Novel efficient pig breeding circulating farm system

Abstract

The invention provides a novel efficient pig breeding circulating farm system, and belongs to the technical field of circulating agriculture. The circulating farm system comprises a fattening pig farm and a planting land; the fattening pig farm comprises a fully-closed linked fattening pig house and an excrement recycling system; the full-closed linked fattening pig house is provided with a precise ventilation system, a biological safety system, an environment control system and an intelligent feeding system. The excrement recycling system comprises an excrement treatment fungicide; the feces treatment microbial agent is prepared from geobacillus stearothermophilus, bacillus subtilis, enterococcus faecalis, rhodopseudomonas palustris and bacillus amyloliquefaciens. According to the method, the fattening pig farm and planting land circulation are organically combined, the manure generated by the fattening pig farm is recycled and returned to the field for planting, the use amount of chemical fertilizer for crops can be reduced by 50% or above, the income is increased by 8-10%, and full utilization of the manure is achieved.

Description

Technical Field

[0001] This invention relates to the field of circular agriculture technology, and in particular to a novel and efficient circular farm system for pig farming. Background Technology

[0002] The outbreak of major animal diseases such as African swine fever (ASF) has dealt a devastating blow to traditional pig farming practices, exposing the fatal weaknesses of small and medium-sized farms in terms of biosecurity. Traditional pig farms typically use open or semi-open pens with ventilation systems that are mostly horizontal or vertical, resulting in high energy consumption and difficulty in effectively blocking the spread of pathogens through the air and aerosols. Meanwhile, improper treatment of manure from livestock farming easily causes environmental pollution, while agriculture relies excessively on chemical fertilizers, leading to soil degradation and rising costs.

[0003] Currently, while some technologies attempt to improve ventilation or manure treatment, these are mostly optimizations of single aspects, lacking a systematic solution that deeply integrates efficient biosecurity, energy conservation and consumption reduction, high-density farming, and a non-circular farming system. Therefore, there is an urgent need in this field to provide a new, highly efficient circular pig farming system that can simultaneously address multiple issues such as disease control, environmental pressure, economic benefits, and sustainable development. Summary of the Invention

[0004] The purpose of this invention is to provide a novel and efficient circular farm system for pig farming, providing technical support for efficient and safe pig farming and efficient treatment of manure.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a novel and efficient circular farm system for pig farming, which includes fattening pig farms and planting land; The fattening pig farm includes fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig house is equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system; The fecal waste resource utilization system includes fecal waste treatment microbial agents; the fecal waste treatment microbial agents include thermophilic Bacillus steatophilus, Bacillus subtilis, Enterococcus faecalis, Rhodopseudomonas palustris, and Bacillus amyloliquefaciens.

[0006] Preferably, the area ratio of the fattening pig farm to the planting land is 24~40:70~110.

[0007] Preferably, the crops grown on the planting land include corn or wheat.

[0008] Preferably, the stocking density of fattening pigs is 0.6~1.0 m³. 2 / head.

[0009] Preferably, the precision ventilation system is a vertical precision intelligent ventilation system, and integrates a seasonal positive pressure air filtration system.

[0010] Preferably, the biosafety system includes a high-definition + AI camera and an air disinfection device; The air disinfection equipment is correlated with the probability of pathogen detection; the probability of pathogen detection is obtained by sampling using the air concentration collection method.

[0011] Preferably, the environmental control system includes a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device.

[0012] Preferably, the intelligent feeding system feeds fattening pigs with feed containing 0.3-0.7 wt% functional feed additives, including alfalfa meal, chicory root meal, isatis leaf meal, houttuynia cordata meal, and gentian meal, wherein the mass ratio of alfalfa meal, chicory root meal, isatis leaf meal, houttuynia cordata meal, and gentian meal is 40-50:15-25:10-20:10-20:5-10.

