CN109221737B - Antibiotic-free fermented feed for weaned piglets and preparation method and application thereof - Google Patents

Antibiotic-free fermented feed for weaned piglets and preparation method and application thereof Download PDF

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CN109221737B
CN109221737B CN201811295681.3A CN201811295681A CN109221737B CN 109221737 B CN109221737 B CN 109221737B CN 201811295681 A CN201811295681 A CN 201811295681A CN 109221737 B CN109221737 B CN 109221737B
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powder
tea seed
seed meal
yeast
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赵海燕
杨庆利
朱英莲
于春娣
唐娟
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Guizhou Wuzi Feed Co.,Ltd.
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Qingdao Agricultural University
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    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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    • A23K10/00Animal feeding-stuffs
    • A23K10/10Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/16Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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    • A23K10/00Animal feeding-stuffs
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    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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    • A23K10/00Animal feeding-stuffs
    • A23K10/30Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
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    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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Abstract

The invention discloses an antibiotic-free fermented feed for weaned pigs, a preparation method and application thereof, and belongs to the technical field of feed fermentation. The invention relates to an antibiotic-free fermented feed for weaned pigs, which comprises the following components in parts by weight: 40-50 parts of corn flour, 15-25 parts of fermented tea seed meal, 15-25 parts of whole milk powder, 2-5 parts of jerusalem artichoke powder, 2-5 parts of yeast extract, 2-5 parts of fish meal, 0.5-1.5 parts of oyster powder, 0.2-1 part of water-supply stone powder and 0.05-0.1 part of vitamin complex. The antibiotic-free fermented feed for the weaned piglets can improve the growth performance of the piglets, reduce the feed-weight ratio, increase the survival rate, enhance the digestion and absorption functions of the piglets, reduce the diarrhea rate, improve the survival rate and reduce the occurrence of edema diseases.

Description

Antibiotic-free fermented feed for weaned piglets and preparation method and application thereof
Technical Field
The invention belongs to the technical field of feed fermentation, and particularly relates to an antibiotic-free fermented feed for weaned pigs, a preparation method and application thereof.
Background
Edema disease of piglets is an acute, highly lethal infectious disease of piglets caused by hemolytic escherichia coli. The disease mainly occurs to piglets weaned for 5-15 days, the sick piglets are poor in mental status, poor in appetite or abolished, like drinking water, eyelid and head edema, convulsion, cold tremor, ataxia and hind limb paralysis, the disease course is fast, the death rate is over 90 percent, the development of the pig industry is severely restricted, and huge economic loss is caused to a farm.
Weaning stress, nutritional stress and environmental factors are the main causes of the disease. The main solutions at present are: 1) a weaning mode of removing mother and leaving baby is adopted, so that the stress response caused by environmental change is reduced; 2) the feed is added with multiple vitamins, trace elements and amino acids to improve immunity; 3) antibiotic therapy; 4) treating with Chinese medicinal materials. The addition of nutrient substances can prevent edema diseases to a certain extent, but the edema diseases cannot be completely prevented and treated, and the adjustment of nutrient components can be used as an auxiliary prevention and treatment means; the use of antibiotics can achieve satisfactory results in a short period, and pathogenic microorganisms can generate drug resistance to the antibiotics in the past, so that the antibiotics do not accord with sustainable development strategies; the traditional Chinese medicine components are firstly discovered to be used for treating human diseases, the difference between animal and human body structures is large, the balance of yin and yang and transformation of qi and body fluid of an animal organism are not disclosed, the blindly used traditional Chinese medicine components can possibly obtain better effect but can also disturb the balance of the animal organism, in addition, the special smell of the traditional Chinese medicine reduces the food calling performance, and the food consumption of weaned piglets is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a green and safe piglet feed which can improve the immunity of weaned piglets, reduce diarrhea of piglets and prevent edema diseases without adding antibiotics, and the invention also aims to provide a preparation method of the feed.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
40-50 parts of corn flour, 15-25 parts of fermented tea seed meal, 15-25 parts of whole milk powder, 2-5 parts of jerusalem artichoke powder, 2-5 parts of yeast extract, 2-5 parts of fish meal, 0.5-1.5 parts of oyster powder, 0.2-1 part of water-supply stone powder and 0.05-0.1 part of vitamin complex.
On the basis of the scheme, the antibiotic-free fermented feed for the weaned piglets comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast extract, 3 parts of fish meal, 1 part of oyster powder, 0.5 part of water-supply stone powder and 0.08 part of compound vitamin.
