CN111165678A

CN111165678A - Laying hen feed additive prepared by taking eucommia ulmoides as raw material and preparation method

Info

Publication number: CN111165678A
Application number: CN202010024712.2A
Authority: CN
Inventors: 岳慧; 胡佃鹏; 徐伟杰; 刘倩倩
Original assignee: Shandong Beilong Duzhong Biological Engineering Co ltd
Current assignee: Shandong Beilong Duzhong Biological Engineering Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-05-19

Abstract

The invention belongs to the technical field of feeds, and particularly relates to a feed additive prepared by taking eucommia ulmoides as a raw material and a preparation method thereof. The invention provides a feed additive prepared by taking eucommia ulmoides as a raw material, which is characterized by comprising the following raw materials in parts by weight: 40-60 parts of eucommia leaves, 5-15 parts of honeysuckle, 20-30 parts of mulberry leaves and 10-20 parts of eucommia seed meal. According to the invention, through a fermentation process, the raw materials taking the eucommia ulmoides leaves as the main materials are fermented, and compared with the feed additive which is obtained by directly crushing the eucommia ulmoides leaves, the feed greatly increases the digestibility, improves the absorption amount of nutrient components, avoids the waste caused by incapability of digesting and absorbing the eucommia ulmoides leaves, and can more comprehensively absorb and utilize the active components in the eucommia ulmoides leaves; the improved feed improves the taste and increases the appetite of the poultry, thereby further improving the laying rate and increasing the breeding income.

Description

Laying hen feed additive prepared by taking eucommia ulmoides as raw material and preparation method

Technical Field

The invention belongs to the technical field of feeds, and particularly relates to a feed additive prepared by taking eucommia ulmoides as a raw material, and a preparation method of the feed additive.

Background

The folium Eucommiae and cortex Eucommiae have the same effective components and pharmacological action, and the separated and identified organic compounds have more than 70 kinds, and inorganic mineral elements not less than 15 kinds, which can be roughly classified into iridoid, lignanoid, flavonoid, gutta Percha, phenylpropanoids, phenols, amino acids, polysaccharides, fatty acids and vitamins. If it is used as feed, the active ingredients contained therein will certainly have a positive effect on the health of the poultry or livestock. The research and development center of economic forests of Chinese forest academy of sciences pubic China pubic text publishes a paper 'research progress of eucommia bark feed additives', the paper indicates that eucommia leaves have the effect of improving the healthy growth and production performance of livestock like eucommia bark, and the eucommia leaves are rich in resources and have no great influence on tree bodies after being picked in a proper amount, so that the possibility is provided for the development of eucommia bark functional feed.

The following documents disclose feeds using eucommia ulmoides leaves as a raw material:

CN105211506A discloses a eucommia ulmoides leaf fermented feed and a production method thereof, the method disclosed in the patent document comprises: (1) mashing wet eucommia ulmoides dregs after leaching eucommia ulmoides, adding bean pulp, rapeseed meal, corn flour and wheat bran, and uniformly mixing; (2) adding zymophyte liquid into the mixture obtained in the step (1), uniformly mixing, stacking in a cool and dry place, compacting, sealing and fermenting for two days, then filling into a feed bag with a plastic inner membrane, compacting and sealing, and placing in the cool and dry place for anaerobic fermentation for 14-16 days.

The eucommia ulmoides leaf fermented feed obtained by the method has the following defects: 1. the fermentation time is longer; 2. is greatly influenced by the external environment; 3. the easy infection of wild virus, i.e. wild bacteria, during the operation process means that the operation process is polluted by the environment, which causes the invasion of foreign bacteria.

The application of eucommia ulmoides meal powder in broiler feed discloses that after eucommia ulmoides samara is shelled, nutlets are crushed into 30-40 meshes, and an extraction product obtained after linolenic acid oil is separated by supercritical carbon dioxide is sieved by a 40-mesh sieve to obtain the eucommia ulmoides seed meal feed additive.

The above documents directly use eucommia bark meal as a feed additive, and the inventor finds that if eucommia bark leaves are directly used as the feed additive, the digestibility of poultry on the eucommia bark meal is not high.

