Seed soaking agent for reducing cadmium content in wheat grains in cadmium-polluted soil and application of seed soaking agent

Abstract

The invention discloses a seed soaking agent for reducing cadmium content in wheat grains in cadmium-polluted soil and application thereof. The effective component of the seed soaking agent is a silver nitrate solution. The seed soaking agent is prepared by mixing silver nitrate according to a scientific ratio, the preparation process is simple and easy to implement, the required concentration is extremely low, and the raw material cost and the use amount are remarkably reduced. Wheat seeds are soaked by the seed soaking agent, and absorption and transfer of cadmium in soil by wheat can be effectively inhibited, so that the cadmium content in wheat grains is remarkably reduced, and the quality safety of agricultural products is guaranteed. Besides, the use method of the seed soaking agent is simple and quick, complex equipment or high investment is not needed, the agricultural production cost is greatly reduced, and the agricultural production efficiency is improved. Therefore, the method has wide application prospects and remarkable economic benefits in the aspects of reducing the cadmium content of the wheat grains, guaranteeing food safety, promoting agricultural sustainable development and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural environmental protection, and particularly relates to a seed soaking agent for reducing the cadmium content in wheat grains and application thereof. Background Art

[0002] Cadmium, as a highly toxic heavy metal element, has been classified as a Class I carcinogen and poses a serious threat to human health. Wheat, as one of the most important food crops in my country, is widely grown in neutral and weakly alkaline soil environments. Compared with acidic soils, neutral and weakly alkaline soils have stronger adsorption and precipitation effects on cadmium, which makes it easy for cadmium to accumulate in the soil for a long time and difficult to degrade or remove naturally. It is worth noting that wheat has a special physiological characteristic, which is that it can efficiently absorb cadmium in the soil from the roots and transport it to the aboveground part, especially the grains, thereby increasing the risk of cadmium enrichment in wheat grains.

[0003] Although some technical methods have been successfully applied to the cadmium prevention of rice in acidic soils, these methods are incapable of dealing with the cadmium enrichment of wheat in neutral and weakly alkaline soils. These technologies are often not only limited in effect, but also complicated in implementation, requiring a lot of manpower, material and financial resources, resulting in high costs and difficulty in large-scale promotion and application.

[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 grains while exploring a new technology or method that is cost-controlled, easy to operate, and has the potential for large-scale promotion. This is not only crucial to ensuring my country's food security and people's health, but also an important part of promoting sustainable agricultural development and achieving the goal of green ecological agriculture. Summary of the invention

[0005] Technical problem to be solved: In view of the problems that the existing technology is poor in effect, high cost and difficult to promote on a large scale in reducing the cadmium content in wheat grains in neutral and weakly alkaline soils, the present invention proposes a seed soaking agent for reducing the cadmium content in wheat grains in cadmium-contaminated soil and its application, aiming to effectively reduce the cadmium content in wheat grains.

[0006] Technical solution: Application of silver nitrate in the preparation of a seed soaking agent for reducing the cadmium content in crop seeds in cadmium-contaminated soil.

[0007] A seed soaking agent for reducing the cadmium content of crop seeds in cadmium-contaminated soil. The active ingredient of the seed soaking agent is a silver nitrate solution.

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

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

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

[0011] A seed soaking method for reducing the cadmium content in wheat grains comprises soaking wheat seeds with a seed soaking agent, wherein the wheat variety is Jimai 336.

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

[0013] After the wheat seeds are soaked, they are taken out and placed in an open space to dry naturally for 2 hours before being sown.

