CN111793433B - Nano seed coating agent and preparation method thereof - Google Patents
Nano seed coating agent and preparation method thereof Download PDFInfo
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- CN111793433B CN111793433B CN202010717529.0A CN202010717529A CN111793433B CN 111793433 B CN111793433 B CN 111793433B CN 202010717529 A CN202010717529 A CN 202010717529A CN 111793433 B CN111793433 B CN 111793433B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/06—Coating or dressing seed
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
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Abstract
The invention discloses a nano seed coating agent, relates to the technical field of ecological agriculture, and is provided based on the problem that the seed coating agent in the prior art cannot be adapted to various environmental conditions. The invention is mainly prepared from the following raw materials in parts by weight: 2-200 parts of modified attapulgite, 2-40 parts of amino silicone oil, 2-40 parts of nano-silicon dioxide, 2-200 parts of calcium peroxide and 992 parts of ethanol 520-. The invention has the beneficial effects that: the nano-seed coating agent effectively wraps the seeds to form a net-shaped nano protective layer on the surfaces of the seeds, and the protective layer can not only efficiently absorb moisture in soil and air, but also prevent the absorbed moisture from losing, so that the seeds can obtain the moisture required by germination under the drought environmental condition.
Description
Technical Field
The invention relates to the technical field of ecological agriculture, in particular to a nano seed coating agent and a preparation method thereof.
Background
Seeds are the basis of agricultural growth processes and bear the development of agricultural technologies, so that the rapid development of seed protection technologies is very important for promoting agricultural growth. The cultivated land in China is widely distributed, and the agricultural production is influenced by various complex environmental factors (drought, waterlogging, saline alkali and the like). In the agricultural production process, the seed vigor is also obviously influenced to some extent by the large-amount release and accumulation of chemicals such as pesticides, chemical fertilizers and the like. In this context, seed coating technology has been developed rapidly. The use of the seed coating reduces the application amount of pesticide and seeds and the pollution to the environment urgently, and saves labor, cost and efficiency. Therefore, the seed coating technology is beneficial to agricultural sustainable development and has wide development prospect.
At present, seed coating becomes a comprehensive high-tech technology with high technological content and remarkable economic benefit, and the application of the seed coating is developed from the initial standard sowing to the aspects of preventing and controlling diseases, improving stress resistance, promoting crop growth and the like. The seed coating technology in China started in the last 70 th century and is developed slowly. After the implementation of the national "seed engineering program", the seed coating technology is rapidly developed and popularized. At present, a great deal of seed coating technical research in China mainly focuses on the aspects of research and development of film-forming materials and auxiliary agents, film-forming technology, active ingredient proportion and the like. However, the coating technology in China still has the following key problems: the coating dosage form is relatively laggard, the overall quality qualification rate of the coating agent is low, the development of new products is laggard, the development of coating machines is carried out, and the like. Therefore, the technology for vigorously developing the seed coating agent is urgently needed by the development of novel green agriculture at the present stage in China.
The research of the coating agent is a hot direction through a novel high polymer film-forming material and a composite film-forming technology. By adding some active ingredients, such as pesticides, bactericides, trace elements, plant growth regulators and the like, into the seed coating agent, multiple functions including promotion of seed germination, seedling growth and resistance to diseases and insect pests can be realized simultaneously. For example, patent application with publication number CN110946136A discloses a wheat seed coating agent and a preparation method thereof, which is prepared by the following raw materials: 0.08-0.10 part of benflumethamine, 0.01-0.02 part of menthol, 0.01-0.02 part of cytokinin, 4-5 parts of trehalose alcohol, 2-3 parts of amylose, 10-20 parts of methoxy polyethylene glycol, 3-5 parts of calcium bicarbonate, 1-2 parts of salicylic acid and 20-30 parts of Arabic gum, so that the germination rate of wheat seeds is improved, the occurrence of plant diseases and insect pests is reduced, and the using amount of pesticides is reduced.
The existing wheat coating agent is mainly the traditional coating agent containing high-residue pesticide, has certain influence on the vitality of wheat seeds, and has great harm to people, livestock and environment. Therefore, the research and development of the active ingredients which are green and environment-friendly and have high-efficiency sterilization characteristics are also a key direction of the research of the coating agent at present. The major problems with seed coating technology include the poor compatibility of a single type of coating agent to different environmental conditions. For example, patent publication No. CN104094961A discloses a cold-resistant seed coating agent, which comprises the following components: 0.5-5 parts of dimethyl sulfoxide, 0.05-1 part of proline, 6 parts of 70% imidacloprid water dispersible granules, 2 parts of gum arabic and 81.28-90.68 parts of water by weight, so that the cold resistance of the corn seeds can be effectively improved.
