A traditional Chinese medicine additive for improving boar semen quality, and its preparation method and application

Abstract

The present invention discloses a traditional Chinese medicine additive capable of improving the quality of boar semen. The additive comprises the following components, expressed by weight: 6 parts of Patchouli, 6 parts of dried tangerine peel, 8 parts of Elsholtzia ciliata, 6 parts of Artemisia annua, 4 parts of Glycyrrhiza uralensis, 6 parts of Perilla frutescens, 6 parts of Atractylodes macrocephala, 6 parts of Magnolia officinalis, 6 parts of Radix Rehmanniae, and 6 parts of Bamboo Leaf. Adding the additive to boar diets can alleviate sperm damage caused by heat stress in boars under high temperature and high humidity in summer, comprehensively improve boar semen quality, enhance boar fertility in summer, and thereby increase downstream production efficiency of pig farms.

Description

Technical Field

[0001] The present invention relates to the field of boar breeding, and in particular to a traditional Chinese medicine additive for improving boar semen quality, and a preparation method and application thereof. Background Art

[0002] Influenced by factors such as disease transmission and cost control, pig farming has gradually become more large-scale and intensive. Within large-scale farming, artificial insemination (AI) can significantly reduce pathogen transmission, improve efficiency, and save costs. However, the effectiveness of AI is not only influenced by the proper procedures of staff during estrus and insemination, but also significantly influenced by the quality of the boar semen used.

[0003] Due to the high temperatures of summer, boar semen quality often declines significantly, often manifesting as increased sperm deformity and decreased sperm motility. Using low-quality semen can negatively impact the production efficiency of pig farms during the breeding phase. Therefore, implementing appropriate measures to improve boar semen quality during the hot season has a significant impact on the production efficiency of breeding farms. Summary of the Invention

[0004] The purpose of the present invention is to provide a traditional Chinese medicine additive that can be used to improve the quality of boar semen, so as to solve the problem that intensive pig houses are usually affected by high temperature and high humidity in summer and are very likely to cause heat stress in pigs in such an environment, which has an adverse effect on semen quality, to alleviate the sperm damage caused by heat stress in boars in high temperature and high humidity environments, and comprehensively improve the quality of boar semen.

[0005] According to a first aspect of the present invention, a traditional Chinese medicine additive for improving boar semen quality is provided. The additive comprises the following components, expressed in parts by weight: 6 parts Patchouli Radix Agastache rugosa, 6 parts Tangerine Peel, 8 parts Elsholtzia ciliata, 6 parts Artemisia annua, 4 parts Licorice Root, 6 parts Perilla frutescens, 6 parts Atractylodes macrocephala, 6 parts Magnolia officinalis, 6 parts Rehmannia glutinosa, and 6 parts Bamboo Leaf. Adding this additive to boar diets can alleviate sperm damage caused by heat stress in boars exposed to high temperature and humidity in summer, comprehensively improve boar semen quality, and enhance downstream pig farm production efficiency.

[0006] According to a second aspect of the present invention, there is provided a method for preparing the above-mentioned additive, the method comprising the following steps:

[0007] 1) Weigh each component according to the weight of the raw materials, wash and dry them separately, and then mix them;

[0008] 2) The mixed raw materials are coarsely crushed, passed through an 80-mesh sieve, and dried at 60-80°C for 3-4 hours to obtain a coarse powder;

[0009] 3) The coarse powder is further pulverized by an ultrafine grinder at a low temperature of 0 to 8° C. and passed through a 1000-mesh sieve to obtain the additive.

[0010] This preparation method uses modern ultrafine grinding technology to grind the traditional Chinese medicine into ultrafine particles, which can fully release the active ingredients in the Chinese herbal medicine, facilitate animal absorption, and better exert the effect of the compound.

[0011] According to a third aspect of the present invention, there is provided a use of the above additive in improving the quality of boar semen in summer.

[0012] In certain embodiments, improving boar semen quality refers to improving boar sperm motility in summer.

