Acidic solid environment improver for pig farm as well as preparation method and application of acidic solid environment improver

Abstract

The invention relates to the technical field of livestock breeding, in particular to an acidic solid environment improver for pig farms and a preparation method and application thereof.The acidic solid environment improver is prepared from, by mass, 80%-90% of natural mineral substances, 4%-8% of natural acidic extract, 4%-8% of natural organic acid and 0.5%-1% of photocatalytic nanometer materials, 1.5%-3.0% of natural compound essential oil; the sum of the mass percentages of the components is 100%. The composition has the advantages that the composition contains natural mineral components and natural active extract components, wherein the natural mineral components mainly comprise calcium bentonite and nano titanium dioxide; the natural active extract mainly comprises phenyllactic acid, citric acid and a plant extract; the feed additive has the effects of inhibiting bacteria, reducing humidity and deodorizing, is safe, non-toxic, free of drug resistance, free of residues, low in cost, stable in performance and simple to use when being applied to a pig farm environment, can remarkably reduce the number of bacteria in a pig house, reduce the concentration of ammonia gas in the pig house and the humidity of the environment, and plays an important role in maintaining a good breeding environment and reducing the incidence rate of pig herds.

Description

Technical Field

[0001] The present invention relates to the technical field of animal husbandry, and in particular to an acidic solid environment improver for pig farms, a preparation method thereof and an application thereof. Background Art

[0002] As my country's pig farming industry accelerates its scale and intensification, the continued growth in pork consumption is driving significant improvements in the industry's economic benefits. However, the high-density farming model presents a significant challenge in the centralized treatment of manure and sewage. Manure fermentation produces harmful gases such as hydrogen sulfide, ammonia nitrogen, and skatole, which, combined with the growth of pathogenic microorganisms, deteriorates the piggery environment. This not only threatens the health of pigs but also triggers complaints from surrounding residents and poses a risk of ecological pollution, severely hindering the sustainable development of the industry.

[0003] Chinese patent publication number CN108097032A discloses a farm deodorant and a method for using the deodorant to improve livestock production performance. The deodorant contains the following components by weight: 1%-5% propionic acid, 0.5%-8% malic acid, 5%-20% yeast, 2%-15% Bacillus, and 10%-30% lactic acid bacteria, with the remainder being water. The deodorant, which contains multiple bacterial species and chemical components, can quickly eliminate harmful gases in farms and prolong the duration of odor elimination. However, the patented deodorant relies solely on microorganisms, and the deodorizing effect is unstable due to their activity and influence. Furthermore, the deodorization effect is low because some bacteria are inhibited by acidifying the environment with organic acids, resulting in a low ammonia removal rate. Furthermore, the deodorant is unable to treat complex odor components such as hydrogen sulfide and skatole. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an acidic solid environment improver for pig farms, a preparation method and application thereof, which comprises natural mineral components (calcium-based bentonite, nano-titanium dioxide) and natural active extract components (phenyllactic acid, citric acid, plant extract deodorant). When applied to the pig farm environment, the acidic solid environment improver is safe and non-toxic, has no drug resistance, no residue, low cost, stable performance, and is easy to use. It can significantly reduce the number of bacteria in the pig house, reduce the ammonia concentration in the pig house and the humidity of the environment, and plays an important role in maintaining a good breeding environment and reducing the incidence of pig herds.

[0005] The present invention is achieved through the following technical solutions: First, it provides an acidic solid environmental improver for pig farms. Its raw materials, calculated by mass percentage, are composed of the following components: 80%-90% natural minerals, 4%-8% natural acidic extracts, 4%-8% natural organic acids, 0.5%-1% photocatalytic nanomaterials, and 1.5%-3.0% natural composite essential oils; the sum of the mass percentages of these components is 100%. All components involved in this formulation are natural products, and compared to existing technologies, it exhibits antibacterial, dehumidifying, and deodorizing effects.

