A breeding method for improving the growth performance of weaned piglets

Abstract

The application provides a breeding method for improving the growth performance of weaned piglets, comprising the following steps: S1. food seeking training, S2. gradual weaning, S3. dry-wet two-tank transition feeding, S4. feed management, S5. drinking water management, S6. environment management, S7. disinfection management, S8. disease prevention, and S9. completion of the weaned piglet stage. The food seeking training makes the piglets familiar with the smell and taste of the feed, laying a foundation for subsequent feeding. The gradual weaning avoids the strong psychological stress caused by sudden weaning. The dry-wet two-tank transition feeding gradually reduces the feed-to-water ratio of wet feed and reduces the wet feed feeding frequency, so that the piglets gradually feed dry feed independently, and the stress response is reduced. Through drinking water management, environment management, disinfection management and disease prevention, the piglets are supplemented with trace elements and vitamins, provided with suitable temperature and healthy and safe environment, and effectively prevented from diseases, so that the piglets achieve high average daily gain, low feed-to-gain ratio and low diarrhea rate, and the growth performance of the weaned piglets is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of breeding, in particular to a breeding method for improving the growth performance of weaned piglets. BACKGROUND

[0002] Pig breeding plays an important role in agricultural production and is the main source of meat supply, which is of great significance to food safety, meeting people's living needs and promoting rural economic development. Piglet breeding, as the starting stage of pig breeding, is crucial to the success of the entire breeding process. The healthy growth and good development of piglets are directly related to the growth rate, meat quality and breeding efficiency of subsequent pigs. Therefore, piglet breeding is of great significance to pig breeding. However, after weaning, existing piglets are prone to diarrhea, weight loss, slow growth and other problems due to changes in physiology, environment and management, etc. These problems not only affect the healthy growth of piglets, but also increase the cost and risk of breeding. In addition, there are many challenges in environmental control, feed nutrition, disease prevention and control, etc. in weaned piglet breeding, which need to be continuously explored and improved. Therefore, strengthening the research and management of weaned piglet breeding technology and improving the growth performance of weaned piglets are urgent problems in current pig breeding. SUMMARY

[0003] In view of this, the present application provides a breeding method for improving the growth performance of weaned piglets to solve the above problems.

[0004] The technical scheme of the present application is implemented as follows: a breeding method for improving the growth performance of weaned piglets, comprising the following steps:

[0005] S1. Food induction training: while breastfeeding, smear the teat of 5-7 day old piglets with teaching trough feed, 2-3 times a day, 5-10g each time. For 8-14 day old piglets, while breastfeeding, feed 50-100g per piglet per day, 4-6 times a day. For 15-21 day old piglets, while breastfeeding, feed 100-200g per piglet per day, 3-5 times a day. For 22-27 day old piglets, while breastfeeding, feed 200-300g per piglet per day, 2-4 times a day.

[0006] S2. Gradual weaning: 4-6 days before weaning, the frequency of breastfeeding is 3-5 times, 2-3 days before weaning, the frequency of breastfeeding is 2-3 times, 1 day before weaning, the frequency of breastfeeding is 1-2 times, only during the breastfeeding period, the sow and piglets are kept together, and the sow is transferred to other pig houses during other time periods. Weaning is performed when the piglets are 28 days old and the body weight is 6-7Kg.

[0007] S3. Dry-wet trough transition feeding: The weaning is carried out at 9-10 o'clock on the first day of weaning. At 13-14 o'clock, 4.0-6.0 times of pure water is added to the starter to configure the wet feed, which is placed in the wet feed trough to feed the first time. At 17-18 o'clock, the wet feed is configured according to the above method to feed the second time. At 21-22 o'clock, the wet feed is configured according to the above method to feed the third time. During this period, the starter is added to the dry feed trough and the starter is kept uninterrupted. On the second to third day of weaning, the wet feed is fed 4 times, at 6-7 o'clock, 11-12 o'clock, 16-17 o'clock, and 21-22 o'clock, respectively. During this period, the starter is added to the dry feed trough and the starter is kept uninterrupted. On the fourth to fifth day of weaning, 2.5-3.5 times of pure water is added to the starter to configure the wet feed, which is fed 3 times at 6-7 o'clock, 14-15 o'clock, and 21-22 o'clock, respectively. During this period, the starter is added to the dry feed trough and the starter is kept uninterrupted. On the sixth to seventh day of weaning, 1.0-2.0 times of pure water is added to the starter to configure the wet feed, which is fed 2 times at 11-12 o'clock and 16-17 o'clock, respectively. During this period, the starter is added to the dry feed trough and the starter is kept uninterrupted.

[0008] S4. Feed management: On the eighth to thirteenth day of weaning, the starter and the nursery feed I are fed, and the mass ratio of the starter to the nursery feed I is (4-8):1 at the beginning, and then the starter is reduced by 15-20% per day, and the nursery feed I is increased accordingly. On the fourteenth to twenty-fourth day of weaning, the nursery feed I and the nursery feed II are fed, and the mass ratio of the nursery feed I to the nursery feed II is (8-10):1 at the beginning, and then the nursery feed I is reduced by 10-15% per day, and the nursery feed II is increased accordingly. On the twenty-fifth to fortieth day of weaning, the nursery feed II and the nursery feed III are fed, and the mass ratio of the nursery feed II to the nursery feed III is (4-6):1 at the beginning, and then the nursery feed II is reduced by 10-15% per day, and the nursery feed III is increased accordingly.

[0009] S5. Water management: Warm water is fed within 15 days of weaning, and then normal temperature water is fed. Glucose, electrolytes, complex minerals, and complex vitamins are added to the water.

[0010] S6. Environmental management: The temperature in the pig house is set to 23-25°C within 15 days of weaning. The temperature in the pig house is set to 20-23°C thereafter. The humidity in the pig house is set to 65-75%, and the pig house is kept well ventilated and well lit. The pig house is cleaned once in the morning and once in the afternoon every day.

[0011] S7. Disinfection management: One of potassium permanganate solution, sodium hydroxide solution, and benzalkonium bromide solution is used for disinfection every week. After 2-4 hours of disinfection, lactic acid bacteria diluent is sprayed in the pig house.

[0012] S8. Disease prevention: 13-15 day old piglets, inoculated with circovirus vaccine. 18-20 day old piglets, inoculated with swine fever vaccine. 23-25 day old piglets, inoculated with pseudorabies vaccine. 7-8 days after weaning, inoculated with the second dose of swine fever vaccine. 15-17 days after weaning, inoculated with foot-and-mouth disease vaccine.

