Microbial feed as well as preparation method and application thereof in live pig breeding

Abstract

The invention relates to the technical field of feeds, and discloses a microbial feed as well as a preparation method and application thereof in live pig breeding. In the live pig feed, fresh sweet potatoes, sweet potato starch and fresh fly maggots are used as energy-type raw materials to replace corn, fly maggot powder is used to replace soybean meal and rapeseed meal, a microbial fermentation material, a Chinese herbal medicine compound, bone meal and salt are matched, a trace element additive, an antibiotic additive and the like are abandoned, and the comprehensive cost is only about 0.7 yuan / jin. In two phases, the energy contained in 3 jin of fresh sweet potatoes is equivalent to that contained in 1 jin of corn, the content of crude protein in the fly maggot powder is 60-65% and is far higher than that of soybean meal and rapeseed meal, and fly maggots contain various components such as chitin, antibacterial peptide and growth promoting factors besides rich amino acids, so that the immunity and the antiviral ability of live pig bodies can be greatly enhanced, the growth speed of live pigs is increased, and the survival rate of live pigs is increased. The value of the feed is far higher than that of soybean meal and rapeseed meal.

Description

Technical Field

[0001] The present invention relates to the technical field of feed, and in particular to a microbial feed and a preparation method thereof and application thereof in pig breeding. Background Art

[0003] In the total cost of pig production, the cost of breeding feed accounts for as high as 70-80%. Reducing feed costs and improving feed utilization efficiency are the top priorities in the series of measures to reduce costs and increase efficiency. For many years, the proportion of pig feed ration components has been mainly corn and soybean meal, supplemented by trace elements and drug additives. When the market prices of corn and soybean meal cannot be controlled, it is the only choice for pig farming companies to adjust the use of various trace elements, growth hormones for disease prevention and growth promotion, antibiotics, etc. in feed additives to increase the growth rate of pigs and reduce the feed-to-meat ratio in order to maximize feed utilization efficiency. Therefore, feed additives containing high trace elements (high copper, high zinc, high iron, etc.) and high antibiotics (oxytetracycline, chlortetracycline, azithromycin, etc.) have emerged. These feeds do play a certain role in increasing the growth rate of pigs and reducing the feed-to-meat ratio, but the effect in reducing costs and increasing efficiency is not great. The problem of high total cost of pig production has not been effectively solved, and the disadvantages it brings are even greater. First, the meat quality, flavor and taste of this kind of feed pigs are extremely poor. Second, the drug residues in this kind of feed pigs are harmful to people's health. Third, the feces of this kind of feed pigs have high heavy metal content, which pollutes the environment. Summary of the invention

[0004] The purpose of the present invention is to provide a microbial feed and a preparation method thereof and application in pig farming, so as to solve the problems of high feed cost, poor meat quality, serious veterinary drug residues and pollution to the environment around the farm in the current pig farming.

[0005] In order to achieve the above object, the first aspect of the present invention is to provide a microbial feed, which comprises the following components by weight:

[0006] 10-70 parts of cooked sweet potato starch, 10-50 parts of microbial fermentation material, 0.2-1 part of Chinese herbal compound, 0.5-2 parts of salt, and 0.5-2 parts of bone meal.

[0007] The second aspect of the present invention provides a method for preparing the microbial feed described in the first aspect of the present invention, the method comprising: weighing the raw materials according to the above weight ratio, adding warm water at a temperature of 35 to 40°C, and sealing and fermenting for 12 to 24 hours.

[0008] The third aspect of the present invention provides the use of the microbial feed described in the first aspect of the present invention in pig farming.

[0009] The microbial feed provided by the present invention, its preparation method and application in pig breeding have at least the following beneficial effects:

[0010] (1) In the present invention, the method of three-dimensional planting of sweet potatoes in a solar greenhouse is adopted. Five batches of sweet potatoes can be planted in two years. Each mu of solar greenhouse can produce about 200,000 catties annually, and the yield is 20 times that of single-season planting in the open field. The cost per catty is only 0.07 yuan; Pig manure and sweet potato residue are mixed and fermented as a cultivation material to cultivate maggots. Every 100 catties of cultivation material can cultivate 20 catties of maggots. The cost per catty of maggots is only 0.2 yuan, and the cost per catty of maggot powder prepared is also only 1 yuan. Pig feed is mainly composed of energy raw materials and protein raw materials. The current main energy raw material of pig feed is corn, and the main protein raw materials are soybean meal and rapeseed meal. Trace element additives and antibiotic additives are added. The comprehensive cost per catty of this feed is more than 1.5 yuan.

