CN112293424A - Grain breathable low-temperature hydrophobic coating agent and preparation method and application thereof - Google Patents
Grain breathable low-temperature hydrophobic coating agent and preparation method and application thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
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- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
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Abstract
The invention provides a grain breathable low-temperature hydrophobic coating agent and a preparation method and application thereof, belonging to the field of crop planting. According to the invention, peanut oil and/or palm oil-based coating emulsified oil (containing pyraclostrobin emulsion) is utilized, when the temperature is lower than or equal to 10 ℃, the emulsified peanut oil has hydrophobicity for blocking water, and when the temperature is higher than or equal to 12 ℃, the emulsified peanut oil has hydrophilicity, so that the germination of coated seeds at the temperature of lower than or equal to 10 ℃ can be inhibited; the emulsified palm oil is in a gel state at the temperature of less than or equal to 20 ℃ and is in a liquid state at the temperature of more than or equal to 24 ℃, so that the germination of the coated seeds at the temperature of less than or equal to 20 ℃ can be inhibited; the air-permeable low-temperature hydrophobic coating agent for the grain seeds contains pyraclostrobin, and the pyraclostrobin is a bacteriostatic agent for inhibiting respiration in a broad spectrum, can prolong the dormant period of the grain seeds to a certain extent, inhibits pathogenic bacteria infection from mildewing, and cannot damage the grain seeds.
Description
Technical Field
The invention relates to the technical field of crop planting, in particular to a grain breathable low-temperature hydrophobic coating agent and a preparation method and application thereof.
Background
The millet has a cultivation history of more than 8000 years, is a special coarse cereal in the north of China, has a annual planting area of about 3000 ten thousand mu, and is mainly planted along the great wall. The spring drought and summer drought are the bottlenecks of the dry farming agriculture along the great wall, most of the sections along the great wall belong to semi-dry cold areas, the annual precipitation is about 400mm, the water storage amount in the soil before freezing is about 100mm, and in the traditional farming mode of farming in 4-5 months, the water dispersion loss is large, and the planting cannot be carried out if the spring drought and summer drought occur. Only the dry-land millet sowed in the first 4 th ten days in the middle section of the great wall in China can normally emerge, and the millet cannot be sowed after the first 4 th month in the spring arid year. In order to solve the problems, the early sowing technology of mulching the mulching film in the middle ten days of 4 months is popularized in production, the seedling emergence is good, and the problems of 'autumn rain and spring rain' and 'spring rain full use' of water resources can be fundamentally solved. However, the millet sowed by the plastic film mulching in the last 4 th month of 2015 and 2020 meets the late frost period of-4 ℃ after the millet seedlings emerge in the last 4 th month, and the millet seedlings which emerge early and cannot resist the low temperature of-4 ℃ suffer from freezing damage. The problem that the grain seeding in the semiarid cold regions along the great wall is difficult to seed in spring drought and grow in summer drought exists.
Disclosure of Invention
In view of the above, the present invention aims to provide a grain breathable low-temperature hydrophobic coating agent, and a preparation method and an application thereof. The grain seed air-permeable low-temperature hydrophobic coating agent provided by the invention can be used for emulsifying and coating the grain seed with the food oil, so that the germination starting temperature of the grains can be increased, the germination time of the grains can be delayed, the late seedling emergence in winter or early spring can be realized, and the frost damage can be avoided.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a grain breathable low-temperature hydrophobic coating agent, which is prepared from food oil, sodium dodecyl alcohol ether sulfate, water and a pyraclostrobin emulsion, wherein the food oil is peanut oil and/or palm oil, and the dosage ratio of the food oil to the sodium dodecyl alcohol ether sulfate to the water to the pyraclostrobin emulsion is 10.0-15.0 mL: 0.1-0.15 g: 10L: 30mL, and the effective content of the pyraclostrobin emulsion is 25 wt%.
Preferably, the palm oil is palm oil with a melting point of 24 ℃, when the food oil is palm oil, the solidification point of the grain seed breathable low-temperature hydrophobic coating agent is 20 ℃, and the grain seed breathable low-temperature hydrophobic coating agent is in a semi-gel state at 21-23 ℃.
Preferably, when the food oil is peanut oil, the solidification point of the millet breathable low-temperature hydrophobic coating agent is 10 ℃, and the millet breathable low-temperature hydrophobic coating agent is in a semi-gel state at 10-12 ℃.