[0013] S9. Weaned piglet stage completion: weaned piglets are transferred to a fattening room or sold from the 41st day of weaning, ending the weaned piglet breeding stage.

[0014] Further, the starter feed includes the following raw materials by weight: 20-30 parts of fish meal, 30-40 parts of whey powder, 2-5 parts of acidifying agent, 1-3 parts of intestinal conditioner, 0.5-1.5 parts of Chinese herbal medicine enzyme.

[0015] Further, the acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of (1-3):(2-4):(0.5-1.5):(1-3).

[0016] Further, the intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of (2-4):(1-3):(2-4):(0.3-0.5).

[0017] Further, the Chinese herbal medicine enzyme is prepared by the following method: mix and crush Astragalus, honeysuckle, alfalfa, wormwood, plantain, and gentian grass to 5-15 mm, add a compound bacteria composed of yeast, lactic acid bacteria, and Aspergillus oryzae in a mass ratio of (1-2):(1.0-1.5):(0.5-1.0), seal and ferment at 30-35℃ for 48-60h, filter with a 100-200 mesh filter screen, take the filtrate, and then spray dry to obtain the herbal medicine enzyme.

[0018] Further, the weight of the wet feed configured at a time in S3 is 400-600g.

[0019] Further, the starter feed I includes the following raw materials by weight: 10-20 parts of fish meal, 20-30 parts of puffed bean powder, 2-4 parts of acidifying agent, 1-2 parts of intestinal conditioner, 0.5-1.0 parts of bacteria enzyme complex agent, and 1-2 parts of Chinese herbal medicine enzyme. The starter feed II includes the following raw materials by weight: 5-15 parts of fish meal, 30-40 parts of soybean meal, 2-4 parts of acidifying agent, 1-3 parts of intestinal conditioner, 1.0-1.5 parts of bacteria enzyme complex agent, and 1-3 parts of Chinese herbal medicine enzyme. The starter feed III includes the following raw materials by weight: 20-30 parts of soybean meal, 30-40 parts of corn meal, 5-10 parts of full-fat soybean meal, 5-10 parts of wheat bran, 1-3 parts of acidifying agent, 0.5-2.0 parts of intestinal conditioner, 0.5-1.5 parts of bacteria enzyme complex agent, and 2-4 parts of Chinese herbal medicine enzyme.

[0020] Further, the bacteria enzyme complex agent is composed of lactic acid bacteria, bacillus subtilis, yeast, protease and cellulase. 8 The activity of the lactic acid bacteria, bacillus subtilis and yeast is greater than or equal to 1*10 7 U / kg, the activity of the protease is greater than or equal to 2*10 6 U / kg, and the activity of the cellulase is greater than or equal to 2*10

[0021] Further, the mass / volume ratio of glucose, electrolyte, complex mineral substance, complex vitamin and water in S5 is (1.0-1.5):(0.4-0.6):(0.1-0.2):(0.2-0.4):(90-110), the complex mineral substance is composed of iron sulfate, copper sulfate, magnesium sulfate and zinc sulfate with a mass ratio of (0.8-1.2):(0.4-0.6):(1.5-2.5):(0.4-0.6), and the complex vitamin is composed of vitamin A, vitamin B and vitamin C with a mass ratio of (3-5):(1.0-1.5):(1.0-1.5).

[0022] Further, the concentration of potassium permanganate solution in S7 is 0.05-0.08wt%, the concentration of sodium hydroxide solution is 2-4wt%, and the concentration of benzalkonium bromide solution is 0.1-0.2wt%. The lactic acid bacteria diluent is composed of lactic acid bacteria and pure water with a mass / volume ratio g / mL of (1-2):1000, and the activity of the lactic acid bacteria is greater than or equal to 1*10 8 CFU / g.

[0023] Compared with the prior art, the present application has the beneficial effects that: the present application helps the piglets to be familiar with the smell and taste of feed through the bait training, and lays a foundation for subsequent feeding. The strong psychological stress caused by sudden weaning is avoided through gradual weaning. The feed / water ratio of wet feed is gradually reduced and the feeding frequency of wet feed is reduced through dry-wet two-tank transitional feeding, so that the piglets gradually feed dry feed independently and reduce the stress response. Through water management, environmental management, disinfection management and disease prevention, the piglets are supplemented with trace elements and vitamins, provided with suitable temperature and healthy and safe environment, and effectively prevented from diseases. The piglets can achieve high average daily gain, low feed / gain ratio and low diarrhea rate through the synergistic effect of the steps, and the growth of weaned piglets is improved.

[0024] The present application adds the acidifier composed of ketoglutaric acid, gluconic acid, formic acid and lactic acid in the teaching trough feed and the nursery feed, forms a stable acid barrier, adjusts the pH value of the gastrointestinal tract, promotes nutrient absorption, enhances immune function and promotes intestinal health, and the performance of the acidifier is improved through the above-mentioned ways, so that better guarantee is provided for the growth of the piglets.

[0025] The present application improves the intestinal morphology of piglets, increases the intestinal villus height and reduces the crypt depth by adding intestinal regulator in the starter feed and the nursery feed. The increase of the intestinal villus height increases the absorption area, thereby improving the absorption efficiency of the piglets to the nutrient substances, thereby promoting the weight increase and reducing the feed conversion ratio. The shallow crypt is helpful for the secretion of digestive juice and the absorption of nutrient substances, is helpful for maintaining the stability of the intestinal environment and reducing the accumulation of harmful substances, thereby reducing the incidence of diarrhea. DETAILED DESCRIPTION

[0026] In order to better understand the technical content of the present application, the following specific examples are provided to further illustrate the present application.

[0027] The experimental methods used in the embodiments of the present application are all conventional methods unless otherwise specified.

[0028] The materials, reagents and the like used in the embodiments of the present application can be obtained from commercial channels unless otherwise specified.

[0029] Example 1

[0030] A breeding method for improving the growth of weaned piglets, comprising the following steps:

[0031] S1. Food induction training: while being fed with milk, the starter feed is smeared on the mouth of the piglets at the age of 5-7 days, 5g is smeared for each time, 2 times a day. For the piglets at the age of 8-14 days, while being fed with milk, 50g of feed is fed for each piglet per day, 4 times a day. For the piglets at the age of 15-21 days, while being fed with milk, 100g of feed is fed for each piglet per day, 3 times a day. For the piglets at the age of 22-27 days, while being fed with milk, 200g of feed is fed for each piglet per day, 2 times a day.

