CN113080328A

CN113080328A - Feed pre-digestion method, artificial pigeon milk and preparation method thereof

Info

Publication number: CN113080328A
Application number: CN202110432299.8A
Authority: CN
Inventors: 柒启恩; 罗梅英; 凌铭旺; 吴钰芊; 郑将鸿; 陈诒全; 何昱初; 杨承忠; 张辉华; 冯鑫
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-09

Abstract

The invention discloses a feed predigestion method, artificial pigeon milk and a preparation method thereof, wherein the preparation method of the feed predigestion method comprises the steps of selecting feed raw materials, washing, sterilizing and rinsing the feed raw materials in sequence, and then soaking the feed raw materials in water; and (4) crushing the soaked material after steam explosion to obtain the predigested feed. The raw materials of the artificial pigeon milk comprise the predigested feed prepared by the feed predigesting method. The preparation method of the artificial pigeon milk comprises the steps of uniformly mixing the raw materials of the artificial pigeon milk, homogenizing and emulsifying, and sterilizing. The predigested feed prepared by the feed predigesting method has high content of small molecular peptides and amino acids, and has good predigestion effect. And the time required by predigestion is short, the production efficiency is far higher than that of the processes such as fermentation, enzyme digestion and the like, the energy consumption is lower, and the method is more environment-friendly. In addition, the artificial pigeon milk prepared by the feed pre-digestion method has the advantages of simple production process, simple operation and easy realization.

Description

Feed pre-digestion method, artificial pigeon milk and preparation method thereof

Technical Field

The invention relates to the technical field of special feed for young animals, in particular to a feed predigestion method, artificial pigeon milk and a preparation method thereof.

Background

The young pigeons are late-grown birds which cannot forage for food independently after birth, and the parent pigeons start to vomit into pigeon milk for mouth-to-mouth feeding only after the young pigeons start to raise their heads about 4 hours after the young pigeons leave the shells. The digestive system function of young pigeons after shelling is not completely developed. The young pigeons of 0-10 days old are kept growing by the full pulp pigeon milk secreted by the parent pigeons. Pigeon milk is secreted by the crop gland of parent pigeon, is rich in protein and fat, is predigested by parent pigeon, and has the function of rapidly promoting the growth and development of young pigeon. The pigeon milk is rich in nutritional ingredients such as protein, fat, carbohydrate, mineral substances and the like, and the content of each ingredient is 9-11% of protein, 9-13% of fat, 0.8-1.1% of mineral substances and 0-6.4% of carbohydrate.

Natural pigeon milk is mainly formed by the final shedding of vegetative layers by specialized epithelial cells on the inner surface of the parent pigeon crop. The pigeon milk secretion of the parent pigeons gradually changes along with the growth and development of the young pigeons. The parent pigeons begin to secrete pigeon milk 14 days after the beginning of hatching until the young pigeons grow and develop to 25 days. The young pigeons are fed with full-thick-pulp pigeon milk within 1-4 days after being out of shells, and the thick-pulp pigeon milk is fed within 5-9 days. After 9 days the feeding of the mixture of semi-digested food and digestive juices infiltrated with the crop began. After 25 days, the feeding of the parent pigeons is reduced, and the young pigeons are induced to eat by themselves.

The physiological development characteristics of young pigeons are different from those of other poultry, so that the young pigeons are restricted in marketing rate, and conditions are created for vertical spread of diseases. The development of artificial pigeon milk and the development of artificial feeding technology are one of the advanced technical means for improving the production efficiency of young pigeons.

At present, the artificial pigeon milk at home and abroad is mainly developed by simulating the nutrient components of natural pigeon milk and preparing the artificial pigeon milk. Because the early development of the young pigeon is not complete and the performances such as digestive immunity and the like are not complete, the colostrum of the parent pigeon contains a large amount of protein, fat and sugar, and also contains certain nutritional ingredients such as immunoglobulin, and the like, and the existing artificial pigeon milk cannot reach the performance index of the colostrum of the parent pigeon.

Most artificial pigeon milk on the market is prepared by adopting a biological fermentation method at present, but the application of the microbial fermentation feed still has certain defects: such as low time consumption and long effect (30-60 hours are different); the microbial metabolites are complex and may produce some harmful metabolites; fermentation is actually a metabolic process of microorganisms, and can cause loss of nutrients in the feed and the like.

Disclosure of Invention

The invention provides a feed pre-digestion method, artificial pigeon milk and a preparation method thereof, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.

