CN114432385B

CN114432385B - Chinese herbal medicine feed additive for improving reproductive performance of sows and preparation method thereof

Info

Publication number: CN114432385B
Application number: CN202210174909.3A
Authority: CN
Inventors: 张勇; 袁建; 曾姗姗; 王金涛; 曾素梅; 郭徵力; 郭勇; 王天松; 王智伟
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2023-05-09
Anticipated expiration: 2042-02-24
Also published as: CN114432385A

Abstract

The invention discloses a Chinese herbal medicine formula for improving reproductive performance of sows, which comprises the following components in parts by weight: 22-30 parts of oyster powder, 12-18 parts of dangshen, 4-6 parts of black matrimony vine, 13-19 parts of glossy privet fruit, 4-6 parts of akebia stem, 14-20 parts of liquorice and 13-19 parts of dandelion. The invention also discloses a preparation method of the Chinese herbal medicine for improving the reproductive performance of the sow, which comprises the following steps: step one: preparing Chinese herbal medicines in a formula and drying; step two: weighing traditional Chinese medicines according to the weight parts in the formula; step three: pulverizing the Chinese herbal medicines and stirring uniformly; step four: bagging the Chinese herbal medicine powder and placing the powder in a ventilated drying place for standby. The invention has the advantages of safety, no toxic or side effect, no residue, and capabilities of improving the utilization efficiency of feed, reducing the dead fetus and mummy of the sow, improving the distribution rate of the sow, the immunity level of weaned pigs, the number of weaned pigs and the weight of weaned individuals, reducing the diarrhea of the pigs after early weaning, promoting the growth of the pigs and reducing the stress response.

Description

Chinese herbal medicine feed additive for improving reproductive performance of sows and preparation method thereof

Technical Field

The invention relates to a Chinese herbal medicine feed additive for improving reproductive performance of sows and a preparation method thereof, belonging to the technical field of sow feeding.

Background

The sow in the lactation stage is subjected to great stress in nutrition, physiology, metabolism and the like, so that the incidence rate of diseases in the lactation stage is continuously improved, and therefore, the health condition of the lactating sow is important in the animal production link.

In actual production, a certain amount of antibiotics are added singly or jointly into the basic ration of the sow, so that stress response caused by pathogenic bacteria and the like can be prevented or relieved. However, long-term, large amounts of unreasonable additions lead to drug residues, increasingly high bacterial resistance, and reduced therapeutic efficacy of antibiotics against various bacterial diseases.

Disclosure of Invention

The invention aims to solve the technical problems that: the Chinese herbal medicine feed additive for improving the reproductive performance of the sows and the preparation method thereof are provided, so that the problem that the treatment effect of antibiotics is reduced due to the enhancement of bacterial drug resistance caused by adding antibiotics into basic ration of the sows for a long time in the prior art is solved.

The technical scheme adopted by the invention is as follows: a Chinese herbal medicine feed additive for improving reproductive performance of sows is prepared from the following raw materials in parts by weight: 22-30 parts of oyster powder, 12-18 parts of dangshen, 4-6 parts of black matrimony vine, 13-19 parts of glossy privet fruit, 4-6 parts of akebia stem, 14-20 parts of liquorice and 13-19 parts of dandelion.

Preferably, the Chinese herbal medicine formula comprises the following raw materials in parts by weight: 26 parts of oyster powder, 15 parts of dangshen, 5 parts of black matrimony vine, 16 parts of glossy privet fruit, 5 parts of akebia stem, 17 parts of liquorice and 16 parts of dandelion.

Preferably, the Chinese herbal medicine formula is added into the basic ration of the sow for feeding, and the adding proportion is 0.5-2% by weight.

Preferably, the Chinese herbal medicine formula is added into the basic ration of the sow for feeding, and the adding proportion is 0.5% by weight.

Preferably, the Chinese herbal medicine formula is added into the basic ration of the sow for feeding, and the adding proportion is 1% by weight.

Preferably, the Chinese herbal medicine formula is added into the basic ration of the sow, and the adding proportion is 2% by weight.