[0011] (2) In the present invention, fresh sweet potatoes, sweet potato starch and fresh maggots are used to replace corn as the energy-type raw materials in pig feed, maggot powder is used to replace soybean meal and rapeseed meal, and then combined with a highly efficient microbial fermentation material, while trace element additives and antibiotic additives are not used. Its comprehensive cost is only about 0.7 yuan per catty. By comparison, the energy contained in 3 catties of fresh sweet potatoes is equivalent to that in 1 catty of corn. Maggot powder contains 60-65% crude protein, which is much higher than soybean meal and rapeseed meal. In addition to rich amino acids, maggots also contain chitin, antibacterial peptides and growth factors and other components, which can greatly enhance the immune and antiviral abilities of pigs and improve the growth rate of pigs. Its feed value is much greater than that of soybean meal and rapeseed meal. In the present invention, sweet potatoes are used to replace corn, and maggot powder is used to replace soybean meal and rapeseed meal, combined with microbial fermentation materials and Chinese herbal medicine compounds. These raw materials are all natural, without adding any antibiotics and growth hormones, which not only reduces the feed cost by more than 60%, fundamentally solves the problem of high feed cost, but also produces green and high-quality pork. Its meat quality, taste and flavor are even better than those of local pigs raised in the countryside. And because the method of fecal sewage recycling is adopted in the specific implementation process, there is no pollution to the environment. Detailed implementation mode

[0012] As disclosed herein, the endpoints and any values in the disclosed ranges are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0013] As described above, the first aspect of the present invention provides a microbial feed. The microbial feed, in parts by weight, includes the following components:

[0014] 10 - 70 parts of cooked sweet potato starch slurry, 10 - 50 parts of microbial fermentation material, 0.2 - 1 part of Chinese herbal medicine compound, 0.5 - 2 parts of salt, 0.5 - 2 parts of bone meal.

[0015] According to a particularly preferred specific embodiment, the microbial feed further includes maggot powder;

[0016] The microbial feed, by weight, includes the following components:

[0017] 43 - 63 parts of cooked sweet potato starch slurry, 5 - 25 parts of maggot powder, 10 - 40 parts of microbial fermentation material, 0.2 - 1 part of Chinese herbal medicine compound, 0.1 - 0.8 parts of salt, 0.5 - 1.8 parts of bone meal.

[0018] According to a particularly preferred specific embodiment, the preparation method of the cooked sweet potato starch slurry is as follows:

[0019] S1: In a solar greenhouse, use steel pipes or bamboo and wood as pillars to build a planting rack with a height of 3 - 6m, a width of 1 - 3m, and a length of 5 - 1000m, and divide it into 3 - 10 planting platforms, with each layer having a height of 0.3 - 2m;

[0020] S2: After building the planting rack, install an integrated water and fertilizer automatic drip irrigation system above the planting platform, so as to use the water generated in pig breeding after fermentation treatment and add appropriate nutrient elements to supplement the water and fertilizer required during the growth period of sweet potatoes;

[0021] S3: Fill the planting substrate into a planting bag with a diameter of 0.2 - 0.8m and a height of 0.2 - 0.8m, plant sweet potato seedlings into the planting bag, and place them on the planting platform;

[0022] S4: Carry out daily management according to the same management method as that of sweet potato field planting, and adjust the temperature and light in the greenhouse according to each growth period of sweet potatoes. 2 - 3 seasons of sweet potatoes can be planted in a year, and the planted sweet potatoes are ground into starch slurry with a grinder.

[0023] Preferably, in step S3, the planting substrate is a cultivation material after maggot cultivation, rice husk powder, and soil with a weight content ratio of 1 - 2:1 - 2:3 - 7.

[0024] Further preferably, the preparation method of the maggot powder is as follows: First, put maggot eggs in the cultivation material for cultivation, separate the maggots, soak them in 100°C water for 10 minutes for disinfection and sterilization treatment, then dry them with a dryer and grind them into powder for standby; the cultivation material is made by mixing sweet potato residue and pig manure after dry - wet separation, adding Huoli 99 fermentation liquid, stirring evenly, and sealing and fermenting at room temperature of 25 - 30°C for 72h.

