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Synthesis and application method of a foliar barrier agent for efficiently reducing cadmium accumulation in indica and japonica rice

A technology of application method and synthesis method, which is applied in the field of synthesis of foliar barrier agents, can solve problems such as difficult rice leaf absorption, and achieve the effects of enhancing detoxification ability, inhibiting migration and accumulation, and reducing cadmium pollution

Active Publication Date: 2022-06-07
HUAINAN NORMAL UNIV
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AI Technical Summary

Problems solved by technology

Silicon and zinc play an important role in reducing the accumulation of cadmium in rice, but the mixture of silicate and zinc salt is easy to form precipitation, which is not easy to be absorbed by rice leaves

Method used

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  • Synthesis and application method of a foliar barrier agent for efficiently reducing cadmium accumulation in indica and japonica rice
  • Synthesis and application method of a foliar barrier agent for efficiently reducing cadmium accumulation in indica and japonica rice

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preparation example Construction

[0029] refer to Figure 1-2 , a kind of synthetic method of the foliar blocker that effectively reduces the cadmium accumulation of indica and japonica rice, it is characterized by comprising the following steps:

[0030] Step 1: Synthesis of ethylenediaminetetraacetic acid iron sodium salt solution: Weigh 2.00g of ferrous sulfate tetrahydrate and 2.00g of disodium ethylenediaminetetraacetate, respectively, and dissolve them in 200ml of ddH 2 O and mix well.

[0031] Step 2: Add 3.00 g of zinc sulfate heptahydrate, and dissolve in a water bath at 60°C.

[0032] Step 3: Add 3.00 g of sodium metasilicate nonahydrate, and dissolve in a water bath at 60°C.

[0033] Step 4: Add 3.00 g of succinic acid, dissolve in a water bath at 60°C, and adjust the volume to 1000 ml.

[0034] A method for synthesizing and applying a foliar barrier agent for efficiently reducing the accumulation of cadmium in indica and japonica rice. The solution is diluted 20 times and sprayed 30 liters per m...

Embodiment 1

[0046] Example 1: The background value of cadmium in the experimental soil was 0.23 mg / kg, the pH value was 7.2, and the cation exchange capacity was 17.01±3.08 cmol / kg. The experimental groups are as follows:

[0047] (A) Soil without exogenous Cd + only sprayed with ddH 2 O;

[0048] (B) 3.0mg / kg Cd-contaminated soil + only ddH spray 2 O;

[0049] (C) 3.0mg / kg Cd-contaminated soil + spraying foliar fertilizer dilution (40×);

[0050] (D) 3.0mg / kg Cd-contaminated soil + spraying foliar fertilizer dilution (20×);

[0051](E) 3.0 mg / kg Cd-contaminated soil + spraying of foliar fertilizer dilution (10×). Each treatment group was sprayed with diluent from the end of jointing, once every 1 week, and continuously sprayed 3 times. Each treatment group was planted with 3 pots of indica rice (Longjingyou 570) and 3 pots of japonica rice (Nanjing 9108). The growing period is from mid-May 2019 to early October 2019, cultivated in the open air until the rice is mature. The cadmiu...

Embodiment 2

[0052] Example 2: The pH value of the paddy soil was 7.1, and the total cadmium content was 2.27±0.41 mg / kg. Four paddy fields with similar area were selected to carry out the following experiments:

[0053] Test area A: planting indica rice without spraying any reagents;

[0054] Test area B: planting indica rice, spraying diluted solution of cadmium foliar blocker (20×);

[0055] Test area C: planting japonica rice without spraying any reagents;

[0056] Test area D: planted japonica rice, sprayed with cadmium foliar blocker diluted solution (20×).

[0057] Each test area was sprayed with diluent from the end of jointing, once every 1 week, and continuously sprayed 3 times. The growing season is from late May 2020 to late October 2020. The cadmium content of brown rice was determined by ICP-MS, and the field experiment results were as follows: figure 2 shown. Compared with the unsprayed group of the same variety, the cadmium content in indica and japonica brown rice w...

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Abstract

The invention discloses a synthesis and application method of a foliar barrier agent for efficiently reducing cadmium accumulation in indica rice and japonica rice, comprising the following steps: Step 1: Synthesis of iron sodium salt solution of ethylenediaminetetraacetate: weighing 2.00 g of sulfuric acid tetrahydrate Ferrous and 2.00g disodium edetate were dissolved in 200ml ddHO 2 O, mix well. Step 2: Add 3.00 g of zinc sulfate heptahydrate, and dissolve in a water bath at 60°C. Step 3: Add 3.00 g of sodium metasilicate nonahydrate, and dissolve in a 60°C water bath. Step 4: Add 3.00g of succinic acid, dissolve in a water bath at 60°C and adjust the volume to 1000ml. After the solution is diluted 20 times, 30 liters are sprayed per mu of rice. The present invention sprays the diluted solution of "zinc-iron-EDTA-silicon-succinic acid" complex on rice stems and leaves at the end of jointing of rice, which can enhance the detoxification ability of rice itself and inhibit the migration and accumulation of cadmium from stems and leaves to grains. Reduce rice cadmium pollution.

Description

technical field [0001] The invention relates to the technical field of prevention and control of cadmium pollution in indica and japonica rice, in particular to a method for synthesizing and applying a foliar barrier agent for efficiently reducing cadmium content in indica and japonica rice grains. Background technique [0002] Rice has a strong ability to absorb and accumulate cadmium, resulting in the cadmium content in rice exceeding the standard easily, and its health hazard has caused widespread concern in the whole society. Therefore, actively exploring the methods and principles of preventing and controlling cadmium pollution in rice has important social, economic and environmental benefits. In recent years, the use of foliar physiological barrier agents to control the migration and accumulation of toxic metals or metalloids to crops and food chains has become a new direction of research on the prevention and control of heavy metal pollution in farmland in China. Fol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01N59/00A01N37/44A01N37/04A01G22/22A01P21/00
CPCA01N59/16A01N59/00A01N37/44A01N37/04A01G22/22
Inventor 汪承润储昭霞盖停停缪国鹏
Owner HUAINAN NORMAL UNIV
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