A method for feeding a sow dynamicized nutritional level feed

Abstract

The present application belongs to the technical field of animal feed, and discloses a feeding method of sow dynamic nutrition level feed, which comprises the following steps: preparing basic complete feed; preparing three kinds of functional concentrates, namely high-energy high-protein type concentrate A, high-fiber low-energy type concentrate B and high-fiber electrolyte type concentrate C; obtaining the BCS score, parity and environmental temperature of the sow; determining the concentrate type and mixing ratio according to the three variables of temperature, BCS and parity through quantitative decision rules; and feeding the sow after on-site mixing and compounding the basic feed and the concentrates in proportion. The present application also synchronously adjusts the single-day feeding amount according to the environmental temperature, realizes the concentration-intake collaborative regulation, and adds functional additives according to the decision result, so that the continuous dynamic adjustment of the nutrition level is realized, which is not dependent on the experience of the feeders, is simple and easy to operate, has low cost, and is suitable for individualized precision feeding of large-scale pig farms.

Description

Technical Field

[0001] This invention relates to the field of animal feed technology, and in particular to a method for feeding sows with a dynamic nutritional level feed. Background Technology

[0002] Feeding sows is a crucial aspect of pig production, directly impacting their reproductive performance, lactation capacity, and productive lifespan. Traditionally, sow feeding is divided into 2-4 fixed stages, such as pre-gestation feed, post-gestation feed, and lactation feed, with each stage using a fixed formula of commercial feed. However, sows' nutritional needs are influenced by various factors, including individual body condition differences, parity (primiparous vs. multiparous), and environmental temperature. Within the same stage, body condition can vary significantly among different sows, and high-temperature heat stress or low-temperature cold stress can also lead to substantial changes in feed intake and nutritional requirements. Therefore, a fixed-stage, fixed-formula feeding method is insufficient to meet the dynamically changing nutritional needs of sows.

[0003] In existing technologies, either only the feed amount is adjusted without adjusting the nutrient concentration, but the feed intake of sows is limited by gastrointestinal capacity and ambient temperature, leaving limited room for adjustment; or adjusting the nutrient level requires replacing the entire package of finished feed, which is costly, cumbersome, and cannot achieve continuous dynamic adjustment; furthermore, parity differences are not systematically addressed, and the nutritional needs of high-parity sows and primiparous sows cannot be accommodated in the same formula; finally, the response to environmental stress (especially high-temperature heat stress and low-temperature cold stress) is delayed, and there is a lack of targeted nutritional intervention programs. Summary of the Invention

[0004] The present invention aims to provide a feeding method for sows with dynamically nutritious feed to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A method for feeding sows with dynamically nutritious feed includes the following steps: S1. Prepare basic complete feed; S2. Prepare three functional concentrates: concentrate A, concentrate B, and concentrate C; wherein, concentrate A is a high-energy, high-protein concentrate, concentrate B is a high-fiber, low-energy concentrate, and concentrate C is a high-fiber, electrolyte concentrate. S3. Before mating, at 30 days of gestation, 60 days of gestation, 90 days of gestation, and at weaning, measure the backfat thickness at point P2 of the sow and convert it into a BCS score according to the following correspondence: <10mm = 1 point, 10~14mm = 2 points, 14~18mm = 3 points, 18~22mm = 4 points, >22mm = 5 points; the P2 point is the backfat thickness measurement point located 6.5 cm vertically from the last rib of the sow to the back midline. S4. Obtain the sow's parity information and ambient temperature information; S5. Determine the concentrate type and mixing ratio according to the following rules: If the ambient temperature is ≥28℃, select concentrate C; If the ambient temperature is <28℃ and BCS≤2, select concentrate A; If the ambient temperature is <28℃ and BCS≥4, select concentrate B; If the ambient temperature is <28℃ and BCS=3, then select according to the parity: select concentrate A when parity=1, do not add concentrate when parity=2~4, and select concentrate B when parity≥5. If it is determined that no concentrate is added, the mixing ratio is directly set to 0, and the following calculations are not performed; otherwise, the mixing ratio is calculated according to the following formula: Ratio = Base Ratio + BCS Correction + Parity Correction + Temperature Correction, where: The basic ratio is: concentrate A is 10, concentrate B is 12, and concentrate C is 10. BCS correction: +3 when BCS=2, +6 when BCS=1, +2 when BCS=4, and +4 when BCS=5; Parity correction: +3 for parity = 1, -3 for parity ≥ 5 and when using concentrate B; Temperature correction: +4 when ambient temperature ≤10℃; The calculated ratio is clamped: if it is less than 5, take 5; if it is greater than 20, take 20; if it is in the range of 5 to 20, take the calculated value; the clamped ratio represents the number of concentrate parts corresponding to 100 parts of base material. S6. According to the type and proportion of concentrate determined in step S5, mix and compound the base material and concentrate on site. S7. Feed the compounded finished feed to the corresponding sows.