[0025] Preferably, the microbial fermentation material, by weight, comprises the following components: 5-40 parts of wheat sprout pulp, 1-30 parts of fly maggot pulp, 5-20 parts of rice bran, 1-50 parts of dehydrated sweet potato starch, 0.2-2 parts of Chinese herbal medicine compound;

[0026] And the preparation method of the microbial fermentation material includes: weighing raw materials according to the ratio of weight, adding 99 vitality fermentation liquid, stirring evenly, adjusting the water content to 60-65% with 40°C warm water, and sealing and fermenting at 22°C for 72h.

[0027] According to a particularly preferred specific embodiment, in the microbial fermentation material, the preparation method of the fly maggot pulp is as follows: put 20g of fly maggot eggs in 100 catties of cultivation material and cultivate for 4 days, separate the fly maggots, disinfect and sterilize the separated fly maggots, and then grind them into pulp with a pulp grinder; the cultivation material is to mix sweet potato residue and pig manure with a weight ratio of 1:1, add 5 catties of 99 vitality fermentation liquid, stir evenly, and seal and ferment for 72h.

[0028] Preferably, the Chinese herbal medicine compound, by weight, comprises the following components: 20-100 parts of astragalus membranaceus, 1-5 parts of angelica sinensis, 10-50 parts of isatis root, 10-50 parts of eucommia ulmoides, 100-200 parts of zingiber officinale, 100-200 parts of dried tangerine peel, 50-150 parts of betaine.

[0029] As described above, the second aspect of the present invention provides a method for preparing the microbial feed of the first aspect of the present invention, and the method includes: weighing raw materials according to the above weight ratio, adding warm water at 35-40°C, and sealing and fermenting for 12-24h; based on the weight of 100 parts of the microbial feed, the dosage of the warm water is 150-250 parts.

[0030] As described above, the third aspect of the present invention provides the application of the microbial feed of the first aspect of the present invention in pig breeding.

[0031] The effects of the raw materials in the microbial feed of the present invention are as follows:

[0032] 99 vitality fermentation liquid: mainly composed of lactic acid bacteria, bacillus subtilis, candida utilis, supplemented with saccharomyces cerevisiae, saccharomyces cerevisiae, lactobacillus paracasei, aspergillus, trichoderma, aspergillus oryzae, saccharifying enzyme and other beneficial microorganisms. The pig microbial feed prepared with it as a fermenting agent can significantly improve the body immunity of pigs, protect the stomach and intestines, remove hormones in the pigs, reduce the odor of feces, improve the digestion and absorption rate, and can significantly improve the pork quality and increase the fresh fragrance of pork.

[0033] Sweet potatoes are one of the important traditional crops in China. As an excellent energy feed raw material for pigs, every 100g of dry sweet potatoes contains 338 kcal of energy and 83.9g of carbohydrates. The corresponding indicators for corn are 336 kcal and 74.7 grams. The pig feed prepared by using sweet potatoes and sweet potato starch instead of corn as the main raw material for pigs has better nutritional components and feeding effects.

[0034] Maggot: The larva of a fly, which is a high-quality animal protein feed. The crude protein content of dried maggot powder reaches more than 60%, and it contains 17 kinds of amino acids. The contents of essential amino acids such as methionine, lysine, arginine, glutamic acid, linoleic acid and linolenic acid are all higher than those of fish meal. It also contains rich trace elements such as copper, zinc, iron, manganese, cobalt, selenium, iodine, etc. Moreover, maggots also contain antibacterial peptides, chitin, lectins and a variety of growth-promoting factors and flavor factors. The pig feed prepared by using maggots instead of soybean meal and rapeseed meal can greatly improve the body immunity, growth rate and meat quality flavor of pigs.

[0035] Wheat sprouts: Supplement various vitamins for pigs and play an important role in improving meat quality.

[0036] Rice bran: Rich in cellulose, it can increase intestinal peristalsis and help digestion and absorption.

[0037] Astragalus membranaceus: Tonifying qi to lift yang, benefiting qi and strengthening the exterior, promoting diuresis to alleviate edema, generating essence and nourishing blood. Its main effects are enhancing immunity, antiviral, antioxidant, promoting hematopoiesis, expanding peripheral blood vessels, improving microcirculation in the body, lowering blood pressure, promoting metabolism, etc.