The invention also provides a preparation method of the millet seed breathable low-temperature hydrophobic coating agent, which comprises the following steps:
mixing food oil and sodium lauryl alcohol ether sulfate, and adding water to obtain a precursor of the breathable hydrophobic coating agent;
sequentially drying and freezing the gas-permeable hydrophobic coating agent precursor to obtain a gel-state condensate of the gas-permeable low-temperature hydrophobic coating agent precursor;
and mixing the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent, water and pyraclostrobin emulsion to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds.
Preferably, the drying temperature is 130 ℃ and the drying time is 1-1.5 hours.
Preferably, the temperature of the freezing treatment is 0-5 ℃.
The invention also provides an application of the grain seed air-permeable low-temperature hydrophobic coating agent in the technical scheme or the grain seed air-permeable low-temperature hydrophobic coating agent prepared by the preparation method in the technical scheme in grain seed coating, which comprises the following steps:
soaking the seeds in the air-permeable low-temperature hydrophobic coating agent for seed closing, then draining the seeds, and air-drying the drained coated seeds to obtain the air-permeable low-temperature hydrophobic coated seeds.
Preferably, the dosage ratio of the grain seeds to the grain seeds breathable low-temperature hydrophobic coating agent is 1.0 plus or minus 0.05kg to 1.1 plus or minus 0.05L.
Preferably, the seed soaking time is 10-30 minutes.
Preferably, the air-permeable low-temperature hydrophobic coated cereal seeds are preserved at 0-25 ℃, and the preservation time is not more than 6 months.
The invention provides a grain breathable low-temperature hydrophobic coating agent, which is prepared from food oil, sodium dodecyl alcohol ether sulfate, water and a pyraclostrobin emulsion, wherein the food oil is peanut oil and/or palm oil, and the dosage ratio of the food oil to the sodium dodecyl alcohol ether sulfate to the water to the pyraclostrobin emulsion is 10.0-15.0 mL: 0.1-0.15 g: 10L: 30mL, and the effective content of the pyraclostrobin emulsion is 25 wt%. In the invention, the food oil is emulsified in the process of preparing the grain seed breathable low-temperature hydrophobic coating agent.
Compared with the prior art, the invention has the following beneficial effects:
1. the main component of the peanut oil is Oleic acid, which is a monounsaturated Omega-9 fatty acid, formula C18H34O2The melting point is 13.4 ℃, the peanut oil and/or palm oil-based coating emulsified oil (pyraclostrobin emulsion) is utilized, when the temperature is less than or equal to 10 ℃, the emulsified peanut oil has hydrophobicity for blocking water, and when the temperature is more than or equal to 12 ℃, the emulsified peanut oil has hydrophilicity, so that the germination of coated seeds at the temperature less than or equal to 10 ℃ can be inhibited; when the seeds are required to germinate at the temperature of more than 20 ℃, the palm oil type emulsified coating agent is selected, when the temperature is less than or equal to 20 ℃, the emulsified palm oil has hydrophobicity for blocking water, and when the temperature is more than or equal to 24 ℃, the emulsified palm oil has hydrophilicity, and the germination of the coated seeds at the temperature of less than or equal to 20 ℃ can be inhibited.
2. The air-permeable low-temperature hydrophobic coating agent for the grain seeds provided by the invention contains pyraclostrobin, which is a bacteriostatic agent for inhibiting respiration in a broad spectrum manner, and the concentration of the pyraclostrobin is 0.3% (30mL/10L), so that the dormant period of the grain seeds can be prolonged to a certain extent, the mildew caused by germ infection can be inhibited, and the grain seeds can not be damaged.