[0032] S2. Gradual weaning: 4-6 days before weaning, the frequency of nursing is 3 times, 2-3 days before weaning, the frequency of nursing is 2 times, 1 day before weaning, the frequency of nursing is 1 time, only during the nursing period, the sow and the piglets are kept together, and the sow is transferred to other pig house during other time periods. The piglets are weaned when they are 28 days old and the weight is 6Kg.

[0033] S3. Dry-wet trough transition feeding: The weaning was carried out at 9 o'clock on the first day of weaning. At 13 o'clock, 4.0 times of pure water was added to the starter to configure the wet feed, which was placed in the wet feed trough to feed the first time. At 17 o'clock, the wet feed was configured according to the above method to feed the second time. At 21 o'clock, the wet feed was configured according to the above method to feed the third time. During this period, the starter was added to the dry feed trough and the starter was kept uninterrupted. On the second to third day of weaning, the wet feed was fed 4 times at 6 o'clock, 11 o'clock, 16 o'clock and 21 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. On the fourth day of weaning, 2.5 times of pure water was added to the starter to configure the wet feed, which was fed 3 times at 6 o'clock, 14 o'clock and 21 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. On the sixth day of weaning, 1.0 times of pure water was added to the starter to configure the wet feed, which was fed 2 times at 11 o'clock and 16 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. The weight of the wet feed configured at a time was 400g.

[0034] S4. Feed management: On the eighth to thirteenth day of weaning, the starter and the nursery feed I were fed, and the mass ratio of the starter to the nursery feed I was 4:1 initially, and then the starter was reduced by 15% per day, and the nursery feed I was increased accordingly. On the fourteenth to twenty-fourth day of weaning, the nursery feed I and the nursery feed II were fed, and the mass ratio of the nursery feed I to the nursery feed II was 8:1 initially, and then the nursery feed I was reduced by 10% per day, and the nursery feed II was increased accordingly. On the twenty-fifth to fortieth day of weaning, the nursery feed II and the nursery feed III were fed, and the mass ratio of the nursery feed II to the nursery feed III was 4:1 initially, and then the nursery feed II was reduced by 10% per day, and the nursery feed III was increased accordingly.

[0035] S5. Water management: Within 15 days of weaning, warm water was fed, and then normal temperature water was fed. Water was added with glucose, electrolyte, compound mineral, and compound vitamin. The mass-volume ratio of glucose, electrolyte, compound mineral, compound vitamin, and water was 1.0:0.4:0.1:0.2:90. The compound mineral was composed of iron sulfate, copper sulfate, magnesium sulfate, and zinc sulfate with a mass ratio of 0.8:0.4:1.5:0.4. The compound vitamin was composed of vitamin A, vitamin B, and vitamin C with a mass ratio of 3:1.0:1.0.

[0036] S6. Environmental management: Within 15 days of weaning, the temperature of the pig house was set to 23℃. Subsequently, the temperature of the pig house was set to 20℃. The humidity of the pig house was set to 65%, and the pig house was kept well ventilated and well lit. The pig house was cleaned once in the morning and once in the afternoon every day.

[0037] S7. Disinfection management: disinfect with potassium permanganate solution every week. Spray lactic acid bacteria diluent in the pig house 2h after disinfection. The concentration of potassium permanganate solution is 0.05wt%. The lactic acid bacteria diluent is composed of lactic acid bacteria and pure water with a mass-volume ratio of 1:1000, and the lactic acid bacteria has a viable count of 1×10 8 CFU / g.

[0038] S8. Disease prevention: vaccinate 13-day-old piglets with porcine circovirus vaccine. Vaccinate 18-day-old piglets with swine fever vaccine. Vaccinate 23-day-old piglets with attenuated pseudorabies vaccine. Vaccinate the second dose of swine fever vaccine on the 7th day after weaning. Vaccinate the foot-and-mouth vaccine on the 15th day after weaning.

[0039] S9. Finish the weaned piglet stage: start to transfer piglets to the fattening room on the 41st day after weaning, and end the weaned piglet breeding stage.

[0040] The starter feed includes the following raw materials in parts by weight: 20 parts of fish meal, 30 parts of whey powder, 2 parts of acidifying agent, 1 part of intestinal conditioner, and 0.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 1:2:0.5:1. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 2:1:2:0.3. The Chinese herbal medicine enzyme is prepared by the following method: mix and crush radix angelicae sinensis, honeysuckle, sophora, artemisia, plantain, and gentian to 5mm, add complex bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 1.0:1.0:0.5, seal and ferment at 30℃ for 60h, filter with a 100-mesh filter screen, take the filtrate, and then spray dry to obtain the herbal medicine enzyme.

[0041] The starter feed includes the following raw materials in parts by weight: 20 parts of fish meal, 30 parts of whey powder, 2 parts of acidifying agent, 1 part of intestinal conditioner, and 0.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 1:2:0.5:1. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 2:1:2:0.3. The Chinese herbal medicine enzyme is prepared by the following method: mix and crush radix angelicae sinensis, honeysuckle, sophora, artemisia, plantain, and gentian to 5mm, add complex bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 1.0:1.0:0.5, seal and ferment at 30℃ for 60h, filter with a 100-mesh filter screen, take the filtrate, and then spray dry to obtain the herbal medicine enzyme. 8 CFU / g, the protease activity is 2×10 7 U / kg, and the cellulase activity is 2×10 6 U / kg.

[0042] Example 2

[0043] A breeding method for improving the growth of weaned piglets, comprising the following steps:

[0044] S1. Food-seeking training: while being breastfed, the teat of a 5-7 day old piglet is smeared with 8g of training trough feed 3 times a day. For 8-14 day old piglets, while being breastfed, 75g of feed is fed 5 times a day per piglet. For 15-21 day old piglets, while being breastfed, 160g of feed is fed 4 times a day per piglet. For 22-27 day old piglets, while being breastfed, 240g of feed is fed 3 times a day per piglet.

[0045] S2. Gradual weaning: 4-6 days before weaning, the frequency of breastfeeding is 4 times, 2-3 days before weaning, the frequency of breastfeeding is 2 times, 1 day before weaning, the frequency of breastfeeding is 1 time, only during breastfeeding, the sow and piglets are kept together, and the sow is transferred to other pig houses during other periods. The piglets are weaned at 28 days of age and a body weight of 6.5 Kg.