[0038] Angelica sinensis: Nourishing blood and promoting blood circulation, regulating menstruation and relieving pain, moistening the intestines and relaxing bowel movements. Its effects include enhancing immunity, promoting growth, improving feed conversion rate, improving digestive system function and reducing diarrhea rate.

[0039] Isatis indigotica: Clearing heat and detoxifying, cooling blood and relieving sore throat. Its effects include antibacterial, anti-inflammatory, antipyretic and antiviral.

[0040] Eucommia ulmoides: Tonifying the liver and kidney, strengthening tendons and bones, calming the fetus and soothing the nerves. Its effects include lowering blood pressure, enhancing immunity, promoting growth, analgesic, sedative, anti-inflammatory, diuretic, and can improve meat quality.

[0041] Zingiber officinale Rosc. var. purpureum Stapf: Lowering blood lipid and promoting bile secretion. Its effects include significantly enhancing the immunity of pigs, supplementing various trace elements and vitamins, promoting muscle and bone development, antioxidant and anti-inflammatory, preventing common respiratory and intestinal diseases of pigs, reducing the generation of free radicals in the body, and improving the quality and taste of pork.

[0042] Tangerine Peel: Regulates qi and strengthens the spleen, dries dampness and resolves phlegm. Its effects include regulating gastrointestinal motility, promoting gastric juice secretion, anti-ulcer, liver protection, choleresis, anti-allergy, lipid-lowering, anti-platelet aggregation, antioxidant, expectorant, anti-asthmatic, antibacterial, anti-tumor, etc., and can increase the fragrant flavor of pork.

[0043] Betaine: Lowers blood pressure, has antioxidant properties, bactericidal and anti-inflammatory effects, promotes fat metabolism, and promotes gastrointestinal peristalsis. Its strongest effect is to improve carcass quality, reduce backfat thickness, increase lean meat percentage and intramuscular fatty acid content, and improve pork quality. Research shows that adding betaine can significantly increase the lean meat percentage of pigs' carcasses, the area of the longissimus dorsi muscle, and the marbling score, and improve the tenderness and taste of the meat.

[0044] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, the raw materials are commercially available products.

[0045] Example 1

[0046] A microbial feed, by weight, comprises the following components:

[0047] 62 parts of cooked sweet potato starch slurry, 25 parts of fly maggot powder, 10 parts of microbial fermentation material, 0.5 part of Chinese herbal medicine compound, 0.5 part of salt, and 2 parts of bone meal. (This microbial feed is suitable for feeding piglets weighing 10 - 30 kg.)

[0048] The preparation method of the cooked sweet potato starch slurry is as follows:

[0049] S1: In a solar greenhouse, use steel pipes with a diameter of 0.05 m as columns to build a planting rack with a height of 4 m, a width of 2 m, and a length of 12 m, and divide it into 8 layers of planting platforms, each layer of planting platform with a height of 0.5 m;

[0050] S2: After building the planting rack, install an integrated water and fertilizer automatic drip irrigation system at the top of each planting platform, and use the pig urine water generated in pig breeding and treated by fermentation to supplement the water and fertilizer required during the growth period of sweet potatoes;

[0051] S3: Put 30 kg of planting substrate into planting bags with a diameter of 0.5 m and a height of 0.4 m. After planting 2 sweet potato seedlings horizontally in each planting bag at an interval of 0.2 m, neatly arrange them on the planting platform; among them, the planting substrate is a mixture of the cultivation material after breeding fly maggots, rice husk powder, and soil in a weight ratio of 1:1:4.

[0052] S4: According to the technical management method of sweet potatoes, the temperature and humidity in the greenhouse are adjusted, the light is supplemented with plant fill lights, and various management tasks such as water and fertilizer are done well. Five seasons of sweet potatoes can be harvested in two years; the harvested sweet potatoes are crushed with a sweet potato crusher, and the cooked sweet potato powder is steamed for later use; the weight of the cooked sweet potato powder is measured based on the weight of dry sweet potatoes, and 1 jin of dry sweet potatoes is approximately equal to 3 jin of fresh sweet potatoes.

[0053] The microbial fermentation material comprises the following components in parts by weight: 30 parts of wheat sprout pulp, 25 parts of fly maggot pulp, 20 parts of rice bran, and 35 parts of dehydrated sweet potato starch.