On the basis of the scheme, the preparation method of the fermented tea seeds comprises the following steps:
(1) crushing tea seed meal, sieving with a 20-mesh sieve, sterilizing with high-pressure steam at 121 ℃ for 30min, and cooling to room temperature after sterilization;
(2) adjusting the water content of the sterilized tea seed meal to be 90%, and adding biological enzyme into the tea seed meal for enzymolysis;
(3) adding 1.5-2.0% of compound microbial agent into the tea seed meal powder after enzymolysis, and fermenting for 24-36 h at 32 ℃;
(4) after the fermentation is finished, adding mannitol accounting for 5 percent of the total weight into the fermentation product, uniformly mixing, and carrying out vacuum freeze drying to obtain powder, thus obtaining the fermented tea seed meal.
On the basis of the scheme, the biological enzyme enzymolysis treatment comprises the following steps:
adding lipase and neutral protease into tea seed meal powder with the water content of 90%, wherein the addition amount of the lipase is 2 u/g; the addition amount of the neutral protease is 0.5 u/g; after being uniformly mixed, the mixture is treated for 2.5 to 4 hours at the temperature of 40 ℃ and at the pH value of 7.5; treating at 50 deg.C for 30 min; after the enzymolysis is finished, the mixture is treated for 10min at 100 ℃ and cooled to room temperature.
On the basis of the scheme, the compound microbial agent is as follows: enterococcus faecalis, lactobacillus rhamnosus, bacillus coagulans and bifidobacterium adolescentis are mixed according to the mass ratio of 2: 1.5: 2: 1.
On the basis of the scheme, the yeast extract is prepared by mixing yeast cell walls and yeast contents according to the weight ratio of 1: 2.5.
On the basis of the scheme, the preparation method of the yeast cell wall comprises the following steps: centrifuging the yeast zymocyte liquid to collect wet thalli, cleaning with sterile water for 2 times, adding purified water with 2 times of the weight of the wet thalli, performing ultrasonic wall breaking treatment, incubating at 35 ℃ for 30min, centrifuging to collect yeast cell walls, and drying into powder to obtain the yeast zymocyte liquid;
the preparation method of the yeast content comprises the following steps: freeze drying the supernatant to obtain powder.
On the basis of the scheme, the yeast zymocyte liquid is mixed bacterium liquid of candida utilis and saccharomyces cerevisiae in the mass ratio of 1: 1.
On the basis of the scheme, the preparation method of the antibiotic-free fermented feed for the weaned piglets comprises the following steps:
(1) weighing Jerusalem artichoke powder, yeast extract, fish meal, oyster powder, water-supply stone powder and compound vitamin, and uniformly mixing to obtain a mixture A;
(2) uniformly mixing the whole milk powder, the fermented tea seed meal and the corn flour according to the amount to obtain a mixture B;
(3) and mixing A and B uniformly to obtain the product.
The antibiotic-free fermented feed for the weaned pigs prepared by the method is applied to improving the immunity of the weaned pigs and preventing and treating edema disease of the weaned pigs.
The water-feeding stone is purchased from the Shanghai Co Ltd of ink Teng, and is mechanically ground into powder and sieved by a sieve of 80 meshes;
the jerusalem artichoke powder is purchased from the Biotech company Limited of Feng and Hei in Xian;
the compound vitamin is a vitamin premix feed B223 for nourishing livestock and poultry, and is purchased from eight-animal science and technology Limited company in New rural areas;
the lipase is purchased from Ningxia Shensheng industry group GmbH, and has enzyme activity of 10000 u/g;
the neutral protease is purchased from Ningxia Shengshi group of industries, Inc., and the enzyme activity is 50000 u/g;
enterococcus faecalis (Enterococcus faecalis) No.: CICC 23658, China center for the preservation and management of industrial microbial strains;
the Lactobacillus rhamnosus (Lactobacillus rhamnosus) is Lactobacillus rhamnosus W27 with the preservation number of CGMCC No. 11387;
bacillus coagulans (Bacillus coagulosns) No.: CICC 21736, China center for culture Collection of Industrial microorganisms;
bifidobacterium adolescentis CICC6178, china industrial microbial strain preservation management center;
candida utilis (Candida utilis) is numbered AS2.281, Beina Chuanglian Biotech limited;
saccharomyces cerevisiae (Saccharomyces cerevisiae) with the number of ACCC 20065, China agricultural microbial strain preservation management center.
The technical scheme of the invention has the advantages that:
the antibiotic-free fermented feed for the weaned piglets can improve the growth performance of the piglets, reduce the feed-weight ratio, increase the survival rate, enhance the digestion and absorption functions of the piglets, reduce the diarrhea rate, improve the survival rate and reduce the occurrence of edema diseases.