In order to overcome the technical problems, the technical scheme adopted by the invention is as follows:

a feed pre-digestion method comprises the following process steps:

s1, selecting feed raw materials, and sequentially washing, sterilizing and rinsing to prepare a standby material;

s2, soaking the standby material in water to obtain a soaked material;

s3, performing steam explosion on the soaked material to obtain a pretreatment material;

and S4, crushing the pretreatment material to obtain the predigested feed.

Specifically, firstly, raw materials of the feed are screened, the raw materials with good appearance and full seeds are selected, and the cleanliness of the raw materials is ensured from the source through washing, sterilization and rinsing.

Secondly, soaking the screened raw materials, wherein the purpose is to enable carbohydrates and proteins to generate hydration, nonpolar residual groups in the carbohydrates and the protein molecules are mutually combined with water molecules and dispersed in water to form sol, and the method is favorable for cracking the carbohydrates and the protein molecules.

And thirdly, performing steam explosion on the soaked material, and exploding the raw material under the steam pressure and the temperature to degrade more than 70% of protein in the feed raw material into peptide and amino acid with the KDa content of less than 10KDa, so that the feed raw material has natural flavor and taste and achieves the effect of predigestion. Meanwhile, the steam explosion process needs to be carried out in a water environment, and hydrolysis and hydration are carried out in the water environment while molecular chains of carbohydrates and proteins are broken in the steam explosion process, so that micromolecular substances are favorably formed.

Finally, the pre-treated material after steam explosion is crushed to obtain stable and uniform pre-digested feed, thereby further promoting the pre-digestion.

As a further improvement of the above scheme, in step S1, the rinsing is performed by using drinking water for a plurality of times; the sterilization is carried out by soaking in 1-2% sodium hypochlorite solution for 10-20 minutes; the rinsing is carried out for multiple times by using drinking water. Specifically, the cleanliness of the raw materials can be ensured by adopting drinking water with drinking standard for multiple times of washing; the raw materials can be effectively sterilized by soaking the raw materials in the hypochlorous acid solution, so that the infection of animals in the later period is prevented; the multiple rinsing after sterilization is mainly used for removing the hypochlorous acid solution.

As a further improvement of the scheme, the soaking in the step S2 is carried out by soaking in water with the temperature of 10-25 ℃ for 6-12 hours. In particular, soaking for a certain time at a certain temperature is beneficial to the full cracking of carbohydrate and protein molecules.

As a further improvement of the scheme, the weight ratio of the spare materials to the water in the step S2 is 1 (2-10), so that the raw materials are completely below the water surface.

As a further improvement of the above scheme, the process parameters of the steam explosion in step S3 are as follows: the vapor pressure is 0.5-5MPa, the temperature is 100-.

The invention also provides a technical scheme that the artificial pigeon milk comprises a predigested feed which is prepared by adopting the feed predigesting method.

Specifically, the predigested feed is added into the artificial pigeon milk, so that the digestion problem caused by the incomplete digestion function of the young pigeons can be obviously improved, and meanwhile, the predigested feed contains a large amount of small molecular peptides and amino acids, has natural flavor and taste and is beneficial to the independent feeding of the young pigeons.

As a further improvement of the above scheme, the raw materials further comprise at least one of grease, dairy products, organic acids, oligosaccharides, amino acids, emulsifiers, vitamins, and minerals.

Furthermore, the oil is at least one of soybean oil, coconut oil and fish oil, the dairy product is milk powder, whey powder and the like, and the oil and the dairy product can provide sufficient nutrition for the young pigeons.

Furthermore, the organic acid is at least one of citric acid, lactic acid, benzoic acid and potassium sorbate, and the organic acid can reduce the pH value of the artificial pigeon milk, inhibit the growth of microorganisms and provide a long shelf life for the artificial pigeon milk.

Furthermore, the oligosaccharide is at least one of fructo-oligosaccharide, galacto-oligosaccharide and chitosan oligosaccharide, and is beneficial to improving the immunity of young pigeons and promoting the colonization of intestinal probiotics.

Further, the amino acid is methionine or lysine.

Further, the emulsifier is at least one of lecithin, monoglyceride and xanthan gum.

Further, the vitamin is at least one of vitamin A, vitamin D, vitamin E, vitamin B2, vitamin B6, vitamin B12, nicotinic acid, folic acid, calcium pantothenate and biotin.