[0046] S3. Dry-wet trough transition feeding: on the first day of weaning, weaning is performed at 9:30. At 13:30, 5.0 times pure water is added to the training trough feed to configure wet feed, which is placed in the wet feed trough for the first wet feed feeding. At 17:30, wet feed is configured according to the above wet feed configuration method for the second wet feed feeding. At 21:30, wet feed is configured according to the above wet feed configuration method for the third wet feed feeding. During this period, training trough feed is added to the dry feed trough and the training trough feed is kept uninterrupted. On the second and third days of weaning, wet feed is fed 4 times at 6:30, 11:30, 16:30 and 21:30, respectively, and during this period, training trough feed is added to the dry feed trough and the training trough feed is kept uninterrupted. On the fourth and fifth days of weaning, 3.0 times pure water is added to the training trough feed to configure wet feed, which is fed 3 times at 6:30, 14:30 and 21:30, respectively, and during this period, training trough feed is added to the dry feed trough and the training trough feed is kept uninterrupted. On the sixth and seventh days of weaning, 1.5 times pure water is added to the training trough feed to configure wet feed, which is fed 2 times at 11:30 and 16:30, respectively, and during this period, training trough feed is added to the dry feed trough and the training trough feed is kept uninterrupted. The weight of the wet feed configured at a time is 500g.

[0047] S4. Feed management: on the eighth to thirteenth day of weaning, training trough feed and nursery feed I are fed, and the mass ratio of training trough feed to nursery feed I is 6:1 initially, and then the training trough feed is reduced by 18% per day, and the nursery feed I is increased accordingly. On the fourteenth to twenty-fourth day of weaning, nursery feed I and nursery feed II are fed, and the mass ratio of nursery feed I to nursery feed II is 9:1 initially, and then the nursery feed I is reduced by 12% per day, and the nursery feed II is increased accordingly. On the twenty-fifth to fortieth day of weaning, nursery feed II and nursery feed III are fed, and the mass ratio of nursery feed II to nursery feed III is 5:1 initially, and then the nursery feed II is reduced by 12% per day, and the nursery feed III is increased accordingly.

[0048] S5. Drinking water management: within 15 days of weaning, feeding warm water, and subsequent feeding normal temperature water. Adding glucose, electrolyte, compound mineral, and compound vitamin in water. The mass-volume ratio of glucose, electrolyte, compound mineral, compound vitamin, and water is 1.3:0.5:0.15:0.3:100. The compound mineral is composed of ferrous sulfate, copper sulfate, magnesium sulfate, and zinc sulfate with a mass ratio of 1.0:0.5:2.0:0.5. The compound vitamin is composed of vitamin A, vitamin B, and vitamin C with a mass ratio of 4:1.3:1.3.

[0049] S6. Environmental management: within 15 days of weaning, the temperature of the pig house is set to 24℃. Subsequently, the temperature of the pig house is set to 21.5℃. The humidity of the pig house is set to 70%, and the pig house is kept well ventilated and well lit. The pig house is cleaned once in the morning and once in the afternoon every day.

[0050] S7. Disinfection management: sodium hydroxide solution is used for disinfection every week. After 3 hours of disinfection, lactic acid bacteria diluent is sprayed in the pig house. The concentration of sodium hydroxide solution is 3wt%. The lactic acid bacteria diluent is composed of lactic acid bacteria and pure water with a mass-volume ratio of 1.5:1000 g / mL, and the lactic acid bacteria has a bacterial activity of 5×10 8 CFU / g.

[0051] S8. Disease prevention: 4-day-old piglets are inoculated with circo virus vaccine. 19-day-old piglets are inoculated with swine fever vaccine. 24-day-old piglets are inoculated with pseudorabies attenuated vaccine. On the 7th day after weaning, the second dose of swine fever vaccine is inoculated. On the 16th day after weaning, foot-and-mouth disease vaccine is inoculated.

[0052] S9. Weaned piglet stage completion: piglets are sold from the 41st day of weaning, ending the weaned piglet breeding stage.

[0053] The starter feed includes the following raw materials in parts by weight: 25 parts of fish meal, 35 parts of whey powder, 3.5 parts of acidifier, 2 parts of intestinal conditioner, and 1 part of Chinese herbal medicine enzyme. The acidifier is composed of formic acid, lactic acid, ketoglutaric acid, and gluconic acid with a volume ratio of 2:3:1:2. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide with a mass ratio of 3:2:3:0.4. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, yinchen, plantain, and gentian, mixing and crushing them to 10mm, adding compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae with a mass ratio of 1.5:1.0:0.8, and sealing and fermenting at 32.5℃ for 54h, filtering with a 150-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme.

[0054] The nursing material I includes the following raw materials by weight: 15 parts of fish meal, 25 parts of puffed soybean meal, 3 parts of acidifying agent, 1.5 parts of intestinal regulator, 0.8 parts of bacteria enzyme complex agent, and 1.5 parts of Chinese herbal medicine enzyme. The nursing material II includes the following raw materials by weight: 10 parts of fish meal, 35 parts of soybean meal, 3 parts of acidifying agent, 2 parts of intestinal regulator, 1.2 parts of bacteria enzyme complex agent, and 1.5 parts of Chinese herbal medicine enzyme. The nursing material III includes the following raw materials by weight: 25 parts of soybean meal, 35 parts of corn meal, 7.5 parts of full-fat soybean meal, 7.5 parts of wheat bran, 2 parts of acidifying agent, 1.3 parts of intestinal regulator, 1.0 part of bacteria enzyme complex agent, and 3 parts of Chinese herbal medicine enzyme. The bacteria enzyme complex agent is composed of lactic acid bacteria, Bacillus subtilis, yeast, protease, and cellulase. The bacterial activity of the lactic acid bacteria, Bacillus subtilis, and yeast is 5×10 8 CFU / g, the protease activity is 5×10 7 U / kg, and the cellulase activity is 5×10 6 U / kg.

[0055] Example 3

[0056] A breeding method for improving the growth of weaned piglets, comprising the following steps:

[0057] S1. Food-seeking training: while being breastfed, the teat of a 5-7-day-old piglet is smeared with the training trough material, 3 times a day, 10g each time. While being breastfed, the 8-14-day-old piglets are fed 100g per piglet per day, 6 times a day. While being breastfed, the 15-21-day-old piglets are fed 200g per piglet per day, 5 times a day. While being breastfed, the 22-27-day-old piglets are fed 300g per piglet per day, 4 times a day.

