 4.22%~17.64%; the reduction of peppers using special slow-control/release compound fertilizers The sugar content is 0.375%~0.402%, an increase of 4.54%~11.78%; after using this special slow-control/release compound fertilizer, the capsaicin content is 17.78~18.12 mg/100g, which is an increase of 1.23%~ 3.18%; after being treated with this special slow-control/release compound fertilizer, the nitrate content in pepper fruit was 229.8-256.9 mg/kg, which was 19.6%-33.7% lower than that of the control. The fruit peel is bright and clean, the coloring is even, and the fruit shape is plump. The utilization rate of nitrogen fertilizer was 63.4%~76.2%, and the fertilizer effect time reached more than 70 days. The residual nitrate and nitrite in the soil were 29.7~37.2 mg/kg and 0.16~0.29 mg/kg, respectively.

Example 5

A pepper slow-control/release compound fertilizer, comprising 25% urea, 18% monoammonium phosphate, 36% potassium sulfate, 0.7% magnesium sulfate, 0.016% boric acid, 0.044% zinc sulfate, and rapeseed meal in weight percent 10.5%, chicken manure 6.84%, bentonite 2.5%, hydroquinone 0.12%, dicyandiamide 0.28% are raw materials, prepared by the preparation method of Example 1.

The yield of peppers applied with special slow-control/release compound fertilizers was 2929.2~3137.4 kg/667m ² , an increase of 15.14%~23.33%; the vitamin C content of peppers applied with special slow-control/release compound fertilizers was 34.47~39.42 mg/100g, Increased by 8.41%~24.0%; the amino acid content of peppers using special slow-control/release compound fertilizers was 976.0~1165.4 mg/100g, an increase of 5.12%~25.50%; the reduction of peppers using special slow-control/release compound fertilizers The sugar content is 0.380%~0.412%, an increase of 5.89%~14.65%; after using this special slow-control/release compound fertilizer, the capsaicin content is 17.95~18.49 mg/100g, an increase of 2.21%~5.30% compared with the control ; After being treated with this special slow-control/release compound fertilizer, the nitrate content in pepper fruit was 225.2-256.8 mg/kg, which was 17.22%-33.59% lower than that of the control. The fruit peel is bright and clean, the coloring is even, and the fruit shape is plump. The utilization rate of nitrogen fertilizer was 59.9%~74.5%, the fertilizer effect time reached more than 70 days, and the residual nitrate and nitrite in the soil were 32.2~40.9 mg/kg and 0.17~0.31 mg/kg, respectively.

Example 6

A slow-control/release compound fertilizer for peppers, comprising 25% urea, 19% ammonium phosphate, 36% potassium sulfate, 0.8% magnesium sulfate, 0.018% boric acid, 0.045% zinc sulfate, and 8.117% rapeseed meal in weight percent %, chicken manure 8%, bentonite 2.6%, n-butyl triamine thiophosphate 0.14%, dicyandiamide 0.28% as raw materials, prepared by the preparation method of Example 1.

The yield of peppers applied with special slow-control/release compound fertilizers was 2977.3~3112.0 kg/667m ² , an increase of 13.10%~22.34%; the vitamin C content of peppers applied with special slow-control/release compound fertilizers was 34.16~36.28mg/100g, Increased by 7.43%~14.11%; the amino acid content of peppers using special slow-control/release compound fertilizers was 973.2~1083.6 mg/100g, an increase of 4.81%~16.71%; the reduction of peppers using special slow-control/release compound fertilizers The sugar content is 0.373%~0.394%, an increase of 3.79%~9.64%; after using this special slow-control/release compound fertilizer, the capsaicin content is 17.88~18.45 mg/100g, an increase of 1.82%~5.07% compared with the control ; After being treated with this special slow-control/release compound fertilizer, the nitrate content in the pepper fruit was 236.5-256.4 mg/kg, which was 23.1%-33.5% lower than that of the control. The fruit peel is bright and clean, the coloring is even, and the fruit shape is plump. The utilization rate of nitrogen fertilizer was 61.3%~70.1%, the fertilizer effect time reached more than 70 days, and the residual nitrate and nitrite in the soil were 29.8~40.5 mg/kg and 0.21~0.30 mg/kg respectively.

The fertilizer of contrast of the present invention is conventional capsicum compound fertilizer.

Claims (6)

1. A special fertilizer for capsicum, characterized in that it is composed of the following components: n-butyl triamine thiophosphate or hydroquinone 0.10% to 0.15%, dicyandiamide 0.25% to 0.30%, urea 24% to 28%, Monoammonium phosphate 18%~20%, potassium sulfate 35%~38%, magnesium sulfate 0.5%~1.0%, boric acid 0.015%~0.020%, zinc sulfate 0.03~0.05%, rapeseed meal 8%~12%, chicken manure 5% to 8%, bentonite 2% to 3%, calculated by mass percentage. 2. capsicum special fertilizer as claimed in claim 1, nBPT purity ≥ 97.0%, HQ purity ≥ 99%, DCD purity ≥ 99.5%. 3. The special fertilizer for capsicum as claimed in claim 1, urea 25%, monoammonium phosphate 18%, potassium sulfate 36%, magnesium sulfate 0.7%, boric acid 0.016%, zinc sulfate 0.044%, rapeseed meal 10.5%, chicken manure 6.84%. 4. The special fertilizer for capsicum as claimed in claim 1, 2 or 3, the urea adopts the urea containing N≥46% grade, and the monoammonium phosphate adopts the monophosphoric acid monophosphate containing _{N≥10% and P2O5≥40 %} grade. For ammonium and potassium sulfate, potassium sulfate containing K ₂ O ≥ 50% is used, magnesium sulfate is magnesium sulfate containing Mg ≥ 9.5%, zinc sulfate is zinc sulfate containing Zn ≥ 21%, and boric acid is boric acid containing B ≥ 17%. All are in weight percentage. 5. The special fertilizer for peppers as claimed in claim 1, 2 or 3, wherein rapeseed meal particles are ≤0.4 mm, chicken manure particles are ≤0.4 mm, and bentonite particles are ≤0.25 mm. 6. The special fertilizer for capsicum as claimed in claim 5, wherein the rapeseed meal particle size is 0.1-0.25 mm, the chicken manure particle size is 0.1-0.25 mm, and the bentonite particle size is 0.1 mm.