However, the breadth of our country is broad, the climate, the sudden change, the seed species and the diseases are different, and no single coating agent formula can be suitable for most regions. Therefore, the multifunctional nano coating material which can be suitable for different environmental conditions is developed, and the nano coating material plays an important role in the development of novel seed coating technology in China.
Disclosure of Invention
The technical problem to be solved by the invention is that the seed coating agent in the prior art cannot be suitable for various environmental conditions, and the invention provides a nano seed coating agent.
The invention solves the technical problems through the following technical means:
a nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 2-200 parts of modified attapulgite, 2-40 parts of amino silicone oil, 2-40 parts of nano-silicon dioxide, 2-200 parts of calcium peroxide and 992 parts of ethanol 520-.
Has the advantages that: the modified attapulgite, amino silicone oil, nanoscale silicon dioxide, calcium peroxide and ethanol are adopted to prepare the nano seed coating agent, so that seeds can be effectively coated, and a net-shaped nano protective layer is formed on the surface of the seeds, and the protective layer not only can efficiently absorb moisture in soil and air, but also can prevent the absorbed moisture from losing, so that the seeds can obtain the moisture required by germination under the drought environmental condition. Meanwhile, the protective layer can slowly release oxygen and hydrogen peroxide, can ensure that the seeds can be maintained to germinate and normally grow under the waterlogging condition, and can effectively inhibit the growth of microorganisms. The nano material can also fix free heavy metals such as cadmium, copper and the like in the environment, and can prevent the heavy metals from inhibiting seed germination and seedling growth. Can effectively promote the germination of seeds in adverse environments such as drought, waterlogging, heavy metal and harmful microorganism enrichment and the like.
The nano seed coating agent disclosed by the invention is natural, green, environment-friendly and safe, has no side effect, and can effectively promote seed germination and seedling growth under severe environmental conditions.
Preferably, the nano-seed coating agent is mainly prepared from the following raw materials in parts by weight: 50 parts of modified attapulgite, 20 parts of amino silicone oil, 10 parts of nano-silicon dioxide, 50 parts of calcium peroxide and 970 parts of ethanol.
Preferably, the nano-seed coating agent is mainly prepared from the following raw materials in parts by weight: 100 parts of modified attapulgite, 30 parts of amino silicone oil, 20 parts of nanoscale silicon dioxide, 100 parts of calcium peroxide and 750 parts of ethanol.
Preferably, the nano-seed coating agent is mainly prepared from the following raw materials in parts by weight: 150 parts of modified attapulgite, 40 parts of amino silicone oil, 30 parts of nano-silicon dioxide, 150 parts of calcium peroxide and 630 parts of ethanol.
Preferably, the nano-seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nanoscale silicon dioxide, 150 parts of calcium peroxide and 570 parts of ethanol.
Preferably, the nano-seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nanoscale silicon dioxide, 200 parts of calcium peroxide and 520 parts of ethanol.
Preferably, the mass ratio of the modified attapulgite to the calcium peroxide is 5: 1-5.
Has the advantages that: when the proportion of the two is in the range, the water retention of the nano seed coating agent to the seeds can be improved.
Preferably, the preparation method of the nano-seed coating agent comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 500-;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and silicon dioxide by using ethanol, heating and stirring, and then evaporating to dryness at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding ethanol, mixing and dissolving, heating and stirring, and then evaporating to dryness at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding ethanol for dissolving to obtain the nano seed coating agent.
The technical problem to be solved by the invention is that the seed coating agent in the prior art cannot be suitable for various environmental conditions, and the preparation method of the nano seed coating agent is provided.
A preparation method of a nano seed coating agent comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 500-;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and silicon dioxide by using ethanol, heating and stirring, and then evaporating to dryness at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding ethanol, mixing and dissolving, heating and stirring, and then evaporating to dryness at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding ethanol for dissolving to obtain the nano seed coating agent.
