Seed soaking agent for reducing cadmium content in wheat grains in cadmium contaminated soil and application thereof

Abstract

The application discloses a seed soaking agent for reducing cadmium content in wheat grains in cadmium contaminated soil and application thereof, and an effective component of the seed soaking agent is silver nitrate solution. The seed soaking agent is prepared by mixing silver nitrate in a scientific proportion, and the seed soaking agent is not only simple and easy to prepare, but also has a very low required concentration, and thus the raw material cost and use amount are significantly reduced. Through seed soaking treatment of the seed soaking agent on wheat seeds, absorption and transportation of cadmium in soil by the wheat can be effectively inhibited, and thus the cadmium content in the wheat grains is significantly reduced, and the quality safety of agricultural products is ensured. In addition, the use method of the seed soaking agent is simple and fast, and complicated equipment or high investment is not needed, and thus agricultural production cost is greatly reduced, and agricultural production efficiency is improved. Therefore, the application has wide application prospect and remarkable economic benefits in the aspects of reducing cadmium content in wheat grains, ensuring food safety and promoting sustainable development of agriculture.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of agricultural environmental protection technology, and particularly relates to a seed soaking agent for reducing cadmium content in wheat kernels and application thereof. BACKGROUND

[0002] Cadmium, as a highly toxic heavy metal element, has been classified as a Class I carcinogen, posing a serious threat to human health. Wheat, as one of the most important food crops in China, is widely cultivated in neutral and weakly alkaline soil environments. Compared with acidic soil, neutral and weakly alkaline soil has stronger adsorption and precipitation effects on cadmium, leading to the long-term accumulation of cadmium in the soil, which is difficult to degrade or remove naturally. Notably, wheat has a special physiological characteristic, i.e., it can efficiently absorb cadmium from the roots and transport it to the aboveground parts, especially the kernels, thereby increasing the risk of cadmium enrichment in wheat kernels.

[0003] Although some technical methods have been successfully applied to cadmium-resistant treatment of rice in acidic soil, these methods are not effective in addressing the cadmium enrichment problem of wheat in neutral and weakly alkaline soil conditions. These techniques not only have limited effectiveness, but also have complex implementation processes, requiring a large amount of manpower, material resources, and financial resources, resulting in high costs and making it difficult to promote and apply on a large scale.

[0004] Therefore, experts and scholars in the field of agricultural environment are facing an urgent task: how to effectively reduce the cadmium content in wheat kernels while exploring a new technology or method that is cost-controllable, easy to operate, and has the potential for large-scale promotion. This is not only crucial for ensuring food security and public health in China, but also an important part of promoting sustainable agricultural development and achieving the goal of green and ecological agriculture. SUMMARY

[0005] The technical problem solved by the present application is that the existing technology has poor effect, high cost, and is difficult to promote on a large scale in reducing the cadmium content in wheat kernels in neutral and weakly alkaline soil. The present application proposes a seed soaking agent for reducing the cadmium content in wheat kernels in cadmium-polluted soil and its application, aiming to effectively reduce the cadmium content in wheat kernels.

[0006] The technical solution is the application of silver nitrate in preparing a seed soaking agent for reducing the cadmium content in crop kernels in cadmium-polluted soil.

[0007] A seed soaking agent for reducing the cadmium content in crop kernels in cadmium-polluted soil, wherein the effective component of the seed soaking agent is a silver nitrate solution.

[0008] Preferably, the concentration of silver nitrate in the seed soaking agent is 0.17 mg / L-0.68 mg / L.

[0009] Further preferably, the concentration of silver nitrate in the seed soaking agent is 0.34 mg / L.

[0010] Preferably, the solute in the seed soaking agent is water.

[0011] A seed soaking method for reducing the cadmium content in wheat grains, which utilizes a seed soaking agent to soak wheat seeds, the wheat variety being Jima 336.

[0012] Preferably, the seed soaking time is 16 hours.

[0013] After the soaking of the wheat seeds is completed, the seeds are taken out and placed on an empty ground to dry naturally for 2 hours before sowing.

[0014] Beneficial effects: The seed soaking agent of the present application is prepared by mixing conventional medicaments in a scientific ratio, which is not only simple and easy to prepare, but also requires a very low concentration, significantly reducing the cost of raw materials and the amount used. By soaking the wheat seeds with the seed soaking agent, the absorption and transport of cadmium in the soil by wheat can be effectively inhibited, thereby significantly reducing the cadmium content in the wheat grains and ensuring the quality and safety of agricultural products. In addition, the use method of the seed soaking agent is simple and fast, without the need for complex equipment or high investment, greatly reducing the cost of agricultural production and improving the efficiency of agricultural production. Therefore, the present application has broad application prospects and significant economic benefits in reducing the cadmium content in wheat grains, ensuring food safety, and promoting sustainable agricultural development. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Effect of seed soaking concentration on wheat grain yield.