[0058] S2. Gradual weaning: 4-6 days before weaning, the frequency of breastfeeding is 5 times, 2-3 days before weaning, the frequency of breastfeeding is 3 times, 1 day before weaning, the frequency of breastfeeding is 2 times, and only during the breastfeeding period, the sow and the piglets are kept together, and the sow is transferred to other pig houses during other time periods. The piglets are weaned at 28 days old and the body weight is 7Kg.

[0059] S3. Dry-wet transition feeding: The weaning was carried out at 10 o'clock on the first day of weaning. At 14 o'clock, 6.0 times of pure water was added to the starter to configure the wet feed, which was placed in the wet feed trough to feed the first time. At 18 o'clock, the wet feed was configured according to the above method to feed the second time. At 22 o'clock, the wet feed was configured according to the above method to feed the third time. During this period, the starter was added to the dry feed trough and the starter was kept uninterrupted. On the second to third day of weaning, the wet feed was fed 4 times at 7 o'clock, 12 o'clock, 17 o'clock and 22 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. On the fourth to fifth day of weaning, 3.5 times of pure water was added to the starter to configure the wet feed, which was fed 3 times at 7 o'clock, 15 o'clock and 22 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. On the sixth to seventh day of weaning, 2.0 times of pure water was added to the starter to configure the wet feed, which was fed 2 times at 12 o'clock and 17 o'clock, respectively, and the starter was added to the dry feed trough and kept uninterrupted during this period. The weight of the wet feed configured at a time was 600g.

[0060] S4. Feed management: On the eighth to thirteenth day of weaning, the starter and the nursery feed I were fed, and the mass ratio of the starter to the nursery feed I was 8:1 initially, and then the starter was reduced by 20% per day, and the nursery feed I was increased accordingly. On the fourteenth to twenty-fourth day of weaning, the nursery feed I and the nursery feed II were fed, and the mass ratio of the nursery feed I to the nursery feed II was 10:1 initially, and then the nursery feed I was reduced by 15% per day, and the nursery feed II was increased accordingly. On the twenty-fifth to fortieth day of weaning, the nursery feed II and the nursery feed III were fed, and the mass ratio of the nursery feed II to the nursery feed III was 6:1 initially, and then the nursery feed II was reduced by 15% per day, and the nursery feed III was increased accordingly.

[0061] S5. Water management: Within 15 days of weaning, warm water was fed, and then normal temperature water was fed. Water was added with glucose, electrolyte, compound mineral, and compound vitamin. The mass-volume ratio of glucose, electrolyte, compound mineral, compound vitamin, and water was 1.5:0.6:0.2:0.4:110. The compound mineral was composed of iron sulfate, copper sulfate, magnesium sulfate, and zinc sulfate with a mass ratio of 1.2:0.6:2.5:0.6. The compound vitamin was composed of vitamin A, vitamin B, and vitamin C with a mass ratio of 5:1.5:1.5.

[0062] S6. Environmental management: Within 15 days of weaning, the temperature of the pig house was set to 25℃. Subsequently, the temperature of the pig house was set to 23℃. The humidity of the pig house was set to 75%, and the pig house was kept well ventilated and well lit. The pig house was cleaned once in the morning and once in the afternoon every day.

[0063] S7. Disinfection management: Benzalkonium bromide solution is used for disinfection every week. Spray lactic acid bacteria diluent in the pig house 4h after disinfection. The concentration of benzalkonium bromide solution is 0.2wt%. The lactic acid bacteria diluent is composed of lactic acid bacteria and pure water with a mass-volume ratio of 2:1000, and the lactic acid bacteria has a viable count of 8x10 8 CFU / g.

[0064] S8. Disease prevention: 15-day-old piglets are inoculated with porcine circovirus vaccine. 20-day-old piglets are inoculated with swine fever vaccine. 25-day-old piglets are inoculated with attenuated pseudorabies vaccine. On the 8th day after weaning, the second dose of swine fever vaccine is inoculated. On the 17th day after weaning, the foot-and-mouth disease vaccine is inoculated.

[0065] S9. Weaned piglet stage completion: Weaned piglets are transferred to a fattening room or sold from the 41st day after weaning, ending the weaned piglet breeding stage.

[0066] The starter feed includes the following raw materials in parts by weight: 30 parts of fish meal, 40 parts of whey powder, 5 parts of acidifying agent, 3 parts of intestinal conditioner, and 1.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 3:4:1.5:3. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 4:3:4:0.5. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, artemisia, plantain, and gentian, mixing and crushing them to 15mm, adding a compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 2:1.5:1.0, and sealing and fermenting at 35℃ for 48h, filtering with a 200-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme.

[0067] The starter feed includes the following raw materials in parts by weight: 30 parts of fish meal, 40 parts of whey powder, 5 parts of acidifying agent, 3 parts of intestinal conditioner, and 1.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 3:4:1.5:3. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 4:3:4:0.5. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, artemisia, plantain, and gentian, mixing and crushing them to 15mm, adding a compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 2:1.5:1.0, and sealing and fermenting at 35℃ for 48h, filtering with a 200-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme. 8 The starter feed includes the following raw materials in parts by weight: 30 parts of fish meal, 40 parts of whey powder, 5 parts of acidifying agent, 3 parts of intestinal conditioner, and 1.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 3:4:1.5:3. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 4:3:4:0.5. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, artemisia, plantain, and gentian, mixing and crushing them to 15mm, adding a compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 2:1.5:1.0, and sealing and fermenting at 35℃ for 48h, filtering with a 200-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme. 7 The starter feed includes the following raw materials in parts by weight: 30 parts of fish meal, 40 parts of whey powder, 5 parts of acidifying agent, 3 parts of intestinal conditioner, and 1.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 3:4:1.5:3. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 4:3:4:0.5. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, artemisia, plantain, and gentian, mixing and crushing them to 15mm, adding a compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 2:1.5:1.0, and sealing and fermenting at 35℃ for 48h, filtering with a 200-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme. 6 The starter feed includes the following raw materials in parts by weight: 30 parts of fish meal, 40 parts of whey powder, 5 parts of acidifying agent, 3 parts of intestinal conditioner, and 1.5 parts of Chinese herbal medicine enzyme. The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid, and glucose acid in a volume ratio of 3:4:1.5:3. The intestinal conditioner is composed of spermidine, methionine, glutamine, and nano-zinc oxide in a mass ratio of 4:3:4:0.5. The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, artemisia, plantain, and gentian, mixing and crushing them to 15mm, adding a compound bacteria composed of yeast, lactic acid bacteria, and aspergillus oryzae in a mass ratio of 2:1.5:1.0, and sealing and fermenting at 35℃ for 48h, filtering with a 200-mesh filter, taking the filtrate, and then spray drying to obtain the herbal medicine enzyme.