The invention has the advantages that: the modified attapulgite, amino silicone oil, nanoscale silicon dioxide, calcium peroxide and ethanol are adopted to prepare the nano seed coating agent, so that seeds can be effectively coated, and a net-shaped nano protective layer is formed on the surface of the seeds, and the protective layer not only can efficiently absorb moisture in soil and air, but also can prevent the absorbed moisture from losing, so that the seeds can obtain the moisture required by germination under the drought environmental condition. Meanwhile, the protective layer can slowly release oxygen and hydrogen peroxide, can ensure that the seeds can be maintained to germinate and normally grow under the waterlogging condition, and can effectively inhibit the growth of microorganisms. The nano material can also fix free heavy metals such as cadmium, lead and the like in the environment, and can prevent the heavy metals from inhibiting seed germination and seedling growth. Can effectively promote the germination of seeds in adverse environments such as drought, waterlogging, heavy metal and harmful microorganism enrichment and the like.
The nano seed coating agent disclosed by the invention is natural, green, environment-friendly and safe, has no side effect, and can effectively promote seed germination and seedling growth under severe environmental conditions.
Drawings
FIG. 1 is a scanning electron micrograph of silica according to the present invention;
FIG. 2 is a scanning electron micrograph of modified attapulgite in example 5 of the present invention;
FIG. 3 is a scanning electron micrograph of calcium peroxide according to example 5 of the present invention;
FIG. 4 is a scanning electron micrograph of a nanophase coating agent according to example 5 of the present invention;
FIG. 5 is a graph showing the effect of the nano-seed coating agent in improving drought resistance of wheat seeds in example 5 of the present invention;
FIG. 6 is a graph showing the effect of the nano-sized seed coating agent of example 5 of the present invention in improving waterlogging resistance of wheat seeds;
FIG. 7 is a graph showing the effect of the nano-seed coating agent in improving the antibacterial property of wheat seeds in example 5 of the present invention;
FIG. 8 is a graph showing the effect of modified attapulgite and calcium peroxide in different component ratios on water retention of wheat seeds; in the drawings, 0 to 7 denote attapulgite and CaO, respectively2The ratios of (A) to (B) are respectively 0: 0; 5:0,5: 1,5: 2,5: 3,5: 4,5: 5,0: 5;
FIG. 9 is a graph showing the adsorption results of cadmium ions by the nano-coating agent in example 13 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
Example 1
The nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 50 parts of modified attapulgite, 20 parts of amino silicone oil, 10 parts of nano-scale silicon dioxide, 50 parts of calcium peroxide and 870 parts of ethanol, wherein the mass ratio of the modified attapulgite to the calcium peroxide is 1: 1.
The preparation method of the nano-seed coating agent in the embodiment comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, and carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 500 ℃ and the power of 1KW, wherein the irradiation interval time is 3 minutes, and the effective irradiation time is kept for 30 minutes;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) 870 parts of ethanol is adopted to mix the modified attapulgite with the amino silicone oil and the silicon dioxide, and the mixture is heated, stirred and evaporated to dryness overnight at the temperature of 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding 870 parts of ethanol, mixing and dissolving, heating and stirring, and evaporating to dryness at 100 ℃ overnight;
(5) and (4) grinding and sieving the product obtained in the step (4), and adding 870 parts of ethanol for dissolving to obtain the nano seed coating agent. The ethanol in steps (3) and (4) is evaporated to dryness at 100 ℃ during the preparation process, so that the total ethanol content is 870 parts added in step (5).
Example 2
The nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 100 parts of modified attapulgite, 30 parts of amino silicone oil, 20 parts of nanoscale silicon dioxide, 100 parts of calcium peroxide and 750 parts of ethanol, wherein the mass ratio of the modified attapulgite to the calcium peroxide is 1: 1.
The preparation method of the nano-seed coating agent in the embodiment comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, and carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 700 ℃ and the power of 1KW, wherein the irradiation interval time is 3 minutes, and the effective irradiation time is kept for 30 minutes;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and silicon dioxide by using 750 parts of ethanol, heating and stirring, and evaporating to dryness overnight at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding 750 parts of ethanol, mixing and dissolving, heating and stirring, and then evaporating to dryness at 100 ℃;
(5) and (4) grinding the product obtained in the step (4), sieving the product with a 200-mesh sieve, and adding 750 parts of ethanol for dissolving to obtain the nano seed coating agent. The ethanol in steps (3) and (4) is evaporated to dryness at 100 ℃ during the preparation process, so that the total ethanol content is 750 parts of that added in step (5).