[0013] In certain embodiments, improving boar semen quality refers to reducing boar sperm deformity rate in summer.

[0014] In certain embodiments, improving boar semen quality refers to increasing the forward motility rate of boar sperm in summer.

[0015] In certain embodiments, improving boar semen quality refers to alleviating the decrease in sperm density in summer.

[0016] According to a fourth aspect of the present invention, a method for preparing a basal boar diet is provided. The method comprises adding 1% of the aforementioned traditional Chinese medicine additive for improving boar semen quality to the basal boar diet. This method can improve semen quality in high-temperature and high-humidity summer environments, thereby increasing downstream pig farm production efficiency.

[0017] In certain embodiments, the boar is a Duroc boar.

[0018] Beneficial effects of the present invention:

[0019] 1. Provided is an additive that can alleviate sperm damage caused by heat stress in boars exposed to high temperature and high humidity in summer, and comprehensively improve boar semen quality. The additive comprises the following components, expressed in parts by weight: 6 parts of Patchouli Radix, 6 parts of Tangerine Peel, 8 parts of Elsholtzia Cinnamomum, 6 parts of Artemisia Annua, 4 parts of Licorice Root, 6 parts of Perilla frutescens, 6 parts of Atractylodes Rhizome, 6 parts of Magnolia Bark, 6 parts of Rehmannia Glutinosa, and 6 parts of Bamboo Leaf. This additive can improve semen quality in boars exposed to high temperature and high humidity in summer, thereby increasing the production efficiency of downstream pig farms.

[0020] 2. A preparation method for Chinese herbal medicine additives is provided. By using modern ultrafine grinding technology to grind the Chinese herbal medicine into ultrafine particles, the active ingredients in the Chinese herbal medicine can be fully released, which is beneficial for animal absorption and better exerts the effect of the compound.

[0021] 3. Provides an additive that can alleviate the sperm damage caused by heat stress in boars under high temperature and high humidity environments, and comprehensively improve the quality of boar semen. The additive can improve the quality of boar semen in summer, namely, improve the motility of boar sperm, reduce the rate of boar sperm deformity, increase the forward motility rate of boar sperm, and alleviate the decrease in sperm density, thereby improving the reproductive efficiency of boars in summer and improving the summer production efficiency of pig farms.

[0022] 4. Provides an application of a traditional Chinese medicine additive that can improve the quality of boar semen in the preparation of boar basic diet. Through this application, the semen quality of boars in high temperature and high humidity environments in summer can be improved, which is beneficial to improving the production efficiency of downstream pig farms. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Comparison results of semen quality parameters between the Chinese herbal compound powder group 1 and the control group: * indicates significant difference before and after feeding (p<0.05), ** indicates extremely significant difference before and after feeding (p<0.01);

[0024] Figure 2 Comparison results of semen quality parameters between the two groups of Chinese herbal compound powder and the control group: * indicates significant difference before and after feeding (p<0.05), ** indicates extremely significant difference before and after feeding (p<0.01);

[0025] Figure 3 Comparison results of semen quality parameters between the three groups of Chinese herbal compound powder and the control group: * indicates significant difference before and after feeding (p<0.05), ** indicates extremely significant difference before and after feeding (p<0.01);

[0026] Figure 4 Comparison results of semen quality parameters between the four groups of Chinese herbal compound powder and the control group: * indicates significant difference before and after feeding (p<0.05), ** indicates extremely significant difference before and after feeding (p<0.01);

[0027] Figure 5 Comparison results of semen quality-related parameters between the five groups of Chinese herbal compound powder and the control group: * indicates significant difference before and after feeding (p<0.05), ** indicates extremely significant difference before and after feeding (p<0.01). DETAILED DESCRIPTION

[0028] The invention is described in further detail below.

[0029] Test animals: 42 healthy Duroc boars of similar body condition

[0030] Experimental location and time: The experiment was conducted at a boar station in Guigang, Guangxi from August 9 to September 19, 2022. The experimental period was 42 days, and semen samples were collected before and after feeding.

[0031] The composition of the Chinese medicine compound powder 1 (expressed by weight): 6 parts of Patchouli, 6 parts of dried tangerine peel, 8 parts of Elsholtzia, 6 parts of Artemisia annua, 4 parts of Licorice, 6 parts of Cyperus rotundus, 6 parts of Atractylodes, 6 parts of Magnolia officinalis, 6 parts of Rehmannia glutinosa, and 6 parts of Bamboo Leaf.

[0032] The composition of the Chinese medicine compound powder 2 is: 2 parts of Patchouli, 2 parts of Atractylodes, 2 parts of Magnolia officinalis, 2 parts of Tangerine peel, 4 parts of Coix seeds, and 2 parts of Licorice.

[0033] The composition of the Chinese medicine compound powder 3 is as follows: 4 parts of Eucommia ulmoides, 4 parts of Ligustrum lucidum fruit, 2 parts of Cuscuta australis, 1 part of Ophiopogon japonicus, 1 part of Anemarrhena asphodeloides, 1 part of Rehmannia glutinosa, 1 part of Phellodendron chinense, 2 parts of Licorice root, 1 part of Atractylodes lancea, and 2 parts of Coix seed.

[0034] The composition of Chinese medicine compound powder 4 is as follows: 8 parts of wolfberry fruit, 8 parts of dodder seed, 4 parts of raspberry fruit, 1 part of schisandra fruit, 2 parts of plantain seed, 2 parts of anemarrhena, and 1 part of elsholtzia.

[0035] The formula of Chinese medicine compound powder 5 is: 2 parts of perilla leaves, 2 parts of dried tangerine peel, 3 parts of raw hawthorn, 4 parts of raw malt, 3 parts of dandelion, 2 parts of plantain seeds, 2 parts of codonopsis pilosula, 2 parts of yam, 3 parts of wolfberry, and 3 parts of Morinda officinalis.

[0036] Preparation method of Chinese medicine compound powder 1-5:

[0037] The raw materials required for each group of compound are washed, dried, and mixed according to the ratio;

[0038] Then coarsely grind: grind the mixed raw materials coarsely, pass through an 80-mesh sieve, place in a dryer, and dry at 60-80°C for 3-4 hours to obtain coarse powder;

[0039] Then, nano-crushing is performed: the obtained coarse powder is further crushed by an ultrafine grinder at a low temperature of 0 to 8°C, passed through a 1000-mesh sieve, and the compound additive is obtained. After passing the particle size test, it is divided into parts for use.

[0040] The above formula is processed using modern ultrafine grinding technology, which grinds the traditional Chinese medicine into ultrafine particles, which can fully release the active ingredients in the Chinese herbal medicine, facilitate animal absorption, and better exert the effect of the compound.

[0041] Feeding and Management: The control group was fed a basal diet, 2.5 kg of feed per feeding, once daily; the experimental groups were fed a basal diet supplemented with 1% Chinese herbal compound powder (e.g., the experimental group supplemented with 1% Chinese herbal compound powder 1 was designated "Chinese herbal compound powder group 1," the experimental group supplemented with 1% Chinese herbal compound powder 2 was designated "Chinese herbal compound powder group 2," and so on. The experimental groups were designated "Chinese herbal compound powder group 1," "Chinese herbal compound powder group 2," "Chinese herbal compound powder group 3," "Chinese herbal compound powder group 4," and "Chinese herbal compound powder group 5," respectively). The experiment lasted 6 weeks and 42 days, and the feeding cycle generally coincided with the boars' spermatogenesis cycle. The temperature and humidity in the pig house are recorded four times a day, at 8:00, 11:30, 14:30 and 17:30. The average daily temperature is 26-28℃, and the average daily humidity is 70%-95%. The temperature is higher between 11:30 and 14:30.

[0042] Semen quality related parameters detection:

[0043] This study used 42 Duroc boars, divided equally into six groups: one control group and five experimental groups: Chinese herbal compound powder group 1, Chinese herbal compound powder group 2, Chinese herbal compound powder group 3, Chinese herbal compound powder group 4, and Chinese herbal compound powder group 5. Semen was collected using the hand grip method before and after feeding, between 8:00 and 11:00 AM.

[0044] The collected semen was then tested for semen quality parameters using a computer-assisted semen analysis system (CASA) (Table 1-Table 5 / Figure 1-Figure 5 ), including semen volume, sperm density, sperm motility, deformity rate, and sperm forward motility rate. The operation is as follows:

[0045] 1. Preparation before the test: open and preheat the CASA detection system and preheat the constant temperature heating table at 37℃; 2. Add sample: gently shake the collected semen sample thoroughly, use a pipette to draw 10μL of semen sample and inject it into the sperm detection plate cavity, ensuring that there are no vacuoles in the cavity; 3. Activate sperm: place the sperm detection plate on the heating table and let it stand at 37℃ for 3 minutes; 4. Detection: transfer the sperm detection plate to the detection system stage, select the initial field of view after sample injection, click to start the test, and the system automatically selects 5 different fields of view to collect and analyze the sperm status and movement in the field of view; 5. Record various indicator data.

[0046] SPSS 26.0 was used to perform paired t-test on the test data. The results of the comparison between each experimental group and the control group are shown in Tables 1-5:

[0047] Table 1 Semen volume data before and after feeding

[0048]

[0049]

[0050] Note: * indicates significant difference before and after feeding, p<0.05.

[0051] As shown in Table 1, after feeding, the semen volume of group 1 of the Chinese herbal compound powder was increased by 20.13% after being added to the diet, and the difference before and after feeding was not significant (p=0.1758); the semen volume of group 2 of the Chinese herbal compound powder was increased by 17.17%, and the difference before and after feeding was not significant (p=0.1836); the semen volume of group 3 of the Chinese herbal compound powder decreased significantly by 23.24%, and the difference before and after feeding was significant (p=0.0357); the semen volume of group 4 of the Chinese herbal compound powder was increased by 13.85%, and the difference before and after feeding was not significant (p=0.0758); the semen volume of group 5 of the Chinese herbal compound powder was increased by 9.86%, and the difference before and after feeding was not significant (p=0.4621); while the semen volume of the control group increased by 2.13%, and the difference was not significant (p=0.9186). In the above data, except for the significant decrease in semen volume in group 3 of the Chinese herbal compound powder (p<0.05), the changes in semen volume in the other groups before and after feeding were not significant (p>0.05). However, the increase in semen volume in group 1 of the Chinese herbal compound powder was the largest after feeding, reaching 20.13%. This shows that adding 1% of group 1 of the Chinese herbal compound powder to the diet can improve the heat stress of boars under high temperature and high humidity in summer, and can increase the semen volume of boars to a certain extent.

[0052] Table 2 Sperm density data before and after feeding

[0053]

[0054] Note: * indicates significant difference before and after feeding, p<0.05.

[0055] As shown in Table 2, after feeding, although the semen density of the Chinese herbal compound powder 1 group decreased by 11.35%, the difference was not significant (p=0.5202); after feeding with Chinese herbal compound powder 2, the semen density decreased by 17.58%, but the difference was not significant (p=0.1787); after feeding with Chinese herbal compound powder 3, the semen density decreased by 8.14%, but the difference was not significant (p=0.5454); after feeding with Chinese herbal compound powder 4, the semen density decreased by 25.64%, and the difference was significant (p=0.0366); after feeding with Chinese herbal compound powder 5, the semen density decreased by 15.63%, but the difference was not significant (p=0.3520); the semen density of the control group decreased by 23.05%, but the difference was not significant (p=0.2077). The above semen density data indicate that semen density decreased before and after feeding. This suggests that the high temperature and humidity during the summer months of August and September (the experimental period) caused heat stress in the boars, leading to lower semen density. The decrease in semen density in Group 4 of the Chinese herbal compound powder was greater than that in the control group, and semen density was significantly lower after feeding (p < 0.05). There were no significant differences before and after feeding in the other experimental groups (p > 0.05), and the decrease in semen density in Groups 1, 2, 3, and 5 of the Chinese herbal compound powder was less than that in the control group. Furthermore, although semen density decreased in the experimental groups, the magnitude of the decrease was much smaller than that in the control group. In particular, the decrease in semen density in Groups 1 and 3 of the Chinese herbal compound powder after feeding was smaller. Combined with the data in Table 1, it is speculated that the smaller decrease in semen density in Group 3 of the Chinese herbal compound powder after feeding may be due to the significantly smaller semen volume in Group 3 of the Chinese herbal compound powder after feeding. Therefore, based on the data in Table 1 and Table 2, it can be shown that adding 1% of the first formula of Chinese herbal compound powder to the diet can improve the heat stress of boars under high temperature and high humidity in summer, and to a certain extent alleviate the decrease in semen density of boars caused by high temperature and high humidity weather.

[0056] Table 3 Sperm motility data before and after feeding

[0057]

[0058]

[0059] Note: ** in the same line indicates that the difference before and after feeding is extremely significant (p<0.01); * in the same line indicates that the difference before and after feeding is significant (p<0.05).

[0060] As shown in Table 3, after feeding, the sperm motility of the Chinese herbal compound powder group 1 was extremely significantly increased by 5.87%, with an extremely significant difference (P=0.0025); the sperm motility of the Chinese herbal compound powder group 2 was increased by 1.92%, with no significant difference (P=0.2481); the sperm motility of the Chinese herbal compound powder group 3 was increased by 2.73%, with a significant difference (P=0.0427); the sperm motility of the Chinese herbal compound powder group 4 was increased by 0.77%, with no significant difference (P=0.6790); the sperm motility of the Chinese herbal compound powder group 5 was increased by 3.94%, with no significant difference (P=0.1633); while the sperm motility of the control group was increased by 0.63%, with no significant difference (p=0.9063). The above data show that while sperm motility improved to a certain extent in both the experimental and control groups after feeding, the differences in the pre- and post-feeding values for TCM Compound Powder Groups 2, 4, and 5 were similar to those in the control group (p>0.05). However, sperm motility in TCM Compound Powder Group 1 significantly increased by 5.87% after feeding (p<0.01), significantly outperforming TCM Compound Powder Group 3. This suggests that adding 1% TCM Compound Powder Group 1 to the diet can alleviate heat stress and semen quality in boars exposed to high summer temperatures and humidity, significantly improving sperm motility.

[0061] Table 4 Sperm deformity rate data before and after feeding

[0062]

[0063] Note: ** indicates that the difference before and after feeding is extremely significant, p<0.01.

[0064] As shown in Table 4, after feeding, the sperm deformity rate of the Chinese herbal compound powder group 1 was extremely significantly reduced by 37.06%, with an extremely significant difference (p=0.0053); the sperm deformity rate of the Chinese herbal compound powder group 2 was reduced by 4.85%, with no significant difference (p=0.7940); the sperm deformity rate of the Chinese herbal compound powder group 3 was reduced by 23.30%, with no significant difference (p=0.4042); the sperm deformity rate of the Chinese herbal compound powder group 4 was reduced by 12.97%, with no significant difference (p=0.3947); the sperm deformity rate of the Chinese herbal compound powder group 5 was increased by 6.45%, with no significant difference (p=0.7610); while the sperm deformity rate of the control group was reduced by 19.44%, with no significant difference (p=0.2292). The above data show that after feeding the 5th group of Chinese herbal compound powder, the sperm deformity rate actually increased. After feeding the 2-4th group of Chinese herbal compound powder and the control group, the sperm deformity rate decreased to a certain extent, but the difference was not significant (p>0.05). After feeding the 1st group of Chinese herbal compound powder, the sperm deformity rate was significantly reduced by 37.06% (p<0.01). This shows that adding 1% of the 1st group of Chinese herbal compound powder to the diet can improve heat stress and semen quality in boars under high temperature and high humidity in summer, and significantly reduce the sperm deformity rate.

[0065] Table 5 Sperm forward motility data before and after feeding

[0066]

[0067] Note: * indicates significant difference before and after feeding, p<0.05.

[0068] As shown in Table 5, after feeding, the sperm forward motility rate of the Chinese herbal compound powder group 1 was significantly increased by 29.69%, with a significant difference (p=0.0239); the sperm forward motility rate of the Chinese herbal compound powder group 2 was increased by 2.42%, with no significant difference (p=0.7810); the sperm forward motility rate of the Chinese herbal compound powder group 3 was decreased by 4.93%, with no significant difference (p=0.6077); the sperm forward motility rate of the Chinese herbal compound powder group 4 was decreased by 2.49%, with no significant difference (p=0.5719); the sperm forward motility rate of the Chinese herbal compound powder group 5 was increased by 6.68%, with no significant difference (p=0.5923); the sperm forward motility rate of the control group was increased by 1.22%, with no significant difference (p=0.8808). The above data show that after feeding, the sperm forward motility rate of groups 3 and 4 of the Chinese herbal compound powder was reduced, indicating that it is not conducive to the forward motility of sperm; and although the sperm forward motility rate of groups 2 and 5 of the Chinese herbal compound powder and the control group was improved to a certain extent after feeding, the difference was not significant (p>0.05); and the sperm forward motility rate of group 1 of the Chinese herbal compound powder was significantly increased by 29.69% (p<0.05), indicating that adding 1% of the Chinese herbal compound powder group 1 to the diet can improve the heat stress and semen quality of boars under high temperature and high humidity in summer, and significantly improve the sperm forward motility rate.

[0069] In order to more intuitively present the comparison results of the Chinese medicine compound powder groups 1-5 and the control group, the attached Figure 1-5 ,like Figure 1-5 As shown:

[0070] Figure 1 Comparison of semen quality parameters between the TCM compound powder group 1 and the control group revealed no significant changes in semen quality parameters before and after the trial feeding (P>0.05). However, after one spermatogenic cycle, the experimental group, which received an additional 1% TCM compound powder 1, showed a significant increase in sperm motility (P<0.01), a significant decrease in the deformity rate (P<0.01), and a significant increase in sperm forward motility (P<0.05). Furthermore, the TCM compound powder 1 group significantly increased semen volume compared to the control group. Furthermore, feeding TCM compound powder 1 alleviated the overall decline in sperm density during hot and humid summer weather.

[0071] Figure 2The results are a comparison of semen quality-related parameters between the Chinese herbal compound powder group 2 and the control group. The results show that, like the control group, there were no significant changes in semen quality parameters before and after the trial feeding in the Chinese herbal compound powder group 2 (P>0.05), indicating that the Chinese herbal compound powder group 2 had no effect on improving the semen quality of boars under high temperature and high humidity in summer.

[0072] Figure 3 The results are a comparison of semen quality-related parameters between the Chinese herbal compound powder group 3 and the control group. The results show that: there was no significant change in the semen quality parameters of the control group before and after the trial feeding (P>0.05). Although the sperm motility can be significantly improved after feeding with the Chinese herbal compound powder 3 (P<0.05), the semen volume was significantly decreased after feeding (P<0.05). The sperm density and sperm forward motility were the same as those in the control group, with no significant changes (P>0.05), but the sperm forward motility rate decreased by 4.93%. Therefore, the Chinese herbal compound powder group 3 is not suitable for improving boar semen quality under high temperature and high humidity in summer.

[0073] Figure 4 The results are a comparison of semen quality-related parameters between the four groups of Chinese herbal compound powders and the control group. The results show that the sperm density of the four groups was significantly reduced (P<0.05), and the other parameters were the same as those of the control group, with no significant differences before and after feeding (P>0.05). However, the sperm forward motility rate was reduced by 2.49%, indicating that the four groups of Chinese herbal compound powders had no effect on improving the semen quality of boars under high temperature and high humidity in summer.

[0074] Figure 5 The results are a comparison of semen quality-related parameters between the Chinese herbal compound powder group 5 and the control group. The results show that: the Chinese herbal compound powder group 5 is the same as the control group, and there is no significant difference in the parameters before and after feeding (P>0.05), but the sperm density of the Chinese herbal compound powder group 5 decreased by 15.63% and the deformity rate increased by 6.45% after feeding, indicating that the formula of the Chinese herbal compound powder group 5 is not suitable for improving the semen quality of boars under high temperature and high humidity in summer.

[0075] The above test results show that among the five formulated compound prescriptions, the Chinese herbal compound powder formula 1 has the most obvious effect on improving the quality of boar semen. Feeding this formula can significantly improve the sperm motility of boars, significantly increase their sperm forward motility rate, and significantly reduce the sperm deformity rate. At the same time, it also has a certain alleviating effect on the decrease in boar sperm density in high temperature seasons.

[0076] Compound Chinese medicine powder 1 uses a combination of heat-clearing and dampness-drying herbs. Patchouli aromatically dissipates dampness, dispels summer heat and relieves exterior symptoms; Elsholtzia ciliata promotes diaphoresis, relieves summer heat, promotes diuresis and dissipates dampness, warms the stomach and regulates the middle; Cyperus rotundus similarly dissipates dampness, relieves summer heat; Artemisia annua clears heat and relieves summer heat; Atractylodes macrocephala strengthens the spleen, dissipates dampness, and relieves depression; Magnolia officinalis warms the middle and eliminates dampness; Rehmannia root nourishes yin and clears heat, cooling the blood and replenishing blood; Tangerine peel regulates qi and regulates the middle, dissipates dampness and resolves phlegm; Bamboo leaf clears heart fire and relieves restlessness and fever; and Licorice root both clears heat and detoxifies and harmonizes the other herbs. The combined effects of these herbs synergize, and feeding this compound Chinese medicine powder during high temperature and humidity seasons can significantly improve boar semen quality and, to a certain extent, mitigate the decline in semen density.

Claims

1. A Chinese medicinal additive for improving the quality of boar semen, wherein: The additives are represented by the following components in parts by weight: The additive comprises 6 parts of Patchouli, 6 parts of dried tangerine peel, 8 parts of Elsholtzia ciliata, 6 parts of Artemisia annua, 4 parts of Licorice, 6 parts of Cyperus rotundus, 6 parts of Atractylodes macrocephala, 6 parts of Magnolia officinalis, 6 parts of Radix Rehmanniae, and 6 parts of Bamboo Leaf. The additive can improve the quality of boar semen in summer.

2. The method for preparing the additive according to claim 1, wherein: The method comprises the following steps: 1) Weigh each component according to the weight of the raw materials, wash and dry them separately, and then mix them; 2) The mixed raw materials are coarsely crushed, passed through an 80-mesh sieve, and dried at 60-80°C for 3-4 hours to obtain a coarse powder; 3) The coarse powder is further crushed by an ultrafine grinder at a low temperature of 0-8°C and passed through a 1000-mesh sieve to obtain the additive.

3. Use of the additive according to claim 1 in preparing feed for improving the semen quality of boars in summer.

4. The use according to claim 3, wherein: The improving of boar semen quality in summer refers to improving boar sperm motility in summer.

5. The use according to claim 3, wherein: The improving of boar semen quality in summer refers to reducing boar sperm deformity rate in summer.

6. The use according to claim 3, wherein: The improving of summer boar semen quality refers to improving the forward motility rate of boar sperm in summer.

7. The use according to claim 3, wherein: The improving of boar semen quality in summer refers to alleviating the reduction of sperm density in summer.

8. Use of the additive according to claim 1 in preparing a basic diet for boars, wherein: The application is to add 1% of the above-mentioned traditional Chinese medicine additive for improving the quality of boar semen to the basic daily diet of boars.

9. The use according to any one of claims 3 to 8, wherein: The boar is a Duroc boar.

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