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Method for adopting red mud for lowering content of cadmium in rice

A technology of heavy metals and red mud, applied in the direction of soil preparation methods, botanical equipment and methods, applications, etc., can solve environmental pollution, reduce heavy metal cadmium content, reduce and other problems, and achieve the effect of reducing cadmium content and solving pollution

Inactive Publication Date: 2017-06-09
HUNAN ANBANG NEW AGRI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the invention is to reduce the absorption of heavy metal cadmium by rice crops, reduce the content of heavy metal cadmium in rice, and at the same time solve the increasingly serious environmental pollution problem caused by red mud

Method used

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  • Method for adopting red mud for lowering content of cadmium in rice

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Experimental program
Comparison scheme
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Embodiment 1

[0017] This embodiment provides a method for using red mud to reduce the heavy metal cadmium content in rice. Before rice transplanting, lime the rice field to keep the water depth of 1.2cm in the rice field; after 8 days, red soil in the rice field Mud, keep the water in the rice field at a depth of 3cm; transplant seedlings after 9 days. The cadmium content in the soil is solidified by lime and red mud, and further by inhibiting the accumulation of cadmium in the rice, the cadmium absorbed by the rice is transferred to the rice ear as little as possible when the rice is set, which can make the cadmium in the rice. The content is reduced.

[0018] The specific test steps of this embodiment are as follows:

[0019] The experiments were carried out in Hengyang County, Hunan Province. Through the experiment of setting up different treatment plots in a certain farmland, the Cd concentration in rice was investigated, and the preliminary scientific basis and technical support were prov...

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Abstract

The invention discloses a method for adopting red mud for lowering the content of cadmium in rice. The method comprises the steps that before rice transplanting is performed, lime is sprayed in the rice, and the water depth in the rice is kept to be -1.5 cm; after 5-10 days, red mud is sprayed in the rice, and the water depth in the rice is kept to be 2.5-4 cm; rice seedlings are transplanted after 5-15 days. The cadmium content in soil can be solidified through the lime and the red mud, and therefore the content of cadmium in the rice is lowered by restraining enrichment of cadmium in rice.

Description

Technical field [0001] The invention belongs to the field of rice planting, and in particular relates to a method for reducing the content of heavy metal cadmium in rice by using red mud. Background technique [0002] Applying lime to paddy fields can increase soil pH, reduce soil Cd content, and achieve the effect of inactivating Cd in the soil. There are two main reasons for this: one is that the application of lime increases the negative charge on the surface of the soil colloid and increases the adsorption capacity of heavy metal ions; on the other hand, the increase of soil pH can make the Fe and Mn plasmas in the soil form hydroxyl compounds, providing more The heavy metal adsorption sites make it difficult for Cd in the soil to be absorbed by crops. [0003] According to investigations, cadmium has strong mobility and concealment for plant absorption. "Cadmium is a silver-white shiny heavy metal with strong toxicity. It can be latent in the human body for up to 10-30 years....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01B79/02A01G22/22
CPCA01B79/02A01G22/22
Inventor 刘安辉
Owner HUNAN ANBANG NEW AGRI SCI & TECH