[0006] The antibacterial efficacy involved in the present invention mainly utilizes the antibacterial effects of the components phenyllactic acid, citric acid, and nano-titanium dioxide. The phenyllactic acid involved in the present invention is a natural small molecule organic acid produced by the metabolism of microorganisms such as lactic acid bacteria. It has multiple antibacterial mechanisms and broad-spectrum antibacterial properties, showing significant inhibitory effects on pathogenic bacteria such as Listeria monocytogenes, Escherichia coli, and Staphylococcus aureus, as well as fungi such as Aspergillus niger and Aspergillus flavus. The pH stability and thermal stability of this substance are superior to traditional antibacterial agents, and it has shown application potential in the fields of food, feed, and biopesticides. Nano-titanium dioxide is an antibacterial agent that permanently maintains its antibacterial effect and is safe and non-toxic to the human body, has good thermal stability, and has strong antibacterial ability. Compared with the Chinese patent publication No. CN108097032A, which involves the addition of microbial cells, the phenyllactic acid and citric acid in the formula components involved in the present invention are secondary metabolites of the microbial cells themselves, have stable physical and chemical properties, outstanding antibacterial effects, and are not easily affected by external environmental interference and the antibacterial and deodorizing effects.

[0007] The dehumidification effect of the present invention is primarily due to the efficient water absorption of the calcium-based bentonite component. Bentonite is widely used as a desiccant in various products. It has the advantages of high moisture absorption capacity, fast water absorption rate, low cost, and non-corrosiveness.

[0008] The deodorizing effect of the present invention is mainly achieved through the synergistic effect of the various components in the formula. First, phenyllactic acid and nano-titanium dioxide, which have high antibacterial activity, can inhibit the release of ammonia produced by microbial metabolism in animal feces from the source. At the same time, the low pH of citric acid in natural organic acids can maintain a certain acidic environment, reduce the reproduction of microorganisms in the environment, and thus can permanently control the presence of odors such as ammonia in the environment. Secondly, natural minerals have extremely strong adsorption capacity, which further absorbs the odor produced by feces in the environment. Finally, the natural composite essential oil is compounded from wormwood essential oil, peppermint essential oil, and camphor seed essential oil, and has a certain natural plant fragrance, which can improve the air and mask odors in the environment.

[0009] Furthermore, the natural minerals include calcium bentonite, and the amount of calcium bentonite added accounts for 95%-99% of the total mass of the natural minerals. Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. The main chemical components are silicon dioxide, aluminum oxide and water. It also contains elements such as iron, magnesium, calcium, sodium, and potassium. The type of bentonite is determined by the type of interlayer cations. The interlayer cations are Na + It is called sodium bentonite; the interlayer cation is Ca 2+ The calcium bentonite involved in the present invention accounts for 95%-99% of the total mass of natural minerals, exhibits excellent adsorption and water absorption capacity, and can play the role of deodorization and dehumidification.

[0010] Furthermore, the mass ratio of the natural acidic extract to the natural organic acid is 1:0.5-2.5.

[0011] Furthermore, the natural acidic extract is selected from phenyllactic acid and its derivatives; and the natural organic acid is selected from at least one of citric acid and malic acid. Phenyllactic acid (PLA) is a natural, small-molecule organic acid produced by the metabolism of microorganisms such as lactic acid bacteria. It is a newly discovered, natural, non-toxic biopreservative with broad-spectrum antibacterial activity. Phenyllactic acid has a wide range of applications, not only in the food industry to inhibit various pathogens but also in the pharmaceutical and chemical industries. Phenyllactic acid is acid- and heat-resistant, maintaining high stability over a wide pH range. Its melting point is 121-125°C, and its activity remains intact at 120°C for 20 minutes. Citric acid, with the molecular formula C6H8O7, is an important organic weak acid. It is a colorless, odorless crystal that is readily soluble in water, and its solution is acidic. Citric acid is widely used as an acidity regulator (GB2760-2014), a flavoring agent, and a chelating agent.