[0006] Preferably, the basic complete feed consists of the following raw materials in parts by weight: 58-62 parts corn, 20-22 parts soybean meal, 9-11 parts wheat bran, 2.5-3.5 parts fishmeal, 1.2-1.8 parts soybean oil, 1.1-1.3 parts dicalcium phosphate, 0.9-1.1 parts limestone powder, 0.35-0.45 parts salt, and 0.9-1.1 parts premix; the premix contains vitamin A, vitamin D3, vitamin E, vitamin K3, vitamin B1, vitamin B2, vitamin B6, and vitamin B1. 12 Niacin, pantothenic acid, folic acid, biotin, choline, copper, iron, zinc, manganese, iodine, selenium.

[0007] Preferably, concentrate A, concentrate B, and concentrate C are each composed of the following raw materials in parts by weight: Concentrate A consists of: 28-32 parts puffed soybeans, 16-19 parts fish meal, 11-14 parts whey powder, 11-14 parts soybean meal, 9-11 parts soybean oil, 6-8 parts glucose, 2.2-2.8 parts calcium dihydrogen phosphate, 2.2-2.8 parts lysine, 0.6-0.9 parts methionine, 0.6-0.9 parts threonine, 0.25-0.35 parts vitamin E, 0.12-0.18 parts compound enzyme preparation, and wheat bran powder to make up to 100 parts. The concentrate B consists of: 32-38 parts wheat bran, 18-22 parts beet meal, 12-18 parts alfalfa meal, 11-14 parts soybean meal, 9-11 parts rice bran meal, 1.2-1.8 parts magnesium sulfate, 0.6-0.9 parts potassium chloride, and rice husk powder to make up to 100 parts. The concentrate C consists of: 22-28 parts beet meal, 17-23 parts wheat bran, 11-14 parts soybean meal, 3.5-4.5 parts sodium bicarbonate, 2.2-2.8 parts potassium chloride, 1.2-1.8 parts sodium chloride, 0.35-0.45 parts coated vitamin C, 0.25-0.35 parts betaine, and wheat bran to make up to 100 parts.

[0008] Preferably, when the ambient temperature is ≥28℃, the daily feeding amount is simultaneously reduced by 8% in step S7; when the ambient temperature is ≤10℃, the daily feeding amount is simultaneously increased by 4%.

[0009] Preferably, the finished feed compounded in step S6 is fed within 60 minutes; if it is not fed within 60 minutes, the batch is discarded and compounded again.

[0010] Preferably, based on determining the concentrate type in step S5: When concentrated feed C is selected, and BCS≥4 and parity≥5, an additional plant extract compound package is added in step S6: curcumin 200~300g / ton, rosmarinic acid 100~150g / ton, tannic acid 150~200g / ton. When concentrated feed A is selected, and BCS≤2 and parity≥4, an additional 800~1200g / ton of coated sodium butyrate is added in step S6; When concentrated feed A is selected, and the parity is ≥5 and the product is in the lactation period, an additional 1000~1500g / ton of yeast nucleotide extract is added in step S6.

[0011] Preferably, based on determining the concentrate type in step S5: When concentrate B is selected, and the parity is ≥5 and BCS=3, an additional 0.3~0.5 parts by weight of lysine is added in step S6. When concentrate A is selected, and parity = 1 and BCS ≤ 2, 0.5 to 0.8 parts of branched-chain amino acid complex are added in step S6, wherein the weight ratio of leucine: isoleucine: valine in the branched-chain amino acid complex is 2:1:1.

[0012] Preferably, in step S6, the mixing and compounding specifically involves putting the base material and the concentrate into a mixer and mixing them for a mixing time of not less than 90 seconds; the mixing ratio can be continuously adjusted in increments of 1% within the range of 5 to 20.