Further, the mineral substance is a mineral substance containing at least one element of copper, iron, zinc and manganese.

Specifically, the copper is selected from at least one of amino acid chelated copper, chitosan copper, yeast copper, copper sulfate and basic copper chloride; the iron is at least one selected from ferrous lactate, ferrous fumarate, methionine iron, glycine iron and porphyrin iron; the zinc is at least one selected from zinc methionine, zinc lysine, zinc glycinate, zinc gluconate, zinc citrate, zinc lactate and zinc propionate; the manganese is selected from at least one of manganese acetate, manganese glycinate, manganese hydroxymethionine chelate, manganese methionine chelate and manganese complex amino acid.

As a further improvement of the above scheme, the composition of the raw materials comprises by weight: 25-60 parts of predigested feed, 10-25 parts of grease, 1-10 parts of dairy product, 0.1-2 parts of organic acid, 0.01-0.5 part of oligosaccharide, 0.50-3.5 parts of amino acid, 0.1-2 parts of emulsifier, 0.01-0.5 part of vitamin and 0.01-0.5 part of mineral substance, wherein based on the mass of the predigested feed, the predigested feed comprises the following components in parts by weight: 10-20 parts of pea, 10-20 parts of soybean, 5-20 parts of corn and 0.01-0.05 part of traditional Chinese medicine.

Further, the Chinese medicinal materials include at least two of radix astragali, radix Codonopsis, Coptidis rhizoma, Glycyrrhrizae radix, cortex Phellodendri, rhizoma anemarrhenae, Scutellariae radix, indigo naturalis, cortex Cinnamomi, Borneolum Syntheticum, radix et rhizoma Rhei, Galla chinensis, herba Houttuyniae, and flos Lonicerae. Specifically, the Chinese herbal medicines are used for replacing antibiotics, enhancing the immune function of animal organisms, promoting metabolism, improving the production performance of the young pigeons, and more importantly, avoiding the residue problem and the downstream food safety problem caused by the use of the antibiotics.

The invention also provides a technical scheme that the preparation method of the artificial pigeon milk comprises the following steps:

1) uniformly mixing the raw materials of the artificial pigeon milk, wherein the CV is less than or equal to 10 percent;

2) homogenizing and emulsifying the uniformly mixed raw materials, and sterilizing.

Further, the homogenizing and emulsifying treatment is carried out by adopting a high-pressure homogenizing and emulsifying machine, wherein: the pressure is 30-120MPa, and the pH value of the treated material is 4.5-5.0.

Further, the sterilization is carried out by pasteurization.

Further, the sterilized artificial pigeon milk can be subjected to vacuum packaging under an aseptic condition, so that the artificial pigeon milk which can be stably transported, stored and used is obtained.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

the feed pre-digestion method of the invention firstly carries out soaking treatment after cleaning, sterilization and rinsing, and then carries out steam explosion and crushing, and the synergistic effect of all the process steps ensures that the prepared pre-digestion feed has high content of small molecular peptides and amino acids and good pre-digestion effect. Meanwhile, the time required by predigestion is short, the production efficiency is far higher than that of processes such as fermentation and enzyme digestion, the energy consumption is lower, and the method is more environment-friendly. In addition, the artificial pigeon milk prepared by the feed pre-digestion method has a simple production process, mainly comprises the processes of mixing ingredients, pressure homogenization, sterilization and the like, and is simple in process, simple to operate and easy to realize.

Drawings

FIG. 1 molecular weight distribution of predigested feed proteins for comparative and example.

Detailed Description

The present invention is described in detail below by way of examples to facilitate understanding of the present invention by those skilled in the art, and it is to be specifically noted that the examples are provided only for the purpose of further illustrating the present invention and are not to be construed as limiting the scope of the present invention.

Example 1

The feed predigestion method of the embodiment comprises the following process steps:

s1, selecting feed raw materials, wherein the raw materials are composed of the components shown in Table 1, washing the raw materials with drinking water for three times, then soaking the raw materials in 1% sodium hypochlorite solution for 10 minutes for sterilization treatment, and then rinsing the raw materials with the drinking water for three times to obtain standby materials;

s2, soaking the standby material processed in the step S1 in water at 10 ℃ for 6 hours, wherein the ratio of the raw materials to the water is 1:2, and obtaining a soaked material;

s3, adding the soaking material obtained in the step S2 and soaking water into a steam explosion device, sealing the device, allowing the pressure in the device to reach 0.5MPa and the temperature to reach 100 ℃ through saturated steam, maintaining the pressure for 60 seconds, and then instantaneously performing pressure relief explosion for 0.1 second to obtain a pretreatment material;

and S4, performing wet grinding on the pretreated material obtained in the step S3 by using a colloid mill, so that the material completely passes through a 80-mesh screen to obtain stable and uniform pre-digested feed.