3. In the invention, the edible oil is selected as a film forming agent, water absorption is blocked at the temperature lower than the solidification point of the edible oil, and the oil-in-water type air-permeable low-temperature hydrophobic coating agent is emulsified, so that the germination temperature of the seeds can be increased from 6 ℃ to more than 10 ℃ or more than 20 ℃, the germination time of the seeds is prolonged, the germination of the seeds sowed early is delayed, the probability of freezing of the seedlings is reduced, the moisture accumulated in soil in autumn and winter is fully utilized in a drought and cold ecological area, the spring drought resistant planting of film covering and early sowing in early winter or early spring can be realized, the seeds can emerge late and avoid the late frost period, and the damage of frost is prevented or alleviated. The coating agent prepared from the emulsified peanut oil is in a gel or semi-gel hydrophobic state at the temperature of less than 12 ℃, so that the millet seeds are not easy to absorb water and germinate, and the resting period of the millet seeds is prolonged. The initial temperature of grain seed germination is 6 ℃, the solidification temperature of peanut oil is 5 ℃, the solidification temperature of peanut oil is semi-condensed at 6-7 ℃, the peanut oil enters a liquid state at 8 ℃, dodecyl alcohol ether sodium sulfate is added for emulsification, drying is carried out, after the free water and micromolecule grease are volatilized, the solidification point temperature is increased to 10 ℃ from 7 ℃, the peanut oil is semi-condensed at 10-11 ℃, the peanut oil enters a liquid state at 12 ℃, and when the coating agent is in a condensed state and a semi-condensed state, the coating agent has strong hydrophobicity, so that the effect of delaying the germination of the coated grain seeds is achieved; when the temperature is more than or equal to 12 ℃, the water-repellent coating agent on the surface of the grain seeds is changed into liquid state, and the hydrophilicity is enhanced, so that the grain seeds can absorb water and germinate; when the temperature is higher than or equal to 15 ℃, the hydrophilicity is good, and the germination potential is the same as that of the uncoated fruit. Similarly, the emulsified palm oil type coating agent prepared from the palm oil with the melting point of 24 ℃ is adopted, the solidification point temperature of the emulsification is reduced from 24 ℃ to 20 ℃, the germination temperature of the seeds can be increased to 20 ℃, the palm oil type coating agent is in a semi-solidified state at 21-23 ℃, the palm oil type coating agent enters a liquid state at 24 ℃, and when the coating agent is in the solidified state and the semi-solidified state, the coating agent has strong hydrophobicity, so that the effect of delaying the germination of the coated grain seeds is achieved.
4. The invention can prepare the grain seed breathable low-temperature hydrophobic coating agent by selecting edible oil with different curing points according to the germination requirements of different crops in different periods, realizes the technical regulation and control of the dormancy stage of various grain seeds, and provides technical service for the production process of the crops.
5. The invention can also add 130mg ABA abscisic acid into 10L coating agent, the concentration is 50 mu mol/L, the dormancy stage of the grain seeds can be prolonged to a certain extent, the grain seeds are not damaged, and the ABA abscisic acid is a natural inhibitor which is widely existed in fruits and has good safety for inhibiting seed germination. 100-150 mg of brassin can also be added into 10L of coating agent, and can also be sprayed after seedling emergence, so that the frost resistance of the seedling emergence stage is enhanced.
The invention also provides a preparation method of the millet breathable low-temperature hydrophobic coating agent in the technical scheme, which comprises the following steps: mixing food oil and sodium lauryl alcohol ether sulfate, and adding water to obtain a precursor of the breathable hydrophobic coating agent; sequentially drying and freezing the gas-permeable hydrophobic coating agent precursor to obtain a gel-state condensate of the gas-permeable low-temperature hydrophobic coating agent precursor; and mixing the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent, water and pyraclostrobin emulsion to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds. The preparation method provided by the invention is simple and easy to realize industrialization.
The invention also provides the application of the grain seed breathable low-temperature hydrophobic coating agent in the technical scheme in grain seed coating, which comprises the following steps: soaking the seeds in the air-permeable low-temperature hydrophobic coating agent for seed closing, then draining the seeds, and air-drying the drained coated seeds to obtain the air-permeable low-temperature hydrophobic coated seeds. In the invention, the coating is uniform, the process is simple, and the millet seeds are not adhered and agglomerated. Can be combined with other coating methods, or can be used for re-coating the coated grains.
Detailed Description
The invention provides a grain breathable low-temperature hydrophobic coating agent, which is prepared from food oil, sodium dodecyl alcohol ether sulfate, water and a pyraclostrobin emulsion, wherein the food oil is peanut oil and/or palm oil, and the dosage ratio of the food oil to the sodium dodecyl alcohol ether sulfate to the water to the pyraclostrobin emulsion is 10.0-15.0 mL: 0.1-0.15 g: 10L: 30mL, and the effective content of the pyraclostrobin emulsion is 25 wt%.