[0054] The preparation method of the wheat sprout slurry is as follows: the cleaned wheat seeds are soaked in 30°C warm water for 2 hours, and then placed in a seedling tray, sprayed with water 5-8 times a day, and cultivated for 15 days. When the wheat sprouts grow to 15-20 cm in height, they are harvested, and wheat sprout slurry is prepared by a pulping machine for later use;

[0055] The preparation method of the fly maggot slurry is as follows: 20g of fly maggot eggs are added to every 100kg of cultivation material for cultivation for 4 days, the fly maggots are separated, and the maggots are soaked in 100℃ hot water for 20 minutes for disinfection and sterilization, and then ground into slurry with a pulping machine for later use; the cultivation material is: 50kg of sweet potato residue and 50kg of pig manure after dry-wet separation are mixed, and 5kg of Vitality 99 fermentation liquid is added and stirred evenly, and the mixture is sealed and fermented at room temperature of 25-30℃ for 72h to prepare the cultivation material;

[0056] The preparation method of the dehydrated sweet potato starch is as follows: the method for preparing the cooked sweet potato slurry is followed, except that after the sweet potatoes are harvested, a sweet potato starch processing machine is used to prepare the sweet potato starch for later use.

[0057] The preparation method of the microbial fermentation material is as follows: wheat sprout pulp, fly maggot pulp, rice bran, and sweet potato dehydrated starch are measured by weight, and then 5 jin of 99 vitality fermentation liquid is added and stirred evenly, the water content is adjusted to 65% with 40° C. warm water, and the fermentation is sealed at 25° C. room temperature for 72 hours for use.

[0058] The preparation method of the fly maggot powder is as follows: first, put 20g of fly maggot eggs into the culture material (taking 100 jin as an example) and culture for 4 days, separate the fly maggots, soak them in 100℃ hot water for 20 minutes for disinfection and sterilization, then use a dryer to dry them at 60℃ for 8h, grind them into powder for later use; the culture material is: 50 jin of sweet potato residue and 50 jin of pig manure after dry-wet separation are mixed, and then 5 jin of Vitality 99 fermentation liquid is added and stirred evenly, and sealed and fermented at room temperature of 25-30℃ for 72 hours to make the culture material.

[0059] The Chinese herbal compound comprises the following components in parts by weight: 50 parts of astragalus, 2 parts of angelica, 20 parts of isatis root, 30 parts of eucommia, 140 parts of turmeric, 150 parts of tangerine peel, and 100 parts of betaine; and the preparation method of the Chinese herbal compound is: weigh the raw materials according to the weight ratio, mix them evenly, and then crush them for later use.

[0060] The preparation method of the microbial feed is as follows: weigh the cooked sweet potato powder, the maggot powder, the microbial fermentation material, the Chinese herbal medicine compound, the salt, and the bone meal according to the above weight ratio, then add warm water with a temperature of 35-40°C, and seal and ferment for 24 hours; based on the weight of 100 parts of the microbial feed, the amount of warm water used is 200 parts.

[0061] Example 2

[0062] The method of Example 1 is followed, except that:

[0063] The microbial feed comprises the following components in parts by weight:

[0064] 52 parts of cooked sweet potato starch, 20 parts of fly maggot powder, 25 parts of microbial fermentation feed, 0.7 parts of Chinese herbal medicine compound, 0.5 parts of salt, and 1.8 parts of bone meal. (The microbial feed is suitable for feeding medium-sized pigs weighing 30 to 60 kilograms)

[0065] In the method for preparing the cooked sweet potato slurry, in step S1, in a solar greenhouse, a steel pipe with a diameter of 0.05m is used as a pillar to build a planting frame with a height of 5m, a width of 1.8m, and a length of 15m, and the frame is divided into 10 layers of planting platforms, each layer of which is 0.5m high; in step S3, 25 kg of planting substrate is loaded into a planting bag with a diameter of 0.45m and a height of 0.4m, and two sweet potato seedlings are planted in each planting bag at a spacing of 0.2m, and the seedlings are neatly arranged on the planting platform; wherein the planting substrate is a cultivation material after cultivating fly maggots, husk powder, and soil in a weight ratio of 1.2:1.2:4;

[0066] The microbial fermentation material comprises the following components by weight: 25 parts of wheat sprout pulp, 30 parts of fly maggot pulp, 15 parts of rice bran, and 30 parts of dehydrated sweet potato starch;

[0067] The remaining steps and parameters are the same as in Example 1.