Example 3
The nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 150 parts of modified attapulgite, 40 parts of amino silicone oil, 30 parts of nanoscale silicon dioxide, 150 parts of calcium peroxide and 630 parts of ethanol, wherein the mass ratio of the modified attapulgite to the calcium peroxide is 1: 1.
The preparation method of the nano-seed coating agent in the embodiment comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, and carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 800 ℃ and the power of 1KW, wherein the irradiation interval time is 3 minutes, and the effective irradiation time is kept for 30 minutes;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) 630 parts of ethanol is adopted to mix the modified attapulgite with amino silicone oil and silicon dioxide, and the mixture is heated, stirred and evaporated to dryness overnight at the temperature of 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding 630 parts of ethanol, mixing and dissolving, heating and stirring, and evaporating to dryness overnight at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding 630 parts of ethanol for dissolving to obtain the nano seed coating agent. The ethanol in steps (3) and (4) is evaporated to dryness at 100 ℃ in the preparation process, so that the total ethanol content is 630 parts of the ethanol added in step (5).
Example 4
The nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nanoscale silicon dioxide, 150 parts of calcium peroxide and 570 parts of ethanol, wherein the mass ratio of the modified attapulgite to the calcium peroxide is 4: 3.
The preparation method of the nano-seed coating agent in the embodiment comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, and carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 700 ℃ and the power of 2KW, wherein the irradiation interval time is 3 minutes, and the effective irradiation time is kept for 30 minutes;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and silicon dioxide by adopting 570 parts of ethanol, heating and stirring, and then evaporating to dryness overnight at the temperature of 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding 570 parts of ethanol, mixing and dissolving, heating and stirring, and evaporating to dryness overnight at 100 ℃;
(5) and (4) grinding the product obtained in the step (4), sieving, and adding 570 parts of ethanol for dissolving to obtain the nano seed coating agent. The ethanol in steps (3) and (4) is evaporated to dryness at 100 ℃ during the preparation process, so that the total ethanol content is 570 parts of that added in step (5).
Example 5
The nano seed coating agent is mainly prepared from the following raw materials in parts by weight: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nanoscale silicon dioxide, 200 parts of calcium peroxide and 520 parts of ethanol.
The preparation method of the nano-seed coating agent in the embodiment comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 1000 ℃ and the power of 3KW, wherein the irradiation interval time is 3 minutes, and the effective irradiation time is kept for 30 minutes;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and silicon dioxide by using 520 parts of ethanol, heating and stirring, and evaporating to dryness overnight at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding 520 parts of ethanol, mixing and dissolving, heating and stirring, and evaporating to dryness overnight at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding 520 parts of ethanol for dissolving to obtain the nano seed coating agent. The ethanol in steps (3) and (4) is evaporated to dryness at 100 ℃ in the preparation process, so that the total ethanol content is 520 parts of that added in step (5).
Comparative example 1
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:0, the weight portion of the modified attapulgite is 200 parts, and the weight portion of the calcium peroxide is 0 part.
Comparative example 2
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 0:5, the weight part of the modified attapulgite is 0 part, and the weight part of the calcium peroxide is 200 parts.
Example 6
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:1, the weight portion of the modified attapulgite is 200 parts, and the weight portion of the calcium peroxide is 40 parts.
Example 7
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:2, the weight part of the modified attapulgite is 200 parts, and the weight part of the calcium peroxide is 80 parts.
Example 8
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:3, the weight portion of the modified attapulgite is 200 parts, and the weight portion of the calcium peroxide is 120 parts.
Example 9
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:4, the weight portion of the modified attapulgite is 200 parts, and the weight portion of the calcium peroxide is 160 parts.
Example 10
This comparative example differs from example 5 in that: the mass ratio of the modified attapulgite to the calcium peroxide is 5:5, the weight part of the modified attapulgite is 200 parts, and the weight part of the calcium peroxide is 200 parts.
