Soil remediation fertilizer and preparation method thereof

A soil repair and fertilizer technology, applied in the direction of organic fertilizer, inorganic fertilizer, ammonium salt fertilizer, etc., can solve the problems of endangering human health and life safety, crop production quality, decline, etc.
CN112919971APending Publication Date: 2021-06-08GUANGXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI UNIV
Publication Date
2021-06-08

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Abstract

The invention discloses a soil remediation fertilizer and a preparation method thereof. The soil remediation fertilizer is prepared from the following raw materials in parts by weight: 25-32 parts of modified phosphogypsum, 18-25 parts of urea, 12-18 parts of modified porous ceramsite, 6-11 parts of diatomite, 4-8 parts of plant ash, 3-7 parts of ammonium dihydrogen phosphate, 3-5 parts of fly ash, 2.5-3.5 parts of titanium dioxide, 1.8-3 parts of calcium polysulfide, 1-2 parts of ammonium chloride, 1-1.5 parts of chitosan, 0.2-0.6 part of sodium carboxymethyl cellulose and 0.1-0.5 part of fulvic acid. The soil remediation fertilizer disclosed by the invention can be used for effectively remediating farmlands polluted by organic phosphorus and heavy metals while giving nutrients to the farmlands; by adding the modified ardealite and the modified porous ceramsite, the remediation on farmland polluted by organic phosphorus and heavy metals is remarkably improved, the modified ardealite is acidic, the modified porous ceramsite is alkaline, and the modified ardealite and the modified porous ceramsite have a remarkable synergistic interaction effect.
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Description

technical field

[0001] The invention relates to the technical field of fertilizers, in particular to a soil repair fertilizer and a preparation method thereof. Background technique

[0002] Phosphogypsum is a by-product of the wet-process phosphoric acid production process. Every 1 ton of phosphoric acid (calculated as P2O5) produces 4-5 tons of phosphogypsum. The color of phosphogypsum is off-white or gray-black, and its main component is CaSO 4 2H 2 O, its content is higher than that of natural gypsum, but because it contains many harmful impurities such as soluble phosphorus, eutectic phosphorus, soluble fluorine and organic matter, phosphogypsum cannot be directly used.

[0003] Phosphogypsum contains phosphorus, calcium, magnesium, iron, silicon, sulfur and other nutrients needed for crop growth, provides surplus available phosphorus and available calcium and nutrients necessary for crop growth, improves the growth environment of crops, and increases the yield of crops...

Claims

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