The tea seed meal in the antibiotic-free fermented feed is prepared by microbial fermentation after enzymolysis, lipase can degrade residual oil components in the tea seed meal, neutral protease can degrade macromolecular protein components, and the tea seed meal after enzymolysis is more favorable for digestion and absorption of piglets; in addition, the tea seed meal subjected to enzymolysis has a loose structure, so that microbial fermentation is facilitated; the compound microorganism fermentation can increase the content of mycoprotein and the content of organic acid in tea seed meal, so that the fermented tea seed meal is sour and sweet and palatable, in addition, the compound microorganism produces a large amount of probiotics through fermentation and reproduction, the probiotics enter the intestinal tract of animals through food, the stability of the intestinal tract environment can be adjusted, the reproduction of pathogenic microorganisms is inhibited, in addition, the enterococcus faecalis can produce natural antibiotics, so that the health of organisms is maintained, and the growth of pathogenic escherichia coli is inhibited.
The jerusalem artichoke powder contains a large amount of starch, inulin, fructose and water-soluble dietary fiber, promotes the growth and the propagation of probiotics, increases the gastrointestinal peristalsis, and promotes the discharge of toxins and excrement; further enhancing the effect of the probiotics on inhibiting the growth of pathogenic microorganisms.
The yeast cell content contains a large amount of polypeptide, amino acid, vitamin and trace elements, the nutrition is rich, the yeast cell wall is rich in beta-glucan and mannan, and the yeast cell wall has various physiological functions of enhancing immunity, preventing and treating diseases, promoting growth, relieving stress, adsorbing mycotoxin, supplementing nutrition and the like. In general, active yeast is surrounded by a solid cell wall structure, and the contents are difficult to release. The invention uses ultrasonic wall breaking technology to completely release the yeast content, incubates at 35 ℃ and degrades the content under the action of own biological enzyme to form micromolecule active substance which is absorbed by organism. The yeast content combines with yeast cell wall components to play a role in promoting growth, improving immunity and adsorbing toxins and harmful microorganisms.
The pumice, also called absorbent stone, is fossil of calcium carbonate moss plants, has a natural porous structure and contains rich trace elements, and can be matched with yeast cell walls to adsorb toxins and harmful microorganisms together, promote gastrointestinal motility and discharge toxins.
The components in the antibiotic-free fermented feed are matched with each other and complement each other, so that the propagation of probiotics is promoted, the growth of pathogenic microorganisms is inhibited, toxins and the pathogenic microorganisms are adsorbed, the gastrointestinal motility is promoted, the toxin discharge is accelerated, the immunity is improved, the diarrhea rate is reduced, and the growth is promoted.
Detailed Description
Terms used in the present invention have generally meanings as commonly understood by one of ordinary skill in the art, unless otherwise specified.
The present invention will be described in further detail with reference to the following data in conjunction with specific examples. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
The method for fermenting the tea seed meal comprises the following steps:
(1) crushing tea seed meal, sieving with a 20-mesh sieve, sterilizing with high-pressure steam at 121 ℃ for 30min, and cooling to room temperature after sterilization;
(2) adjusting the water content of the sterilized tea seed meal to be 90%, and adding lipase and neutral protease into the tea seed meal, wherein the addition amount of the lipase is 2 u/g; the addition amount of the neutral protease is 0.5 u/g; after being uniformly mixed, the mixture is treated for 2.5 to 4 hours at the temperature of 40 ℃ and at the pH value of 7.5; treating at 50 deg.C for 30 min; after the enzymolysis is finished, processing for 10min at 100 ℃, and cooling to room temperature;
(3) adding 1.5-2.0% of compound microbial agent into the tea seed meal powder after enzymolysis, and fermenting for 24-36 h at 32-35 ℃;
the compound microbial agent is as follows: enterococcus faecalis, lactobacillus rhamnosus, bacillus coagulans and bifidobacterium adolescentis are mixed according to the mass ratio of 2: 1.5: 2: 1.
(4) After the fermentation is finished, adding mannitol accounting for 5 percent of the total weight into the fermentation product, uniformly mixing, and carrying out vacuum freeze drying to obtain powder, thus obtaining the fermented tea seed meal.