The invention also discloses a preparation method of the Chinese herbal medicine for improving the reproductive performance of the sow, which comprises the following steps:

step one: preparing seven Chinese herbal medicines of oyster powder, dangshen, black matrimony vine, glossy privet fruit, akebia stem, liquorice and dandelion, and drying;

step two: weighing seven Chinese herbal medicines dried in the first step according to the following weight parts: 22-30 parts of oyster powder, 12-18 parts of dangshen, 4-6 parts of black matrimony vine, 13-19 parts of glossy privet fruit, 4-6 parts of akebia stem, 14-20 parts of liquorice and 13-19 parts of dandelion;

step three: crushing and uniformly stirring the seven Chinese herbal medicines in the second step;

step four: bagging the uniformly mixed Chinese herbal medicine powder, and placing the bagged Chinese herbal medicine powder in a ventilated drying place for standby.

Preferably, the crushing of seven traditional Chinese medicines in the third step adopts the following equipment: the grinding machine comprises a frame, wherein a grinding hopper is arranged on the frame, a blade is arranged in the grinding hopper, and the blade rotates under the drive of a motor; a sieve plate is arranged at the bottom of the crushing hopper; the crushing hopper is driven by the driving mechanism to reciprocate up and down; the inside of the crushing hopper is provided with a powder scraping device for scraping the powder on the inner side wall of the crushing hopper.

Preferably, the driving mechanism comprises a fixed ring fixed on the frame, the outer side wall of the crushing bucket is cylindrical, the fixed ring is sleeved on the outer side of the crushing bucket, an inner thread is arranged on the inner side wall of the fixed ring, an outer thread matched with the inner thread is arranged on the outer side wall of the crushing bucket, when the crushing bucket moves upwards, the inner thread and the outer thread are matched to enable the crushing bucket to rotate positively, and when the crushing bucket moves downwards, the inner thread and the outer thread are matched to enable the crushing bucket to rotate reversely; the crushing bucket moves upwards under the drive of the cylinder, and the crushing bucket moves downwards under the self gravity.

Preferably, the cross section of the inside wall of smashing the fill is the rectangle, two of them relative inside walls of smashing the fill are along the reverse trapezoidal that vertical direction arranged, two other relative lateral walls of smashing the fill are the rectangle of downward sloping, sliding connection has the scraper blade of arranging along the horizontal direction on the lateral wall of rectangle, the both ends of scraper blade extend to the both ends of the lateral wall of rectangle, the quantity of scraper blade sets up to two and the symmetric distribution is on the lateral wall of two rectangles, two be provided with wire rope between the opposite one end of scraper blade, wire rope's both ends are connected with the scraper blade through wire winding mechanism, wire rope and the laminating of smashing the trapezoidal lateral wall of fighting.

The invention has the beneficial effects that:

1. compared with the prior art, the Chinese herbal medicine formula disclosed by the invention has the advantages of safety, no toxic or side effect, no residue, capability of improving the utilization efficiency of feed, reducing the dead fetus of sow and mummified pig, improving the sow pregnancy rate, the weaned piglet immunity level, the weaned piglet number and the weaned body weight, reducing the diarrhea of piglets after early weaning, promoting the growth of the piglets and reducing the stress response.

2. Compared with the prior art, the device drives the crushing hopper to periodically rotate forward and move upward through the combination of the gravity of the fixing ring, the cylinder and the crushing hopper, and simultaneously moves downward in reverse, and simultaneously the rotation direction of the motor is always opposite to that of the crushing hopper, so that the bypass flow is generated, the traditional Chinese medicinal materials are positioned in the middle part of the crushing hopper but not on the side wall of the crushing hopper, and the crushing of the traditional Chinese medicinal materials is facilitated; in addition, the crushing hopper moves up and down, so that the blade can cut medicinal materials with different heights, and the cutting speed and the cutting quality of the medicinal materials are accelerated; the blade can also play a role in stirring, so that the traditional Chinese medicine powder is uniformly mixed.