[0012] Furthermore, the natural composite essential oil is compounded from wormwood essential oil, peppermint essential oil, and camphor seed essential oil; the mass ratio of the wormwood essential oil, peppermint essential oil, and camphor seed essential oil is 1:1:1. The wormwood essential oil, peppermint essential oil, and camphor seed essential oil are all obtained from natural plants through distillation and extraction, have good volatility, and the fragrant aroma of the essential oils themselves can improve the air freshness in aquaculture environments to a certain extent.

[0013] Furthermore, the photocatalytic nanomaterial is nano-scale titanium dioxide, also known as nano titanium dioxide, which appears as a loose white powder. It has anti-corrosion, antibacterial, self-cleaning, and anti-aging properties and can be used in cosmetics, functional fibers, plastics, inks, coatings, paints, fine ceramics, and other fields.

[0014] A method for preparing the above-mentioned acidic solid environment improver for pig farms is also provided, comprising the following steps:

[0015] Step S1, preparing raw materials according to the above ratio;

[0016] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0017] Step S3: screening, filling and sealing.

[0018] Furthermore, in step S2, the premixing speed is 20-50 rpm, and the mixing time is 5-10 min.

[0019] Finally, a method for applying the above-mentioned acidic solid environment improver for pig farms in a pig house environment is provided, comprising the following steps:

[0020] Step 1: Spread the improver evenly on the pig house floor at a dosage of 50-100g per square meter;

[0021] Step 2: For the feces accumulation area, spray the improver at a ratio of 1% of the feces weight, once a day;

[0022] In the first step, the improver reduces the ammonia concentration in the pig house from ≥22 mg / L to ≤1 mg / L within 48 hours;

[0023] In the second step, the Oxford cup method was used to prepare the bacterial solution at a concentration of 1×10 8 Under the condition of 100 CFU / mL, the diameter of the inhibition zone of Escherichia coli is ≥20mm, the diameter of the inhibition zone of Staphylococcus aureus is ≥16mm, and the diameter of the inhibition zone of Aspergillus niger is ≥19mm.

[0024] Furthermore, the water absorption rate of the improver is 118%-130%.

[0025] Beneficial effects:

[0026] Calcium bentonite, as a natural hygroscopic agent, can absorb 8-20 times its own volume of water and simultaneously absorb odor molecules; phenyllactic acid and citric acid inhibit bacterial metabolism through synergistic acidification (pH 2.5-3.5), and nano-titanium dioxide activates the surface of calcium bentonite under natural light to produce active oxygen free radicals (·OH, O 2- ) to achieve odor degradation and inactivation of pathogenic microorganisms; plant essential oils (mugwort, mint, camphor seed) neutralize odor molecules through organic acids and flavonoids, inhibit the generation of NH3, and form a four-dimensional synergistic mechanism of "moisture absorption-antibacterial-photocatalysis-deodorization".

[0027] The calcium bentonite (mineral adsorption), phenyllactic acid / citric acid (microbial fermentation), nano-titanium dioxide (photocatalytic material), and plant essential oil (plant distillation) involved in this invention contain no chemically synthesized ingredients and meet GRAS (Generally Recognized as Safe) standards. Its mechanism of action avoids the risk of drug resistance to antibiotics and chemical disinfectants, and is free of secondary pollution and toxic side effects. Furthermore, the raw material cost is low (≤3.5 yuan / kg), and the production process is simple (low-temperature mixing), making it suitable for the environmental and economic benefits of large-scale farming scenarios.