The composition of the raw materials of the artificial pigeon milk of this example is shown in table 2.

The preparation method of the artificial pigeon milk of the embodiment comprises the following steps:

1) weighing the raw materials according to the raw material composition of the artificial pigeon milk in the embodiment, and uniformly mixing the raw materials, wherein CV (uniformity of mixing) is less than or equal to 10%;

2) and further emulsifying the uniformly mixed raw materials by using a high-pressure homogenizer to obtain a uniformly and stably mixed artificial pigeon milk semi-finished product, wherein the pressure of the high-pressure homogenizer is adjusted to be 30Mpa, and the pH value of the raw materials after high-pressure homogenization is 4.5. And then sterilizing the semi-finished product of the artificial pigeon breast by adopting a pasteurization method. And finally, carrying out vacuum packaging under the aseptic condition to obtain the artificial pigeon milk.

Comparative example 1

The process steps of the feed predigestion method of the comparative example are as follows:

s1, selecting feed raw materials, wherein the raw materials are composed of the components shown in Table 1, washing the raw materials with drinking water for three times, then soaking the raw materials in 1.5% sodium hypochlorite solution for 20 minutes for sterilization treatment, and then rinsing the raw materials with the drinking water for three times to obtain standby materials;

s2, soaking the standby material processed in the step S1 in water at 25 ℃ for 10 hours, wherein the ratio of the raw materials to the water is 1:8, and obtaining a soaked material;

and S3, performing wet grinding on the soaked material obtained in the step S2 by using a colloid mill, so that the material completely passes through a 80-mesh screen to obtain stable and uniform pre-digested feed.

The composition of the raw materials of the artificial pigeon milk of this comparative example is shown in table 2.

The preparation method of the artificial pigeon milk of the comparative example is the same as that of example 1.

Comparative example 2

s1, selecting feed raw materials, wherein the raw materials are shown in Table 1 in composition, washing the raw materials with drinking water for three times, then soaking the raw materials in 1.5% sodium hypochlorite solution for 20 minutes for sterilization treatment, then rinsing the raw materials with the drinking water for three times, and draining the surface moisture of the raw materials to obtain a standby material;

s2, adding the spare material processed in the step S1 into a steam explosion device, sealing the device, keeping the device at a temperature of 160 ℃ for 240 seconds without introducing supersaturated steam, and then instantaneously performing pressure relief explosion for 0.1 second to obtain a pretreated material;

and S3, performing wet grinding on the pretreated material obtained in the step S2 by using a colloid mill, so that the material completely passes through a 80-mesh screen to obtain stable and uniform pre-digested feed.

Example 2

s1, selecting feed raw materials, wherein the raw materials are composed of the components shown in Table 1, washing the raw materials with drinking water for three times, then soaking the raw materials in 1.5% sodium hypochlorite solution for 15 minutes for sterilization treatment, and then rinsing the raw materials with the drinking water for three times to obtain standby materials;

s2, soaking the standby material processed in the step S1 in water at 15 ℃ for 8 hours, wherein the ratio of the raw materials to the water is 1:4, and obtaining a soaked material;

s3, adding the soaking material obtained in the step S2 and soaking water into a steam explosion device, sealing the device, allowing the pressure in the device to reach 1.5MPa and the temperature to reach 120 ℃ through saturated steam, maintaining the pressure for 120 seconds, and then instantaneously releasing pressure and exploding for 0.1 second to obtain a pretreatment material;

2) and further emulsifying the uniformly mixed raw materials by using a high-pressure homogenizer to obtain a uniformly and stably mixed artificial pigeon milk semi-finished product, wherein the pressure of the high-pressure homogenizer is adjusted to be 60Mpa, and the pH value of the raw materials after high-pressure homogenization is 4.5. And then sterilizing the semi-finished product of the artificial pigeon breast by adopting a pasteurization method. And finally, carrying out vacuum packaging under the aseptic condition to obtain the artificial pigeon milk.