[0014] Beneficial effects: The seed soaking agent of the present invention is made by mixing conventional agents in a scientific ratio. Not only is the preparation process simple and easy, but the required concentration is also extremely low, which significantly reduces the cost of raw materials and the amount used. Soaking wheat seeds in the seed soaking agent can effectively inhibit the absorption and transport of cadmium in the soil by wheat, thereby significantly reducing the cadmium content in wheat grains and ensuring the quality and safety of agricultural products. In addition, the method of using the seed soaking agent is simple and quick, and does not require complex equipment or high investment, which greatly reduces the cost of agricultural production and improves agricultural production efficiency. Therefore, the present invention shows broad application prospects and significant economic benefits in reducing the cadmium content of wheat grains, ensuring food security, and promoting sustainable agricultural development. BRIEF DESCRIPTION OF THE 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 invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] A seed soaking method for reducing the cadmium content in wheat grains of the present embodiment comprises the following steps:

[0020] (1) Preparation of seed soaking agent

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

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

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

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

[0025] (2) Select the wheat variety Jimai 336, apply Ag1, Ag2, Ag3 concentrations for seed soaking treatment, the specific method is: two days before sowing, the seeds are soaked in different plastic barrels, and different soaking agents (Ag1, Ag2, Ag3) are contained in different plastic barrels, and a control group (CK) for pure water soaking is set up. After soaking for 16 hours, the seeds of each treatment group are fished out and placed in an open space to dry naturally for 2 hours before sowing. After sowing, conventional field operations are used until harvest. The test site is a cadmium-contaminated farmland, in which the cadmium content in the soil is 1.38 mg / Kg. At the same time, another cadmium-contaminated farmland is taken for a potted plant experiment, in which the cadmium content in the soil is 1.63 mg / Kg.

[0026] In field and pot experiments, wheat grain yield Figure 1 The results showed that silver nitrate seed soaking would not reduce wheat yield.

[0027] In different treatment groups, the cadmium content in wheat grains was Figure 2 The results showed that the cadmium content in the seeds decreased under the three soaking concentrations of Ag1, Ag2 and Ag3, achieving the purpose of reducing the accumulation of cadmium in the seeds. The field experiment showed that the cadmium content in the seeds was significantly reduced by 25% under the Ag2 soaking concentration; the pot experiment showed that the cadmium content in the seeds was significantly reduced by 37% under the Ag1 soaking concentration.

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

[0029] Of course, those skilled in the art should know that while the present invention is applicable to soils with cadmium contents of 1.38 mg / Kg and 1.63 mg / Kg, it can also produce improvement effects on other soils, but the variety of wheat seeds and the soaking concentration need to be adjusted according to actual conditions.

[0030] Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents in the specification, and its technical scope must be determined according to the scope of the claims. It should be known that this seed soaking test is only for the wheat variety Jimai 336. At the same time, after soaking, wheat is affected by various natural conditions in the field, and there are many uncontrollable factors. Based on the above ideal embodiment of the present invention as inspiration, the use of silver nitrate seed soaking agent can be promoted in cadmium-contaminated farmland where Jimai 336 is cultivated to achieve the purpose of reducing cadmium in wheat grains.

[0031] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 a seed soaking agent for reducing the cadmium content in crop seeds in cadmium-contaminated soil.

2. A seed soaking agent for reducing the cadmium content of crop seeds in cadmium-contaminated soil, characterized in that: The effective component of the seed soaking agent is silver nitrate solution.

3. The seed soaking agent according to claim 2, characterized in that In the seed soaking agent, the concentration of silver nitrate is 0.17 mg / L - 0.68 mg / L.

4. The seed soaking agent according to claim 3, characterized in that In the seed soaking agent, the concentration of silver nitrate is 0.34 mg / L.

5. The seed soaking agent according to claim 2, characterized in that In the seed soaking agent, the solute is water.

6. A seed soaking method for reducing the cadmium content in wheat grains, characterized in that: The wheat seeds are soaked with the seed soaking agent according to claim 2, and the wheat variety is Jimai 336.

7. The seed soaking method according to claim 6, characterized in that: The seed soaking time is 16 hours.

8. The seed soaking method according to claim 6, characterized in that: After the wheat seeds are soaked, they are taken out and placed in an open field to dry naturally for 2 hours before being sown.

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