Green pollution-free heat-preservation ecological mulching film as well as preparation method and application thereof

Abstract

The invention provides a green pollution-free heat-preservation ecological mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural mulching films. The green pollution-free heat-preservation ecological mulching film is prepared from the following raw materials in parts by weight: 20 to 200 parts of bean flour, 22 to 450 parts of calcium chloride, 12 to 250 parts of urea, 3 to 10 parts of skim milk powder and 2 to 8 parts of sodium alginate. The prepared green pollution-free heat-preservation ecological mulching film has good heat preservation performance and does not need to be recycled after being used, residues can serve as fertilizer, the labor cost is reduced, and environmental pollution is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural mulch films, and in particular to a green, pollution-free, heat-insulating ecological mulch film and a preparation method and application thereof. Background Art

[0002] In the in-depth implementation of the national strategic requirements for high-quality development, we found that the widespread use of agricultural mulch has caused a waste of human resources and environmental pollution, which runs counter to our philosophy. Although agricultural mulch has many benefits, such as heat preservation and warming, moisture retention and water saving, inhibition of weed growth, improvement of soil fertility, prevention of pests and diseases, and increase in yields. However, there are also many disadvantages, such as environmental pollution, increased costs, high technical requirements, improper temperature control, transfer of pests and diseases, and the need for regular replacement. Therefore, it is urgent to provide a heat-insulating mulch that can reduce labor costs and does not need to be recycled after use, which can effectively solve the problems of environmental pollution caused by agricultural mulch, is conducive to protecting a good ecological environment, and is in line with the concept of sustainable development. Summary of the invention

[0003] The purpose of the present invention is to provide a green, pollution-free, heat-insulating ecological mulch film, which has a good heat-insulating effect and does not need to be recycled after use, thus saving costs and avoiding environmental pollution problems.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The invention provides a green, pollution-free, heat-insulating ecological mulch film, comprising the following raw materials in parts by weight: 20-200 parts of soybean powder, 22-450 parts of calcium chloride, 12-250 parts of urea, 3-10 parts of skimmed milk powder and 2-8 parts of sodium alginate.

[0006] The present invention provides a method for preparing the green, pollution-free, heat-insulating ecological mulch film, comprising the following steps:

[0007] (1) dissolving soybean powder in water to prepare a soybean powder solution;

[0008] (2) dissolving calcium chloride and urea in water to prepare a salt solution;

[0009] (3) mixing the soybean powder solution and the salt solution to obtain a mixed solution A;

[0010] (4) Add skimmed milk powder and sodium alginate to the mixed solution A to obtain a green, pollution-free, heat-insulating, ecological mulch film solution.

[0011] Preferably, the soybean powder in step (1) is obtained by roasting soybeans at 40-50° C. for 6-7 hours and then crushing them into 100-120 meshes.

[0012] Preferably, the mass volume ratio of soybean powder to water in step (1) is 1g:18-22ml.

[0013] Preferably, the mass ratio of calcium chloride to urea in step (2) is 110-120:60-65; and the concentrations of calcium chloride and urea in the salt solution are both 2-4 mol / L.

[0014] Preferably, the volume ratio of the soybean powder solution to the salt solution in step (3) is 1-3:1-3.

[0015] Preferably, in step (4), the final concentration of the skimmed milk powder is 1 to 5 g / L; and the final concentration of the sodium alginate is 1 to 3 g / L.

[0016] The present invention also provides a green, pollution-free, heat-insulating, ecological mulch film solution obtained by the preparation method.

[0017] The present invention also provides an application of the green, pollution-free, heat-insulating ecological mulch film solution as a mulch film.

[0018] Preferably, the green, pollution-free, heat-insulating ecological mulch film solution is sprayed onto the ground, the spraying nozzle has a spray volume of 3 to 5 L per second, and the nozzle stays at any location for 0.1 to 0.3 seconds.

[0019] The green and pollution-free ecological mulch provided by the present invention uses a hard shell layer formed by a soybean solution as an ecological mulch instead of an agricultural mulch, which does not need to be recycled after use and can also be used as a fertilizer, effectively saving human resources and being green and pollution-free. The present invention further improves the thermal insulation performance of the ecological mulch by adding skimmed milk powder and sodium alginate, which can effectively keep warm and increase humidity, and increase crop yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a flowchart of the implementation steps of the green, pollution-free, heat-insulating ecological mulch film;

[0021] Figure 2 These are the test results of the thermal insulation performance of the green, pollution-free, thermal insulation ecological mulch films prepared in Examples 1 to 6 and Comparative Examples 1 to 6 in the test examples. DETAILED DESCRIPTION

[0022] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0023] Preparation of soybean powder

[0024] After baking the soybeans in an oven at 40°C for 6 hours, the dried soybeans are crushed into 100 meshes using a grinder. The crushing process is carried out in small amounts and multiple times. The crushed soybean powder is stored in a low temperature (4-10°C) dry environment for later use.

[0025] The prepared bean powder can also be packaged into bean powder products of different specifications, and the package also contains a desiccant, with an amount of 10g per package. The desiccant is any one or more of silicon dioxide, silicate, aluminum oxide, aluminum silicate, calcium chloride or calcium oxide.

[0026] Example 1

[0027] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 1:1 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and the final concentration of skimmed milk powder is 3g / L and the final concentration of sodium alginate is 2g / L after being stirred evenly, so as to obtain a green and pollution-free thermal insulation ecological mulch solution.

[0028] Example 2

[0029] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 1:2 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and after being stirred evenly, the final concentration of the skimmed milk powder is 3g / L, and the final concentration of the sodium alginate is 2g / L, so as to obtain a green and pollution-free thermal insulation ecological mulch film solution.