[0013] Preferably, concentrate A, concentrate B, and concentrate C are all produced using a low-temperature granulation process with a granulation temperature ≤ 65℃.

[0014] Preferably, in step S6, the amount of compounding per batch is determined according to the amount fed to the sow on that day, and each sow is compounded independently without being mixed with the feed of other sows.

[0015] The beneficial effects of this technical solution compared to existing technologies are as follows: (1) This technical solution uses three factors of BCS body condition, parity and ambient temperature for joint decision-making, and is combined with three functional concentrates of high energy and high protein, high fiber and low energy and high fiber and electrolyte. It can switch the nutritional type and quantitatively adjust the ratio in real time for different scenarios such as being too thin, too fat, first-time mother, high parity, heat stress and cold stress. It breaks through the limitation that traditional fixed stage and fixed formula feed cannot meet the dynamic nutritional needs of individuals, so that each sow can obtain nutritional supply that matches its physiological state.

[0016] (2) By adjusting the type and proportion of concentrate, the nutritional level can be continuously adjusted without replacing the whole package of finished feed. The operation is simple and the response is rapid. At the same time, the basic feed is the universal main body, which greatly reduces the production cost of multi-formula preparation, storage and feed replacement, and is suitable for rapid implementation on the ground in large-scale pig farms.

[0017] (3) By using clear thresholds and mathematical formulas to select concentrates and calculate mixing ratios, and in conjunction with the BCS backfat quantitative scoring standard, the dependence on feeders' experience is completely eliminated. Different farms and different operators can stably reproduce the same feeding program, ensuring feeding consistency and reducing fluctuations in reproductive performance caused by human error.

[0018] (4) By simultaneously reducing the amount of feed in high temperature environment and simultaneously increasing the amount of feed in low temperature environment, a synergistic mechanism is formed with the adjustment of nutrient concentration. This avoids excessive gastrointestinal burden during heat stress and compensates for increased metabolic consumption during cold stress. It can ensure stable actual nutrient intake of sows even when the environment fluctuates drastically, thereby improving stress resistance and feed intake performance.

[0019] (5) By combining plant extract compound packs for high parity, overweight, and heat-stressed sows, adding sodium butyrate for weak and high parity sows, and adding yeast nucleotide extract for high parity sows in lactation, and combining branched-chain amino acids and extra lysine for precise fortification, the sows can effectively maintain intestinal health, enhance immunity, improve lactation performance, and extend their productive lifespan while improving their body condition. Attached Figure Description

[0020] Figure 1 This is a flowchart of the method of the present invention; Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1 The feeding method for sows with dynamically nutritious feed, as shown, includes the following steps: Step S1: Prepare basic complete feed Weigh the raw materials according to the formula, mix them evenly, and make basic complete feed.

[0021] The basic complete feed consists of the following ingredients by weight: 58-62 parts corn, 20-22 parts soybean meal, 9-11 parts wheat bran, 2.5-3.5 parts fishmeal, 1.2-1.8 parts soybean oil, 1.1-1.3 parts dicalcium phosphate, 0.9-1.1 parts limestone powder, 0.35-0.45 parts salt, and 0.9-1.1 parts premix. The premix contains vitamins A, D3, E, K3, B1, B2, B6, and B6. 12 Niacin, pantothenic acid, folic acid, biotin, choline, copper, iron, zinc, manganese, iodine, selenium.

[0022] Step S2: Prepare three functional concentrates Three functional concentrates were prepared: Concentrate A (high-energy, high-protein), Concentrate B (high-fiber, low-energy), and Concentrate C (high-fiber, electrolyte-rich). None of the three concentrates were fed alone; they were mixed with the basal feed in the specified proportions before use.

[0023] Concentrate A consists of the following raw materials in parts by weight: 28-32 parts puffed soybeans, 16-19 parts fish meal, 11-14 parts whey powder, 11-14 parts soybean meal, 9-11 parts soybean oil, 6-8 parts glucose, 2.2-2.8 parts calcium dihydrogen phosphate, 2.2-2.8 parts lysine, 0.6-0.9 parts methionine, 0.6-0.9 parts threonine, 0.25-0.35 parts vitamin E, 0.12-0.18 parts compound enzyme preparation, and wheat bran powder to make up to 100 parts.

