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Method for adopting silicon calcium phosphate fertilizer for lowering content of cadmium in rice

A heavy metal, silicon calcium technology, applied in fertilization methods, botanical equipment and methods, applications, etc., can solve the problems of difficult absorption of Cd, increase of negative charge on the surface of soil colloids, enhanced adsorption capacity of heavy metal ions, etc. Effect

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

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Problems solved by technology

There are two main reasons for this: first, the application of lime increases the negative charge on the surface of soil colloids, which enhances the adsorption capacity for heavy metal ions; heavy metal adsorption sites, making it difficult for Cd in the soil to be absorbed by crops

Method used

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  • Method for adopting silicon calcium phosphate fertilizer for lowering content of cadmium in rice

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The present embodiment provides a kind of method that reduces heavy metal cadmium content in rice with silicon-calcium-phosphate fertilizer, before rice transplanting, sprinkle lime in rice field earlier, keep the water depth 1.2cm in rice field; Wait for 8 days later, again in rice field Apply silicon-calcium-phosphate fertilizer for the first time to keep the water depth in the paddy field at 3 cm; transplant the seedlings after 11 days; In this embodiment, the cadmium content in the soil is stabilized by lime and silicon-calcium-phosphate fertilizer, and the enrichment of cadmium in rice is further suppressed by silicon-calcium-phosphate fertilizer, so that the cadmium absorbed by the rice is as little as possible in the rice ear when the rice is eared. Transfer can reduce the cadmium content in rice.

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

[0019] The experiments were carried out in Hengyang County, Hunan Province. Different trea...

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Abstract

The invention discloses a method for adopting a silicon calcium phosphate fertilizer 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, the silicon calcium phosphate fertilizer is applied in the rice for the first time, and the water depth in the rice is kept to be 2.5-4 cm; rice seedlings are transplanted after 5 days; after the rice grows to a heading period, the silicon calcium phosphate fertilizer is applied for the second time. The content of cadmium in soil is solidified through the lime and the silicon calcium phosphate fertilizer, enrichment of cadmium in the rice is restrained through the silicon calcium phosphate fertilizer, the cadmium absorbed by the rice is transplanted to rice ears as little as possible in the rice heading period, and the content of cadmium in rice can be lowered.

Description

technical field [0001] The invention relates to a method for reducing heavy metal cadmium content in rice by using silicon calcium phosphate fertilizer. Background technique [0002] Applying lime to paddy fields can increase soil pH, reduce soil extractable Cd content, and achieve the effect of passivating Cd in soil. There are two main reasons for this: first, the application of lime increases the negative charge on the surface of soil colloids, which enhances the adsorption capacity for heavy metal ions; heavy metal adsorption sites, making it difficult for Cd in the soil to be absorbed by crops. [0003] According to the survey, cadmium has strong mobility and concealment of plant absorption. "Cadmium is a silvery white shiny heavy metal with strong toxicity. It can be hidden in the human body for 10-30 years." By water or food, etc. Most of the cadmium poisoning caused is a chronic attack, which can cause irritation of the digestive tract mucosa, nausea, vomiting, dia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01C21/00A01G22/22
CPCA01C21/00A01G22/22
Inventor 刘安辉
Owner HUNAN ANBANG NEW AGRI SCI & TECH