3. Compared with the prior art, the centrifugal force is generated in the rotating process of the crushing hopper, so that the scraping plate and the steel wire rope move upwards to the upper limit position, when the crushing hopper commutates each time, the crushing hopper has a static moment, when the crushing hopper is static, the scraping plate and the steel wire move downwards to the lower limit position rapidly, the crushing hopper rotates forwards and reversely periodically, the centrifugal force periodically generates and disappears, and the scraping plate and the steel wire rope can automatically scrape powder on the inner side wall of the crushing hopper through the periodical up-down movement.

Drawings

Fig. 1 is a front view of the whole structure of embodiment 4;

FIG. 2 is a top view of the overall structure of example 4;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 shows the effect of feed additive Chinese herbal medicine on the reproductive performance index of lactating sows;

FIG. 5 shows the effect of adding Chinese herbal medicine on the biochemical index of serum of a lactating sow;

FIG. 6 shows the effect of adding Chinese herbal medicine on the antioxidant capacity of sow serum;

FIG. 7 shows the effect of adding Chinese herbal medicine on serum hormone levels in sows;

FIG. 8 shows the effect of adding Chinese herbal medicine on the serum immune function of sow.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific examples.

Example 1:

a Chinese herbal medicine feed additive for improving reproductive performance of sows is prepared from the following raw materials in parts by weight: 26kg of oyster powder, 15kg of codonopsis pilosula, 5kg of black matrimony vine, 16kg of glossy privet fruit, 4kg of akebia stem, 18kg of liquorice and 16kg of dandelion.

The embodiment also comprises a preparation method of the Chinese herbal medicine for improving the reproductive performance of the sow, which comprises the following steps:

step two: weighing seven Chinese herbal medicines dried in the first step according to the following weight parts: 26kg of oyster powder, 15kg of codonopsis pilosula, 5kg of black matrimony vine, 16kg of glossy privet fruit, 4kg of akebia stem, 18kg of liquorice and 16kg of dandelion;

step three: crushing the seven Chinese herbal medicines in the second step to 300 meshes and uniformly stirring;

And (3) adding the Chinese herbal medicine powder uniformly mixed in the step (IV) into the basic ration of the sow for feeding, wherein the adding proportion is 1% by weight.

Example 2

Example 2 differs from example 1 in that: and (3) adding the Chinese herbal medicine powder uniformly mixed in the step four into the basic ration of the sow for feeding, wherein the adding proportion is 0.5% by weight.

Example 3

Example 3 differs from example 1 in that: and (3) adding the Chinese herbal medicine powder uniformly mixed in the step four into the basic ration of the sow for feeding, wherein the adding proportion is 2% by weight.

Example 4

Example 4 differs from example 1 in that: the seven traditional Chinese medicines are crushed in the third step by adopting the following equipment: the grinding machine comprises a frame, wherein a grinding hopper (10) is arranged on the frame, a motor (40) is fixed on a part, above the grinding hopper (10), of the frame, an output shaft of the motor (40) is vertically downwards arranged, a rotating shaft (41) is fixed on the output shaft of the motor (40), the lower end of the rotating shaft (41) extends into the grinding hopper (10), a blade (42) is fixed at the lower end of the rotating shaft (41), and the rotating shaft (41) and the grinding hopper (10) are coaxially arranged; the bottom of the crushing hopper (10) is clamped with a sieve plate (13), and the size of the sieve plate (13) is 300 meshes; a fixed ring (30) is fixed on the frame, the outer side wall of the crushing bucket (10) is cylindrical, the fixed ring (30) is sleeved on the outer side of the crushing bucket (10), an inner thread is arranged on the inner side wall of the fixed ring (30), an outer thread matched with the inner thread is arranged on the outer side wall of the crushing bucket (10), when the crushing bucket (10) moves upwards, the inner thread and the outer thread are matched to enable the crushing bucket (10) to rotate forwards, and when the crushing bucket (10) moves downwards, the inner thread and the outer thread are matched to enable the crushing bucket (10) to rotate reversely; the bottom of smashing fill (10) is provided with annular groove (11), is fixed with cylinder (12) on being located the part of smashing fill (10) below in the frame, and the telescopic boom of cylinder (12) is vertical upwards to be arranged and extend to the inside of annular groove (11), and the quantity of cylinder (12) sets up to 2 and bilateral symmetry arranges, and when cylinder (12) extension, smashing fill (10) upward movement under the drive of cylinder (12), and when cylinder (12) stretched the shrink, smashing fill (10) downward movement under self gravity.