[0013] Preferably, the fattening pig feed further includes the following components in parts by weight: 450-550 parts corn, 100-200 parts soybean meal, 80-120 parts wheat, 20-40 parts fermented rapeseed meal, 10-20 parts soybean oil, 8-12 parts palm oil, 4-8 parts compound amino acids, 2-4 parts trace element premix, and 0.5-1.5 parts vitamin premix; The complex amino acids include L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan, and the mass ratio of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan is 35~45:10~20:5~10:3~5:2~4.

[0014] Preferably, the mass ratio of *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens* in the fecal treatment agent is 15-25:12-18:12-18:10-14:8-12, and the bacterial content of each is 1×10⁻⁶. 5 ~1×10 7 CFU / g; the dosage of the fecal treatment microbial agent is 0.05~0.15% of the weight of the fecal waste.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention combines the epidemiological characteristics of African swine fever with the climate and meteorological characteristics of the North China Plain, and adopts biosafety zoning management, fully enclosed pig houses, large-span connected buildings, and seasonal positive pressure air filtration systems to construct a new type of high-efficiency pig farming circular farm system, which has the characteristics of high biosafety, high efficiency and environmental protection.

[0016] This invention employs a precise ventilation mode and a seasonal sub-high-efficiency air filtration system, effectively preventing the introduction of major infectious diseases such as African swine fever. Compared to a combined horizontal and vertical ventilation mode, the vertical precise intelligent ventilation system significantly reduces fan energy consumption by 30-40%, greatly reduces daily ventilation volume in pigsties by 40-70%, and reduces energy consumption by approximately 30%. The new intelligent feeding system reduces feed waste by more than 50% and lowers the feed conversion ratio by approximately 0.2.

[0017] This invention adds high-definition AI cameras to the perimeter of the farm's perimeter wall to automatically identify external risk factors, simultaneously activating air disinfection equipment. The system is linked to the probability of detecting pathogens in the surrounding area, triggering biosafety early warning and emergency response plans. Inside the perimeter wall, a three-layer air filtration system is installed to comprehensively block important pathogen carriers such as dust and aerosols. Simultaneously, air samplers are configured and concentration technology is implemented to improve detection rates and risk classification.

[0018] This invention increases stocking density by 30% and significantly improves the slaughter rate per unit area through precise ventilation, 2 / 3 slatted floor, summer evaporative cooling assistance, and winter underfloor heating + insulated walls + heat recovery mode.

[0019] This invention also adds feed additives to the basic feed to reduce the mortality rate and incidence of diarrhea in pigs. The added alfalfa meal can improve the palatability of the feed, and the crude protein, saponins and other active ingredients it contains can also improve the nutritional value of the feed, improve the intestinal health of pigs, and enhance their antioxidant capacity. Chicory root powder is rich in inulin, which can promote the proliferation of beneficial bacteria in the intestines, maintain the health of the intestinal flora, and reduce the occurrence of diarrhea. Isatis leaf powder can inhibit pathogens such as Salmonella and improve the production performance of pigs. Houttuynia cordata powder has antibacterial effects and can enhance the disease resistance of pigs. Gentian powder can help digestion, promote appetite, enhance immunity and prevent diarrhea.

[0020] This invention also provides a manure treatment microbial agent capable of resource-based utilization of manure generated during pig farming for crop cultivation. The manure treatment microbial agent is composed of *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens*. *Bacillus stearothermophilus* can rapidly decompose lignin, cellulose, and hemicellulose in manure under high-temperature conditions, accelerating manure composting. *Bacillus subtilis* has a strong enzyme-producing capacity, rapidly decomposing large organic molecules such as proteins, starch, and fats, and secreting antibacterial substances to inhibit the growth of pathogenic microorganisms such as *Escherichia coli* and *Salmonella*. *Enterococcus faecalis* can produce organic acids, inhibiting the growth of putrefactive bacteria and pathogens. *Rhodopseudomonas palustris* can decompose odorous substances in manure, producing organic acids and amino acids, improving the nutritional value of the fermented biogas residue. *Bacillus amyloliquefaciens* can also rapidly decompose proteins and starches, secreting antimicrobial lipopeptides, improving the biosafety of the fermented biogas residue.

