Wheat foliar fertilizer containing nano-selenium as well as preparation method and application of wheat foliar fertilizer

Abstract

The invention belongs to the technical field of foliar fertilizers, and particularly discloses a nano-selenium-containing wheat foliar fertilizer as well as a preparation method and application thereof. The nano-selenium-containing wheat leaf fertilizer is prepared from the following components in parts by mass: 3 to 5 parts of nano-selenium, 3 to 10 parts of trace elements, 0.1 to 5 parts of 24-epibrassinolide aqueous solution, 5 to 8 parts of low-molecular organic acid, 1 to 5 parts of amino acid, 5 to 15 parts of surfactant and 50 parts of water. The components are mixed to obtain the nano-selenium-containing wheat foliar fertilizer, and the nano-selenium-containing wheat foliar fertilizer is diluted with water and sprayed to the leaf surfaces of wheat plants during use. According to the invention, trace elements and selenium can play a synergistic role in promoting absorption, so that the overall stress resistance of plants is improved; the amino acid and the low-molecular organic acid can be chemically combined with the nano-selenium, so that the plant utilization rate of the selenium is increased. After the wheat foliar fertilizer is used, plant growth can be promoted, the yield can be increased, and selenium-rich products can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of foliar fertilizers, and in particular to a wheat foliar fertilizer containing nano-selenium and a preparation method and application thereof. Background Art

[0002] With the advancement of agricultural technology and the rise of the chemical industry, foliar fertilizers have gradually evolved from simple fertilizers based on natural organic matter to single nutrients synthesized by chemical synthesis, and then to compound foliar fertilizers containing multiple nutrients, as well as new fertilizers such as biological foliar fertilizers and nano foliar fertilizers that have emerged in recent years. Foliar fertilizers can quickly supplement nutrition, improve nutrient utilization, promote photosynthesis, enhance crop resistance, increase crop yields and improve crop quality. Foliar fertilizers are directly absorbed by leaves, avoiding the loss and fixation of nutrients in soil fertilization, allowing nutrients to quickly reach the plant body, meet the nutritional needs of crops during the critical growth period, and become an indispensable part of modern agriculture. Especially selenium-containing foliar fertilizers, after absorption, plants can not only produce selenium-rich products, but also increase the stress resistance of plants, making plants stronger.

[0003] As one of the most important and widely planted food crops, wheat is not only a basic food ingredient in human diet and supports people's staple food supply, but also plays a pivotal role in the development of agricultural economy and food security. However, the current selenium-containing foliar fertilizer is difficult to be absorbed by wheat, and there is no selenium-containing foliar fertilizer specially made for wheat.

[0004] Therefore, how to provide a wheat foliar fertilizer containing nano-selenium and its preparation method and application to promote wheat's absorption of selenium and increase added value; at the same time, how to enhance the stress resistance of wheat plants and increase yield through foliar fertilizer is a difficult problem to be solved urgently in this field. Summary of the invention

[0005] In view of this, the present invention provides a wheat foliar fertilizer containing nano-selenium and a preparation method and application thereof, which solves the problem that the existing selenium-containing foliar fertilizer is difficult to absorb and has an insufficient effect.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A nano-selenium-containing wheat foliar fertilizer comprises the following components in parts by mass: 3-5 parts of nano-selenium, 3-10 parts of trace elements, 0.1-5 parts of 24-epibrassinolide aqueous solution, 5-8 parts of low-molecular organic acid, 1-5 parts of amino acid, 5-15 parts of surfactant and 50 parts of water.

[0008] Preferably, the particle size of the nano-selenium is 20 to 100 nm.

[0009] Preferably, the trace elements include one or more of a zinc source, an iron source and a manganese source.

[0010] Preferably, the zinc source includes one or more of zinc sulfate, zinc chloride and chelated zinc;

[0011] The iron source includes one or more of ferrous sulfate, ferric chloride and chelated iron;

[0012] The manganese source includes manganese sulfate and / or mancozeb.

[0013] Preferably, the low molecular weight organic acid includes one or more of citric acid, malic acid and oxalic acid.

[0014] Preferably, the amino acids include one or more of glycine, cysteine ​​and methionine.

[0015] Preferably, the surfactant comprises ammonium alkylbenzene sulfonate and / or alkyl sulfonyl chloride.

[0016] Another object of the present invention is to provide a method for preparing wheat foliar fertilizer containing nano-selenium, comprising the following steps:

[0017] Nano-selenium, trace elements, 24-epibrassinolide aqueous solution, low-molecular organic acid, amino acid and surfactant are dispersed in water to obtain nano-selenium-containing wheat foliar fertilizer.

[0018] Another object of the present invention is to provide an application of wheat foliar fertilizer containing nano-selenium, specifically: the wheat foliar fertilizer containing nano-selenium is mixed and diluted with water, and sprayed onto the wheat leaves to complete fertilization.

