Oil coated slow-release rice fertilizer capable of reducing heavy metal content of rice and preparation method thereof

A coating slow-release, heavy metal technology, applied in the preparation of organic fertilizers, layered/coated fertilizers, fertilizers made of biological waste, etc., to achieve the effect of promoting production and reducing heavy metal content

Inactive Publication Date: 2016-12-07
当涂县南北圩农产品专业合作社联合社
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waste oil is easy to obtain, degradable in soil, non-polluting, and there are few reports on its application in the agricultural field

Method used

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Embodiment Construction

[0015] An oil-coated slow-release rice fertilizer for reducing heavy metal content in rice is made from the following raw materials in parts by weight (kg):

[0016] Waste oil 20, elemental iodine 0.05, talc 10, fish scale 100, urea 80, straw 10, tea leaves 8, orange husk 8, sawdust 10, chicken feathers 5, streptomycin residue 4, lotus root powder 4, actinolite powder 4, 0.4 800 mol / L sodium hydroxide solution, 5 glutaraldehyde, appropriate amount of concentrated ammonia water, 0.4 microbial powder, 18 bentonite, 7 bamboo charcoal powder.

[0017] The preparation method of the described grease-coated slow-release rice fertilizer for reducing heavy metal content in rice comprises the following steps:

[0018] (1) Add elemental iodine to the waste oil, heat it to 180°C under the protection of nitrogen, and then 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;

[0...

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Abstract

The invention discloses an oil coated slow-release rice fertilizer capable of reducing the heavy metal content of rice. The oil coated slow-release rice fertilizer is prepared from the following raw materials in parts by weight: 20 to 22 parts of waste oil, 0.05 to 0.06 part of iodine, 10 to 11 parts of talc, 100 to 110 parts of fish scale, 80 to 85 parts of urea, 10 to 11 parts of straw, 8 to 9 parts of tea leaves, 8 to 9 parts of fructus aurantii, 10 to 11 parts of sawdust, 5 to 6 parts of chicken feather, 4 to 5 parts of streptomycin dregs, 4 to 5 parts of lotus root starch, 4 to 5 parts of actinolite powder, 800 to 820 parts of a sodium hydroxide solution with a concentration of 0.4 mol/L, 5 to 6 parts of glutaraldehyde, a proper amount of concentrated ammonia water, 0.4 to 0.5 part of microbial powder, 18 to 20 parts of bentonite and 7 to 8 parts of bamboo charcoal powder. According to the invention, through modification, the waste oil can be cured at room temperature during coating; meanwhile, the fish scale is degummed by being soaked in the sodium hydroxide solution, and the generated hydroxyapatite has a porous structure and can be used as a carrier to adsorb urea in a pore channel; In addition, the heavy metal content of the rice is reduced.

Description

technical field [0001] The invention relates to the technical field of fertilizer processing, in particular to an oil-coated slow-release rice fertilizer with reduced heavy metal content in rice 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 solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05F17/00
CPCC05F1/002C05F17/00C05G3/00C05G5/30C05F1/005C05F5/002C05F5/008C05F11/00C05F11/08Y02W30/40
Inventor 高祥张元宝
Owner 当涂县南北圩农产品专业合作社联合社
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