Therefore, there is a need to improve the above-mentioned drawbacks, and to provide a feed additive which is prepared from eucommia ulmoides oliv and can significantly improve the digestibility of poultry or livestock, thereby improving the laying rate of laying hens.

Disclosure of Invention

In order to solve the technical problems, the invention provides the feed additive which is prepared by taking the eucommia leaves and the eucommia seed meal as raw materials and other pure natural plants as auxiliary materials through fermentation together, and the feed additive can obviously improve the digestibility of poultry and has a certain positive effect on preventing the poultry from suffering from diseases; the laying rate of the laying hens can be obviously improved;

the invention also relates to a preparation method of the feed additive.

The invention is realized by the following technical scheme:

the invention provides a feed additive prepared by taking eucommia ulmoides as a raw material, wherein the eucommia ulmoides is eucommia ulmoides leaves and eucommia ulmoides seed meal.

The weight ratio of the eucommia leaves to the eucommia seed meal is 4-6: 1 to 2.

Preferably, the weight ratio of the eucommia leaves to the eucommia seed meal to the feed additive is as follows: 5-8: 7.5 to 12.5.

The eucommia ulmoides leaves and the eucommia ulmoides seed meal are eucommia ulmoides leaves and eucommia ulmoides seed meal which are subjected to fermentation treatment.

Preferably, the feed additive comprises the following raw materials in parts by weight: 40-60 parts of eucommia leaves, 5-15 parts of honeysuckle, 20-30 parts of mulberry leaves and 10-20 parts of eucommia seed meal.

More preferably, the feed additive comprises: 50 parts of eucommia leaves, 10 parts of honeysuckle, 25 parts of mulberry leaves and 15 parts of eucommia seed meal.

The preparation method of the feed additive prepared by taking the eucommia ulmoides as the raw material comprises the following steps:

s1: taking folium cortex eucommiae, honeysuckle, folium mori and eucommia seed meal, and drying until the water content is 1-5%; respectively pulverizing to 20 mesh to obtain folium Eucommiae powder, flos Lonicerae powder, folium Mori powder and Eucommiae cortex seed meal powder;

s2: uniformly mixing 40-60 parts of the eucommia leaf powder, 5-15 parts of honeysuckle powder, 20-30 parts of mulberry leaf powder and 10-20 parts of eucommia seed meal powder which are crushed in the step (1) to obtain mixed powder;

s3: taking the mixed powder in the S2, adding water to ensure that the water content is 30-60%, adding a compound bacterial liquid accounting for 3-5% of the mass of the mixed material, and fermenting at 30-38 ℃ for 24-48 h; and (5) obtaining the feed additive after the fermentation is finished.

As an improvement, in the invention, the feed additive in S3 is dried until the water content is 2-3%; or granulating the feed additive in S3 to obtain granular feed additive. The operation is carried out in such a way that the shelf life of the feed additive is prolonged.

The compound bacterial liquid preferably comprises lactic acid bacterial liquid, lactobacillus acidophilus bacterial liquid and lactobacillus raman bacterial liquid; the volume ratio of the lactobacillus liquid to the lactobacillus acidophilus liquid to the lactobacillus raman liquid is 3-8: 2-5: 1-3; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-9X 10 Lactobacillus acidophilus liquid⁹cfu/mL, and the viable bacteria content in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL。

In a preferred aspect of the present invention, the method for preparing a feed additive from eucommia ulmoides oliv is characterized in that,

s2: uniformly mixing 50 parts of the eucommia ulmoides leaf powder, 10 parts of honeysuckle powder, 25 parts of mulberry leaf powder and 15 parts of eucommia ulmoides seed meal powder which are crushed in the step (1) to obtain mixed powder;

s3: taking the mixed powder in the S2, adding water to enable the water content to be 40%, then adding compound bacterial liquid accounting for 4% of the mixed material by mass, and fermenting for 36 hours at 37 ℃; and (5) obtaining the feed additive after the fermentation is finished.