[0024] Concentrate B consists of the following raw materials in parts by weight: 32-38 parts wheat bran, 18-22 parts beet meal, 12-18 parts alfalfa meal, 11-14 parts soybean meal, 9-11 parts rice bran meal, 1.2-1.8 parts magnesium sulfate, 0.6-0.9 parts potassium chloride, and rice husk powder to make up to 100 parts.

[0025] Concentrate C is composed of the following raw materials in parts by weight: 22-28 parts beet meal, 17-23 parts wheat bran, 11-14 parts soybean meal, 3.5-4.5 parts sodium bicarbonate, 2.2-2.8 parts potassium chloride, 1.2-1.8 parts sodium chloride, 0.35-0.45 parts coated vitamin C, 0.25-0.35 parts betaine, and wheat bran to make up to 100 parts.

[0026] Concentrate A, Concentrate B, and Concentrate C all adopt a low-temperature granulation process with a granulation temperature ≤65℃.

[0027] Step S3: Obtain the sow's BCS score Backfat thickness was measured at five time points: before mating, at 30 days of gestation, at 60 days of gestation, at 90 days of gestation, and at weaning. Point P2 was the measurement point located 6.5 cm vertically from the last rib to the midline of the back of the sow.

[0028] The following correspondence will be used to convert back fat thickness into BCS scores: <10mm is 1 point, 10~14mm is 2 points, 14~18mm is 3 points, 18~22mm is 4 points, and >22mm is 5 points.

[0029] Step S4: Obtain parity and ambient temperature Obtain parity information (1st, 2nd-4th, ≥5th) and ambient temperature information (≤10℃, 10-28℃, ≥28℃) for sows.

[0030] Step S5: Determine the type of concentrate and mixing ratio Determine the type of concentrate according to the following rules: If the ambient temperature is ≥28℃, select concentrate C; If the ambient temperature is <28℃ and BCS≤2, select concentrate A; If the ambient temperature is <28℃ and BCS≥4, select concentrate B; If the ambient temperature is <28℃ and BCS=3, then select according to the parity: select concentrate A when parity=1, do not add concentrate when parity=2~4, and select concentrate B when parity≥5.

[0031] High-temperature heat stress (≥28℃) is the most serious threat to sows, and may cause problems such as decreased feed intake, electrolyte imbalance, and constipation. Therefore, when the temperature is ≥28℃, concentrate feed C (high fiber electrolyte type) should be selected as the priority to solve the heat stress problem.

[0032] Under non-high temperature conditions, BCS is the main factor determining nutritional requirements. Underweight sows (BCS≤2) need to quickly replenish energy and protein, so concentrate feed A (high energy, high protein type) should be selected; overweight sows (BCS≥4) need to control energy intake, so concentrate feed B (high fiber, low energy type) should be selected.

[0033] When BCS=3 (standard body condition), parity becomes the determining factor. Primiparous sows (parity=1) are still growing and require additional nutritional support, so concentrate feed A is selected; moderately multiparous sows (parity=2~4) are in good body condition and do not need to be given concentrate feed; high-parity sows (≥5) have decreased metabolic capacity and are prone to obesity, so concentrate feed B is selected.

[0034] Calculate the mixing ratio: If it is determined that no concentrate is added, the mixing ratio is directly set to 0, and the following calculations are not performed; otherwise, the mixing ratio is calculated according to the following formula: Ratio = Base Ratio + BCS Correction + Parity Correction + Temperature Correction, where: The basic ratio is: concentrate A is 10, concentrate B is 12, and concentrate C is 10. BCS correction: +3 when BCS=2, +6 when BCS=1, +2 when BCS=4, and +4 when BCS=5; Parity correction: +3 for parity = 1, -3 for parity ≥ 5 and when using concentrate B; Temperature correction: +4 when ambient temperature ≤10℃; The calculated ratio is clamped: if it is less than 5, take 5; if it is greater than 20, take 20; if it is within the range of 5-20, take the calculated value. The clamping process limits the ratio to the range of 5-20, ensuring that the amount of concentrate added is not less than 5% (otherwise the effect will be insignificant) and not more than 20% (otherwise it may cause nutrient overdose or diarrhea). The clamped ratio represents the number of concentrate portions corresponding to 100 portions of base material.