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 2 is that the acidifying agent is composed of formic acid and lactic acid in a volume ratio of 2:3.

[0070] Comparative Example 2

[0071] The difference between this comparative example and Example 2 is that the raw materials for the starter feed, nursery feed I, nursery feed II, and nursery feed III do not contain intestinal conditioners.

[0072] Comparative Example 3

[0073] Compared with Implementation 2, the difference in this comparative example is that in step S3, creep feed of equal weight to wet feed is used instead of wet feed, that is, the transition feeding between dry and wet feed is not adopted, and dry feed is used directly.

[0074] Comparative Example 4

[0075] The difference between this comparative example and Implementation 2 is that no feeding training was conducted during the rearing of weaned piglets.

[0076] Comparative Example 5

[0077] The difference between this comparative example and Implementation 2 is that, in step S4, after gradually replacing the creep feed with nursery feed I, the feed is then entirely nursery feed I.

[0078] Comparative Example 6

[0079] The difference between this comparative example and Example 2 is that no diluted lactic acid bacteria solution was sprayed after disinfection.

[0080] One hundred and eighty healthy 4-day-old piglets of similar weight from our facility were randomly divided into nine groups and raised according to the methods of Examples 1-3 and Comparative Examples 1-6, respectively. They were raised until 40 days after weaning.

[0081] I. Growth Performance Measurement

[0082] On the first and last days of the experiment, the fasting weight of the piglets was measured before morning feeding. The feed intake of each group of piglets was accurately recorded daily. The number of piglets experiencing diarrhea and the number of days with diarrhea were also recorded. The average daily weight gain, feed conversion ratio, and diarrhea rate of each group of piglets were calculated. The results are shown in Table 1. The relevant calculation formulas are as follows:

[0083] Average daily weight gain = (final weight - initial weight) ÷ number of days of trial

[0084] Average daily feed intake = Total feed intake per group ÷ (Number of days in the experiment × Number of piglets)

[0085] Feed conversion ratio = Average daily feed intake ÷ Average daily weight gain

[0086] Diarrhea rate = (Number of pigs with diarrhea × Number of days with diarrhea) ÷ (Number of days in the experiment × Number of piglets)

[0087] Table 1

[0088]

[0089]

[0090] As can be seen from Table 1, the average daily weight gain of the piglets in the farming methods of Examples 1-3 is high and the feed conversion rate is low, and at the same time, the piglets have a low incidence of diarrhea. It can be seen that the farming method of the present application effectively improves the growth performance of weaned piglets. As can be seen from Table 1, the effect of Example 2 is the best.

[0091] By comparing Example 2 with Comparative Example 1, the ketoglutaric acid in Example 2 can adjust the pH of the gastrointestinal tract to improve the gastrointestinal environment, promote the activity of digestive enzymes, and improve the digestion and absorption rate of dry matter, protein and energy in piglets, thereby reducing the waste of feed and reducing the feed conversion rate. Ketoglutaric acid also activates intracellular signaling pathways to increase feed metabolizable energy, thereby promoting the synthesis of body protein in piglets, and thus improving the growth performance of piglets. Ketoglutaric acid can also reduce intestinal mucosal damage and improve the absorption capacity of the small intestine, thereby increasing the number of beneficial bacteria and reducing the number of harmful bacteria, thereby maintaining the intestinal microecological balance and reducing the incidence of diarrhea. After glucose acid enters the gastrointestinal tract, it can reduce the pH value in the intestinal tract to provide a suitable environment for the growth and reproduction of digestive enzymes and beneficial bacteria, and inhibit the reproduction of harmful bacteria, thereby reducing the incidence of diarrhea. The addition of glucose acid improves the palatability of the feed and increases the feed intake of piglets, thereby promoting the weight gain of piglets. Ketoglutaric acid, glucose acid, formic acid and lactic acid work together to form a stable acid barrier, which improves the performance of acidifiers through the pathways of adjusting the pH of the gastrointestinal tract, promoting nutrient absorption, enhancing immune function and promoting intestinal health, and provides better protection for the growth of piglets.

[0092] By comparing Example 2 with Comparative Example 2, Example 2 improves the intestinal morphology of piglets, increases the height of intestinal villi and reduces the depth of crypts by adding intestinal regulators. The increase in the height of intestinal villi increases the absorption area, thereby improving the absorption efficiency of nutrients in piglets, thereby promoting weight gain and reducing the feed conversion rate. Shallow crypts are helpful for the secretion of digestive juice and the absorption of nutrients, and help to maintain the stability of the intestinal environment and reduce the accumulation of harmful substances, thereby reducing the incidence of diarrhea.

[0093] By comparing Example 2 with Comparative Example 3, the liquid milk of the piglets in Comparative Example 3 is replaced by solid feed when the piglets are weaned, which can cause stress response of the weaned piglets. The physical form of the wet feed in Example 2 is similar to the milk, which helps to reduce the adverse effects of feed form mutation on the structure and function of the digestive tract of piglets, thereby reducing the stress response. And the wet feed is good in palatability, which is convenient for piglets to eat, thereby increasing the feed intake and promoting the growth of piglets. At the same time, the wet feed improves the digestive and absorptive efficiency of piglets, so that the amount of feed required for unit weight gain is reduced, i.e. the feed-to-gain ratio is reduced. Dry-wet two-tank transition feeding avoids feed waste by reasonable transition, further optimizing the feed utilization rate. Example 2 reduces the incidence of diarrhea by gradually reducing the feed-to-water ratio of wet feed and by reducing the feeding frequency of wet feed, allowing piglets to gradually eat dry feed independently, reducing stress response.