[0021] This invention organically combines fattening pig farms and planting land, making resource-efficient use of manure from fattening pig farms and returning it to the fields for planting. This can reduce the amount of chemical fertilizer used in crops by more than 50%, increase income by 8-10%, and achieve full utilization of manure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 A schematic diagram of a new type of efficient circular pig farming farm; Figure 2 This is an interior view of a fully enclosed, interconnected fattening pig house. Figure 3 This is an exterior view of a fully enclosed, connected fattening pig house. Detailed Implementation

[0024] This invention provides a novel and efficient circular farm system for pig farming, which includes fattening pig farms and planting land; The fattening pig farm includes fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig house is equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system; The fecal waste resource utilization system includes fecal waste treatment microbial agents; the fecal waste treatment microbial agents include thermophilic Bacillus steatophilus, Bacillus subtilis, Enterococcus faecalis, Rhodopseudomonas palustris, and Bacillus amyloliquefaciens.

[0025] In this invention, the area ratio of the fattening pig farm to the planting land is 24~40:70~110, preferably 26~38:80~100, more preferably 28~36:85~95, and even more preferably 32:90.

[0026] In this invention, the crops planted on the planting land include corn or wheat.

[0027] In this invention, the stocking density of fattening pigs is 0.6~1.0 m³. 2 / head, preferably 0.7~0.9 m 2 / head, further preferably 0.8 m 2 / head.

[0028] In this invention, the precision ventilation system is a vertical precision intelligent ventilation system, and it integrates a seasonal positive pressure air filtration system.

[0029] In this invention, the biosafety system includes a high-definition + AI camera and an air disinfection device; The air disinfection equipment is correlated with the probability of pathogen detection; the probability of pathogen detection is obtained by sampling using the air concentration collection method.

[0030] In this invention, the environmental control system includes a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device.

[0031] In this invention, the intelligent feeding system feeds fattening pigs with feed comprising 0.3-0.7 wt% functional feed additives, including alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder. The mass ratio of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder is 40-50:15-25:10-20:10-20:5-10.

[0032] In this invention, the fattening pig feed preferably includes 0.4 to 0.6 wt% of functional feed additives, and more preferably includes 0.5 wt% of functional feed additives.

[0033] In this invention, the preferred mass ratio of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder is 42~48:17~23:12~18:12~18:6~9, more preferably 44~46:19~21:14~16:14~16:7~8, and even more preferably 45:20:15:15:8.

[0034] In this invention, the fattening pig feed further includes the following components in parts by weight: 450-550 parts corn, 100-200 parts soybean meal, 80-120 parts wheat, 20-40 parts fermented rapeseed meal, 10-20 parts soybean oil, 8-12 parts palm oil, 4-8 parts compound amino acids, 2-4 parts trace element premix, and 0.5-1.5 parts vitamin premix. The complex amino acids include L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan, and the mass ratio of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan is 35~45:10~20:5~10:3~5:2~4.

[0035] In this invention, the fattening pig feed preferably includes the following components in parts by weight: 470-530 parts corn, 120-180 parts soybean meal, 90-110 parts wheat, 25-35 parts fermented rapeseed meal, 12-18 parts soybean oil, 9-11 parts palm oil, 5-7 parts compound amino acids, 2.5-3.5 parts trace element premix, and 0.8-1.2 parts vitamin premix; more preferably, it also includes the following components in parts by weight: 500 parts corn, 150 parts soybean meal, 100 parts wheat, 30 parts fermented rapeseed meal, 15 parts soybean oil, 10 parts palm oil, 6 parts compound amino acids, 3 parts trace element premix, and 1 part vitamin premix.

[0036] In this invention, the mass ratio of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan is preferably 37~43:12~18:6~9:3.5~4.5:2.5~3.5, and more preferably 40:15:8:4:3.