In the present invention, the raw materials used in the present invention are selected from commercially available products in the art unless otherwise specified.
In the invention, the palm oil is preferably palm oil with a melting point of 24 ℃, and the solidification point temperature of the obtained grain seed breathable low-temperature hydrophobic coating agent is reduced from 24 ℃ to 20 ℃ due to emulsification. In the invention, the palm oil is mainly suitable for an ecological area requiring germination of grains at a high temperature, and the palm oil (with the melting point of 24 ℃) can be added into peanut oil to increase the germination temperature of the grains after a coating agent is added.
In the present invention, when the food oil is preferably peanut oil, the solidification point of the grain seed gas-permeable low-temperature hydrophobic coating agent is preferably 10 ℃, the main component of the peanut oil is Oleic acid, and the Oleic acid is a monounsaturated Omega-9 fatty acid, and the chemical formula C is18H34O2The melting point of the emulsified oil is 13.4 ℃, the peanut oil and/or palm oil-based coating emulsified oil (pyraclostrobin emulsion) is utilized, when the temperature is less than or equal to 10 ℃, the peanut oil has hydrophobicity for blocking water, is in a semi-gel state at 10-12 ℃, and has hydrophilicity when the temperature is more than or equal to 12 ℃, and the germination of coated seeds can be inhibited when the temperature is less than or equal to 10 ℃.
In the invention, the pyraclostrobin emulsion is a bacteriostatic agent for inhibiting respiration in a broad spectrum, can prolong the resting period of cereal seeds to a certain extent, inhibits pathogenic bacteria infection from mildewing, and does not damage the cereal seeds.
In the invention, the sodium lauryl alcohol ether sulfate is mainly used for emulsifying grease.
The invention also provides a preparation method of the millet seed breathable low-temperature hydrophobic coating agent, which comprises the following steps:
mixing food oil and sodium lauryl alcohol ether sulfate, and adding water to obtain a precursor of the breathable hydrophobic coating agent;
sequentially drying and freezing the gas-permeable hydrophobic coating agent precursor to obtain a gel-state condensate of the gas-permeable low-temperature hydrophobic coating agent precursor;
and mixing the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent, water and pyraclostrobin emulsion to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds.
The invention mixes the food oil and the sodium lauryl ether sulfate, and adds water to obtain the precursor of the air-permeable hydrophobic coating agent.
In the invention, the volume ratio of the food oil to the water is preferably 2-3: 2. In the invention, the water in the precursor of the air-permeable hydrophobic coating agent is used for further emulsifying the grease after the sodium lauryl alcohol ether sulfate is dissolved.
After adding water, the invention preferably stirs the obtained reactant into a uniform emulsion to obtain the precursor of the air permeable hydrophobic coating agent. The present invention is not particularly limited to the specific manner of stirring, and may be carried out in a manner known to those skilled in the art.
After obtaining the precursor of the air-permeable hydrophobic coating agent, the invention sequentially dries and freezes the precursor of the air-permeable hydrophobic coating agent to obtain the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent.
In the invention, the drying temperature is preferably 130 ℃, and the drying time is preferably 1-1.5 hours. In the invention, the peanut oil is a compound oil, and the free water, the small molecular oil and the solvent possibly existing in the squeezing of the edible oil can be removed by drying.
After the drying, the obtained dried product is preferably naturally cooled to room temperature to form the precursor concentrated solution of the breathable low-temperature hydrophobic coating agent.
In the present invention, the temperature of the freezing treatment is preferably 0 to 5 ℃. The time of the freezing treatment is not particularly limited, and the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent can be obtained.
After the gas-permeable low-temperature hydrophobic coating agent precursor gel-state condensate is obtained, the gas-permeable low-temperature hydrophobic coating agent precursor gel-state condensate, water and the pyraclostrobin emulsion are mixed to obtain the gas-permeable low-temperature hydrophobic coating agent for the millet seeds.
Preferably, the precursor gel-state condensate of the air-permeable low-temperature hydrophobic coating agent is fully vibrated at normal temperature, then water and pyraclostrobin emulsion are sequentially added, and the mixture is uniformly stirred to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds. The specific operation of uniformly stirring is not specially limited, and the grain seed breathable low-temperature hydrophobic coating agent can be obtained.
In the present invention, the grain seed air-permeable low-temperature hydrophobic coating agent is preferably not preserved for a long time, and the preparation time is preferably performed on the same day as the grain seed coating, and more preferably is performed simultaneously.