[0035] Step S6: On-site compounding According to the concentrate type and ratio determined in step S5, add the base feed and concentrate to the mixer and mix for at least 90 seconds. The mixing ratio can be continuously adjusted in 1% increments within the range of 5-20. The amount of compounding per batch is determined according to the amount fed to the sow on that day. Each sow should be compounded independently and not mixed with the feed of other sows. During the mixing process, functional additives are added simultaneously according to the concentrate type determined in step S5 and the sow's BCS, parity, and physiological stage: Based on the determination of the concentrate type in step S5, functional additives are added according to the conditions: When concentrated feed C is selected in step S5, and the BCS ≥ 4 and parity ≥ 5, add a plant extract complex package: curcumin 200~300g / ton, rosmarinic acid 100~150g / ton, and tannic acid 150~200g / ton. Curcumin has antioxidant and anti-inflammatory effects, can scavenge free radicals, and reduce oxidative damage caused by heat stress; rosmarinic acid has anti-inflammatory and antibacterial effects, and can inhibit the release of inflammatory factors; tannic acid has astringent and antioxidant effects, and can protect the intestinal mucosa. The synergistic effect of these three can alleviate chronic inflammatory response and oxidative stress in high-parity sows under heat stress conditions.

[0036] When concentrated feed A is selected in step S5, and BCS ≤ 2 and parity ≥ 4, add 800~1200g / ton of coated sodium butyrate. Sodium butyrate is a direct energy source for intestinal epithelial cells, promoting intestinal villus growth, repairing damaged intestinal mucosa, and improving nutrient absorption. The coating treatment allows for slow release in the small intestine, preventing premature absorption in the stomach. It is suitable for thin, older sows (high parity, low body condition), improving their digestive and absorptive functions and promoting body condition recovery.

[0037] When concentrated feed A is selected in step S5, and the sow is at least 5 parities and in lactation, add 1000-1500 g / ton of yeast nucleotide extract. Nucleotides are important raw materials for the proliferation of immune cells, which can repair damaged immune cells and enhance immune function; at the same time, they can promote the activity of the feeding center and increase feed intake. This is suitable for high-parity lactating sows, and can alleviate their immune decline and decreased feed intake, improve lactation performance and weaning weight of piglets.

[0038] When concentrate B is selected in step S5, and the sow has a parity ≥5 and BCS=3, an additional 0.3~0.5 parts by weight of lysine is added. Lysine is the first limiting amino acid for sows and is crucial for muscle maintenance and lactation performance. Concentrate B itself is a low-energy, high-fiber formula with a relatively low lysine level. High-parity standard condition sows (parity ≥5 and BCS=3) require a higher lysine:energy ratio to combat muscle loss and maintain lactation performance; therefore, additional lysine is added to optimize the amino acid balance.

[0039] When concentrate A is selected in step S5, and the parity is 1 and BCS ≤ 2, 0.5-0.8 parts of branched-chain amino acid complex are added. The weight ratio of leucine:isoleucine:valine in the branched-chain amino acid complex is 2:1:1. Branched-chain amino acids (leucine, isoleucine, and valine) are key amino acids for muscle protein synthesis. Leucine can activate the mTOR signaling pathway to promote protein synthesis, while isoleucine and valine participate in energy metabolism and immune regulation. Primiparous, underweight sows (parity = 1 and BCS ≤ 2) are still growing and need to support lactation, leading to a significant increase in their need for branched-chain amino acids. Adding the branched-chain amino acid complex can promote mammary gland development, increase milk production, and improve body condition recovery.

[0040] Step S7: Feeding Feed the compounded finished feed to the corresponding sows. When the ambient temperature is ≥28℃, reduce the daily feed amount by 8%; when the ambient temperature is ≤10℃, increase the daily feed amount by 4%. The compounded finished feed should be fed within 60 minutes; if it is not fed within 60 minutes, discard the batch and re-combine.

[0041] The specific implementation process is as follows: Select a high parity sow, of the Large White crossbred, in her 5th litter, and bred on January 10, 2025 (winter). Her pre-breeding BCS is 4 (slightly overweight).

[0042] Table 1 Table 1 shows the feeding records for each stage. BCS (Body Condition Syndrome) was not measured during the lactation period after farrowing because the farrowing process causes temporary changes in body condition, and the BCS measured at this time cannot accurately reflect the sow's body condition. BCS measurements at weaning were used as the assessment basis.