[0094] By comparing Example 2 with Comparative Example 4, the smearing of the starter feed helps piglets to be familiar with the smell and taste of the feed, laying a foundation for subsequent feed intake. Feeding in several times helps to maintain the appetite and digestive and absorptive capacity of piglets. Using starter feed to induce feeding also helps piglets to gradually adapt to solid feed before weaning, reducing the impact of weaning stress on the digestive system, and helping piglets to adapt to feed more quickly after weaning, avoiding problems such as indigestion. Acidifiers in the starter feed help to activate pepsinogen and other digestive enzymes, promote the secretion of digestive juice, and thus improve the digestive capacity of piglets. Chinese herbal medicine enzymes in the starter feed help to activate and enhance the immune system of piglets, improve their disease resistance, help to reduce the occurrence and spread of diseases, and ensure the healthy growth of piglets. By promoting intestinal health and improving digestive capacity, the starter feed induction helps to reduce the diarrhea rate of piglets. And the starter feed induction can help piglets to gradually reduce their dependence on milk before weaning, thereby reducing the lactation burden of sows, helping sows to recover faster, and improving the reproductive efficiency.

[0095] By comparing Example 2 with Comparative Example 5, the nutritional needs of piglets at different growth stages are different. As the age increases, the digestive system of piglets gradually develops and matures, and the demand for protein, energy and other nutrients also changes. By adjusting the feed formula, the nutritional needs of piglets at different stages can be better met, and their growth performance can be promoted. Gradually reducing the content of dairy products and increasing the amount of conventional raw materials such as soybean meal helps the digestive system of piglets gradually adapt to different types of feed. Through scientific and reasonable feed adjustment, it can ensure that piglets obtain sufficient nutrition at different growth stages, thereby promoting their rapid weight gain. Compared with using one type of feed all the time, adjusting the feed formula in stages can significantly improve the weight gain rate of piglets. As the age of piglets increases and their digestive system matures, their ability to digest and absorb feed gradually increases. By adjusting the feed formula, such as increasing the proportion of indigestible ingredients such as fiber, the development of the digestive system of piglets can be stimulated, and their utilization rate of feed can be improved, which helps to reduce the feed conversion ratio and improve breeding efficiency. By gradually increasing the proportion of indigestible ingredients such as fiber, the balance of intestinal flora and the integrity of intestinal mucosa of piglets can also be promoted, thereby reducing the incidence of diarrhea.

[0096] By comparing Example 2 with Comparative Example 6, Example 2 uses lactic acid bacteria diluent to spray the pig house after disinfection, so that lactic acid bacteria can effectively inhibit the growth and reproduction of harmful bacteria by competing for nutrients and space, reduce the spread and spread of pathogenic microorganisms, reduce the number of intestinal pathogenic bacteria, and maintain the intestinal health of piglets. Provide growth advantage for the original beneficial flora in the intestine, promote their reproduction and metabolic activity, and further consolidate the intestinal microecological balance. By inhibiting the growth of harmful bacteria and enhancing the intestinal barrier function, the occurrence of intestinal diseases such as diarrhea in piglets is reduced. And the organic acids produced by lactic acid bacteria metabolism can neutralize harmful gases such as ammonia, reduce the concentration of ammonia and hydrogen sulfide in the pig house, and improve the air quality. Therefore, spraying lactic acid bacteria diluent after disinfection of the pig house not only directly increases the number of beneficial probiotics, but also improves the intestinal microecological environment, enhances immunity, improves feed utilization and growth performance, reduces disease occurrence, and improves the pig house environment. These effects jointly act on the growth process of piglets, providing a strong guarantee for their healthy, rapid and efficient growth.

[0097] II. Intestinal morphology detection

[0098] In Example 1-3 and Comparative Example 2, each of 3 piglets with similar body weight was slaughtered, and the ileum sample was taken. The ileum was cut into 3cm segments, washed with physiological saline for 1min, fixed in 10wt% neutral formalin buffer for 24h, and after conventional dehydration, paraffin embedding, sectioning and staining, the crypt depth and villus height were measured. Double-blind reading, each slice was observed under 5 fields of view, and 10 complete villi and corresponding crypts were observed on each slice. The villus height and crypt depth were measured, and the average value was recorded in Table 2.

[0099] Table 2

[0100] Villus height / μm Crvpt depth / μm Villus height / Crvpt depth Example 1 357 234 1.53 Example 2 369 229 1.61 Example 3 355 238 1.49 Comparative Example 2 278 257 1.08

[0101] As can be seen from Table 2, the villus height of Examples 1-3 is significantly higher than that of Comparative Example 2, and the crypt depth is significantly shallower, so the villus height / crypt depth is also significantly improved. In Examples 1-3 of the present application, the addition of the intestinal conditioner, spermidine and glutamine therein, can promote the proliferation and differentiation of intestinal epithelial cells, thereby increasing the height of intestinal villi. At the same time, spermidine can also promote energy metabolism and fatty acid oxidation, providing sufficient energy for intestinal epithelial cells to support their growth and differentiation, indirectly promoting the growth of intestinal villi. And glutamine can enhance the barrier function of the intestinal tract, reduce the damage of harmful substances to intestinal epithelial cells, and protect the integrity of the intestinal villus structure. And spermidine and glutamine promote the migration of intestinal epithelial cells from the crypt to the top of the villus, accelerate the renewal process of crypt cells, and make the crypt depth shallower. Methionine can increase the height of intestinal villi by promoting protein synthesis in intestinal epithelial cells. At the same time, methionine can protect intestinal epithelial cells from oxidative stress damage and maintain the normal growth and differentiation ability of cells. Nano zinc oxide is conducive to the growth of intestinal villi and the regulation of crypt depth by inhibiting the growth of harmful bacteria in the intestinal tract, reducing their damage to intestinal epithelial cells, and maintaining the normal growth and differentiation ability of cells. The components in the intestinal conditioner of the present application act on the intestinal system of piglets through different mechanisms, promote the growth of intestinal villi and make the crypt depth shallower, thereby helping to improve the intestinal health and growth performance of piglets.

