A kind of crop cadmium-reducing selenium-enriching organic fertilizer and its preparation method and application

An organic fertilizer and selenium-enriched technology, applied in the field of agricultural production, can solve the problems of long period of phytoremediation, difficult to apply in a large area, poor cadmium stability, etc., and achieve the effects of inhibiting absorption, increasing the content of organic matter, and reducing the effect of cadmium.

Active Publication Date: 2020-09-01
CHANGSHA HAORUI BIOLOGICAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The second is to use the physical adsorption capacity of active adsorption materials to fix cadmium in water, such as activated carbon, but these materials are expensive and difficult to apply in large areas. At the same time, physical adsorption is a relatively weak force. relatively poor sex
The third is phytoremediation, which eliminates cadmium pollution in soil through the special ability of some plants to accumulate cadmium, but such plants are not suitable for planting in all soils, and the period of phytoremediation is very long

Method used

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  • A kind of crop cadmium-reducing selenium-enriching organic fertilizer and its preparation method and application
  • A kind of crop cadmium-reducing selenium-enriching organic fertilizer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In the fermentation tank, the plant residue composed of camellia seed meal, oil waste clay, camellia seed shell and tea residue is mixed uniformly in a weight ratio of 50:8:20 to prepare a mixture, and the mixture is sprayed with a content of 5 grams of sodium selenite / kg of aqueous solution, after stirring evenly, the water content of the mixture is measured to be 55%; the mixture is stacked into a stack of 1.5-2 meters high and 2-3 meters wide for composting and fermentation, when the temperature rises to 60-65 ° C Turn over the pile for the first time with throwing equipment; when the temperature of the turned mixture drops to room temperature, it is piled up again, and when the temperature rises to 60-65°C, it is turned over again, and at the same time, the sodium selenite aqueous solution is sprayed to ensure the content of the mixture. The water content is 50-60%. After repeating this for 6 times, the temperature of the pile body will drop to room temperature and...

Embodiment 2

[0042]In the fermentation tank, the plant residues composed of Camellia oleifera seed meal, waste oil clay, Camellia oleifera and Camellia oleifera flower are mixed uniformly in a weight ratio of 48:7:18 to prepare a mixture, and the mixture is sprayed with a sodium selenite content of 8 g / Kilograms of aqueous solution, after stirring evenly, the water content of the mixture is measured to be 58%; the mixture is stacked into 1.5-2 meters high and 2-3 meters wide for composting and fermentation, when the temperature rises to 60-65 ° C Use turning and throwing equipment for the first turning treatment; after the temperature of the turned mixture drops to room temperature, stack it again, and turn it again when the temperature rises to 60-65°C, and spray sodium selenite aqueous solution at the same time to ensure the water content of the mixture At 50-60%, after repeating this for 7 times, the temperature of the heap drops to room temperature and does not rise any more, and the f...

Embodiment 3

[0044] In the fermentation tank, the plant residue composed of camellia seed meal, waste white clay for oil, tea tree and tea residue is mixed uniformly at a weight ratio of 55:8:25 to prepare a mixture, and the mixture is sprayed with a sodium selenite content of 6 g / Kilograms of aqueous solution, after stirring evenly, the water content of the mixture is measured at 60%; the mixture is stacked into a stack of 1.5-2 meters high and 2-3 meters wide for composting and fermentation, when the temperature rises to 60-65 ° C Use turning and throwing equipment for the first turning treatment; after the temperature of the turned mixture drops to room temperature, stack it again, and turn it again when the temperature rises to 60-65°C, and spray sodium selenite aqueous solution at the same time to ensure the water content of the mixture At 50-60%, after repeating this for 10 times, the temperature of the stack drops to room temperature and no longer rises, and the fermentation process...

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Abstract

The invention relates to the technical field of agricultural production, and in particular relates to a cadmium-reducing selenium-enriched organic fertilizer applied to treatment and remediation of heavy metal pollution of soil and a preparation method thereof. According to the invention, a way that chemical adsorption of tea polyphenol and functional groups of humic acid, which are contained in camellia seed meal and theaceae plant residual bodies on cadmium and physical adsorption of oil waste clay and medical stone on cadmium are combined is uniquely adopted for greatly lowering the content of available cadmium in soil, and a selenium-containing compound and especially a means that selenized protein can form a cadmium-selenium-protein complex are adopted, so that an obvious cadmium reducing effect is achieved; and absorption of plants on cadmium is inhibited by utilizing the characteristic that selenium has a competitive antagonistic effect on cadmium and providing a large amount of selenium elements, and migration and enrichment of a cadmium element towards plants are stopped. The organic fertilizer provided by the invention has the advantages that raw materials are available, the cost is low, production processing wastes are utilized and changed into things of value, and the preparation method is simple, environment-friendly and easy to realize industrialized large-scale production.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a cadmium-reducing selenium-rich organic fertilizer and a preparation method thereof, which are applied to control and repair soil heavy metal pollution. Background technique [0002] Soil pollution is called "invisible pollution" and the pollution with the longest incubation time. At present, soil pollution in my country is becoming more and more serious. Cultivated land, urban soil, soil around industrial bases, and industrial and mining area soil are all polluted to varying degrees, and the heavy metals in them are Pollution is particularly serious and has threatened the ecological environment, food safety and sustainable development of agriculture. Cadmium is one of the most biologically toxic elements in soil heavy metal pollution. It has strong chemical activity and long-lasting toxicity in soil, and it is easy to endanger human health through the enrichment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/50C05G3/60C05G3/80
CPCC05D1/00C05D9/00C05G3/00C05G3/80C05F5/002C05F11/00C05F17/00C05F9/04C05F11/02
Inventor 吴苏喜宋斌吴文昊
Owner CHANGSHA HAORUI BIOLOGICAL SCI & TECH
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