[0037] In this invention, the mass ratio of *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens* in the fecal treatment microbial agent is 15-25:12-18:12-18:10-14:8-12, preferably 17-23:14-16:14-16:11-13:9-11, and more preferably 20:15:15:12:10, with a bacterial content of 1×10⁻⁶ in each ratio. 5 ~1×10 7 CFU / g, preferably 1×10 6CFU / g; the dosage of the fecal treatment microbial agent is 0.05~0.15% of the weight of the fecal waste, preferably 0.08~0.12%, and more preferably 0.1%.

[0038] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0039] The trace element premix and vitamin premix used in the following examples were purchased from Binzhou Huijia Biotechnology Co., Ltd.; Bacillus thermophilus was purchased from Shenzhen Zike Biotechnology Co., Ltd., with the product number ATCC 12980; Bacillus subtilis was purchased from the China Agricultural Microbial Culture Collection Center, with the product number ACCC 05728; Enterococcus faecalis was purchased from Beina Biotechnology, with the product number BNCC192631; Rhodopseudomonas palustris was purchased from Beina Biotechnology, with the product number BNCC232041; and Bacillus amyloliquefaciens was purchased from the China Agricultural Microbial Culture Collection Center, with the product number ACCC 06476.

[0040] Example 1

[0041] A novel and efficient circular farm system for pig farming, comprising fattening pig farms and planting land with an area ratio of 10:35; The fattening pig farm consists of fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig pens are equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system. The precision ventilation system is a vertical, precise, and intelligent system, integrated with a seasonal positive pressure air filtration system. The biosecurity system consists of high-definition + AI cameras and air disinfection equipment. The air disinfection equipment is correlated with the probability of pathogen detection; this probability is obtained by sampling using an air concentration method. The environmental control system consists of a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device. The intelligent feeding system supplies fattening pig feed. The stocking density for fattening pigs is 0.6 m². 2 / head; The fattening pig feed consists of a basic feed and functional feed additives in a mass ratio of 99.7:0.3. The basic feed consists of the following components in parts by mass: 450 parts corn, 100 parts soybean meal, 80 parts wheat, 20 parts fermented rapeseed meal, 10 parts soybean oil, 8 parts palm oil, 4 parts compound amino acids, 2 parts trace element premix, and 0.5 parts vitamin premix. The compound amino acids consist of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan, with a mass ratio of 35:10:5:3:2. The functional feed additive consists of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder, with a mass ratio of 40:15:10:10:5. The manure resource utilization system consists of manure generated during pig farming, corn stalks, and a manure treatment microbial agent. The manure treatment microbial agent comprises *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens*, with a mass ratio of 15:12:12:10:8, and a bacterial content of 1×10⁻⁶ for each. 5 CFU / g; the dosage of the fecal treatment microbial agent is 0.05% of the weight of the fecal waste; When treating manure, corn stalks are used to adjust the carbon-to-nitrogen ratio to 25:1 and the moisture content to 60%. Then, manure treatment bacteria are added, and the mixture is covered with a black film before fermentation. The biogas produced during fermentation is used to power a biogas generator to supplement the farm's electricity. The biogas residue is applied to the planting land for corn cultivation.