[0102] The above description is merely preferred embodiments of the present application, but not to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rearing method for improving the growth performance of weaned piglets, characterized by, Comprising the following steps: S1. Food training: 5-7 day-old piglets are smeared with the training trough material on the mouth while breastfeeding, 2-3 times a day, 5-10g each time; 8-14 day-old piglets are fed 50-100g of food per day, 4-6 times a day, while breastfeeding; 15-21 day-old piglets are fed 100-200g of food per day, 3-5 times a day, while breastfeeding; 22-27 day-old piglets are fed 200-300g of food per day, 2-4 times a day, while breastfeeding; S2. Gradual weaning: 4-6 days before weaning, the frequency of breastfeeding is 3-5 times, 2-3 days before weaning, the frequency of breastfeeding is 2-3 times, 1 day before weaning, the frequency of breastfeeding is 1-2 times, only during breastfeeding, the sow and piglets are kept together, and the sow is transferred to other pig houses during other periods; weaning at 28 days of age and body weight of 6-7Kg; S3. Dry and wet trough transition feeding: on the first day of weaning, weaning is performed at 9-10 o'clock, 4.0-6.0 times pure water is added to the training trough material to configure wet material, and the first wet material feeding is performed in the wet trough, at 17-18 o'clock, the wet material is configured according to the above method to perform the second wet material feeding, at 21-22 o'clock, the wet material is configured according to the above method to perform the third wet material feeding, and the training trough material is added to the dry trough during the period; on the second and third days of weaning, wet material is fed 4 times, at 6-7 o'clock, 11-12 o'clock, 16-17 o'clock and 21-22 o'clock, respectively, and the training trough material is added to the dry trough during the period; on the fourth and fifth days of weaning, 2.5-3.5 times pure water is added to the training trough material to configure wet material, and the wet material is fed 3 times at 6-7 o'clock, 14-15 o'clock and 21-22 o'clock, respectively, and the training trough material is added to the dry trough during the period; on the sixth and seventh days of weaning, 1.0-2.0 times pure water is added to the training trough material to configure wet material, and the wet material is fed 2 times at 11-12 o'clock and 16-17 o'clock, respectively, and the training trough material is added to the dry trough during the period; S4. Feed management: on the eighth to thirteenth day of weaning, training trough material and nursery feed I are fed, the mass ratio of training trough material to nursery feed I is (4-8):1 at the beginning, then the training trough material is reduced by 15-20% per day, and the nursery feed I is increased accordingly; on the fourteenth to twenty-fourth day of weaning, nursery feed I and nursery feed II are fed, the mass ratio of nursery feed I to nursery feed II is (8-10):1 at the beginning, then the nursery feed I is reduced by 10-15% per day, and the nursery feed II is increased accordingly; on the twenty-fifth to fortieth day of weaning, nursery feed II and nursery feed III are fed, the mass ratio of nursery feed II to nursery feed III is (4-6):1 at the beginning, then the nursery feed II is reduced by 10-15% per day, and the nursery feed III is increased accordingly; S5. Drinking water management: within 15 days of weaning, warm water is fed, and then normal temperature water is fed; glucose, electrolyte, compound mineral and compound vitamin are added to the water; S6. Environmental management: within 15 days of weaning, the temperature of the pig house is set to 23-25℃; the temperature of the subsequent pig house is set to 20-23℃; the humidity of the pig house is set to 65-75%, and the pig house is kept well ventilated and well lit; the pig house is cleaned once in the morning and once in the afternoon every day; S7. Disinfection management: one of potassium permanganate solution, sodium hydroxide solution and benzalkonium bromide solution is used for disinfection every week; 2-4 hours after disinfection, lactic acid bacteria diluent is sprayed in the pig house; S8. Disease prevention: 13-15 day-old piglets are inoculated with a circovirus vaccine; 18-20 day-old piglets are inoculated with a swine fever vaccine; 23-25 day-old piglets are inoculated with a pseudorabies attenuated vaccine; 7-8 days after weaning, the piglets are inoculated with a second dose of swine fever vaccine; 15-17 days after weaning, the piglets are inoculated with a foot-and-mouth disease vaccine; S9. Completion of the weaned piglet stage: the piglets are transferred to a fattening room or sold 41 days after weaning, ending the weaned piglet breeding stage; The starter feed comprises the following raw materials in parts by weight: 20-30 parts of fish meal, 30-40 parts of whey powder, 2-5 parts of acidifying agent, 1-3 parts of intestinal conditioner, and 0.5-1.5 parts of Chinese herbal medicine enzyme; The starter feed comprises the following raw materials in parts by weight: 20-30 parts of fish meal, 30-40 parts of whey powder, 2-5 parts of acidifying agent, 1-3 parts of intestinal conditioner, and 0.5-1.5 parts of Chinese herbal medicine enzyme; The acidifying agent is composed of formic acid, lactic acid, ketoglutaric acid and gluconic acid in a volume ratio of (1-3):(2-4):(0.5-1.5):(1-3); The intestinal conditioner is composed of spermidine, methionine, glutamine and nano-zinc oxide in a mass ratio of (2-4):(1-3):(2-4):(0.3-0.5); The Chinese herbal medicine enzyme is prepared by the following method: taking radix astragali, honeysuckle, sophora, capillaris, plantain, and gentian, mixing and crushing them to 5-15 mm, adding a compound bacteria composed of yeast, lactic acid bacteria and aspergillus oryzae in a mass ratio of (1-2):(1.0-1.5):(0.5-1.0), and sealing and fermenting at 30-35℃ for 48-60h, filtering with a 100-200 mesh filter, taking the filtrate, and then spray drying to obtain the Chinese herbal medicine enzyme.

2. The method for improving the growth of weaned piglets as described in claim 1, characterized in that, The wet feed configured in S3 has a weight of 400-600g.

3. The method for improving the growth of weaned piglets as described in claim 1, characterized in that, The bacteria enzyme complex agent is composed of lactic acid bacteria, bacillus subtilis, yeast, protease and cellulase, the lactic acid bacteria, bacillus subtilis and yeast have a bacteria activity of ≥1×10 8 CFU / g, the protease has a protease activity of ≥2×10 7 U / kg, and the cellulase has a cellulase activity of ≥2×10 6 U / kg.

4. The method for improving the growth of weaned piglets as described in claim 1, characterized in that, The mass / volume ratio of glucose, electrolyte, complex mineral substance, complex vitamin and water in S5 is (1.0-1.5):(0.4-0.6):(0.1-0.2):(0.2-0.4):(90-110), the complex mineral substance is composed of iron sulfate, copper sulfate, magnesium sulfate and zinc sulfate with a mass ratio of (0.8-1.2):(0.4-0.6):(1.5-2.5):(0.4-0.6), and the complex vitamin is composed of vitamin A, vitamin B and vitamin C with a mass ratio of (3-5):(1.0-1.5):(1.0-1.5).

5. The method for improving the growth of weaned piglets as described in claim 1, characterized in that, The concentration of potassium permanganate solution in S7 is 0.05-0.08wt%, the concentration of sodium hydroxide solution is 2-4wt%, and the concentration of benzalkonium bromide solution is 0.1-0.2wt%; the lactic acid bacteria diluent is composed of lactic acid bacteria with a mass volume ratio g / mL of (1-2):1000 and pure water, and the lactic acid bacteria has a bacterial activity of ≥1×10 8 CFU / g.

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