The invention also provides the application of the grain seed breathable low-temperature hydrophobic coating agent in the technical scheme in grain seed coating, which comprises the following steps:
soaking the seeds in the air-permeable low-temperature hydrophobic coating agent for seed closing, then draining the seeds, and air-drying the drained coated seeds to obtain the air-permeable low-temperature hydrophobic coated seeds.
In the invention, the dosage ratio of the grain seeds to the grain seeds breathable low-temperature hydrophobic coating agent is preferably 1.0 +/-0.05 kg:1.1 +/-0.05L, and more preferably 1kg: 1L.
In the invention, the seed-sealing time is preferably 10-30 minutes, the temperature is preferably room temperature, and no additional heating or cooling is required.
In the present invention, the temperature of the air drying is preferably 30 to 40 ℃, and the air drying time is not particularly limited, and the moisture can be completely removed.
In the present invention, the coating of the grain seeds is preferably performed within 2 weeks before the seed.
In the invention, the air-permeable low-temperature hydrophobic coating cereal seeds are preferably preserved at 0-25 ℃, and the preservation time is preferably not more than 6 months. In the present invention, the preservation is preferably performed in an open container or a gas-permeable bag, and the preservation is preferably performed under dry environmental conditions.
In order to further illustrate the present invention, the following examples are provided to describe the grain-ventilating low-temperature hydrophobic coating agent of the present invention and the preparation method and application thereof in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
The experimental time was 2019 and 8 months.
Using 10mL of first-stage pressed peanut oil with the fat content of 99.9 percent, which is produced by Laiyanglu flower aromatic peanut oil Co., Ltd, Shanxi Changzhi Aonike sodium dodecyl sulfate (K12) 0.1g, using 10L of self-made distilled water, using 30mL of suspension agent with the effective content of 25 percent, which is produced by Hebei Chengyue chemical Co., Ltd, adding sodium lauryl ether sulfate and distilled water into the peanut oil, and stirring to obtain precursor emulsion of the breathable low-temperature hydrophobic coating agent; baking at 130 deg.C for 1 hr to obtain peanut oil hydrophobic coating agent precursor concentrate, concentrating at 0 deg.C to obtain gel-state condensate, and preserving. Adding the gel-like cured substance into a distilled water container of 10L, stirring, adding the pyraclostrobin emulsion, and stirring to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds.
100g of No. 21 full millet seeds of Jingu are soaked in 100mL of the prepared air-permeable low-temperature hydrophobic coating agent for 10 minutes, and the air-permeable low-temperature hydrophobic coating millet seeds are formed after the seeds are drained and air-dried.
Taking 100g of No. 21 full grain of Jingu as a comparative example 1, carrying out a comparative germination test on a culture dish in an SPX-150B biochemical incubator, setting three groups of comparisons, registering germination data of different treatments at different temperatures and different times, counting and summarizing, and observing and recording the state changes of peanut oil and hydrophobic coating agent precursor concentrated solution under different temperature conditions.
Example 2
The experimental time was 2020, 9 months.
Taking 15mL of palm oil (melting point 24 ℃), using 0.15g of Shanxi changzhi Aonike sodium dodecyl sulfate (K12), using 10L of self-made distilled water, using 30mL of a suspending agent which is produced by Hebei Chengyue chemical Co., Ltd and has an effective content of 25%, adding sodium dodecyl alcohol ether sulfate and distilled water into peanut oil, and stirring to obtain a precursor emulsion of the breathable low-temperature hydrophobic coating agent; baking at 130 deg.C for 1 hr to obtain peanut oil hydrophobic coating agent precursor concentrated solution, forming hydrophobic coating agent precursor concentrated gel state condensate at 5 deg.C, and preserving. Adding the gel-like cured substance into a distilled water container of 10L, stirring, adding the pyraclostrobin emulsion, and stirring to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds.
100g of No. 21 full millet seeds of Jingu are soaked in 100mL of the prepared air-permeable low-temperature hydrophobic coating agent for 10 minutes, and the air-permeable low-temperature hydrophobic coating millet seeds are formed after the seeds are drained and air-dried.