Example 11
(I) observing silicon dioxide, modified attapulgite, calcium peroxide and the nano-seed coating agent prepared in the example 5 by using a scanning electron microscope
The experimental results are as follows: FIG. 1 is a scanning electron microscope image of silica, FIG. 2 is a scanning electron microscope image of modified attapulgite, FIG. 3 is a scanning electron microscope image of calcium peroxide, FIG. 4 is a scanning electron microscope image of seed coating agent, and it can be seen from FIGS. 1 to 4 that CaO is present2Can be well distributed in the nano structure formed by the modified attapulgite and the silicon dioxide.
(II) measurement of Properties of the Nanowoad coating agent prepared in example 5
The determination method comprises the following steps:
(1) determining the influence of the nano-seed coating agent on the germination of wheat seeds and the growth of seedlings under the drought condition: soaking wheat seeds in the nano seed coating agent solution for 2-3s, taking out, drying at room temperature, and uniformly sowing the seeds in a plastic round flowerpot (with the diameter of 8cm and the height of 8cm) filled with peat soil. After 30ml of water is supplied to each flowerpot, the flowerpot is placed in a room temperature environment to wait for the seeds to germinate. Seed germination rate is 100 number of germinated seeds/total number of sowings.
(2) Determining the influence of the nano seed coating agent on the germination of wheat seeds and the growth of seedlings under the waterlogging condition: soaking wheat seeds in the nano seed coating agent solution for 2-3s, taking out, drying at room temperature, and uniformly sowing the seeds in a plastic round flowerpot (with the diameter of 8cm and the height of 8cm) filled with peat soil. Completely immersing the flowerpot in water, and standing for 3 days; the pots were then removed from the water and placed in a room temperature environment for seed germination. Seed germination rate is 100 number of germinated seeds/total number of sowings. (3) Determining the influence of the nano seed coating agent on the germination of wheat seeds and the growth of seedlings under the condition of microbial contamination: soaking wheat seeds in a nano seed coating agent solution for 2-3s, taking out the wheat seeds, airing the wheat seeds at room temperature, uniformly sowing the wheat seeds in a glass culture dish (the diameter is 20cm) filled with wet filter paper, and uniformly spraying a suspension of Botrytis cinerea (purchased from China general microbiological culture Collection center, and the Latin name of the strain is Botrytis cinerea, and the CGMCC number is 3.4584) on the wheat seeds by using a spray bottle. The petri dish was placed in a room temperature environment for seed germination.
And (3) measuring results:
(1) as shown in FIG. 5, the germination rate of wheat seeds under drought conditions can be improved after the wheat seeds are treated by the coating agent.
(2) As shown in FIG. 6, the germination rate of wheat seeds under drought and waterlogging conditions can be improved after the wheat seeds are treated by the coating agent. The upper graph in FIG. 6 shows the growth of seedlings after 3 days of treatment, and the lower graph shows the growth of seedlings after 5 days of treatment, and it is obvious that the swelling potential of wheat seeds treated by the coating agent is obviously better than that of the control group.
(3) As shown in FIG. 7, the germination rate of wheat seeds under the condition of microbial contamination can be improved after the wheat seeds are treated by the coating agent. Coating agents 1, 2 and 3 are respectively attapulgite: CaO (CaO)2The proportion is 200: 50, 200: 100, 200: 200. wherein the microbial contamination rate of the coating agent 3 is minimal.
Example 12
Water retentivity of the coating agent of comparative examples 1-2 and examples 6-10 to the seeds was measured
The determination method comprises the following steps: seeds of wheat (about 5g) coated with different coating agents were weighed T0, respectively, and then placed in a glass petri dish having a diameter of 5 cm; uniformly spraying purified water on the surfaces of the seeds, and weighing the seeds by T1; after the petri dish was placed at room temperature for one hour, the seeds were weighed as T2; the seed water retention is (T2-T0)/(T1-T0) × 100.
And (3) measuring results: as shown in FIG. 8, the coating agents contained attapulgite and CaO2The ratios of (A) to (B) are respectively 0: 0; 5:0,5: 1,5: 2,5: 3,5: 4,5: 5,0: 5. with CaO2The water-retaining property of the material tends to increase remarkably with the increase of the addition ratio, while CaO alone is used2Cannot increase the water retention of wheat seeds, and is used when the attapulgite and CaO2When the ratio of (a) to (b) is more than 5:3, the water retentivity of the wheat seeds is reduced. Each experimental treatment contained three biological replicates.