As shown in fig. 1, an upper mounting plate (16) and a lower mounting plate (14) are respectively fixed at the upper end and the lower end of the outer side wall of the crushing bucket (10), a reversing switch (17) with vertically downward arranged contacts is fixed at the lower end of the upper mounting plate (16), a forward rotating switch (15) with vertically upward arranged contacts is fixed at the upper end of the lower mounting plate (14), when the crushing bucket (10) moves to an upper limit position, the forward rotating switch (15) is pressed by a fixed ring (30), and when the crushing bucket (10) moves to a lower limit position, the reversing switch (17) is pressed by the fixed ring (30); the forward rotation switch (15) and the reverse rotation switch (17) are electrically connected with the motor (40) and the air cylinder (12) through the controller, and when the forward rotation switch (15) is pressed, the controller controls the air cylinder (12) to extend and the motor (40) to rotate reversely; when the reverse rotation switch (17) is pressed, the controller controls the cylinder (12) to contract and the motor (40) to rotate forward.

When the crushing bucket (10) rotates positively, the motor (40) rotates reversely to enable the blade (42) to rotate reversely, when the crushing bucket (10) rotates reversely, the motor (40) rotates positively to drive the blade (42) to rotate positively, the rotation directions of the crushing bucket (10) and the blade (42) are always opposite, and the winding flow is generated, so that the traditional Chinese medicinal materials are positioned in the middle part of the crushing bucket (10) but not on the side wall, and the crushing of the traditional Chinese medicinal materials is convenient. In addition, the crushing hopper (10) moves up and down to enable the blade (42) to cut medicinal materials with different heights, so that the cutting speed and the cutting quality of the medicinal materials are improved; the blade (42) can also stir the Chinese medicinal materials to make the powder uniformly mixed.

Because the friction of the traditional Chinese medicinal materials with the blades (42) and the inner side walls of the crushing hoppers (10) can generate heat in the cutting process, part of powder is heated and then adhered to the inner side walls of the crushing hoppers (10) to cause waste of the traditional Chinese medicinal materials, the cost is increased, particularly, the traditional Chinese medicinal materials adhered to the crushing hoppers (10) are difficult to clean after absorbing moisture, and the traditional method adopts manual cleaning, so that on one hand, the crushing hoppers (10) are large in size and inconvenient to clean, and labor is consumed, and on the other hand, workers are easy to cut by the blades (42) in the cleaning process.

Therefore, as shown in fig. 2 and 3, the cross section of the inside wall of the crushing bucket (10) is rectangular, the front and rear inside walls of the crushing bucket (10) are of inverted trapezoids arranged along the vertical direction, the left and right side walls of the crushing bucket (10) are of downward inclined rectangles, four sliding grooves (18) are symmetrically arranged at the front and rear ends of the left and right side walls of the crushing bucket (10), the sliding grooves (18) are parallel to the side walls of the crushing bucket (10) where the sliding grooves (18) are located, one sliding block (20) is slidably connected inside each sliding groove (18), one wire box (21) is fixed on each sliding block (20), the inside of each wire box (21) is hollow and is rotationally connected with a wire roller (22), a torsion spring is arranged on each wire roller (22), one end of each torsion spring is fixed on each wire roller (22), the other end of each torsion spring is fixed on each wire box (21), two wire boxes (21) located on the same side wall of the crushing bucket (10) are fixedly connected through a scraper (24), the sliding grooves (24) are arranged along the horizontal direction, a wire rope (23) is arranged between the opposite ends of the two scraper (24), and the two wire ropes (23) are respectively fixed on the corresponding wire rollers (23) on the two wire rollers (22).