100g of No. 21 full grain seeds of Jingu was taken as a comparative example 2, a comparative germination test was performed on a culture dish in an SPX-150B biochemical incubator, three sets of comparisons were set, germination data of different treatments at different temperatures and different times were registered, statistics and summarization were performed, and changes in state of peanut oil and hydrophobic coating agent precursor concentrate under different temperature conditions were observed and recorded.
Table 1 shows laboratory observations of the products of examples 1 and 2, Table 2 shows the germination potentials (%) observed in the grain chemical incubators of examples 1 and 1, Table 3 shows the change in germination rates (%) of the grains of examples 1 and 1 at 25 ℃, and Table 4 shows the germination potentials (%) of the grain chemical incubators of examples 2 and 2. As can be seen from tables 1 to 4: 1. the hydrophobic peanut oil coating agent (jin valley 21) can inhibit germination at low temperature of less than 12 ℃, basically does not germinate and does not mildew under the environment of moist soil at the temperature of less than or equal to 10 ℃, while uncoated grains germinate slowly at the temperature of 6-10 ℃ and mildew is generated in about 10 days; 2. the peanut oil breathable low-temperature hydrophobic coating agent precursor concentrated solution is in a gel state at the temperature of less than 10 ℃, is in a semi-gel state at the temperature of 10-11 ℃, and is in a liquid state at the temperature of more than or equal to 10 ℃; 3. when the hydrophobic coating agent of the peanut oil is more than or equal to 10 ℃ of seeds of grains (Jingu 21), the hydrophobic coating agent basically does not sprout and mildew in moist soil; when the temperature is 10-12 ℃, certain hydrophilicity is realized, and the germination is slow; the hydrophilicity is enhanced and the germination potential is accelerated at the temperature of more than or equal to 12 ℃, and the hydrophilicity is good and basically the same as the uncoated germination potential at the temperature of more than or equal to 15 ℃; at 25 ℃, the hydrophilicity is good and is the same as the germination potential of uncoated fruits; 4. the palm oil type hydrophobic coating agent grain seeds (jin grain 21) have small hydrophobic germination potential in moist soil when the temperature is less than or equal to 20 ℃; at the temperature of 21-24 ℃, the hydrophilicity is gradually enhanced, and the germination potential is increased; when the temperature is more than or equal to 25 ℃, the hydrophilicity is good, and the germination potential is the same as that of uncoated seeds.
Table 1 experimental data on laboratory observations of products from different preparations of examples 1 and 2
TABLE 2 germination percentage (%)
Note: -mildew; the standard temperature of the millet germination test is as follows: at 25 ℃.
TABLE 3 change in germination percentage (%) of the seeds of grains of example 1 and comparative example 1 at 25 ℃
| Jin Gu 21 | 2 days | 3 days | 4 days | 5 days | 6 days | 7 days |
| Comparative example 1 | 86.0 | 87.0 | 91.0 | 94.0 | 95.0 | 95.0 |
| Example 1 | 85.0 | 87.0 | 90.0 | 94.0 | 95.0 | 95.0 |
TABLE 4 germination vigor (%)
| Jin Gu 21 | 12℃ | 15℃ | 20℃ | 21℃ | 22℃ | 23℃ | 24℃ | 25℃ |
| Comparative example 2 | 80 | 83 | 84 | 85 | 85 | 86 | 86 | 87 |
| Example 2 | 0 | 5 | 15 | 45 | 68 | 75 | 83 | 87 |
Note: the germination vigour means the germination rate of 72 hours.
Application example 1
In 2019, 1000 mu millet autumn mulching spring early sowing test is carried out in Yuguan county, building, ditch, county, village, Baijia mouth village.
In 2019, 5 tons of water seepage mulching films are purchased from Shanxi micro-permeable water seepage film biotechnology limited company in Shanxi province, and in 2019, covering and seeding are carried out in rural junjiazucun of building ditches in 25-11 months and 3 days in 10 months. The seeds of the millet prepared in the example 1 are sowed in 10 days to 14 days in 4 months to 4 months in 2020, the seeds of the millet are covered with Zhang miscellaneous cereals No. 13, and seedlings emerge successively in 26 days to 28 days in 4 months to 4 months in 28 days, and the late frost with the lowest temperature of-6 ℃ is avoided after the seeds of the millet are sowed in 23 days to 24 days in 4 months to 4 months. And the seedlings of the Zhang miscellaneous cereal No. 3 and No. 5 mu contrast field which do not adopt the air-permeable low-temperature hydrophobic coating emerge from 21 days at 4 months to 23 days at 4 months, just catch up with late frost, and are rebroadcast after being frozen.