[0043] From pre-mating to 30 days of gestation: ambient temperature 5-8℃, classified as cold stress (≤10℃). BCS=4 (slightly obese), concentrate feed B (high fiber, low energy) is selected according to the decision-making rules to control body condition. Basal ratio 12, temperature correction +4, mixing ratio = 16. At the same time, the daily feed amount is increased by 4%.

[0044] Day 60 of gestation: Ambient temperature 12℃, no cold stress. BCS remains 4, concentrate feed B selected. Basal ratio 12, no correction, mixing ratio = 12. Feeding amount returned to normal.

[0045] From 90 days of gestation to weaning: ambient temperature 18~25℃, BCS drops to 3 (standard condition). Parity = 5, concentrate B is selected according to the decision rule. Simultaneously meeting the criteria of "parity ≥ 5 and BCS = 3", an additional 0.4 parts of lysine are added to optimize amino acid balance.

[0046] From before mating to 30 days of gestation: when the ambient temperature is ≤10℃, increase the daily feed amount by 4%.

[0047] Other stages: When the ambient temperature is >10℃, the feeding amount is not adjusted.

[0048] In this embodiment, the sow's body condition (BCS) was 4 (slightly obese) before mating. After experiencing cold stress, the BCS was successfully reduced to 3 using concentrate feed B. Lysine was then added according to the decision rule after 90 days of gestation. Body condition was well controlled throughout the reproductive cycle, and both litter size and feed intake during lactation were excellent.

[0049] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for feeding sows with dynamically adjusted nutritional levels, characterized in that, Includes the following steps: S1. Prepare basic complete feed; S2. Prepare three functional concentrates: concentrate A, concentrate B, and concentrate C; wherein, concentrate A is a high-energy, high-protein concentrate, concentrate B is a high-fiber, low-energy concentrate, and concentrate C is a high-fiber, electrolyte concentrate. S3. Before mating, at 30 days of gestation, 60 days of gestation, 90 days of gestation, and at weaning, measure the backfat thickness at point P2 of the sow and convert it into a BCS score according to the following correspondence: <10mm = 1 point, 10~14mm = 2 points, 14~18mm = 3 points, 18~22mm = 4 points, >22mm = 5 points; the P2 point is the backfat thickness measurement point located 6.5 cm vertically from the last rib of the sow to the back midline. S4. Obtain the sow's parity information and ambient temperature information; S5. Determine the concentrate type and mixing ratio according to the following rules: If the ambient temperature is ≥28℃, select concentrate C; If the ambient temperature is <28℃ and BCS≤2, select concentrate A; If the ambient temperature is <28℃ and BCS≥4, select concentrate B; If the ambient temperature is <28℃ and BCS=3, then select according to the parity: select concentrate A when parity=1, do not add concentrate when parity=2~4, and select concentrate B when parity≥5. If it is determined that no concentrate is added, the mixing ratio is directly set to 0, and the following calculations are not performed; otherwise, the mixing ratio is calculated according to the following formula: Ratio = Base Ratio + BCS Correction + Parity Correction + Temperature Correction, where: The basic ratio is: concentrate A is 10, concentrate B is 12, and concentrate C is 10. BCS correction: +3 when BCS=2, +6 when BCS=1, +2 when BCS=4, and +4 when BCS=5; Parity correction: +3 for parity = 1, -3 for parity ≥ 5 and when using concentrate B; Temperature correction: +4 when ambient temperature ≤10℃; The calculated ratio is clamped: if it is less than 5, take 5; if it is greater than 20, take 20; if it is in the range of 5 to 20, take the calculated value; the clamped ratio represents the number of concentrate parts corresponding to 100 parts of base material. S6. According to the type and proportion of concentrate determined in step S5, mix and compound the base material and concentrate on site. S7. Feed the compounded finished feed to the corresponding sows.

2. The feeding method for sows with dynamically nutritious feed as described in claim 1, characterized in that, The basic complete feed consists of the following ingredients in parts by weight: 58-62 parts corn, 20-22 parts soybean meal, 9-11 parts wheat bran, 2.5-3.5 parts fishmeal, 1.2-1.8 parts soybean oil, 1.1-1.3 parts dicalcium phosphate, 0.9-1.1 parts limestone powder, 0.35-0.45 parts salt, and 0.9-1.1 parts premix; the premix contains vitamins A, D3, E, K3, B1, B2, B6, and B6. 12 Niacin, pantothenic acid, folic acid, biotin, choline, copper, iron, zinc, manganese, iodine, selenium.