[0030] Example 3

[0031] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 1:3 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and the final concentration of skimmed milk powder is 3g / L and the final concentration of sodium alginate is 2g / L after being stirred evenly, so as to obtain a green and pollution-free thermal insulation ecological mulch solution.

[0032] Example 4

[0033] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 2:1 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and the final concentration of skimmed milk powder is 3g / L and the final concentration of sodium alginate is 2g / L after being stirred evenly, so as to obtain a green and pollution-free thermal insulation ecological mulch solution.

[0034] Example 5

[0035] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 3:1 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and the final concentration of skimmed milk powder is 3g / L and the final concentration of sodium alginate is 2g / L after being stirred evenly, so as to obtain a green and pollution-free thermal insulation ecological mulch solution.

[0036] Example 6

[0037] The above-mentioned soybean powder is mixed with water in a ratio of 1g:20ml, and the soybean powder solution with a concentration of 50g / L is obtained after being fully stirred and dissolved; calcium chloride and urea are taken in a mass ratio of 110:60, and the calcium chloride and urea concentrations are both 3mol / L after being dissolved in water; the soybean powder solution and the salt solution are mixed in a volume ratio of 2:3 to obtain a mixed solution A; skimmed milk powder and sodium alginate are added to the mixed solution A, and the final concentration of skimmed milk powder is 3g / L and the final concentration of sodium alginate is 2g / L after being stirred evenly, so as to obtain a green and pollution-free thermal insulation ecological mulch solution.

[0038] Comparative Example 1

[0039] The preparation method is the same as that of Example 1, except that skimmed milk powder and sodium alginate are not added.

[0040] Comparative Example 2

[0041] The preparation method is the same as that of Example 2, except that skimmed milk powder and sodium alginate are not added.

[0042] Comparative Example 3

[0043] The preparation method is the same as that of Example 3, except that skimmed milk powder and sodium alginate are not added.

[0044] Comparative Example 4

[0045] The preparation method is the same as that of Example 4, except that skimmed milk powder and sodium alginate are not added.

[0046] Comparative Example 5

[0047] The preparation method is the same as that of Example 5, except that skimmed milk powder and sodium alginate are not added.

[0048] Comparative Example 6

[0049] The preparation method is the same as that of Example 6, except that skimmed milk powder and sodium alginate are not added.

[0050] Test example

[0051] Place enough hoses at the construction site in advance and lay them out, and connect the hoses to the water storage device and the nozzles. Use a bucket with sufficient volume to load the green, pollution-free, heat-insulating ecological mulch solution, and pump it to the nozzle with a 2-inch gasoline pump. The nozzle sprays 5L per second, and the hard shell layer formed by the nozzle on the ground is used as agricultural mulch. The nozzle stays at any place for 0.2s.

[0052] The green, pollution-free, heat-insulating ecological mulch film solutions prepared in Examples 1 to 6 and Comparative Examples 1 to 6 were sprayed on the ground to form mulch films. The temperature was measured three times in the morning, afternoon and evening, and compared with the untreated soil, to determine the heat-insulating performance of the mulch films.

[0053] The results show that the thermal insulation mulch prepared in Example 1 has the best thermal insulation performance, and the temperature can be increased by 60%, while the other examples decrease successively; the thermal insulation mulch prepared in the comparative example without adding skimmed milk powder and sodium alginate has significantly worse thermal insulation performance, indicating that skimmed milk powder and sodium alginate significantly improve the thermal insulation performance of the mulch.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A green, pollution-free, heat-insulating ecological mulch film, characterized in that: The invention comprises the following raw materials in parts by weight: 20-200 parts of soybean powder, 22-450 parts of calcium chloride, 12-250 parts of urea, 3-10 parts of skimmed milk powder and 2-8 parts of sodium alginate.

2. A method for preparing a liquid preparation of the green, pollution-free, heat-insulating ecological mulch film according to claim 1, characterized in that: The following steps are involved: (1) dissolving soybean powder in water to prepare a soybean powder solution; (2) dissolving calcium chloride and urea in water to prepare a salt solution; (3) mixing the soybean powder solution and the salt solution to obtain a mixed solution A; (4) Add skimmed milk powder and sodium alginate to the mixed solution A to obtain a green, pollution-free, heat-insulating, ecological mulch film solution.

3. The preparation method according to claim 2, characterized in that: The soybean powder in step (1) is obtained by roasting soybeans at 40-50° C. for 6-7 hours and then crushing the soybeans into 100-120 meshes.

4. The preparation method according to claim 2, characterized in that: The mass volume ratio of soybean powder to water in step (1) is 1g:18-22ml.

5. The preparation method according to claim 2, characterized in that: The mass ratio of calcium chloride to urea in step (2) is 110-120:60-65; the amount of water added is 1.3-29 times the total mass of calcium chloride and urea; the concentrations of calcium chloride and urea in the salt solution are both 2-4 mol / L.

6. The preparation method according to claim 2, characterized in that: The volume ratio of the soybean powder solution to the salt solution in step (3) is 1-3:1-3.

7. The preparation method according to claim 2, characterized in that: The final concentration of the skimmed milk powder in step (4) is 1-5 g / L; the final concentration of the sodium alginate is 1-3 g / L.

8. A green, pollution-free, thermal insulation, ecological mulch film solution obtained by the preparation method according to any one of claims 2 to 7.

9. Use of the green, pollution-free, heat-insulating, ecological mulch film solution according to claim 8 as a mulch film.

10. The use according to claim 9, characterized in that The green, pollution-free, heat-insulating ecological mulch film solution is sprayed onto the ground, the spraying nozzle has a spraying volume of 3 to 5 L per second, and the nozzle stays at any location for 0.1 to 0.3 seconds.

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