[0028] This improver can significantly reduce ammonia concentrations in piggeries (from ≥22mg / L to 0mg / L within 48 hours), inhibit pathogenic microorganisms (inhibition zone diameter ≥16mm, covering bacteria and fungi), and regulate humidity (water absorption rate of 130%, relative humidity reduction of 15%-20%). Compared to traditional chemical disinfectants and physical adsorption technologies, it combines long-term effectiveness (72 hours of sustained action), broad-spectrum (coordinated control of multiple pollutants), and safety (no residue, no corrosion). It can reduce the incidence of respiratory diseases in pigs by more than 65% and reduce feed mold rates by 80%, providing an efficient and economical integrated environmental control solution for green farming. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a diagram showing the process of measuring ammonia concentration in feces using an ammonia detector;

[0030] Figure 2 To determine the antibacterial effect of acidic solid environment modifiers on Escherichia coli using the Oxford cup method;

[0031] Figure 3 To determine the antibacterial effect of acidic solid environment modifier on Staphylococcus aureus using the Oxford cup method;

[0032] Figure 4 To determine the antibacterial effect of acidic solid environment modifier on Aspergillus niger using the Oxford cup method;

[0033] Figure 5 To investigate the actual deodorization effect of an acidic solid environmental improver in a pig farm. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] All other embodiments obtained by persons of ordinary skill in the art based on the embodiments herein without inventive effort are intended to fall within the scope of protection of the present invention. Experimental methods in the following examples, where specific conditions are not specified, were generally performed under conventional conditions or as recommended by the manufacturer. Unless otherwise indicated, all percentages, ratios, proportions, and parts are by weight.

[0036] Unless otherwise specified, the reagents and raw materials used in the examples and comparative examples of the present invention can be obtained through commercial channels.

[0037] Example 1 Evaluation of the effect of acidic solid environment modifier on pig odor removal

[0038] Manure in pig farms releases large amounts of ammonia, a highly irritating gas and the primary source of odor in pig farms. Ammonia can irritate pigs' respiratory tracts and damage the respiratory mucosal barrier, affecting their growth and development while also weakening their immune system and inducing various respiratory diseases, posing a significant threat to pig production. Table 1 shows the relationship between odor intensity and ammonia concentration.

[0039] Table 1 Relationship between odor intensity and ammonia concentration

[0040]

[0041] As shown in Table 1 above, the ability of acidic solid environmental modifiers to degrade ammonia in pig manure is an important indicator for evaluating the odor removal effect.

[0042] During the preparation of the acidic solid environment improver, three experimental groups were set up based on the changes in the mass ratio of calcium bentonite and plant extract essential oil. The specific components are:

[0043] Experimental group 1: calcium bentonite 90%, phenyllactic acid 4%, citric acid 4%, nano-titanium dioxide 0.5%, plant extract essential oil 1.5% (wormwood essential oil 0.5%, peppermint essential oil 0.5%, camphor seed essential oil 0.5%);

[0044] Experimental group 2: calcium bentonite 85%, phenyllactic acid 6%, citric acid 6%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%);

[0045] Experimental group 3: calcium bentonite 80%, phenyllactic acid 8%, citric acid 8%, nano-titanium dioxide 1%, plant extract essential oil 3% (wormwood essential oil 1%, peppermint essential oil 1%, camphor seed essential oil 1%).

[0046] Step S1, preparing raw materials according to the above ratio;

[0047] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0048] Step S3: screening, filling and sealing.

[0049] The feces in the pig house (wet 60-70%) were randomly selected and divided into a blank control group and a test group, and 100 g of feces was loaded into a sealed bottle, wherein the blank group was not treated, and the experimental group was sprayed with an acid solid environment modifier according to a weight ratio of 100:1 (i.e., 1 g of acid solid environment modifier was sprayed for 100 g of feces), and each treatment had 3 replicates. The test was carried out in a comfortable environment at room temperature of 28°C and air relative humidity of about 50%. The ammonia concentration was determined by the method (as shown in Figure 1 The average data of the ammonia determination results and the sensory evaluation results are shown in Table 2.