[0042] Example 2

[0043] A novel and efficient circular farm system for pig farming, comprising fattening pig farms and planting land with an area ratio of 20:55; The fattening pig farm consists of fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig pens are equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system. The precision ventilation system is a vertical, precise, and intelligent ventilation system, integrated with a seasonal positive pressure air filtration system. The biosecurity system consists of high-definition + AI cameras and air disinfection equipment. The air disinfection equipment is correlated with the probability of pathogen detection; the pathogen detection probability is obtained by sampling using an air concentration method. The environmental control system consists of a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device. The intelligent feeding system supplies fattening pig feed. The stocking density for fattening pigs is 1.0 m². 2 / head; The fattening pig feed consists of a basic feed and functional feed additives in a mass ratio of 99.3:0.7. The basic feed consists of the following components in parts by mass: 550 parts corn, 200 parts soybean meal, 120 parts wheat, 40 parts fermented rapeseed meal, 20 parts soybean oil, 12 parts palm oil, 8 parts compound amino acids, 4 parts trace element premix, and 1.5 parts vitamin premix. The compound amino acids consist of L-lysine sulfate, L-threonine, and DL-... The product is composed of methionine, L-valine, and L-tryptophan, with the mass ratio of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan being 45:20:10:5:4; the functional feed additive is composed of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder, with the mass ratio of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder being 50:25:20:20:10. The manure resource utilization system consists of manure generated during pig farming, wheat straw, and a manure treatment microbial agent. The manure treatment microbial agent comprises *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens*, with a mass ratio of 25:18:18:14:12, and a bacterial content of 1×10⁻⁶ for each. 7 CFU / g; the dosage of the fecal treatment microbial agent is 0.15% of the weight of the fecal waste; When treating manure, wheat straw is used to adjust the carbon-to-nitrogen ratio to 25:1 and the moisture content to 60%. Then, manure treatment bacteria are added, and the mixture is covered with a black film before fermentation. The biogas produced during fermentation is used to power a biogas generator to supplement the farm's electricity. The biogas residue is applied to the planting land for wheat cultivation.

[0044] Example 3

[0045] A novel and efficient circular farm system for pig farming, comprising fattening pig farms and planting land with an area ratio of 15:45; The fattening pig farm consists of fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig pens are equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system. The precision ventilation system is a vertical, precise, and intelligent system, integrating a seasonal positive pressure air filtration system. The biosecurity system consists of high-definition + AI cameras and air disinfection equipment. The air disinfection equipment is correlated with the probability of pathogen detection; this probability is obtained by sampling using an air concentration method. The environmental control system consists of a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device. The intelligent feeding system supplies fattening pig feed. The stocking density for fattening pigs is 0.8 m². 2 / head; The fattening pig feed consists of a basic feed and functional feed additives in a mass ratio of 99.5:0.5. The basic feed consists of the following components in parts by mass: 500 parts corn, 150 parts soybean meal, 100 parts wheat, 30 parts fermented rapeseed meal, 15 parts soybean oil, 10 parts palm oil, 6 parts compound amino acids, 3 parts trace element premix, and 1 part vitamin premix. The compound amino acids consist of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan, with a mass ratio of 40:15:8:4:3. The functional feed additive consists of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder, with a mass ratio of 45:20:15:15:8. The manure resource utilization system consists of manure generated during pig farming, corn stalks, and a manure treatment microbial agent. The manure treatment microbial agent comprises *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens*, with a mass ratio of 15:12:12:10:8, and a bacterial content of 1×10⁻⁶ for each. 6 CFU / g; the dosage of the fecal treatment microbial agent is 0.1% of the weight of the fecal waste; When treating manure, corn stalks are used to adjust the carbon-to-nitrogen ratio to 25:1 and the moisture content to 60%. Then, manure treatment bacteria are added, and the mixture is covered with a black film before fermentation. The biogas produced during fermentation can be used by biogas generators to supplement the farm's electricity. The biogas residue is applied to planting land for corn cultivation.

[0046] Experimental Example 1

[0047] In Changyi, Shandong, a farm was planned and constructed according to the novel high-efficiency pig farming circular farm system described in Example 3. A schematic diagram of the constructed farm is shown below. Figure 1 As shown, the fattening pig farm covers 32 mu (approximately 2.8 hectares) and raises 6,000 fattening pigs. The planting land covers 90 mu (approximately 6 hectares) and is used for planting corn. An internal diagram of the fully enclosed, interconnected fattening pig sheds is shown below. Figure 2 As shown, the external diagram is as follows Figure 3 As shown.