3. The feeding method for sows with dynamically nutritious feed as described in claim 1, characterized in that, Concentrate A, Concentrate B, and Concentrate C are each composed of the following raw materials in parts by weight: Concentrate A consists of: 28-32 parts puffed soybeans, 16-19 parts fish meal, 11-14 parts whey powder, 11-14 parts soybean meal, 9-11 parts soybean oil, 6-8 parts glucose, 2.2-2.8 parts calcium dihydrogen phosphate, 2.2-2.8 parts lysine, 0.6-0.9 parts methionine, 0.6-0.9 parts threonine, 0.25-0.35 parts vitamin E, 0.12-0.18 parts compound enzyme preparation, and wheat bran powder to make up to 100 parts. The concentrate B consists of: 32-38 parts wheat bran, 18-22 parts beet meal, 12-18 parts alfalfa meal, 11-14 parts soybean meal, 9-11 parts rice bran meal, 1.2-1.8 parts magnesium sulfate, 0.6-0.9 parts potassium chloride, and rice husk powder to make up to 100 parts. The concentrate C consists of: 22-28 parts beet meal, 17-23 parts wheat bran, 11-14 parts soybean meal, 3.5-4.5 parts sodium bicarbonate, 2.2-2.8 parts potassium chloride, 1.2-1.8 parts sodium chloride, 0.35-0.45 parts coated vitamin C, 0.25-0.35 parts betaine, and wheat bran to make up to 100 parts.

4. The feeding method for a sow with a dynamic nutritional level feed as described in claim 1, characterized in that, When the ambient temperature is ≥28℃, the daily feed amount is simultaneously reduced by 8% in step S7; when the ambient temperature is ≤10℃, the daily feed amount is simultaneously increased by 4%.

5. The feeding method for a sow with a dynamic nutritional level feed as described in claim 1, characterized in that, The finished feed compounded in step S6 should be fed within 60 minutes; if it is not fed within 60 minutes, the batch should be discarded and compounded again.

6. The feeding method for a sow with a dynamic nutritional level feed as described in claim 3, characterized in that, Based on the determination of the concentrate type in step S5: When concentrated feed C is selected, and BCS≥4 and parity≥5, an additional plant extract compound package is added in step S6: curcumin 200~300g / ton, rosmarinic acid 100~150g / ton, tannic acid 150~200g / ton. When concentrated feed A is selected, and BCS≤2 and parity≥4, an additional 800~1200g / ton of coated sodium butyrate is added in step S6; When concentrated feed A is selected, and the parity is ≥5 and the product is in the lactation period, an additional 1000~1500g / ton of yeast nucleotide extract is added in step S6.

7. The feeding method for a sow with a dynamic nutritional level feed as described in claim 3, characterized in that, Based on the determination of the concentrate type in step S5: When concentrate B is selected, and the parity is ≥5 and BCS=3, 0.3~0.5 parts by weight of lysine are added in step S6. When concentrate A is selected, and parity = 1 and BCS ≤ 2, 0.5 to 0.8 parts of branched-chain amino acid complex are added in step S6, wherein the weight ratio of leucine: isoleucine: valine in the branched-chain amino acid complex is 2:1:

1.

8. The feeding method for a sow with a dynamic nutritional level feed as described in claim 1, characterized in that, In step S6, the mixing and compounding specifically involves putting the base material and the concentrate into a mixer and mixing them for a mixing time of not less than 90 seconds; the mixing ratio can be continuously adjusted in increments of 1% within the range of 5 to 20.

9. The feeding method for a sow with a dynamic nutritional level feed as described in claim 1, characterized in that, Concentrate A, concentrate B, and concentrate C are all produced using a low-temperature granulation process with a granulation temperature ≤65℃.

10. The feeding method for a sow with a dynamic nutritional level feed as described in claim 1, characterized in that, In step S6, the amount of compounding per batch is determined according to the amount fed to the sow on that day. Each sow is compounded independently and is not mixed with the feed of other sows.

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