[0068] Example 3

[0069] The method of Example 1 is followed, except that:

[0070] The microbial feed comprises the following components in parts by weight:

[0071] 42 parts of cooked sweet potato starch slurry, 15 parts of fly maggot powder, 40 parts of microbial fermentation material, 1 part of Chinese herbal medicine compound, 0.5 part of salt, 1.5 parts of bone meal. (The microbial feed is suitable for feeding big pigs weighing 60 - 110 kg or more)

[0072] The preparation method of the cooked sweet potato starch slurry. In step S1, in a solar greenhouse, use steel pipes with a diameter of 0.05 m as columns to build a planting rack with a height of 3 m, a width of 1.6 m, and a length of 20 m, and divide it into 6 planting platforms, each planting platform with a height of 0.5 m; In step S3, put 20 kg of planting substrate into a diameter of 0.4, and after planting 2 sweet potatoes at a plant spacing of 0.15 m, place them neatly on the planting platform. The planting substrate is the cultivation material after breeding fly maggots, rice husk powder, and soil with a weight content ratio of 1.5:1.5:4;

[0073] The microbial fermentation material, by weight, includes the following components: 30 parts of wheat sprout slurry, 25 parts of fly maggot slurry, 20 parts of rice bran, 25 parts of dehydrated sweet potato starch;

[0074] The remaining steps and parameters are the same as those in Example 1.

[0075] Comparative Example 1

[0076] Compared with Example 1, the feed commonly used by pig breeding enterprises in the stage of piglets weighing 10 - 30 kg is formulated by weight as follows: 66 parts of corn, 25 parts of soybean meal, 5 parts of wheat bran, 4 parts of piglet commercial premix;

[0077] Comparative Example 2

[0078] Compared with Example 2, the feed commonly used by pig breeding enterprises in the stage of medium pigs weighing 30 - 60 kg is formulated by weight as follows: 66 parts of corn, 20 parts of soybean meal, 10 parts of wheat bran, medium pig commercial premix;

[0079] Comparative Example 3

[0080] Compared with Example 3, the feed commonly used by pig breeding enterprises in the stage of big pigs weighing 60 - 110 kg is formulated by weight as follows: 66 parts of corn, 15 parts of soybean meal, 15 parts of wheat bran, 4 parts of big pig commercial premix;

[0081] Test Example

[0082] Detect the feed components prepared in the above examples and comparative examples, and the results are shown in Table 1.

[0083] Table 1

[0084] Number Crude protein content (%) Digestible energy (Mcal) Lysine (%) Methionine + cystine (%) Example 1 17.5 3.18 2.54 1.12 Example 2 15.8 2.85 2.15 0.91 Example 3 14.3 2.64 1.73 0.65 Comparative Example 1 16.4 2.29 0.72 0.38 Comparative Example 2 14.5 2.12 0.55 0.29 Comparative Example 3 12.3 1.97 0..41 0.22

[0085] As can be seen from the results in Table 1, the microbial feed prepared according to the embodiments of the present invention has significantly better nutritional components than the comparative examples.

[0086] Livestock test situation 1:

[0087] A breeding test was carried out in Ganxi Pig Farm, Baojing County, Hunan Province. 200 healthy piglets weighing 10±1 kg were selected and randomly divided into 2 groups, denoted as the experimental group and the comparative example group. The test time was 120 days, and the management was carried out according to the same daily pig farm management. The results are shown in Table 2.

[0088] Among them, in the experimental group: in the piglet stage (10 - 30 kg), the microbial feed obtained in Example 1 above was fed; in the medium pig stage (30 - 60 kg), the microbial feed obtained in Example 2 above was fed; in the big pig stage (60 - 110 kg and above), the microbial feed obtained in Example 3 above was fed;

[0089] In the comparative example group: in the piglet stage (10 - 30 kg), the feed obtained in Comparative Example 1 above was fed; in the medium pig stage (30 - 60 kg), the feed obtained in Comparative Example 2 above was fed; in the big pig stage (60 - 110 kg and above), the feed obtained in Comparative Example 3 above was fed.

[0090] Table 2

[0091]

[0092]

[0093] As can be seen from the results in Table 2, the microbial feed prepared according to the embodiments of the present invention has a larger feed intake, a higher daily weight gain, a lower mortality rate, and a lower feed cost, has no drug residues, the live pigs fed can meet the green food standards, and the meat has a delicate texture and a fresh flavor.