The eucommia ulmoides leaves and the eucommia ulmoides seed meal are used as main raw materials, because the eucommia ulmoides leaves and the eucommia ulmoides seed meal have the effects of clearing in-vivo garbage, enhancing the metabolism of human cell substances, promoting urination and clearing heat, resisting bacteria in a broad spectrum, exciting central nerves and improving the pharmacological action of white blood cells, and the eucommia ulmoides leaves have wide sources, low cost and easy obtainment; the eucommia seed meal is waste generated in the processing process of the eucommia gum and the eucommia fine powder or the eucommia seed oil, and the waste is used as a raw material, so that waste is changed into valuable, the waste is reasonably and properly treated and utilized, and the additional value of the waste is improved.

In the aspect of microbial strain selection, the inventor tries various strains, a large amount of creative labor is paid, through continuous experiments, the composite strain suitable for fermentation is obtained by separately and purely culturing numerous strains and then accurately mixing the strains according to a certain proportion, and the selected strain combination is more suitable for fermentation of eucommia ulmoides.

In the fermentation process, the fermentation mode is adopted, so that various raw materials can perform synergistic action, the release of active ingredients in the eucommia ulmoides is promoted, and the active ingredients in the eucommia ulmoides are fully utilized.

The invention has the beneficial effects that:

(1) according to the invention, through a fermentation process, the raw materials taking the eucommia ulmoides leaves as the main materials are fermented, and compared with the feed additive which is obtained by directly crushing the eucommia ulmoides leaves, the feed greatly increases the digestibility, improves the absorption amount of nutrient components, avoids the waste caused by incapability of digesting and absorbing the eucommia ulmoides leaves, and can more comprehensively absorb and utilize the active components in the eucommia ulmoides leaves;

(2) the improved feed improves the taste and increases the appetite of the poultry, thereby further improving the laying rate and increasing the breeding income;

(3) the raw materials are treated by the process, so that the active ingredients of the eucommia ulmoides are reserved, and the active ingredients contained in the eucommia ulmoides are combined and synergized with other raw materials, so that the eucommia ulmoides can better release the active ingredients, the bacteriostatic or bactericidal capacity is improved, the autoimmunity of animals can be improved, and the nonreactive effect can be achieved;

(4) the raw materials of the feed additive provided by the invention are all from natural plants, and do not contain artificial chemical antibiotics or hormones, so that the feed additive has profound significance for further ensuring the food safety;

(5) the raw materials adopted by the invention are relatively simple, mainly comprise four components which are easily obtained, wherein the sources of eucommia leaves are wide and the price is low, the eucommia seed meal is waste in eucommia processing, and the sources of mulberry leaves are wide and easy to obtain and the cost is low; the practicability is strong, the manufacturing process is simple, and the large-scale production and application are convenient.

Drawings

FIG. 1 is a picture of a feed additive in example 1 of the present invention;

FIG. 2 is a picture of a feed additive in example 2 of the present invention;

FIG. 3 is a photograph of a laying hen reared with the feed additive of the present invention.

Detailed Description

The present invention will be further described with reference to specific examples so that those skilled in the art may better understand the present invention, but the present invention is not limited thereto.

Example 1

A preparation method of a feed additive prepared by taking eucommia ulmoides as a raw material is characterized in that,

the compound bacterial liquid comprises lactic acid bacterial liquid, acidophilic lactobacillus bacterial liquid and raman lactobacillus bacterial liquid; the volume ratio of the lactobacillus liquid to the lactobacillus acidophilus liquid to the lactobacillus raman liquid is 6: 3: 2; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-9X 10 Lactobacillus acidophilus liquid⁹cfu/mL, and the viable bacteria content in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL；

The obtained feed additive is sour as shown in figure 1, is brown in color and is relatively loose, and the feed additive produced by the inventor is used up within 2 days generally without drying and granulating. If long-term storage is required, drying and granulation treatment are generally carried out, so that the storage is convenient and the storage is long-term.