[0048] The experimental group fed the fattening pigs and carried out resource-based treatment of the manure and wastewater from the pig farming process according to the method shown in Example 3. The difference between Comparative Example 1 and the experimental group lies in the different feeds used for fattening pigs and the different manure treatment microbial agents used for manure resource utilization. The fattening pig feed used in this comparative example consists of a basic feed and functional feed additives in a mass ratio of 99.5:0.5. The basic feed is the same as in Example 3. The functional feed additives do not contain Isatis tinctoria leaf powder or Gentiana scabra powder, but are composed of alfalfa powder, chicory root powder, and Houttuynia cordata powder in a mass ratio of 45:35:32. The manure treatment microbial agent used in this comparative example does not contain Bacillus stearothermophilus, but is composed of Bacillus subtilis, Enterococcus faecalis, Rhodopseudomonas palustris, and Bacillus amyloliquefaciens in a mass ratio of 25:25:15:10, with a bacterial content of 1×10⁻⁶ for each. 6 CFU / g; The difference between Comparative Example 2 and the experimental group lies in the feed used for fattening pigs and the manure treatment microbial agent used for manure resource utilization. The fattening pig feed used in this comparative example consists of a basal feed and alfalfa meal in a mass ratio of 99.5:0.5, the same as in Example 3. The manure treatment microbial agent used in this comparative example does not contain *Bacillus steatophilus* or *Rhodopseudomonas palustris*, but is composed of *Bacillus subtilis*, *Enterococcus faecalis*, and *Bacillus amyloliquefaciens* in a mass ratio of 30:30:15, with a bacterial content of 1×10⁻⁶ for each. 6 CFU / g.

[0049] The treatment groups were identical except for the feed used for fattening pigs and the manure treatment microbial agent used for manure resource recovery. Landrace pigs with an initial weight of 10±0.5 kg were used in the experiment, which lasted 60 days. During the experiment, the pigs had free access to feed and water. Manure generated during pig farming was transferred to the manure resource recovery system. After adjusting the carbon-to-nitrogen ratio to 25:1 and the moisture content to 60% with corn stalks, 0.1% of the manure weight of the manure treatment microbial agent was added, and the mixture was covered with a black film for fermentation for 20 days. The biogas residue was applied to the planting land for corn cultivation.

[0050] The body weight, number of deaths, and number of diarrhea cases of pigs in each treatment group were recorded. The physicochemical properties (pH, conductivity, volatile solids content, E4 / E6 value) of the biogas residue obtained after the resource utilization treatment of manure were measured. The average values ​​of the measurement results are shown in Tables 1 and 2.

[0051] Table 1 Statistical results of pig growth performance

[0052] Table 2 Results of physicochemical property determination of biogas residue

[0053] As shown in Table 1, the experimental group of pigs had the fastest growth rate and no deaths, and the incidence of diarrhea was also low. In contrast, the control groups 1 and 2 experienced partial deaths and had a higher incidence of diarrhea. This indicates that the functional feed additives added to the fattening pig feed are beneficial to the gastrointestinal health of pigs, reducing the occurrence of diarrhea and the number of deaths.