Example 3

s1, selecting feed raw materials, wherein the raw materials are composed of the components shown in Table 1, washing the raw materials with drinking water for three times, then soaking the raw materials in a 2% sodium hypochlorite solution for 15 minutes for sterilization treatment, and then rinsing the raw materials with the drinking water for three times to obtain standby materials;

s2, soaking the standby material processed in the step S1 in water at the temperature of 20 ℃ for 8 hours, wherein the ratio of the raw materials to the water is 1:6, and obtaining a soaked material;

s3, adding the soaking material obtained in the step S2 and soaking water into a steam explosion device, sealing the device, allowing the pressure in the device to reach 2.5MPa and the temperature to reach 140 ℃ through saturated steam, maintaining the pressure for 180 seconds, and then instantaneously performing pressure relief explosion for 0.1 second to obtain a pretreatment material;

2) and further emulsifying the uniformly mixed raw materials by using a high-pressure homogenizer to obtain a uniformly and stably mixed artificial pigeon milk semi-finished product, wherein the pressure of the high-pressure homogenizer is adjusted to 80Mpa, and the pH value of the raw materials after high-pressure homogenization is 5.0. And then sterilizing the semi-finished product of the artificial pigeon breast by adopting a pasteurization method. And finally, carrying out vacuum packaging under the aseptic condition to obtain the artificial pigeon milk.

Example 4

s3, adding the soaking material obtained in the step S2 and soaking water into a steam explosion device, sealing the device, allowing the pressure in the device to reach 3.5MPa and the temperature to reach 160 ℃ through saturated steam, maintaining the pressure for 240 seconds, and then instantaneously performing pressure relief explosion for 0.1 second to obtain a pretreatment material;

2) and further emulsifying the uniformly mixed raw materials by using a high-pressure homogenizer to obtain a uniformly and stably mixed artificial pigeon milk semi-finished product, wherein the pressure of the high-pressure homogenizer is adjusted to be 100Mpa, and the pH value of the raw materials after high-pressure homogenization is 5.0. And then sterilizing the semi-finished product of the artificial pigeon breast by adopting a pasteurization method. And finally, carrying out vacuum packaging under the aseptic condition to obtain the artificial pigeon milk.

TABLE 1 composition of predigested feedstuff for each example and comparative example

Raw materials (parts)	Comparative example 1	Comparative example 2	Example 1	Example 2	Example 3	Example 4
							Pea (Pisum sativum L.)	10	10	10	15	15	20
Soybean	20	20	20	15	20	10
							Corn (corn)	10	10	10	10	15	15
Astragalus membranaceus	0.01	0.01	0.01	0	0	0
							Codonopsis pilosula	0.02	0.02	0.02	0	0	0
Coptis chinensis	0	0	0	0.02	0	0
							Licorice root, radix Glycyrrhizae	0	0	0	0.02	0	0
Huang Bai	0	0	0	0	0.01	0
							Rhizoma anemarrhenae	0	0	0	0	0.03	0
Herba Houttuyniae	0	0	0	0	0	0.02
							Honeysuckle	0	0	0	0	0	0.03

Table 2 composition table of artificial pigeon milk raw material for each example and comparative example

The predigested feed protein molecular weight distributions for each example and comparative example are shown in figure 1, where: m is protein component standard (10-170 KD); 1 is the predigested feed protein molecular weight profile of comparative example 1; 2 is the predigested feed protein molecular weight profile of comparative example 2; 3 is the predigested feed protein molecular weight profile of example 1; 4 is the predigested feed protein molecular weight profile of example 2; 5 is the predigested feed protein molecular weight profile of example 3; the predigested feed protein molecular weight profile of example 4 is shown at 6. As can be seen from fig. 1: the feed of comparative example 1, which contained a large amount of macromolecular protein components because it was not predigested by steam explosion; the feed of comparative example 2, which had not been sufficiently soaked despite the steam explosion predigestion, still contained a certain amount of macromolecular protein components; the feeds of examples 1-4 were predigested by steam explosion with different process parameters, and most of the protein molecules in the feeds were degraded, and only a small amount of macromolecular protein components were observed in example 1. Therefore, the feed pre-digestion method can achieve a good pre-digestion effect.