When the crushing bucket (10) is stationary, the sliding block (20) is positioned at the bottom of the crushing bucket (10) under the action of gravity, and the left end and the right end of the steel wire rope (23) are wound in the wire box (21) under the action of the torsion spring; centrifugal force is generated when the crushing hopper (10) rotates, the centrifugal force received by the sliding block (20) generates an upward component force to enable the sliding block (20) to slide upwards along the sliding groove (18), and the scraping plates (24) scrape powder on the left side wall and the right side wall of the crushing hopper (10); simultaneously, wire rollers (22) at the left end and the right end of the same steel wire rope (23) rotate under the tension of the two sliding blocks (20) to pay off, the torsion spring stores energy, when the crushing bucket (10) is static again, the sliding blocks (20) are positioned at the bottom of the crushing bucket (10) under the action of gravity, the scraping plates (24) scrape powder on the left side wall and the right side wall of the crushing bucket (10) again, the left end and the right end of the steel wire rope (23) are wound inside the wire box (21) under the action force of the torsion spring, and the steel wire rope (23) scrapes traditional Chinese medicine powder on the front side wall and the rear side wall of the crushing bucket (10) again. The length of the steel wire rope (23) can correspondingly stretch and retract according to different widths of different heights of the front side wall and the rear side wall, so that powder on the inner side wall of the crushing bucket (10) is scraped by utilizing centrifugal force.

The specific implementation process is as follows:

in the initial state, the crushing bucket (10) is positioned at a lower limit position and the forward rotation switch (15) is pressed.

The Chinese medicinal materials are put into the crushing hopper (10), the power supply is switched on, the forward rotation switch (15) is pressed, the air cylinder (12) stretches, the motor (40) reversely rotates, and the crushing hopper (10) rotates forward and moves upwards; when the crushing bucket (10) moves to the upper limit position, the reversing switch (17) is pressed, the air cylinder (12) contracts and the motor (40) rotates positively, the crushing bucket (10) reverses under the self gravity and moves upwards to the lower limit position, the forward rotating switch (15) is pressed again, the steps are repeated continuously, crushing of traditional Chinese medicinal materials is achieved, and the traditional Chinese medicinal material powder meeting the requirement is automatically discharged through the screen plate (13).

Wherein, crushing fill (10) rotatory in-process produces centrifugal force, make scraper blade (24) and wire rope (23) upward movement upper extreme position, when crushing fill (10) are at every turn to the time, crushing fill (10) have a stationary moment, at crushing fill (10) stationary moment, scraper blade (24) and wire rope (23) rapid downward movement to the extreme position of below, crushing fill (10) periodic forward rotation and reversal, centrifugal force periodic generation and disappearance, scraper blade (24) and wire rope (23) periodic up-and-down movement all can be with crushing fill powder automatic scraping on (10) inside wall.

The experimental procedure was as follows:

1 materials and methods

1.1 test animals

80 healthy lactating sows with no diseases, close weight, no abnormal reproduction, same mating date, 2-child of multiparous and no obvious difference in reproductive performance are selected and fed in the same feeding environment. Lactating sows were randomly divided into 4 groups of 4 replicates each, 5 replicates each. The control group sow is fed with basic ration, the test group is respectively fed with compound Chinese herbal medicine additive ration with the levels of 0.5%, 1.0% and 2.0%, and the feeding management conditions of all groups are the same. The basic ration composition and the nutrition level are shown in Table 1.

TABLE 1basic ration composition and nutrient level Table 1Basic diet composition and nutritional level oflactating sows for lactating sows

1.2 Chinese herbal medicine additive

The Chinese herbal medicines for the test are purchased from local medicinal materials, and the formula components are respectively oyster powder 26%, dangshen 15%, black matrimony vine 5%, glossy privet fruit 16%, akebia stem 5%, licorice 17% and dandelion 16%, the 7 Chinese herbal medicines are mixed according to a certain proportion, crushed, sieved by a 300-mesh sieve, packaged and placed in a ventilation drying place for standby.

1.3 test time and place

The test was performed in Guizhou ecological agriculture limited, pre-test period 10d, and formal test period from 10d before birth to 35d after weaning for 45d.

1.4 feeding management

The lactating sow is fed with basic ration in a control group, and is fed with basic ration added with compound Chinese herbal medicine additive in a treatment group, and the test starts from 10 days before delivery, and is continuously fed to weaning at 35 days of age.