[0019] Trace elements can play a synergistic role with selenium in promoting absorption, and selenium can protect plant cells from damage caused by adverse stress; trace elements are necessary for the normal growth and development of plants, and the synergistic effect of the two can improve the overall stress resistance of plants and enhance the resistance of plants to environmental stress; amino acids and low-molecular organic acids can form chemical bonds with nano-selenium to form small molecule complexes that are easier to absorb, which can increase the solubility and fluidity of nano-selenium, thereby improving its bioavailability; after amino acids and selenium are combined, they are still important forms of selenium in plants and can be directly used by plants; 24-epibrassinolide aqueous solution, as a plant growth regulator, can regulate the growth and development process of wheat, improve photosynthesis efficiency and stress resistance, help transport and accumulate selenium and trace elements in plants, and promote wheat growth and yield increase; surfactants can improve the dispersibility and uniformity of each component; during the application process, the surface tension of foliar fertilizer can be increased to make the distribution of foliar fertilizer on the leaf surface more uniform, thereby enhancing the adhesion ability and absorption efficiency of foliar fertilizer and the degree of wetness and absorption efficiency of foliar fertilizer.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention discloses a wheat foliar fertilizer containing nano-selenium, which contains nano-selenium, trace elements, auxin, amino acids and other components, and can promote the absorption of effective components by wheat plants, especially the absorption of selenium; so that the obtained product is selenium-rich (up to 800PPb or more), thereby improving the product competitiveness.

[0022] 2. The application of the foliar fertilizer of the present invention can effectively improve the stress resistance of wheat plants, make the plants stronger, and reduce the stress of plants when the environment changes; it is beneficial to the absorption of other trace elements and nutrients, promote plant growth and increase yield. DETAILED DESCRIPTION

[0023] The invention provides a nano-selenium-containing wheat foliar fertilizer, comprising the following components in parts by mass: 3-5 parts of nano-selenium, 3-10 parts of trace elements, 0.1-5 parts of 24-epibrassinolide aqueous solution, 5-8 parts of low-molecular organic acids, 1-5 parts of amino acids, 5-15 parts of surfactants, and 50 parts of water; preferably, 3.5-4.5 parts of nano-selenium, 5-9 parts of trace elements, 0.5-3 parts of 24-epibrassinolide aqueous solution, 6-7 parts of low-molecular organic acids, 2-4 parts of amino acids, 8-12 parts of surfactants, and 50 parts of water; further preferably, 4 parts of nano-selenium, 8 parts of trace elements, 2 parts of 24-epibrassinolide aqueous solution, 6.5 parts of low-molecular organic acids, 3 parts of amino acids, 10 parts of surfactants, and 50 parts of water.

[0024] In the present invention, the particle size of the nano-selenium is 20-100 nm, and specifically can be 25 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, or 90 nm.

[0025] In the present invention, the trace elements include one or more of a zinc source, an iron source and a manganese source.

[0026] In the present invention, the zinc source includes one or more of zinc sulfate, zinc chloride and chelated zinc.

[0027] In the present invention, the iron source includes one or more of ferrous sulfate, ferric chloride and chelated iron.

[0028] In the present invention, the manganese source includes manganese sulfate and / or mancozeb.

[0029] In the present invention, the 24-epibrassinolide aqueous solution is preferably a 24-epibrassinolide aqueous solution with a mass concentration of 0.01%.

[0030] In the present invention, the low molecular weight organic acid includes one or more of citric acid, malic acid and oxalic acid.

[0031] In the present invention, the amino acid includes one or more of glycine, cysteine ​​and methionine.

[0032] In the present invention, the surfactant comprises ammonium alkylbenzene sulfonate and / or alkyl sulfonyl chloride.

[0033] The present invention also provides a method for preparing nano-selenium-containing wheat foliar fertilizer, comprising the following steps:

[0034] Nano-selenium, trace elements, 24-epibrassinolide aqueous solution, low-molecular organic acid, amino acid and surfactant are dispersed in water to obtain nano-selenium-containing wheat foliar fertilizer.

[0035] The present invention also provides an application of nano-selenium-containing wheat foliar fertilizer, which specifically comprises: mixing and diluting the nano-selenium-containing wheat foliar fertilizer with water, and spraying the mixture onto the wheat leaves to complete fertilization.

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] Take 40g of nano-selenium (particle size is 25-55nm), 10g of sodium zinc ethylenediaminetetraacetate, 30g of EDTA chelated iron, 10g of mancozeb, 30g of 0.01% 24-epibrassinolide aqueous solution, 60g of citric acid, 10g of glycine, 10g of cysteine, 5g of methionine, and 100g of alkylbenzene ammonium sulfonate, disperse them into 500g of water to obtain wheat foliar fertilizer containing nano-selenium, and set aside.

[0039] Example 2

[0040] Take 30g of nano-selenium (particle size is 25-55nm), 20g of sodium zinc ethylenediaminetetraacetate, 30g of EDDHA chelated iron, 15g of mancozeb, 10g of 0.01% 24-epibrassinolide aqueous solution, 50g of citric acid, 5g of glycine, 3g of cysteine, 3g of methionine, and 50g of alkyl sulfonyl chloride, disperse them into 500g of water to obtain wheat foliar fertilizer containing nano-selenium, and set aside.