Example 5: animal testing

70 newly born squabs were randomly selected and divided into 7 groups of 10 squabs each. The control group is fed with natural pigeon milk by a breeding pigeon, and the artificial pigeon milk corresponding to each example is fed by an air cylinder type fattening device (namely, a 50ml syringe is used for removing a needle and then a section of soft rubber tube with the length of 5-6cm is added) in the comparative example and the example. The feeding amount of each pigeon is basically the same, so that dyspepsia or crop eclipse caused by excessive feeding amount is prevented. The following indices were observed: initial body weight, body weight at 10 days of age, diarrhea rate, as detailed in table 3 below.

During the test, a specially-assigned person is arranged to be responsible for raising, so that the pigeon house can freely eat and drink water, and the pigeon house can keep proper temperature, humidity and environmental sanitation. In the test process, the young pigeons are found to be sick and treated in time, and are eliminated after failing to recover within 2 days, and the young pigeons are tested for 10 days (0-10 days old).

TABLE 3 comparison table of young pigeon growth index parameters between control group and test group

As can be seen from Table 3, the feed material used in comparative example 1 was not subjected to a preliminary digestion treatment, resulting in poor productivity and higher diarrhea and mortality rates in young pigeons. The raw material in comparative example 2 was steam exploded without being soaked, the predigestion effect was not good, and the productivity was not as good as the control.

The artificial pigeon milk of the embodiments 1-4 of the invention can achieve the feeding effect of the breeding pigeon in the aspect of production performance. Examples 2-4 are superior to the effect of pigeon feeding in average daily gain with no significant difference in diarrhea rate, mortality rate. The artificial pigeon milk provided by the embodiment of the invention can improve the growth performance of young pigeons. Can be widely applied to production practice.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. A feed pre-digestion method is characterized by comprising the following process steps:

s2, soaking the standby material in water to obtain a soaked material;

and S4, crushing the pretreatment material to obtain the predigested feed.

2. The feed pre-digestion method according to claim 1, characterized in that: in the step S1, the washing is carried out for a plurality of times by adopting drinking water;

the sterilization is carried out by soaking in 1-2% sodium hypochlorite solution for 10-20 minutes;

the rinsing is carried out for multiple times by using drinking water.

3. The feed pre-digestion method according to claim 1, characterized in that: in the step S2, the soaking is carried out by adopting water with the temperature of 10-25 ℃ for 6-12 hours.

4. The feed pre-digestion method according to claim 1, characterized in that: in the step S2, the weight ratio of the spare material to the water is 1 (2-10).

5. The feed pre-digestion method according to claim 1, characterized in that: the steam explosion process parameters in the step S3 are as follows: the vapor pressure is 0.5-5MPa, the temperature is 100-.

6. An artificial pigeon breast is characterized in that: the raw material of the artificial pigeon milk comprises a pre-digested feed which is prepared by adopting the feed pre-digestion method of any one of claims 1 to 5.

7. The artificial pigeon loft of claim 6, wherein: the raw materials also comprise at least one of grease, dairy products, organic acids, oligosaccharides, amino acids, emulsifiers, vitamins and minerals.

8. The artificial pigeon loft of claim 7, wherein: the raw materials comprise the following components in percentage by weight: 25-60 parts of predigested feed, 10-25 parts of grease, 1-10 parts of dairy product, 0.1-2 parts of organic acid, 0.01-0.5 part of oligosaccharide, 0.50-3.5 parts of amino acid, 0.1-2 parts of emulsifier, 0.01-0.5 part of vitamin and 0.01-0.5 part of mineral substance, wherein based on the mass of the predigested feed, the predigested feed comprises the following components in parts by weight: 10-20 parts of pea, 10-20 parts of soybean, 5-20 parts of corn and 0.01-0.05 part of traditional Chinese medicine.

9. The artificial pigeon loft of claim 7, wherein: the oil is at least one of soybean oil, coconut oil and fish oil;

the organic acid is at least one of citric acid, lactic acid, benzoic acid and potassium sorbate;

the oligosaccharide is at least one of fructo-oligosaccharide, galacto-oligosaccharide and chitosan oligosaccharide;

the amino acid is methionine or lysine;

the emulsifier is at least one of lecithin, monoglyceride and xanthan gum;

the vitamin is at least one of vitamin A, vitamin D, vitamin E, vitamin B2, vitamin B6, vitamin B12, nicotinic acid, folic acid, calcium pantothenate and biotin;

the mineral is a mineral containing at least one element of copper, iron, zinc and manganese.

10. A method of preparing artificial pigeon milk according to any one of claims 6 to 9, comprising the steps of: