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Selenium enrichment and cadmium reduction rice planting method

A planting method and rice technology, applied in botany equipment and methods, fertilization methods, rice cultivation, etc., can solve the problems of high implementation cost, inappropriate application, and troublesome operation, so as to improve soil fertility, promote absorption and utilization, and benefit absorption effect

Active Publication Date: 2017-08-18
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the main method to increase the selenium content of rice is to apply selenium-containing fertilizers, but improper application of this method may increase the content of heavy metals in rice; methods to reduce cadmium in rice grains include the application of apatite and lime rice straw , silicon fertilizer, polyhydroxy amino acid chelating agent and other soil remediation agents, and appropriate agronomic measures, etc., but these methods have the disadvantages of troublesome operation and high implementation cost
In addition, in the existing rice planting methods, only a single goal of selenium enrichment or cadmium reduction is often considered, and both are often not considered.

Method used

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  • Selenium enrichment and cadmium reduction rice planting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for planting rice rich in selenium and reducing cadmium, comprising the steps of:

[0038] (1) field selection: select the paddy field with medium and low cadmium pollution with soil available selenium content of 0.29mg / kg and soil cadmium content of 0.89mg / kg;

[0039] (2) Seedling raising: the seeds are sun-dried for 24 hours 2 days in advance, and after the plump and non-mold seeds are screened out for disinfection, the seeds are soaked and accelerated in a sodium selenite solution with a mass concentration of 0.1%, until 90% of the seeds are white. Keep the seedling field soil moist during sowing and cultivating seedlings;

[0040] (3) Fertilization for soil preparation: Soak the paddy field continuously in water 15 days before transplanting the rice seedlings, plow and harrow the field 1 day before transplanting, trim the paddy field to prevent leakage of water and fertilizer, and apply 500kg / mu of organic fertilizer and 25kg / mu of compound fertilizer as b...

Embodiment 2

[0052] A method for planting rice rich in selenium and reducing cadmium, comprising the steps of:

[0053] (1) field selection: select paddy fields with moderate and low cadmium pollution with soil available selenium content of 0.5 mg / kg and soil cadmium content of 0.90 mg / kg;

[0054] (2) Seedling raising: sun-dry the seeds for 12 hours 1 day in advance, screen out plump and non-mold seeds for disinfection, soak and accelerate germination with a sodium selenite solution with a mass concentration of 0.05%, and sow after 92% of the seeds are white , maintaining seedling field soil during the cultivation of seedlings;

[0055] (3) Fertilization for soil preparation: 17 days before the rice seedlings are transplanted, the paddy field is continuously soaked in water, plowed and harrowed 2 days before the transplantation, the paddy field is repaired to prevent leakage of water and fertilizer, and 450kg / mu of organic fertilizer and 30kg / mu of compound fertilizer are applied. The or...

Embodiment 3

[0067] A method for planting rice rich in selenium and reducing cadmium, comprising the steps of:

[0068] (1) field selection: select the paddy fields with medium and low cadmium pollution with soil available selenium content of 0.15 mg / kg and soil cadmium content of 0.45 mg / kg;

[0069] (2) Seedling raising: sun-dry the seeds for 12 hours 1 day in advance, screen out plump and non-mold seeds for disinfection, soak and accelerate germination with a sodium selenite solution with a mass concentration of 0.08%, and sow after 92% of the seeds are white , keep the soil moist during the cultivation of seedlings;

[0070] (3) Fertilization for soil preparation: Soak the paddy field continuously in water 13 days before transplanting rice seedlings, plow and harrow the field 1 day before transplanting, trim the paddy field to prevent leakage of water and fertilizer, and apply 550kg / mu of organic fertilizer and 28kg / mu of compound fertilizer as base fertilizer , the organic fertilizer...

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Abstract

The invention discloses a selenium enrichment and cadmium reduction rice planting method, and belongs to the technical field of planting. The planting method includes the steps: field selection; rice seedling culture; site preparation and fertilization; transplantation; field management; rice harvesting and storage. Field management includes spraying selenium-containing leaf fertilizers to leaf surfaces, wherein the selenium-containing leaf fertilizers comprise sodium selenite, citric acid monohydrate, urea, potassium chloride and monopotassium phosphate. Particularly, the selenium-containing leaf fertilizers are sprayed to the leaf surfaces once or twice within specified time before rice breaks, selenium enrichment and cadmium reduction effects can be simultaneously achieved, and the method has the advantages of simplicity in implementation and remarkable effects.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of planting, in particular to a rice planting method enriched in selenium and reduced in cadmium. [0003] 【Background technique】 [0004] Selenium is one of the essential micronutrients for the human body. It is an essential component of the active site of the free radical scavenging enzyme glutathione peroxidase in the human body. It has the functions of scavenging peroxide, preventing cell damage, and delaying cell aging. Many studies have shown that selenium has an important relationship with anti-cancer and cardiovascular disease prevention. Selenium deficiency can cause various diseases in the human body, such as Keshan disease and Kaschin-Beck disease. There are 72% of counties and cities in China that have different degrees of deficiency. Selenium, and people in these areas often have insufficient selenium intake, and even in some soils with high selenium content, the selenium content in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01C1/00A01C21/00C05G3/00C05G3/04A01G22/22C05G3/80
CPCA01C1/00A01C21/005A01G22/22C05B7/00C05D1/00C05G3/00C05G3/80C05G5/20C05G5/30C05C9/00C05D1/02C05D9/02C05D9/00C05F11/00
Inventor 黄太庆江泽普梁潘霞邢颖廖青
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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