[0054] Table 2 shows that the pH of the biogas residue obtained from the experimental group and comparative groups 1-2 was close to neutral, which is suitable for crop growth. Electrical conductivity (EC) is an important indicator reflecting the soluble salt content in biogas residue. The higher the EC value, the higher the soluble salt content and the greater the nutrient supply capacity. When the EC value exceeds 4 mS·cm... -1 It can be toxic to plants. The electrical conductivity of the biogas residue in the experimental group and control groups 1 and 2 was less than 4 mS·cm. -1 The results indicate that the experimental group met the plant growth requirements, and the higher conductivity of the experimental group suggests that the manure treatment bacteria can more fully convert the manure generated during pig farming into easily soluble inorganic salts. Volatile solids (VSS) content is an important indicator of the degree of organic matter degradation. The VSS content of both the experimental group and comparative groups 1-2 decreased significantly before and after manure resource utilization treatment, indicating that the porosity and microbial activity of the organic material increased after treatment, and the organic material was degraded. The experimental group showed the highest rate of decrease, indicating the best degradation effect. The E4 / E6 value, which is the ratio of the absorbance of humic acid at 465nm and 665nm wavelengths, reflects the degree of humification. The smaller the E4 / E6 value, the higher the degree of humification. It can be seen that the E4 / E6 value of the biogas residue in the experimental group was significantly lower than that in comparative groups 1-2, indicating that the manure resource utilization treatment in the experimental group enabled better conversion of small-molecule humic acid into large-molecule humic acid. It is evident that, compared to comparative groups 1 and 2, the biogas residue obtained from the experimental group has a better nutrient supply capacity and is more conducive to promoting crop growth.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A novel and efficient circular farm system for pig farming, characterized in that, The circular farm system includes fattening pig farms and planting land; The fattening pig farm includes fully enclosed, interconnected fattening pig houses and a manure resource utilization system; The fully enclosed, interconnected fattening pig house is equipped with a precision ventilation system, a biosecurity system, an environmental control system, and an intelligent feeding system; The fecal waste resource utilization system includes fecal waste treatment microbial agents; the fecal waste treatment microbial agents include thermophilic Bacillus steatophilus, Bacillus subtilis, Enterococcus faecalis, Rhodopseudomonas palustris, and Bacillus amyloliquefaciens.

2. The circular farm system as described in claim 1, characterized in that, The area ratio of the fattening pig farm to the planting land is 24~40:70~110.

3. The circular farm system as described in claim 1, characterized in that, The crops grown on the land include corn or wheat.

4. The circular farm system as described in claim 1, characterized in that, The stocking density for fattening pigs is 0.6~1.0 m². 2 / head.

5. The circular farm system as described in claim 1, characterized in that, The precision ventilation system is a vertical precision intelligent ventilation system, and it integrates a seasonal positive pressure air filtration system.

6. The circular farm system as described in claim 1, characterized in that, The biosafety system includes a high-definition + AI camera and an air disinfection device; The air disinfection equipment is correlated with the probability of pathogen detection; the probability of pathogen detection is obtained by sampling using the air concentration collection method.

7. The circular farm system as described in claim 1, characterized in that, The environmental control system includes a 2 / 3 slatted floor, a summer evaporative cooling device, a winter underfloor heating system, insulated walls, and a heat recovery device.

8. The circular farm system as described in claim 1, characterized in that, The intelligent feeding system feeds fattening pigs with 0.3-0.7 wt% functional feed additives, including alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder. The mass ratio of alfalfa powder, chicory root powder, indigo leaf powder, houttuynia cordata powder, and gentian powder is 40-50:15-25:10-20:10-20:5-10.

9. The circular farm system as described in claim 8, characterized in that, The fattening pig feed also includes the following components in parts by weight: 450-550 parts corn, 100-200 parts soybean meal, 80-120 parts wheat, 20-40 parts fermented rapeseed meal, 10-20 parts soybean oil, 8-12 parts palm oil, 4-8 parts compound amino acids, 2-4 parts trace element premix, and 0.5-1.5 parts vitamin premix. The complex amino acids include L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan, and the mass ratio of L-lysine sulfate, L-threonine, DL-methionine, L-valine, and L-tryptophan is 35~45:10~20:5~10:3~5:2~4.

10. The circular farm system as described in claim 1, characterized in that, The mass ratio of *Bacillus stearothermophilus*, *Bacillus subtilis*, *Enterococcus faecalis*, *Rhodopseudomonas palustris*, and *Bacillus amyloliquefaciens* in the fecal treatment microbial agent is 15-25:12-18:12-18:10-14:8-12, and the bacterial content of each is 1×10⁻⁶. 5 ~1×10 7 CFU / g; the dosage of the fecal treatment microbial agent is 0.05~0.15% of the weight of the fecal waste.

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