[0050] Table 2 Evaluation of the removal effect of the acid solid environment modifier on pig odor

[0051]

[0052] As shown in the above table, compared with the blank control, spraying 1% of the acid solid environment modifier can significantly reduce the ammonia concentration in the feces, and the ammonia removal effect is persistent, which can significantly reduce the ammonia concentration at 6h, and the ammonia concentration is continuously detected as 0 mg / L at 48h. The grouping comparison shows that the antibacterial substances benzyl lactate, citric acid and nano titanium dioxide added in the experimental group 3 are the most, which have better bacteriostatic effect, the low pH maintained by the acid extract is more persistent, which shows that the ammonia concentration is monitored as 0 mg / L at 24h, and the content of the natural plant extract essential oil is the most, and the essential oil fragrance is more persistent in the sensory evaluation.

[0053] In summary, through the test of the acid solid environment modifier on the removal effect of pig odor, it is shown that the acid solid environment modifier of the application has obvious effect on the removal of pig odor.

[0054] Example 2 Evaluation of the bacteriostatic effect of the acid solid environment modifier

[0055] In the preparation process of the acid solid environment modifier, based on the change of the mass ratio of the natural acid extract to the natural organic acid, 3 test groups were set. The specific composition is as follows:

[0056] Test group 1: calcium-based bentonite 85%, benzyl lactate 8%, citric acid 4%, nano titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, mint essential oil 0.75%, camphor tree seed essential oil 0.75%);

[0057] Test group 2: calcium-based bentonite 85%, benzyl lactate 6%, citric acid 6%, nano titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, mint essential oil 0.75%, camphor tree seed essential oil 0.75%);

[0058] Experimental group 3: calcium bentonite 85%, phenyllactic acid 4%, citric acid 8%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%).

[0059] The following steps are involved:

[0060] Step S1, preparing raw materials according to the above ratio;

[0061] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0062] Step S3: screening, filling and sealing.

[0063] Escherichia coli CMCC44102, Staphylococcus aureus GDMCC1.644, and Aspergillus niger CMCC98003 were selected as target pathogenic microorganisms for Gram-negative bacteria, Gram-positive bacteria, and fungi, respectively. Cultured Escherichia coli, Staphylococcus aureus, and Aspergillus niger were taken, and the bacterial lawns were washed with sterile saline and prepared into 1-1.5×10 8 CFU / mL bacterial suspension, shake well and set aside. Weigh 1.0g of acidic solid environment modifier and dissolve it in 19mL of sterile water to make a 20-fold diluted solution. Using the Oxford cup method, the Escherichia coli and Staphylococcus aureus suspensions were spread on NA medium (peptone 10.0g / L; beef powder 3.0g / L; sodium chloride 5.0g / L; agar 15.0g / L) plates, and the Aspergillus niger suspension was spread on PDA medium (potato extract powder 12.0g / L; glucose 20.0g / L; agar 15.0g / L) plates. Take 200μL of the diluted acidic solid environment modifier solution and add it to the Oxford cup of the plate coated with the target pathogenic microorganisms. The bacteria were kept at 37°C and the Aspergillus niger was kept at 28°C. The antibacterial effect was observed after 24 hours, and 3 replicates were performed for each treatment. The antibacterial effects of the acidic solid environment modifier are as follows: Figure 2-4 The specific inhibition zone diameters are shown in Table 3.

[0064] Table 3 Evaluation of the antibacterial effect of acidic solid environment modifiers using the Oxford cup method

[0065]

[0066] It can be seen from Table 3 above that the acidic solid environment modifier of the present invention has a good antibacterial effect on target pathogenic microorganisms such as Gram-negative bacteria, Gram-positive bacteria and fungi represented by Escherichia coli CMCC44102, Staphylococcus aureus GDMCC1.644, and Aspergillus niger CMCC98003. Comparing the three experimental groups, experimental group 1 has the best antibacterial effect. The main reason is that the content of the antibacterial component phenyllactic acid in this experimental group is the highest. As the content of phenyllactic acid decreases, the antibacterial effects of experimental groups 2 and 3 also decrease, indicating that the antibacterial effect evaluation effect of the acidic solid environment modifier of the present invention is obvious.

