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Controlled-release compound fertilizer and preparation method thereof

A technology of compound fertilizers and controlled-release fertilizers, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as changing soil aggregate structure, nutrient structure and micro-ecological environment balance, reducing fertilizer nutrient content, and affecting the quality of agricultural products. Achieve the effect of realizing the recycling of agricultural resources, reducing agricultural costs, and preventing crop pests and bacterial diseases

Inactive Publication Date: 2015-08-05
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Slow and controlled-release fertilizers can reduce the loss of chemical fertilizer nutrients, improve the utilization rate of chemical fertilizer nutrients, solve the problem of a large amount of nitrate accumulation in the soil and agricultural products caused by large-scale application of nitrogen fertilizers, and affect the quality of agricultural products, and can coordinate the nutrient supply during the crop growth cycle, reduce Fertilization frequency and intensity, etc., but the current coated slow-release fertilizers have the following defects:
[0005] 1. The coating material is not a fertilizer nutrient. Its use not only reduces the nutrient content of the fertilizer, but also changes the soil aggregate structure, nutrient structure and micro-ecological environment balance after long-term use; Nitrogen deficiency

Method used

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  • Controlled-release compound fertilizer and preparation method thereof
  • Controlled-release compound fertilizer and preparation method thereof
  • Controlled-release compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of slow and controlled release compound fertilizer, is made up of the raw material of following percentage by weight:

[0050] Quick-acting nitrogen fertilizer ammonium bicarbonate 10%, coated slow-release fertilizer 90%.

[0051] The coated slow-release fertilizer is composed of an inner layer compound fertilizer and an outer layer coating material; the weight ratio of the inner layer compound fertilizer to the outer layer coating material is 1:0.2; the inner layer compound fertilizer is composed of the following weight percentages: Made of raw materials: 40% urea with 46.6% nitrogen content, 12% monoammonium phosphate, 30% potassium chloride, 8% compound micro-fertilizer, 5% Chinese herbal medicine residue, 5% potassium persulfate compound salt; The layer coating material is made of the following raw materials by weight: 20% of lignin, 15% of humic acid, 15% of dicyandiamide, 5% of modified high surface active mineral powder, 5% of binder, and the balance is wa...

Embodiment 2

[0081] A kind of slow and controlled release compound fertilizer, is made up of the raw material of following percentage by weight:

[0082] Quick-acting nitrogen fertilizer ammonium sulfate 20%, coated slow-release fertilizer 80%.

[0083] The coated slow-release fertilizer is composed of an inner layer compound fertilizer and an outer layer coating material; the weight ratio of the inner layer compound fertilizer to the outer layer coating material is 1:0.2; the inner layer compound fertilizer is composed of the following weight percentages: Made of raw materials: 40% urea with 46.6% nitrogen, 12% calcium phosphate, 30% potassium sulfate, 8% compound micro-fertilizer, 5% Chinese herbal medicine residue, 5% potassium persulfate compound salt; outer coating material Made from the following raw materials in parts by weight:

[0084] 30% lignin, 20% humic acid, 20% dicyandiamide, 8% modified high surface active mineral powder, 10% binder, and the balance is water;

[0085] The...

Embodiment 3

[0097] A kind of slow and controlled release compound fertilizer, is made up of the raw material of following percentage by weight:

[0098] Quick-acting nitrogen fertilizer ammonium nitrate 15%, coated slow-release fertilizer 85%.

[0099] The coated slow-release fertilizer is composed of an inner layer compound fertilizer and an outer layer coating material; the weight ratio of the inner layer compound fertilizer to the outer layer coating material is 1:0.2; the inner layer compound fertilizer is composed of the following weight percentages: Made of raw materials: 40% urea with 46.6% nitrogen, 12% monoammonium phosphate, 30% potassium chloride, 8% compound micro-fertilizer, 5% Chinese herbal medicine residue, 5% potassium persulfate compound salt; The membrane material is made of the following raw materials by weight: 25% lignin, 18% humic acid, 16% dicyandiamide, 6% modified high surface active mineral powder, 8% adhesive, and the balance is water;

[0100]The compound mic...

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Abstract

The invention discloses a controlled-release compound fertilizer and a preparation method thereof and belongs to the technical field of fertilizer. The controlled-release compound fertilizer comprises quick-acting nitrogen fertilizer and film type controlled-release fertilizer. The film type controlled-release fertilizer comprises interior compound fertilizer and outer film materials. The interior compound fertilizer is prepared by nitrogen fertilizer, phosphate fertilizer, potassic fertilizer, compound micro-fertilizer, Chinese herbal medicine and potassium monopersulfate. The outer film materials comprise lignin, humic acid, dicyandiamide, modified high-surface-activity mineral powder, binder and the balance of water. The compound fertilizer can control release speed of nutrients and has remarkable release effect. The film materials are fertilizer nutrients, and secondary pollution cannot be caused when the compound fertilizer is applied into the soil. In addition, husks and straws of crops are utilized, agricultural cost is reduced, Chinese herbal medicine and potassium monopersulfate are added and crop diseases and pests can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and relates to a high-efficiency slow-release and controlled-release compound fertilizer and a preparation method thereof. Background technique [0002] Chemical fertilizers are widely used in agricultural production in my country, effectively increasing the yield of crops and making important contributions to the rapid development of agriculture. However, the utilization rate of chemical fertilizers is not high, and the nutrient loss of chemical fertilizers is serious. According to statistics, the average utilization rate of effective nutrients in chemical fertilizers is only 30-35%, and the fertilizer effect period is short. The reason is that the low nutrient utilization efficiency of chemical fertilizers is not only affected by soil type, climate environment, crop varieties, and planting techniques, but also by many factors such as the type of fertilizer, the quality of fertilizer, and t...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G3/02C05G3/04C05G3/60C05G3/80C05G3/90
Inventor 仲子文李彦张文君薄录吉张英鹏
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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