The temperature in the sow obstetric house is 21-28 ℃, and the sow is cleaned and disinfected every day, so that good ventilation is maintained. The sow is fed by 7d before delivery to a delivery house at 8:00 a.m. and 16:00 a.m. respectively, 2-4kg of the sow is fed daily according to the physical condition of the sow, no feed is fed on the delivery day, 1kg is fed 1d after delivery, and then the sow feed intake is increased daily until the sow starts to feed freely 1 week before weaning. During the test, the pig body is kept clean and sanitary by ensuring sufficient clean drinking water, and is immunized according to a normal immunization program.

1.5 test index determination

1.5.1 sow reproductive performance index

The number of live breastfeeding and birth weight of piglets are recorded in the test period, the total number of weaning heads, the weight of weaning individuals, the weight of weaning litter, the average weight of weaning litter, the thickness of weaning backfat and the interval from weaning to oestrus are recorded in the test period, and the average daily gain and the weaning survival rate are calculated.

1.5.2 determination of the Biochemical index of sow serum

After the raising experiment is finished, 5mL of blood is collected by each treatment group and each control group by a non-anticoagulation tube, the blood is centrifuged, serum is extracted, and the blood is preserved at-20 ℃ for detection. Albumin (ALB), neuropeptide Y (NPY), triiodothyronine (T3), tetraiodothyronine (T4), prolactin (PRL), follitropin (FollicleStimulating Hormone, FSH), luteinizing hormone ((Luteinizing Hormone, LH), immunoglobulin A (IgA), immunoglobulin M (Immunoglulolin M, igM), immunoglobulin G (Immunoglulolin G, igG), complement C3, complement C4 Interleukin-2 (Interlukin-2, IL-2) and Interleukin-4 (Interlukin-4, IL-4) are measured by enzyme-linked double antibody sandwich method, albumin, total Protein (TP), total cholesterol (T-CHO), glutathione peroxidase (GSH-Px), total antioxidant capacity (T-C) and propiolactone (AOC) are measured by colorimetric methods.

All the kits are purchased from Nanjing built bioengineering institute, all the experimental processes are carried out according to the description of the kit, and the detection instrument is a Baote synergy H4 multifunctional microplate detector in the United states.

1.5.3 economic benefits

And after the test is finished, calculating economic benefits according to the cost and income of each component.

1.6 data statistics and analysis

Data were classified using Excel 2010 software and SPSS 23.0 was used for data analysis of variance. Single-factor analysis of variance (One-way ANOVA) was performed using the General Linear Model (GLM), multiple comparisons were performed using the Duncan's method, and data analysis was performed using GraphPad Prism 9.

2 results and analysis

2.1 Effect of Chinese herbal medicine additives on sow reproductive performance index

The change in reproductive performance index of lactating sows is shown in figure 4. At the end of the feeding test, the Chinese herbal medicine is added into the diet to improve the survival rate of weaned piglets and shorten the interval from weaning to oestrus, wherein the survival rate of weaned piglets in a 1.0% level group is obviously higher than that in a control group, and the interval from weaning to oestrus in a 0.5% level group is obviously lower than that in the control group (P < 0.05). Along with the increase of the adding level of the Chinese herbal medicine in the diet, the survival rate of the weaned pigs is in a trend of increasing first and then decreasing later, and when the adding level of the Chinese herbal medicine in the diet is 1.0 percent, the higher survival rate of the weaned pigs can be obtained. The differences between the other index groups were not significant (P > 0.05). The data columns in fig. 4 are labeled with the same lowercase letters or no letters indicate that the difference is not significant (P > 0.05), and different lowercase letters indicate that the difference is significant (P < 0.05). The following is the same.

2.2 Effect of Chinese herbal medicine additives on the Biochemical index of sow serum

The biochemical index changes of the serum of the lactating sow are shown in figure 5. At the end of the feeding trial, the feed addition of the Chinese herbal medicine increased the serum TP, NPY content, with 1.0% level group TP significantly higher than the control group and 2.0% level group, and 1.0% and 2.0% level group NPY significantly higher than the control group and 0.5% level group (P < 0.05). TP is increased along with the increase of the Chinese herbal medicine adding level of the diet and then is reduced, and when the Chinese herbal medicine adding level is 1.0%, higher TP content can be obtained; NPY gradually increases with the increase of the Chinese herbal medicine addition level of the diet, and the difference among groups of other indexes is not obvious (P is more than 0.05).