[0067] Example 3 Evaluation of water absorption effect of acidic solid environment improver

[0068] During the preparation of the acidic solid environmental improver, two test groups were set up based on the different bentonite. The specific components are:

[0069] Experimental group 1: calcium bentonite 85%, phenyllactic acid 6%, citric acid 6%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%);

[0070] Experimental Group 2: 85% sodium bentonite, 6% phenyllactic acid, 6% citric acid, 0.75% nano-titanium dioxide, 2.25% plant extract essential oils (0.75% wormwood essential oil, 0.75% peppermint essential oil, 0.75% camphor seed essential oil); comprising the following steps:

[0071] Step S1, preparing raw materials according to the above ratio;

[0072] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0073] Step S3: screening, filling and sealing.

[0074] The filter paper method was used to evaluate the water absorption effect of acidic solid environmental conditioners. A 55mm diameter circular filter paper was folded and placed against the wall of a funnel. The funnel was then placed on a 100mL graduated cylinder. 5.0g of the solid environmental conditioner was weighed and poured into the filter paper-lined funnel. 20mL of ultrapure water was slowly added to the dry powder disinfectant, allowing the water to slowly pass through the solid environmental conditioner and filter paper for approximately 10 minutes. After all the water was added, no water droplets dripped from under the filter paper for 2 consecutive minutes. Each treatment was repeated three times. The water absorption effect of the acidic solid environmental conditioner was evaluated by measuring the ratio of water absorption to the initial weight of the environmental conditioner.

[0075] Table 4 Evaluation of water absorption effect of different bentonites in preparing acidic solid environmental modifiers using filter paper method

[0076]

[0077] As shown in Table 4 above, the results show that the calcium bentonite used in the acidic solid environment improver formula of the present invention has a good effect and has a good water absorption and dehumidification effect. It can absorb a maximum of 130% of its own weight in water, and the average water absorption rate is 124%, which is greater than the 107% water absorption effect of the calcium bentonite used.

[0078] Example 4 Evaluation of pH Stability Effect of Acidic Solid Environmental Modifier

[0079] During the preparation of the acidic solid environmental improver, three experimental groups were set up based on the change in the mass ratio of the natural acidic extract to the natural organic acid. The specific components are:

[0080] Experimental group 1: calcium bentonite 85%, phenyllactic acid 8%, citric acid 4%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%);

[0081] Experimental group 2: calcium bentonite 85%, phenyllactic acid 6%, citric acid 6%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%);

[0082] Experimental group 3: calcium bentonite 85%, phenyllactic acid 4%, citric acid 8%, nano-titanium dioxide 0.75%, plant extract essential oil 2.25% (wormwood essential oil 0.75%, peppermint essential oil 0.75%, camphor seed essential oil 0.75%).

[0083] The following steps are involved:

[0084] Step S1, preparing raw materials according to the above ratio;

[0085] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0086] Step S3: screening, filling and sealing.

[0087] After the prepared test groups were allowed to stand at room temperature for 1-7 days, a small amount of sample was dissolved in deionized water at a dilution ratio of 1:20 and stirred thoroughly. After standing, the pH value of each experimental group was measured using a pH meter.

[0088] Table 5 Evaluation of pH stability effect of acidic solid environmental modifier

[0089]

[0090] As shown in Table 5 above, the results show that Test Group 1, due to its highest phenyllactic acid content, initially had a lower pH. Test Group 3, with its highest citric acid content, maintained a more stable low pH over 7 days. In summary, the acidic solid environmental conditioner prepared by the present invention can maintain a stable low pH over 7 days, thereby permanently inhibiting the growth and reproduction of pathogenic microorganisms in the environment.

