Grease-coated controlled-release rice fertilizer capable of improving saline-alkali soil and preparation method of grease-coated controlled-release rice fertilizer

A film-coated slow-release, saline-alkali land technology, applied in ammonium salt fertilizers, layered/coated fertilizers, fertilizers made from biological waste, etc., to achieve the effect of improving saline-alkali land and improving slow-release effects

Inactive Publication Date: 2016-11-16
当涂县南北圩农产品专业合作社联合社
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Waste oil is easy to obtain, degradable in soil, non-polluting, and

Method used

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Embodiment Construction

[0015] An oil-coated slow-release rice fertilizer that can improve saline-alkali land is made of the following raw materials in parts by weight (kg):

[0016] Waste oil 20, elemental iodine 0.05, talc 10, fish scale 100, urea 80, biogas residue 15, peanut meal 12, hawthorn core 14, rice washing water 7, phosphate rock powder 4, maltooligosaccharide 2, potassium permanganate 1 , Phosphogypsum 3, 0.4mol / L sodium hydroxide solution 800, glutaraldehyde 5, strong ammonia water amount, microbial powder 0.4, bentonite 18.

[0017] The preparation method of the described grease-coated slow-release rice fertilizer capable of improving saline-alkali land comprises the following steps:

[0018] (1) Add elemental iodine to the waste oil, heat it to 180°C under the protection of nitrogen, and react at a constant temperature for 2.5 hours, continue to pass through nitrogen for protection and let it stand and cool to 22°C to obtain conjugated modified oil;

[0019] (2) Grinding talc into po...

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Abstract

The invention discloses a grease-coated controlled-release rice fertilizer capable of improving saline-alkali soil is prepared from the following raw materials in parts by weight: waste grease 20-22 parts, iodine 0.05-0.06 part, talcum 10-11 parts, fish scale 100-110 parts, urea 80-85 parts, biogas residues 15-16 parts, peanut meal 12-13 parts, Chinese hawthorn seeds14-15 parts, washing water of rice 7-8 parts, ground phosphate rock 4-5 parts, maltooligosaccharide 2-3 parts, potassium permanganate 1-1.2 parts, ardealite 3-4 parts, 0.4 mol/L sodium hydroxide solution 800-820 parts, glutaraldehyde 5-6 parts, a proper amount of strong ammonia water, microbial powder 0.4-0.5 part and bentonite 18-20 parts. The waste grease is modified so that the waste grease can be solidified at normal temperature during coating, and after the fish scale is soaked with sodium hydroxide and is degummed, produced hydroxyapatite has a porous structure and can be used as a carrier to adsorb the urea in ducts. In addition, the grease-coated controlled-release rice fertilizer can improve the saline-alkali soil.

Description

technical field [0001] The invention relates to the technical field of fertilizer processing, in particular to an oil-coated slow-release rice fertilizer capable of improving saline-alkali land and a preparation method thereof. Background technique [0002] Slow-release fertilizer is a type of fertilizer that releases fertilizer nutrients slower than conventional water-soluble fertilizers after the fertilizer is applied to the soil. Two categories. At present, the film material of coated slow-release fertilizer produced industrially is mainly composed of synthetic high polymer resin, and the fluidized bed spraying method is adopted, and the process is complicated. Although slow-release fertilizers have achieved great development worldwide, the commercial price is 3-8 times that of ordinary fertilizers, which greatly limits the popularization and application. Therefore, the development and utilization of new efficient and low-cost slow-release coating materials is a solution...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05C3/00C05G3/00C05G3/80C05C9/00C05D3/02C05D5/00C05D9/02C05F1/002C05F5/002C05F9/04C05F11/00C05F11/08C05G5/30
Inventor 高祥査海涅
Owner 当涂县南北圩农产品专业合作社联合社
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