2.3 Effect of Chinese herbal medicine additives on serum hormone levels in sow

The serum hormone level changes in lactating sows are shown in figure 6. At the end of the feeding trial, the feed addition of chinese herbal medicine increased serum FSH, PRL, LH, T and T4 levels, with FSH at 2.0% level significantly higher than control and 0.5% level, PRL at 1.0% and 2.0% level significantly higher than control and 0.5% level, LH at 2.0% level significantly higher than control, T3 at 1.0% level significantly higher than control, T4 at 2.0% level significantly higher than control and other test (P < 0.05). As the feed Chinese herbal medicine adding level increases, FSH, PRL, LH and T4 gradually increase, and the content is higher when the feed Chinese herbal medicine adding level is 2.0%. T3 is increased with the increase of the Chinese herbal medicine adding level of the diet and then is reduced, and when the Chinese herbal medicine adding level is 1.0%, the T3 content is higher.

2.4 Effect of Chinese herbal medicine additives on antioxidant Capacity of sow serum

The change in antioxidant capacity of the serum of the lactating sow is shown in FIG. 7. At the end of the feeding test, the feed-added Chinese herbal medicine increases the serum T-AOC level, wherein the T-AOC level of the 2.0% group is obviously higher than that of the control group and other test groups (P < 0.05), the total antioxidant capacity is gradually increased along with the increase of the feed Chinese herbal medicine addition level, the content is higher when the feed Chinese herbal medicine addition level is 2.0%, and the difference among the groups of other indexes is not obvious (P > 0.05).

2.5 Effect of Chinese herbal medicine additives on sow serum immune Functions

The serum immune function changes of lactating sows are shown in figure 8. At the end of the feeding trial, the feed addition of the herbal medicine increased serum complement C3, igG and IgM levels, with 1.0%, 2.0% level complement C3 levels significantly higher than the control, 3 experimental groups all had significantly higher IgG levels than the control, and 2.0% level IgM levels significantly higher than the control and 0.5% level (P < 0.05). With the increase of the addition level of the Chinese herbal medicine in the diet, the content of C3, igM and IgG in the sow serum is gradually increased.

2.6 economic benefit analysis

As shown in Table 2, except for deducting the cost of feed in lactation period and the necessary cost of veterinary medicine, each sow in the test group is increased by 262.89 yuan, 390.24 yuan and 219.93 yuan respectively compared with the control group. The added economic benefit of each group is 10.25%, 15.21% and 8.57%, respectively.

TABLE 2 cost and economic benefit analysis

Table 3 Cost and economic benefit analysis

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Note that: total revenue per sow = piglet unit price average weaning number; feed cost = total feed consumption of sows in lactation period × sow feed unit price + piglet nest feed unit price; profit aggregate = total revenue per sow- (feed cost + additive cost + veterinary drug cost).

According to the test research result, after the corresponding cost is deducted, the economic benefits of the Chinese herbal medicine test group are respectively 10.25%, 15.21% and 8.78% as compared with the control group, which shows that the compound Chinese herbal medicine additive can improve the economic benefits of pig farms.

Conclusion 3

The compound Chinese herbal medicine additive is added into the feed for sows in the lactation period, so that the oxidation resistance and the immunity of the bodies of the sows can be improved, the reproductive hormone level of the bodies can be regulated, the reproductive performance of the sows can be improved, the economic benefit of a pig farm can be improved, and the proper additive amount of the compound Chinese herbal medicine in the feed is 1%.

The foregoing is merely illustrative of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present invention, and therefore, the scope of the present invention shall be defined by the scope of the appended claims.

Claims

1. A Chinese herbal medicine feed additive for improving reproductive performance of sows is characterized in that: the material consists of the following raw materials in parts by weight: 22-30 parts of oyster powder, 12-18 parts of dangshen, 4-6 parts of black matrimony vine, 13-19 parts of glossy privet fruit, 4-6 parts of akebia stem, 14-20 parts of liquorice and 13-19 parts of dandelion.