Application example 2
Thousand mu millet early sowing test in Shanyin county, Hengbao, county, east, two mountain villages in the country in 2020. The agricultural rural bureau in shanyin county on day 11 in year 4 in 2020, the spring sowing start-up conference of millet was held in shanyin county, heyday county, and the 2MB-1/3 water permeable mulching film and the biodegradable water permeable mulching film were adopted on day 11 in day 4 to day 15 in day 4 in month 11 in day 4 of the Shanyin county-Huisha, and 1000 mu of the breathable low-temperature hydrophobic coated jin millet 21 prepared in example 2 was sown. Seedlings emerge successively from 26 days to 28 days in 4 months and 28 days in 4 months, the lowest temperature of-8 ℃ in 24 days in 4 months and 23 days in 4 months is avoided, and the late frost with the lowest temperature of-3 ℃ on the earth surface is displayed by a soil temperature monitor in the morning in 24 days in 4 months. And the seeds of the Jingu No. 21 and No. 2 mu contrast field which do not adopt the air-permeable low-temperature hydrophobic coating germinate and have the top soil in 22-4-24 days of 4 months, just catch up with late frost and are seriously frozen, so that the seeds are replete. And as Shanyin does not rain in the first 5 th of year 2020 and in the middle, many dryland foxtail millet cannot be planted.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The air-permeable low-temperature hydrophobic coating agent for the cereal seeds is characterized by being prepared from food oil, sodium lauryl ether sulfate, water and a pyraclostrobin emulsion, wherein the food oil is peanut oil and/or palm oil, and the dosage ratio of the food oil to the sodium lauryl ether sulfate to the water to the pyraclostrobin emulsion is 10.0-15.0 mL: 0.1-0.15 g: 10L: 30mL, and the effective content of the pyraclostrobin emulsion is 25 wt%.
2. The grain seed air-permeable low-temperature hydrophobic coating agent as claimed in claim 1, wherein the palm oil is selected from palm oil with a melting point of 24 ℃, and when the food oil is palm oil, the solidification point of the grain seed air-permeable low-temperature hydrophobic coating agent is 20 ℃.
3. The millet breathable low-temperature hydrophobic coating agent of claim 1, wherein the solidification point of the millet breathable low-temperature hydrophobic coating agent is 10 ℃ when the food oil is peanut oil.
4. The preparation method of the millet breathable low-temperature hydrophobic coating agent as claimed in any one of claims 1 to 3, which is characterized by comprising the following steps:
mixing food oil and sodium lauryl alcohol ether sulfate, and adding water to obtain a precursor of the breathable hydrophobic coating agent;
sequentially drying and freezing the gas-permeable hydrophobic coating agent precursor to obtain a gel-state condensate of the gas-permeable low-temperature hydrophobic coating agent precursor;
and mixing the gel-state condensate of the precursor of the air-permeable low-temperature hydrophobic coating agent, water and pyraclostrobin emulsion to obtain the air-permeable low-temperature hydrophobic coating agent for the millet seeds.
5. The method according to claim 4, wherein the drying is carried out at 130 ℃ for 1 to 1.5 hours.
6. The method according to claim 4, wherein the temperature of the freezing treatment is 0 to 5 ℃.
7. The application of the millet seed air-permeable low-temperature hydrophobic coating agent as defined in any one of claims 1 to 3 or the millet seed air-permeable low-temperature hydrophobic coating agent prepared by the preparation method as defined in any one of claims 4 to 6 in millet seed coating is characterized by comprising the following steps:
soaking the seeds in the air-permeable low-temperature hydrophobic coating agent for seed closing, then draining the seeds, and air-drying the drained coated seeds to obtain the air-permeable low-temperature hydrophobic coated seeds.
8. The use of claim 7, wherein the ratio of the grain seeds to the grain seeds air-permeable low-temperature hydrophobic coating agent is 1.0 +/-0.05 kg:1.1 +/-0.05L.
9. The use according to claim 7, wherein the seed soaking time is 10-30 minutes.
10. The use of claim 7, wherein the gas permeable low temperature hydrophobic coated cereal seeds are preserved at 0-25 ℃ for no more than 6 months.
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