Example 2

s2: uniformly mixing 40 parts of the eucommia ulmoides leaf powder, 5 parts of honeysuckle powder, 20 parts of mulberry leaf powder and 10 parts of eucommia ulmoides seed meal powder which are crushed in the step (1) to obtain mixed powder;

the compound bacterial liquid comprises lactic acid bacterial liquid, acidophilic lactobacillus bacterial liquid and raman lactobacillus bacterial liquid; the volume ratio of the lactobacillus liquid to the lactobacillus acidophilus liquid to the lactobacillus raman liquid is 5: 3: 2; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-9X 10 Lactobacillus acidophilus liquid⁹cfu/mL, and the viable bacteria content in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL；

S3: taking the mixed powder in the S2, adding water to enable the water content to be about 30%, then adding compound bacterial liquid accounting for 4% of the mixed material by mass, and fermenting for 30 hours at 37 ℃; and (5) obtaining the feed additive after the fermentation is finished.

Example 3

s2: uniformly mixing 60 parts of the eucommia ulmoides leaf powder, 15 parts of honeysuckle powder, 30 parts of mulberry leaf powder and 20 parts of eucommia ulmoides seed meal powder which are crushed in the step (1) to obtain mixed powder;

the compound bacterial liquid comprises lactic acid bacterial liquid, lactobacillus acidophilus bacterial liquid and lactobacillus raman bacterial liquid; the volume ratio of the lactobacillus liquid to the lactobacillus acidophilus liquid to the lactobacillus raman liquid is 6: 2: 2; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-9X 10 Lactobacillus acidophilus liquid⁹cfu/mL, and the viable bacteria content in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL；

When the scheme of the invention is obtained, the inventor carries out a large number of experiments, and finds that the effect of some strains and the feed additive prepared by part of the formula is not good, and the method specifically comprises the following steps:

comparative example 1

In comparative example 1, eucommia seed meal is not adopted, and eucommia leaf powder is used for replacing eucommia seed meal powder;

in S2: the difference from the embodiment 1 is that 65 parts of the eucommia ulmoides leaf powder, 10 parts of the honeysuckle powder and 25 parts of the mulberry leaf powder which are crushed in the step (1) are uniformly mixed to obtain mixed powder; the remaining procedure was as in example 1.

Comparative example 2

In comparative example 1, folium Eucommiae was not used, and folium Eucommiae powder was replaced with semen Eucommiae powder;

s2: uniformly mixing 10 parts of the honeysuckle powder, 25 parts of mulberry leaf powder and 65 parts of eucommia seed meal powder which are crushed in the step (1) to obtain mixed powder; the remaining procedure was as in example 1.

Comparative example 3

In comparative example 1, honeysuckle powder is not adopted, and eucommia leaf powder and eucommia seed meal powder are supplemented to the weight parts of the honeysuckle powder in example 1;

s2: and (2) uniformly mixing 55 parts of the eucommia leaf powder, 25 parts of the mulberry leaf powder and 20 parts of eucommia seed meal powder which are crushed in the step (1) to obtain mixed powder. The remaining procedure was as in example 1.

Comparative example 4

In comparative example 1, no mulberry leaf powder was used, and the eucommia leaf powder and eucommia seed meal powder were supplemented to the weight parts of the mulberry leaf powder in example 1;

s2: and (2) uniformly mixing 65 parts of the eucommia leaf powder, 10 parts of honeysuckle powder and 25 parts of eucommia seed meal powder which are crushed in the step (1) to obtain mixed powder. The remaining procedure was as in example 1.

Comparative example 5

Compared with example 1, the dosage of the eucommia ulmoides leaf powder and the eucommia ulmoides seed meal is changed in comparative example 5, and the specific dosage is as follows:

s2: taking 15 parts of the eucommia leaf powder, 10 parts of honeysuckle powder, 25 parts of mulberry leaf powder and 50 parts of eucommia seed meal which are crushed in the step (1), and uniformly mixing to obtain mixed powder; the remaining procedure was as in example 1.

Comparative example 6

Compared with the example 1, in the same manner, in the comparative example 6, the usage of the eucommia ulmoides leaf powder and the eucommia ulmoides seed meal is changed, the usage of the eucommia ulmoides leaf powder is reduced, the usage of the eucommia ulmoides seed meal powder is also reduced, and the usage of the honeysuckle powder and the mulberry leaf powder is increased, specifically as follows:

s2: uniformly mixing 20 parts of the eucommia ulmoides leaf powder, 20 parts of honeysuckle powder, 50 parts of mulberry leaf powder and 5 parts of eucommia ulmoides seed meal powder which are crushed in the step (1) to obtain mixed powder; the remaining procedure was as in example 1.

Comparative example 7

Compared with example 1, the composite bacterial liquid used in comparative example 7 is lactic acid bacterial liquid and acidophilic lactobacillus bacterial liquid; lactic acid bacteria liquid and acidophilic acidThe volume ratio of the lactobacillus liquid is 3: 1; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-x 10 of acidophilic lactobacillus liquid⁹cfu/mL. The remaining procedure was as in example 1.

Comparative example 8

Compared with the embodiment 1, the comparative example 8 adopts a single bacterium solution, only adopts lactic acid bacterium solution, and the consumption of the lactic acid bacterium solution is 4% of the mass of the mixed material; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL; the remaining procedure was as in example 1.

Comparative example 9

Compared with the example 1, the consumption of the lactobacillus raman bacterial liquid adopted in the comparative example 9 is 4% of the mass of the mixed material; the content of viable bacteria in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL; the remaining procedure was as in example 1.

Comparative example 10

Compared with the example 1, the lactobacillus acidophilus liquid adopted in the comparative example 9 accounts for 4 percent of the mass of the mixed material; the content of viable bacteria in the lactobacillus acidophilus liquid is 2-9 multiplied by 10⁹cfu/mL. The remaining procedure was as in example 1.

Example 5

Regarding the feed, the inventor selects a farm of the unit of the application, randomly divides healthy Hailan brown commercial laying hens of 52 weeks old into 14 groups, each group comprises 30 chickens, each group comprises 5 chickens, and the group is fed with basic ration in a comparison group;

preparing daily ration: a laying hen corn-soybean meal type test feed is designed according to the nutritional requirements of laying hens in NRC (poultry nutritional requirements) (1994) and Chinese (chicken feeding standards) (2004).

Adding the feed additives in the groups of examples 1, 2 and 3 into basic ration, uniformly mixing, wherein the adding amount of the feed additives is 5% of the weight of the basic ration, and feeding the ration added with the feed additives in the groups of examples 1-3 respectively;

adding the feed additives in the groups of comparative examples 1-10 into basic ration, and uniformly mixing, wherein the addition amount of the feed additives is 5% of the weight of the basic ration, and the groups of comparative examples 1-10 are respectively fed with the ration added with the feed additives;

the raising period is 15 days, the production performance index of the laying hens is recorded within 15 days, the total egg production number, the total egg weight and the feed intake are recorded every day during the test period, and the average egg weight, the daily egg production amount, the egg laying rate, the daily feed intake and the feed-egg ratio are counted by taking a group as a unit.

In the experimental process, laying hens are raised in cages according to an upper layer and a lower layer (as shown in an attached figure 3), the laying hens are fed with water freely, natural illumination and artificial illumination are combined, the condition that the illumination is about 16 hours every day is guaranteed, natural ventilation and transverse negative pressure ventilation are combined, chicken manure is cleaned 2 times every day, eggs are picked 2 times every day, and the chickens are immunized and the cages are disinfected according to a conventional procedure.

Table 1 table for comparing the productivity of laying hens in example group and comparative example group

Note: no significant difference in data among groups (P > 0.05)

From the data in the above table it can be seen that:

(1) the formula of the raw materials is that the proportion of the eucommia leaves or the eucommia seed meal is changed, or only the eucommia leaves or the eucommia seed meal are adopted, so that the laying rate of laying hens is reduced, the eucommia leaves and the eucommia seed meal can obviously improve the laying rate of the laying hens within a certain proportion range, and for analysis reasons, the eucommia leaves and the eucommia seed meal contain partially same components, but are different in specific component content, and contain different components, for example, the eucommia leaves contain VB1, VE, β -carotene, 17 free amino acids, 15 trace elements such as germanium, selenium and the like, the content of crude protein in the eucommia leaves is higher than that of corns, broomcorn and potatoes and is equivalent to that of barley, wheat and the like, and the eucommia leaves also contain linoleic acid with the mass fraction of 1.59% and linolenic acid with the mass fraction of 45.85%.