Example 13
The adsorption performance of the coating agent of comparative examples 1-2 and 8 on heavy cadmium metal ions was measured
The determination method comprises the following steps: respectively uniformly suspending 30 mg of nano coating agent in 50ml of cadmium chloride (with the concentration of 10ppm), standing at room temperature for 1 hour, absorbing 5ml of supernatant solution, centrifuging, filtering by using a 0.22um filter membrane, and measuring the concentration of cadmium ions in different solutions by using an atomic absorption spectrophotometer.
And (3) measuring results: as shown in FIG. 9, 1 is a control solution, and 2-4 is attapulgite and CaO in the coating agent2In a ratio of 5:0,5: 3,0: 5. the result shows that the attapulgite and the calcium peroxide can well reduce the content of heavy metal cadmium in the solution, but the coating agent prepared by the attapulgite and the calcium peroxide according to a certain proportion (such as 5: 3) can better absorb cadmium ions. Each experimental treatment contained three biological replicates.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A nano-seed coating agent, which is characterized in that: the material is mainly prepared from the following raw materials in parts by weight: 2-200 parts of modified attapulgite, 2-40 parts of amino silicone oil, 2-40 parts of nano-silicon dioxide, 2-200 parts of calcium peroxide and 992 parts of ethanol 520-992, wherein the mass ratio of the modified attapulgite to the calcium peroxide is 5: 1-5;
the preparation method of the nano seed coating agent comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 500-;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and nano-scale silicon dioxide by using ethanol, heating and stirring, and then evaporating to dryness at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding ethanol, mixing and dissolving, heating and stirring, and then evaporating to dryness at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding ethanol for dissolving to obtain the nano seed coating agent.
2. The nanopeed coating of claim 1, wherein: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nanoscale silicon dioxide, 200 parts of calcium peroxide and 520 parts of ethanol.
3. The nanopeed coating of claim 1, wherein: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 50 parts of modified attapulgite, 20 parts of amino silicone oil, 10 parts of nanoscale silicon dioxide, 50 parts of calcium peroxide and 520 parts of ethanol.
4. The nanopeed coating of claim 1, wherein: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 100 parts of modified attapulgite, 30 parts of amino silicone oil, 20 parts of nanoscale silicon dioxide, 100 parts of calcium peroxide and 750 parts of ethanol.
5. The nanopeed coating of claim 1, wherein: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 150 parts of modified attapulgite, 40 parts of amino silicone oil, 30 parts of nano-silicon dioxide, 150 parts of calcium peroxide and 630 parts of ethanol.
6. The nanopeed coating of claim 1, wherein: the nano seed coating agent is mainly prepared from the following raw materials in parts by weight: 200 parts of modified attapulgite, 40 parts of amino silicone oil, 40 parts of nano-silicon dioxide, 120 parts of calcium peroxide and 570 parts of ethanol.
7. A method of preparing the nanopartical coating of any of claims 1-6, wherein: the method comprises the following steps:
(1) taking oxygen and ammonia gas as gas sources, carrying out intermittent irradiation treatment on the attapulgite powder under a vacuum condition by using plasma with the temperature of 500-;
(2) screening the attapulgite obtained in the step (1) by a 200-mesh sieve to obtain modified attapulgite;
(3) mixing the modified attapulgite with amino silicone oil and nano-scale silicon dioxide by using ethanol, heating and stirring, and then evaporating to dryness at 100 ℃;
(4) grinding the product obtained in the step (3), mixing with calcium peroxide, adding ethanol, mixing and dissolving, heating and stirring, and then evaporating to dryness at 100 ℃;
(5) and (4) grinding and sieving the product obtained in the step (4), and then adding ethanol for dissolving to obtain the nano seed coating agent.
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| CN105165825A (en) * | 2015-09-21 | 2015-12-23 | 中国科学院合肥物质科学研究院 | Coating agent reinforcing agent and preparation method and application thereof |
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| JPH0613446B2 (en) * | 1986-04-18 | 1994-02-23 | 小野田化学工業株式会社 | Seed padding |
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| CN105165825A (en) * | 2015-09-21 | 2015-12-23 | 中国科学院合肥物质科学研究院 | Coating agent reinforcing agent and preparation method and application thereof |
| CN105820822A (en) * | 2016-04-13 | 2016-08-03 | 中国科学院亚热带农业生态研究所 | Slow-release oxidizing agent taking calcium peroxide as substrate and attapulgite as envelope, and preparation method |
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