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Planting method for foliar inhibition of cadmium accumulation on rice grains

A technology for rice grains and planting methods, applied in rice cultivation, fertilization methods, fertilizer mixtures, etc., can solve problems such as suppression, achieve the effects of reducing cadmium content, preventing non-point source pollution, and simple synthesis methods

Inactive Publication Date: 2019-06-18
HUAINAN NORMAL UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a planting method for suppressing the accumulation of cadmium in rice grains by leaves, so as to solve the technical problems of planting rice with food safety standards, selenium-enriched and increased yield in the cadmium-contaminated paddy field proposed in the above-mentioned background technology

Method used

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  • Planting method for foliar inhibition of cadmium accumulation on rice grains
  • Planting method for foliar inhibition of cadmium accumulation on rice grains
  • Planting method for foliar inhibition of cadmium accumulation on rice grains

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Test background: 3.0mg / kg exogenous cadmium polluted soil

[0038]Pot experiment: the pH value of the experimental soil was 7.6, the background value of soil Cd was 0.26mg / kg, and the cation exchange capacity was 18.15±1.07cmol / kg. The following treatment groups were set up: 3.0mg / kg Cd contaminated soil + spraying deionized water, 3.0mg / kg Cd contaminated soil + spraying selenium-silicon composite sol dilution (20×), 3.0mg / kg Cd contaminated soil + spraying Selenium-silicon composite sol dilution (10×), 3.0mg / kg Cd contaminated soil + spraying selenium-silicon composite sol dilution (5×), 3.0mg / kg Cd contaminated soil + spraying selenium nano-sol dilution (10× ), 3.0mg / kg Cd contaminated soil + spraying silicon nano-sol diluent (10×). Three pots of rice were planted in each treatment group. Two weeks before the rice booting, the diluted solution was sprayed twice on the leaves with an interval of 6-7 days. Mature rice was collected, the content of cadmium in brown r...

Embodiment 2

[0041] Experimental Background: Cadmium Contaminated Paddy Fields

[0042] Field experiment: The farmland around XX thermal power plant was selected as the test field, the soil pH value was 7.2, the total soil cadmium content was 2.73±0.49mg / kg, and the cation exchange capacity was 16.53±3.02cmol / kg. Divide 40 mu of polluted paddy fields into 4 parts on average: positive control group (without spraying nano-sol), spraying selenium-silicon composite sol 10× dilution, spraying selenium nano-sol 10× dilution, spraying silicon nano-sol 10× Diluent. The same variety (Liangyou 688) was planted in each treatment group, and the above dilution was sprayed 2 weeks before booting, and sprayed twice with an interval of 7 days. Mature seeds were randomly collected to detect the content of cadmium and selenium in brown rice.

[0043] The results showed that, compared with the positive control group, spraying the above three dilutions reduced the cadmium content of brown rice by 41.6%, 23....

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Abstract

The invention discloses a planting method for foliar inhibition of cadmium accumulation on rice grains. After a prepared selenium (Se) silicon (Si) composite sol is diluted, the sol is uniformly sprayed on the leaf surface 2 weeks before the booting of rice, which can significantly reduce the cadmium content in rice, and the method is suitable for preventing and controlling the non-point source pollution of cadmium in rice fields. In terms of reducing the effect of rice cadmium pollution, foliar application of the composite sol diluent is significantly better than spraying of an original SiO2NPs or Se NPs sol diluent, and the method can also significantly increase the organic selenium content of the rice, and can be used for selenium-enriched rice development.

Description

technical field [0001] The invention belongs to the field of selenium-enriched and cadmium-repelling planting methods for rice, and specifically relates to a planting method for suppressing cadmium accumulation in rice grains on leaves, using Se NPs sol and SiO 2 Preparation of Quantum Dot Size SiO by NPs 2 The composite sol of microparticles and nano-selenium, 2 weeks before rice booting, spraying the dilution of this composite sol on the foliage can significantly reduce the content of cadmium in rice, and its effect is significantly better than that of spraying original SiO 2 NPs or Se NPs application solution can also significantly increase the organic selenium content of rice. This method can provide a convenient and efficient technology for the prevention and control of cadmium non-point source pollution in rice fields, the reduction of cadmium pollution in rice, and the production of selenium-enriched rice. Background technique [0002] There are usually two ways to ...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01C21/00C05G3/00
Inventor 汪承润汪顺祺郭春凤张传武刘天骄
Owner HUAINAN NORMAL UNIV
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