The eucommia seed oil meal nutrient component research article discloses: the contents of protein, sugar and fat in the eucommia seed oil meal are 337.50g/kg, 140.00g/kg and 16.50g/kg respectively; the contents of potassium, sodium, calcium and iron are respectively 11.2g/kg, 0.014g/kg, 4.2g/kg and 0.38g/kg, and the high-protein low-fat high-potassium low-sodium food has remarkable characteristics of high protein and low fat and high potassium and low sodium. Vitamin B in eucommia seed oil meal₁And B₂The contents were 6.30mg/kg and 3.18mg/kg, respectively. The eucommia seed oil meal contains 17 amino acids, the total content is 214.9g/kg, and the content of essential amino acids is 66.0 g/kg. The contents of aucubin, total flavone and chlorogenic acid are 137.6g/kg, 0.61g/kg and 1.00g/kg respectively.

From the above analysis, the eucommia ulmoides leaves and the eucommia ulmoides seed meal have different components, so that the eucommia ulmoides leaves and the eucommia ulmoides seed meal have different functions in the feed additive in improving the laying rate of the laying hens. When the two are in a certain range, the two can act synergistically to improve the laying rate together.

Meanwhile, the inventor removes honeysuckle powder or mulberry leaf powder, which also causes the reduction of the laying rate; this shows that honeysuckle and mulberry leaf also have a certain positive effect on the aspect of improving the laying rate of the laying hens. The honeysuckle has the functions of clearing away heat and toxic materials, soothing throat, relieving summer heat and relieving restlessness, and generally has the functions of enhancing the immunity and disease resistance of organisms and reducing the morbidity in the feed; folium Mori has effects of dispelling pathogenic wind and heat, clearing lung-heat, moistening dryness, removing liver fire, and improving eyesight; however, after the honeysuckle and the mulberry leaves are matched with the eucommia ulmoides leaves and the eucommia ulmoides seed meal, the laying rate of the laying hens can be improved together, which is an unexpected result, and the analysis reason is that the honeysuckle and the mulberry leaves also have the function of assisting in improving the body resistance of the laying hens, so that the honeysuckle and the mulberry leaves have good anti-inflammatory effect on the oviduct of the laying hens, the oviduct of the laying hens needs to be in a healthy state, the oviduct not only produces proteins and eggshells, but also is responsible for the task of conveying eggs to the outside, and if inflammation or other unhealthy states occur, the channels for laying eggs and conveying the eggs can be paralyzed, so that the laying rate is influenced. Meanwhile, the honeysuckle and the mulberry leaves are easy to digest by analyzing the components, so that the laying hens can utilize the nutrition and active ingredients in the honeysuckle and the mulberry leaves, and the honeysuckle and the mulberry leaves have a positive effect on improving the laying rate.

(2) From the comparison results of comparative examples 7-10, the laying rate is also reduced, mainly because the fermentation strains are changed, and therefore, the laying rate of the laying hens fed with the obtained feed additive is highest by adopting the composite bacterial liquid for fermentation;

in conclusion, the raw materials have a certain synergistic effect, and the laying hens are promoted to improve the laying rate.

Regarding the digestibility of the feed additive of the present invention, digestion tests were conducted on the example group, the comparative example group and the control example group at the end of the feeding test. Taking chickens of different weeks as experimental objects, and dividing the chickens into 15-17 weeks, 20-22 weeks and 32-34 weeks; the digestibility of the three chickens of different ages in each week on the basal diet, the diet group added with the feed additive in the example and the diet group added with the feed additive in the comparative example is measured.