[0094] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A microbial feed, characterized in that: The microbial feed comprises the following components by weight: 10-70 parts of cooked sweet potato starch, 10-50 parts of microbial fermentation material, 0.2-1 part of Chinese herbal compound, 0.5-2 parts of salt, and 0.5-2 parts of bone meal.

2. The microbial feed according to claim 1, characterized in that: The microbial feed also includes fly maggot powder; The microbial feed comprises the following components in parts by weight: 43-63 parts of cooked sweet potato starch, 5-25 parts of fly maggot powder, 10-40 parts of microbial fermentation material, 0.2-1 part of Chinese herbal medicine compound, 0.1-0.8 part of salt, and 0.5-1.8 parts of bone meal.

3. The microbial feed according to claim 1 or 2, characterized in that: The preparation method of the cooked sweet potato slurry is as follows: S1: In the solar greenhouse, use steel pipes or bamboo as pillars to build a planting rack with a height of 3 to 6 meters, a width of 1 to 3 meters, and a length of 5 to 1000 meters, and divide it into 3 to 10 layers of planting platforms, with each layer being 0.3 to 2 meters high; S2: After the planting rack is built, an integrated water and fertilizer automatic drip irrigation system is installed on the upper part of the planting platform to facilitate the water produced in pig farming to be fermented and added with appropriate amounts of nutrients to supplement the water and fertilizer required during the growth period of sweet potatoes; S3: putting the planting substrate into a planting bag with a diameter of 0.2 to 0.8 m and a height of 0.2 to 0.8 m, and planting the sweet potato seedlings into the planting bag, and placing it on a planting table; S4: Carry out daily management according to the same management methods as sweet potato field planting, and adjust the temperature and light in the greenhouse according to the different growth stages of sweet potatoes. 2 to 3 crops of sweet potatoes can be planted a year, and the planted sweet potatoes are ground into powder with a grinder.

4. The microbial feed according to claim 3, characterized in that: In step S3, the planting matrix is ​​a mixture of fly maggot-cultivated material, rice husk powder and soil in a weight content ratio of 1 to 2: 1 to 2: 3 to 7.

5. The microbial feed according to claim 1 or 2, characterized in that: The preparation method of the fly maggot powder is as follows: first, fly maggot eggs are placed in the culture material for cultivation, the fly maggots are separated, and they are soaked in 100°C water for 10 minutes for disinfection and sterilization, and then dried in a dryer, ground into powder for later use; the culture material is made by mixing sweet potato residue and pig manure after dry-wet separation, adding Vitality 99 fermentation liquid, stirring evenly, and sealing and fermenting at room temperature of 25-30°C for 72 hours.

6. The microbial feed according to claim 1 or 2, characterized in that: The microbial fermentation material comprises the following components by weight: 5-40 parts of wheat sprout pulp, 1-30 parts of fly maggot pulp, 5-20 parts of rice bran, 1-50 parts of sweet potato dehydrated starch, and 0.2-2 parts of Chinese herbal medicine compound; The preparation method of the microbial fermentation material includes: weighing raw materials according to the weight ratio, adding 99-vitamin fermentation liquid, stirring evenly, adjusting the water content to 60-65% at 40°C, and sealing and fermenting at 22°C for 72 hours.

7. The microbial feed according to claim 6, characterized in that: In the microbial fermentation material, the preparation method of the fly maggot slurry is as follows: put 20g of fly maggot eggs into 100jin of culture material and cultivate for 4 days, separate the fly maggots, disinfect and sterilize the separated fly maggots, and then grind them into slurry with a pulper; the culture material is sweet potato residue and pig manure with a weight ratio of 1:1, add 5jin of 99 vitality fermentation liquid, stir evenly, and seal and ferment for 72h.

8. The microbial feed according to claim 1 or 2, characterized in that: The Chinese herbal medicine compound comprises the following components by weight: 20-100 parts of astragalus, 1-5 parts of angelica, 10-50 parts of isatis root, 10-50 parts of eucommia, 100-200 parts of turmeric, 100-200 parts of tangerine peel and 50-150 parts of betaine.

9. A method for preparing the microbial feed according to any one of claims 1 to 8, characterized in that: The method comprises: weighing the raw materials according to the above weight ratio, adding warm water with a temperature of 35-40°C, and sealing and fermenting for 12-24 hours; based on the weight of 100 parts of the microbial feed, the amount of the warm water is 150-250 parts.

10. Use of the microbial feed according to any one of claims 1 to 8 in pig farming.

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