[0041] Example 3

[0042] Take 35g of nano-selenium (particle size is 25-55nm), 10g of zinc sulfate, 25g of EDTA chelated iron, 20g of mancozeb, 35g of 0.01% 24-epibrassinolide aqueous solution, 80g of malic acid, 3g of glycine, 5g of cysteine, 2g of methionine, and 80g of ammonium alkylbenzene sulfonate, disperse them into 500g of water to obtain wheat foliar fertilizer containing nano-selenium, and set aside.

[0043] Example 4

[0044] Take 50g of nano-selenium (particle size is 25-55nm), 15g of sodium zinc ethylenediaminetetraacetate, 15g of EDDHA chelated iron, 10g of manganese sulfate, 10g of 0.01% 24-epibrassinolide aqueous solution, 60g of malic acid, 10g of glycine, 10g of cysteine, 15g of methionine, and 80g of ammonium alkylbenzene sulfonate, disperse them in 500g of water to obtain wheat foliar fertilizer containing nano-selenium, and set aside.

[0045] Experimental Example 1

[0046] The 2-mu experimental field was equally divided into 4 areas, and experimental group 1, experimental group 2, experimental group 3 and control group 1 were randomly set up.

[0047] Experimental group 1 sprayed the wheat foliar fertilizer diluted in Example 1 at the tillering stage, booting stage and grain filling stage, spraying each time until the leaves just dripped water (the total spraying amount for three times was 2 g / mu in terms of nano-selenium);

[0048] Experimental group 2 sprayed the wheat foliar fertilizer diluted in Example 2 at the tillering stage, booting stage and grain filling stage, spraying each time until the leaves just dripped water (the total spraying amount for three times was 2g / mu in terms of nano-selenium);

[0049] Experimental group 3 sprayed the wheat foliar fertilizer diluted in Example 3 at the tillering stage, booting stage and grain filling stage, spraying each time until the leaves just dripped water (the total spraying amount for three times was 2g / mu in terms of nano-selenium);

[0050] Control group 1 was sprayed with clean water at the tillering stage, booting stage and grain filling stage until the leaves just dripped with water.

[0051] After the wheat matured, the yield was counted, and random samples were taken and ground into flour to test the selenium content in accordance with GB5009.93-2017. The results are shown in Table 1.

[0052] Table 1 Wheat yield and corresponding selenium content

[0053] Experimental Group 1 Experimental Group 2 Experimental Group 3 Control group 1 Output / catties 687 670 676 583 Selenium content / PPb 816 734 762 20

[0054] It can be seen from Table 1 that after applying the wheat foliar fertilizer containing nano-selenium described in the present invention, the wheat yield is significantly improved, which is 14-20% higher than that of the control group, and the wheat yield can be increased; in addition, the test results of the selenium content in wheat show that after applying the foliar fertilizer described in the present invention, the selenium content is significantly increased, meeting the relevant requirements of current selenium-enriched products.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wheat foliar fertilizer containing nano-selenium, characterized in that: The invention comprises the following components in parts by weight: 3-5 parts of nano-selenium, 3-10 parts of trace elements, 0.1-5 parts of 24-epibrassinolide aqueous solution, 5-8 parts of low-molecular organic acid, 1-5 parts of amino acid, 5-15 parts of surfactant and 50 parts of water.

2. A wheat foliar fertilizer containing nano-selenium according to claim 1, characterized in that, The particle size of the nano-selenium is 20-100 nm.

3. A wheat foliar fertilizer containing nano-selenium according to claim 1 or 2, characterized in that, The trace elements include one or more of a zinc source, an iron source and a manganese source.

4. A wheat foliar fertilizer containing nano-selenium according to claim 3, characterized in that: The zinc source includes one or more of zinc sulfate, zinc chloride and chelated zinc; The iron source includes one or more of ferrous sulfate, ferric chloride and chelated iron; The manganese source includes manganese sulfate and / or mancozeb.

5. A wheat foliar fertilizer containing nano-selenium according to claim 4, characterized in that, The low molecular weight organic acid includes one or more of citric acid, malic acid and oxalic acid.

6. A wheat foliar fertilizer containing nano-selenium according to claim 5, characterized in that: The amino acids include one or more of glycine, cysteine ​​and methionine.

7. A wheat foliar fertilizer containing nano-selenium according to any one of claims 4 to 6, characterized in that: The surfactant includes ammonium alkylbenzene sulfonate and / or alkyl sulfonyl chloride.

8. The method for preparing a wheat foliar fertilizer containing nano-selenium according to any one of claims 1 to 7, characterized in that: The steps include: Nano-selenium, trace elements, 24-epibrassinolide aqueous solution, low-molecular organic acid, amino acid and surfactant are dispersed in water to obtain nano-selenium-containing wheat foliar fertilizer.

9. Application of wheat foliar fertilizer containing nano-selenium prepared by the preparation method according to claim 8, characterized in that: Mix and dilute the wheat foliar fertilizer containing nano-selenium with water, and spray it on the wheat leaves to complete the fertilization.