18 in the afternoon each day: collecting feces about 00 times for 5 days continuously, storing the feces at-20 deg.C, mixing feces samples of each repeating group collected for 5 days in equal proportion, and respectively preparing control group, example 1 group, example 2 group, example 3 group, comparative example 1 group, comparative example 2 group, comparative example 3 group, comparative example 4 group, comparative example 5 group, comparative example 6 group, comparative example 7 group, comparative example 8 group, comparative example 9 group and comparative example 10 group; placing the sample in a porcelain plate, drying the sample in an oven for 48 hours at 70 ℃, cooling, weighing after cooling to normal temperature, continuously drying for 2-3 hours until the weight is constant, crushing the sample by a crusher after drying the mouth of the chicken manure sample, sieving the crushed sample by a 40-mesh sieve, fully and uniformly mixing the crushed sample, placing the crushed sample in a bottle with a frosted mouth, attaching a label to the bottle for measuring the digestibility and the daily ration metabolism in nutrients, and measuring by adopting an endogenous indicator method (2N-HCl insoluble ash method), wherein the nutrient digestibility has the following calculation formula:

nutrient digestibility%

a: the percentage content of certain nutrients in the chicken manure;

b: the percentage content of the indicator in the feed;

c: the percentage content of certain nutrient in the feed;

d: the percentage content of the indicator in the chicken manure.

Taking the digestibility of fat as an example, the results detected by the invention are as follows:

table 2 fat digestibility comparison table of laying hens of example group and comparative example group

As can be seen from the data in the table 2, in the feed additives of the present invention, in the groups of examples 1 to 3, the digestibility of the laying hens aged 15 to 17 weeks, 20 to 22 weeks or 32 to 34 weeks is high for fat, and can reach about 98% at most, and thus, the feed additives of the present invention greatly increase the digestibility of the laying hens.

Claims

1. A laying hen feed additive prepared by taking eucommia ulmoides as a raw material is characterized in that the eucommia ulmoides are eucommia ulmoides leaves and eucommia ulmoides seed meal.

2. The laying hen feed additive prepared by taking eucommia ulmoides as a raw material according to claim 1, wherein the weight ratio of the eucommia ulmoides leaves to the eucommia ulmoides seed meal is 4-6: 1 to 2.

3. The layer chicken feed additive prepared by taking eucommia ulmoides as a raw material according to claim 1, wherein the weight ratio of the eucommia ulmoides leaves to the eucommia ulmoides seed meal to the feed additive is as follows: 5-8: 7.5 to 12.5.

4. The layer chicken feed additive prepared by taking eucommia as a raw material according to claim 1, wherein the eucommia leaves and the eucommia seed meal are eucommia leaves and eucommia seed meal which are subjected to fermentation treatment.

5. The layer feed additive prepared from eucommia ulmoides as raw materials according to claim 1, wherein the layer feed additive comprises the following raw materials in parts by weight: 40-60 parts of eucommia leaves, 5-15 parts of honeysuckle, 20-30 parts of mulberry leaves and 10-20 parts of eucommia seed meal.

6. The feed additive prepared from eucommia ulmoides as claimed in claim 1, wherein the feed additive comprises: 50 parts of eucommia leaves, 10 parts of honeysuckle, 25 parts of mulberry leaves and 15 parts of eucommia seed meal.

7. The method for preparing the feed additive prepared from eucommia ulmoides as claimed in claim 1, comprising the steps of:

8. The method for preparing a feed additive prepared from eucommia ulmoides as claimed in claim 7, wherein the feed additive in S3 is dried until the water content is 2-3%; or granulating the feed additive in S3 to obtain granular feed additive.

9. The method of claim 7, wherein the compound bacterial liquid comprises lactobacillus liquid, lactobacillus acidophilus liquid, or lactobacillus raman liquid; the volume ratio of lactobacillus liquid, lactobacillus acidophilus liquid and lactobacillus raman liquid is3-8: 2-5: 1-3; the content of viable bacteria in the lactobacillus liquid is 1-9 multiplied by 10⁹cfu/mL, 2-9X 10 Lactobacillus acidophilus liquid⁹cfu/mL, and the viable bacteria content in the Raman lactobacillus bacterial liquid is 1-9 multiplied by 10⁸cfu/mL。

10. The method for preparing a feed additive prepared from eucommia ulmoides as a raw material according to any one of claims 7 to 9,