2. The Chinese herbal medicine feed additive for improving reproductive performance of sows as claimed in claim 1, wherein: the material consists of the following raw materials in parts by weight: 26 parts of oyster powder, 15 parts of dangshen, 5 parts of black matrimony vine, 16 parts of glossy privet fruit, 5 parts of akebia stem, 17 parts of liquorice and 16 parts of dandelion.

3. The Chinese herbal medicine feed additive for improving reproductive performance of sows as claimed in claim 1, wherein: the material consists of the following raw materials in parts by weight: the Chinese herbal medicine feed additive is added into the basic ration of the sow for feeding, and the adding proportion is 0.5-2% by weight.

4. The Chinese herbal medicine feed additive for improving reproductive performance of sows as claimed in claim 1, wherein: the Chinese herbal medicine feed additive is added into the basic ration of the sow for feeding, and the adding proportion is 0.5% by weight.

5. The Chinese herbal medicine feed additive for improving reproductive performance of sows as claimed in claim 1, wherein: the Chinese herbal medicine feed additive is added into the basic ration of the sow for feeding, and the adding proportion is 1% by weight.

6. The Chinese herbal medicine feed additive for improving reproductive performance of sows as claimed in claim 1, wherein: the Chinese herbal medicine feed additive is added into the basic ration of the sow, and the adding proportion is 2% by weight.

7. A preparation method of a Chinese herbal medicine feed additive for improving reproductive performance of sows is characterized by comprising the following steps: the method comprises the following steps:

8. The method for preparing the Chinese herbal medicine feed additive for improving the reproductive performance of sows, which is characterized by comprising the following steps of: the seven traditional Chinese medicines are crushed in the third step by adopting the following equipment: the grinding machine comprises a frame, wherein a grinding hopper (10) is arranged on the frame, a blade (42) is arranged in the grinding hopper (10), and the blade (42) rotates under the drive of a motor (40); a screen plate (13) is arranged at the bottom of the crushing hopper (10); the crushing hopper (10) is driven by the driving mechanism to reciprocate up and down; the inside of the crushing hopper (10) is provided with a powder scraping device for scraping the powder on the inner side wall of the crushing hopper (10).

9. The method for preparing the Chinese herbal medicine feed additive for improving the reproductive performance of sows, which is characterized by comprising the following steps of: the driving mechanism comprises a fixed ring (30) fixed on the frame, the outer side wall of the crushing bucket (10) is cylindrical, the fixed ring (30) is sleeved on the outer side of the crushing bucket (10), an internal thread is arranged on the inner side wall of the fixed ring (30), an external thread matched with the internal thread is arranged on the outer side wall of the crushing bucket (10), when the crushing bucket (10) moves upwards, the internal thread and the external thread are matched to enable the crushing bucket (10) to rotate forwards, and when the crushing bucket (10) moves downwards, the internal thread and the external thread are matched to enable the crushing bucket (10) to rotate reversely; the crushing bucket (10) moves upwards under the drive of the air cylinder (12), and the crushing bucket (10) moves downwards under the self gravity.

10. The method for preparing the Chinese herbal medicine feed additive for improving the reproductive performance of sows, which is characterized by comprising the following steps of: the cross section of the inside wall of smashing fill (10) is the rectangle, two of them relative inside walls of smashing fill (10) are the trapezoid of arranging along vertical direction, two other relative lateral walls of smashing fill (10) are the rectangle of downward sloping, sliding connection has scraper blade (24) of arranging along the horizontal direction on the lateral wall of rectangle, the both ends of scraper blade (24) extend to the both ends of the lateral wall of rectangle, the quantity of scraper blade (24) sets up to two and symmetric distribution on the lateral wall of two rectangles, two be provided with wire rope (23) between the opposite one end of scraper blade (24), wire rope (23) both ends are connected with scraper blade (24) through wire winding mechanism, wire rope (23) are laminated with the trapezoid of smashing fill (10) lateral wall.