Compound fertilizer capable of restoring soil and reducing crop cadmium absorption and application

A technology for repairing soil and compound fertilizer, which is applied in the field of fertilizers, can solve the problems of not being easy to reach the edible safety limit, low heavy metal Cd barrier rate, and low heavy metal Cd content, so as to achieve wide application range, improve fertilizer utilization rate, and reduce Cd content Effect

Active Publication Date: 2016-01-27
SHENZHEN BATIAN ECOTYPIC ENG +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0011] (1) Only applicable to situations where the content of heavy metal Cd in polluted soil is low (generally, the total content of Cd in soil is <0.6ppm);
[0012] (2) The nutrient content of nitrogen, phosphorus and potassium is low and can only be used in

Method used

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  • Compound fertilizer capable of restoring soil and reducing crop cadmium absorption and application
  • Compound fertilizer capable of restoring soil and reducing crop cadmium absorption and application
  • Compound fertilizer capable of restoring soil and reducing crop cadmium absorption and application

Examples

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preparation example Construction

[0043] The preparation method of the above-mentioned compound fertilizer is as follows: first, charcoal activated carbon and solid silicate are mixed according to the proportion of 6%-35% and 1%-3% respectively, then pulverized, and then sieved to obtain highly adsorbable activated carbon material and micron-sized silicic acid Salt material; then according to the following composition ratio: 15%-40% of nitrogen raw material, 5-10% of phosphorus raw material, 8-20% of potassium raw material, 15%-30% of calcium magnesium phosphate fertilizer, 2%-3% of bentonite, 1%-3% of potassium humate and 1%-2% of borax are mixed with the above-mentioned pulverized and sieved high-adsorption activated carbon material and micron silicate material, and the compound fertilizer is obtained after granulation.

[0044] In the above steps, the charcoal activated carbon and the solid silicate are pulverized by a pulverizer, and passed through a 400-500 mesh sieve to form a highly adsorbable activated ...

Embodiment

[0049] One, the present invention is to the barrier experiment of the heavy metal Cd in rice planting.

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Abstract

The present invention discloses a compound fertilizer capable of restoring soil and reducing crop cadmium absorption, and the compound fertilizer comprises the following raw materials by weight: 15% to 40% of a nitrogen raw material, 5-10% of a phosphorus raw material, 8-20% of a potassium raw material, 15%-30% of calcium magnesium phosphorus fertilizer, 6%-35% of charcoal activated carbon, 2%-3% of bentonite, 1%-3% of potassium humate, 1%-3% of solid silicate and 1%-2% of borax. The present invention also provides the application of the fertilizer in crops. Through combination of fertilizer preparations and absorbent materials, the compound fertilizer can absorb heavy metals, and also can absorb nutrients, protect fertilizer, restore soil and increase fertilizer use efficiency by 10%; after administration, the crop Cd content can be effectively reduced, and the reducing rate is about 30%-50%, heavy metal Cd adsorption fixing time period can be maintained at about 3-6 months, and the compound fertilizer has a wide use range, and is worthy of promoting.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a compound fertilizer capable of repairing soil and reducing the absorption of heavy metal cadmium by crops and the application of the compound fertilizer in crops. Background technique [0002] Soil remediation refers to the use of physical, chemical and biological methods to transfer, absorb, degrade and transform pollutants in the soil, reducing its concentration to an acceptable level, or converting toxic and harmful pollutants into harmless substances. Contaminated soil remediation generally includes: (1) changing the form of pollutants in the soil or combining with the soil, reducing their mobility and bioavailability in the environment; (2) reducing the concentration of harmful substances in the soil . As a country with a very high population density, nearly one-fifth of the existing cultivated land in China has been polluted to varying degrees, especially...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
Inventor 马骥韩冬芳
Owner SHENZHEN BATIAN ECOTYPIC ENG
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