[0091] Example 5 Evaluation of the actual application effect of acidic solid environment improver in a pig farm

[0092] The specific components of the preparation of the acidic solid environmental improver are: 85% calcium bentonite, 6% phenyllactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oil (0.75% wormwood essential oil, 0.75% peppermint essential oil, and 0.75% camphor seed essential oil).

[0093] The following steps are involved:

[0094] Step S1, preparing raw materials according to the above ratio;

[0095] Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed;

[0096] Step S3: screening, filling and sealing.

[0097] The actual application effect evaluation of a local pig farm was selected, and the improver was evenly spread on the pig house floor at a dosage of 100g per square meter; the deodorization effect, sensory evaluation and air humidity evaluation during use were mainly investigated. The control group selected a certain aquaculture acid environment improver currently sold on the market, and its usage was carried out according to the reference instructions.

[0098] Table 6 Evaluation of the actual application effect of acidic solid environmental improver in a pig farm

[0099]

[0100] As shown in Table 6, the results show that the acidic solid environment improver of the present invention reduced the ammonia concentration in the pig house from ≥22 mg / L to ≤1 mg / L within 48 hours; compared with the control group, the essential oil fragrance was more persistent in sensory evaluation, and the air humidity was able to be controlled at a comfortable environment of 65-75%, which fully demonstrates that the actual application effect of the acidic solid environment improver of the present invention in a certain pig farm is obvious and can meet actual production applications.

[0101] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An acidic solid environment improver for pig farms, characterized in that: The raw materials are composed of the following components by mass percentage: 80%-90% natural minerals, 4%-8% natural acid extracts, 4%-8% natural organic acids, 0.5%-1% photocatalytic nanomaterials, and 1.5%-3.0% natural composite essential oils; and the sum of the mass percentages of the components is 100%.

2. The acidic solid environment improver for pig farms according to claim 1, characterized in that: The natural minerals include calcium-based bentonite, and the added amount of the calcium-based bentonite accounts for 95%-99% of the total mass of the natural minerals.

3. The acidic solid environment improver for pig farms according to claim 1, characterized in that: The mass ratio of the natural acidic extract to the natural organic acid is 1:

1.

4. The acidic solid environment improver for pig farms according to claim 3, characterized in that: The natural acidic extract is selected from phenyllactic acid and its derivatives; the natural organic acid is selected from at least one of citric acid and malic acid.

5. The acidic solid environment improver for pig farms according to claim 1, characterized in that: The natural composite essential oil is compounded by mixing wormwood essential oil, peppermint essential oil and camphor seed essential oil; the mass ratio of the wormwood essential oil, peppermint essential oil and camphor seed essential oil is 1:1:

1.

6. A method for preparing the acidic solid environment improver for pig farms according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, preparing raw materials according to the above ratio; Step S2: premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, and then adding the natural composite essential oil and continuing to stir until a uniform solid powder is formed; Step S3: screening, filling and sealing.

7. The method for preparing the acidic solid environment improver for pig farms according to claim 6, characterized in that: In step S2, the premixing speed is 20-50 rpm, and the mixing time is 5-10 min.

8. An application of the acidic solid environment improver for pig farms according to any one of claims 1 to 5 in a piggery environment, characterized in that: The following steps are involved: Step 1: Spread the improver evenly on the pig house floor at a dosage of 50-100g per square meter; Step 2: For the feces accumulation area, spray the improver at a ratio of 1% of the feces weight, once a day; In the first step, the improver reduces the ammonia concentration in the pig house from ≥22 mg / L to ≤5 mg / L within 48 hours; In the second step, the Oxford cup method was used to prepare the bacterial solution at a concentration of 1×10 8 Under the condition of 100 CFU / mL, the diameter of the inhibition zone of Escherichia coli is ≥20mm, the diameter of the inhibition zone of Staphylococcus aureus is ≥16mm, and the diameter of the inhibition zone of Aspergillus niger is ≥19mm.

9. The use according to claim 8, characterized in that The water absorption rate of the improver is 118%-130%.

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