[0016] Figure 2 Effect of seed soaking concentration on cadmium content in wheat grains. DETAILED DESCRIPTION

[0017] The present application will be further described below in conjunction with the drawings and specific examples.

[0018] Example 1

[0019] A seed soaking method for reducing the cadmium content in wheat grains, which utilizes a seed soaking agent to soak wheat seeds, the wheat variety being Jima 336.

[0020] (1) Preparation of seed soaking agent

[0021] In this example, the effective ingredient of the seed soaking agent is silver nitrate. Silver nitrate is added to water and dissolved to obtain the seed soaking agent. In order to reflect the effects of seed soaking agents with different concentrations, three different ratios are set in this example:

[0022] Seed soaking agent Ag1: containing 0.17 mg / L of silver nitrate;

[0023] Seed soaking agent Ag2: containing 0.34mg / L silver nitrate;

[0024] Seed soaking agent Ag3: containing 0.68mg / L silver nitrate;

[0025] (2) Selecting wheat variety Jima 336, applying Ag1, Ag2, Ag3 concentration for seed soaking treatment, the specific method is as follows: two days before sowing, different plastic buckets are used for seed soaking treatment, different seed soaking agents (Ag1, Ag2, Ag3) are contained in different plastic buckets, and a control group (CK) of pure water soaking is set. After 16 hours of seed soaking, the seeds are taken out, placed in an empty field and naturally dried for 2 hours, and then sown. After sowing, the conventional field operation is adopted until harvesting. The test field is a cadmium contaminated farmland, and the soil cadmium content is 1.38mg / Kg. At the same time, another cadmium contaminated farmland is taken for potting test, and the soil cadmium content is 1.63mg / Kg.

[0026] The wheat grain yield in the field and potting test is as shown in Figure 1 The results show that the silver nitrate seed soaking does not reduce the yield of wheat.

[0027] The cadmium content in the wheat grain in different treatment groups is as shown in Figure 2 The results show that under the Ag1, Ag2, Ag3 three seed soaking concentrations, the cadmium content in the grain is reduced, and the purpose of reducing the cadmium accumulation in the grain is achieved. The field test shows that under the Ag2 seed soaking concentration, the cadmium content in the grain is significantly reduced by 25%; the potting test shows that under the Ag1 seed soaking concentration, the cadmium content in the grain is significantly reduced by 37%.

[0028] It can be seen that the seed soaking agent of the present application can effectively improve the growth condition of the cadmium contaminated wheat and reduce the accumulation of cadmium in the wheat.

[0029] Of course, those skilled in the art should know that the present application is applicable to the soil with cadmium content of 1.38mg / Kg and 1.63mg / Kg, and can also produce improvement effect on other soils, but the seed soaking wheat variety and seed soaking concentration need to be adjusted according to the actual situation.

[0030] Through the above description, the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims. It should be known that the seed soaking test is only for wheat variety Jima 336. At the same time, after seed soaking, the wheat is affected by many natural conditions in the field, and there are many uncontrollable factors. Based on the ideal embodiment of the present application, silver nitrate seed soaking agent can be used in the cadmium contaminated farmland of Jima 336, and the purpose of reducing the cadmium content in the wheat grain is achieved.

[0031] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Application of silver nitrate in the preparation of seed soaking agent for reducing the cadmium content in wheat grains in cadmium contaminated soil, the concentration of silver nitrate in the seed soaking agent is 0.17 mg / L - 0.68 mg / L.

2. Use according to claim 1, characterized in that, The concentration of silver nitrate in the seed soaking agent is 0.34 mg / L.

3. Use according to claim 1, characterized in that, The solvent in the seed soaking agent is water.

4. A seed soaking method for reducing cadmium content in wheat grains, characterized by, The wheat seeds are soaked with the seed soaking agent, the wheat variety is Jima 336, the effective component of the seed soaking agent is silver nitrate solution, and the concentration of silver nitrate in the seed soaking agent is 0.17 mg / L - 0.68 mg / L.

5. The seed soaking method according to claim 4, wherein The soaking time is 16 hours.

6. The seed soaking method according to claim 4, wherein After the wheat seeds are soaked, they are taken out and naturally dried on the ground for 2 hours before sowing.

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