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Synthesis of leaf surface blocking agent for efficiently reducing cadmium accumulation of indica rice and japonica rice and application method thereof

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, reducing cadmium pollution, and inhibiting migration and accumulation

Active Publication Date: 2021-08-13
HUAINAN NORMAL UNIV
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  • Description
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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 of leaf surface blocking agent for efficiently reducing cadmium accumulation of indica rice and japonica rice and application method thereof
  • Synthesis of leaf surface blocking agent for efficiently reducing cadmium accumulation of indica rice and japonica rice and application method thereof

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preparation example Construction

[0029] refer to Figure 1-2 , a synthetic method for efficiently reducing cadmium accumulation in indica rice and japonica rice, characterized in that it comprises the following steps:

[0030] Step 1: Synthesis of iron sodium salt solution of EDTA: Weigh 2.00g of ferrous sulfate tetrahydrate and 2.00g of disodium EDTA, 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 60°C water bath.

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

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

[0035] Synthesis and application of a highly effective foliar barrier to reduce ...

Embodiment 1

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

[0047] (A) No exogenous Cd added to the soil + ddH sprayed only 2 O;

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

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

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

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

Embodiment 2

[0052] Example 2: The pH value of the paddy field soil is 7.1, and the total cadmium content is 2.27±0.41 mg / kg. Select 4 paddy fields with similar area to carry out the following experiments:

[0053] Experimental area A: Indica rice was planted, and no reagent was sprayed;

[0054] Experimental area B: Indica rice was planted, and a diluted solution of cadmium foliar barrier (20×) was sprayed;

[0055] Experimental area C: Plant japonica rice without spraying any reagents;

[0056] Experimental area D: Japonica rice was planted, and a diluted cadmium foliar barrier solution (20×) was sprayed.

[0057] Each test area was sprayed with diluent from the end of jointing stage, sprayed once every week, and sprayed continuously for 3 times. The growing period is from late May 2020 to late October 2020. ICP-MS was used to determine the cadmium content in brown rice, and the results of the field experiment were as follows: figure 2 shown. Compared with the non-sprayed group of...

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Abstract

The invention discloses a synthesis of a leaf surface blocking agent capable of efficiently reducing cadmium accumulation of indica rice and japonica rice and an application method thereof, the synthesis comprises the following steps: step 1, synthesis of an ethylenediaminetetraacetic acid ferric sodium salt solution: weighing 2.00 g of ferrous sulfate tetrahydrate and 2.00 g of ethylenediaminetetraacetic acid disodium salt, respectively dissolving in 200ml of ddH2O, and uniformly mixing; step 2, adding 3.00 g of zinc sulfate heptahydrate, and adopting a water bath at 60 DEG C for dissolution enhancement; step 3, adding 3.00 g of sodium metasilicate nonahydrate, and adopting a water bath at 60 DEG C for dissolution enhancement; and step 4, adding 3.00 g of succinic acid, adopting a water bath at 60 DEG C for dissolution enhancement, and bringing to volume to 1000 ml. After the solution is diluted by 20 times, 30 liters of the solution is sprayed per mu of rice. According to the method, the diluted solution of a zinc-iron-EDTA-silicon-succinic acid complex is sprayed to the stems and leaves of the rice at the final jointing stage of the rice, the detoxification capacity of the rice can be enhanced, migration and accumulation of cadmium from the stems and leaves to grains are inhibited, and cadmium pollution of the rice is reduced.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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