The viable count of the enterococcus faecalis is 1 multiplied by 109CFU/g;
The viable count of the lactobacillus rhamnosus is 1 multiplied by 109CFU/g;
The viable count of the bacillus coagulans is 1 multiplied by 108CFU/g;
The number of viable Bifidobacterium adolescentis is 1 × 109CFU/g。
First, the influence of fermentation on the nutrient components of tea seed meal
Test grouping
Example 1 group: tea seed meal fermented by the method of example 1;
control group 1: example 1 tea seed meal fermented directly without enzymatic hydrolysis;
control group 2: example 1 tea seed meal which was only enzymatically hydrolyzed and not microbially fermented;
blank control group: crushing the tea seed meal into powder of 20 meshes;
the contents of tea saponin, crude protein, reducing sugar, organic matters, organic acid and crude fiber in the tea seed meal of each group are measured as shown in table 1:
TABLE 1 Effect of fermentation on the nutritional content of tea seed meal (%)
Group of EXAMPLE 1 group Control group 1 Control group 2 Blank control group
Tea saponin 1.38 4.05 7.16 10.52
Crude protein 20.65 17.27 13.12 12.76
Reducing sugar 0.98 1.18 1.24 1.48
Organic matter 70.11 67.58 66.81 66.53
Organic acids 1.27 0.84 0.33 0.35
Coarse fiber 11.43 18.47 17.85 23.16
As can be seen from table 1, the content of tea saponin in the tea seed meal prepared by the enzymolysis and fermentation in example 1 is significantly reduced, the content of crude protein, organic matter and organic acid is significantly increased, and the content of reducing sugar and crude fiber is significantly reduced, compared with the control group and the blank control group.
Example 2
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
40 parts of corn flour, 25 parts of fermented tea seed meal, 25 parts of whole milk powder, 2 parts of jerusalem artichoke powder, 2 parts of yeast extract, 2 parts of fish meal, 0.5 part of oyster powder, 0.2 part of water stone powder and 0.05 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the preparation method of the yeast extract comprises the following steps:
candida utilis (Candida utilis) is numbered AS2.281, Beina Chuanglian Biotech limited;
the number of the Saccharomyces cerevisiae (Saccharomyces cerevisiae) is ACCC 20065, China agricultural microbial strain preservation management center;
A. respectively inoculating candida utilis and saccharomyces cerevisiae into a liquid fermentation culture medium, culturing for 3d at the temperature of 30-35 ℃, respectively centrifugally collecting wet thalli of the candida utilis and the saccharomyces cerevisiae, and mixing according to the mass ratio of 1: 1;
the liquid fermentation culture medium comprises: 40g/L glucose, 10g/L, KH peptone2PO42g/L、MgSO4·7H2O 0.3g/L, adding water to a constant volume of 1L; sterilizing with high pressure steam at 121 deg.C for 15 min;
B. adding sterile water into the mixed wet thalli to clean for 2 times, adding purified water with the weight being 2 times that of the wet thalli, performing ultrasonic wall breaking treatment, performing ultrasonic power of 500-600W for 10-15 min, and radiating for 10 s; incubating the liquid after the ultrasonic wall breaking treatment at 35 ℃ for 30min, centrifuging and collecting the yeast cell wall, and drying into powder to obtain the yeast cell wall; and freeze-drying the supernatant into powder to obtain the yeast content.
C. Mixing the yeast cell wall and the yeast content according to the weight ratio of 1: 2.5 to obtain the yeast extract.
The preparation method of the antibiotic-free fermented feed for the weaned piglets comprises the following steps:
(1) weighing Jerusalem artichoke powder, yeast extract, fish meal, oyster powder, water-supply stone powder and compound vitamin, and uniformly mixing to obtain a mixture A;
(2) uniformly mixing the whole milk powder, the fermented tea seed meal and the corn flour according to the amount to obtain a mixture B;
(3) and mixing A and B uniformly to obtain the product.
Example 3
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast extract, 3 parts of fish meal, 1 part of oyster powder, 0.5 part of water-supply stone powder and 0.08 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the yeast extract was the same as in example 2;
the preparation method of the antibiotic-free fermented feed for weaned piglets is the same as that of the example 2.
Example 4
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
50 parts of corn flour, 15 parts of fermented tea seed meal, 15 parts of whole milk powder, 5 parts of jerusalem artichoke powder, 5 parts of yeast extract, 5 parts of fish meal, 1.5 parts of oyster powder, 1 part of ground limestone and 0.1 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the yeast extract was the same as in example 2;
the preparation method of the antibiotic-free fermented feed for weaned piglets is the same as that of the example 2.
Comparative example 1
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast extract, 3 parts of fish meal, 1 part of oyster powder and 0.08 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the yeast extract was the same as in example 2;
the preparation method of the antibiotic-free fermented feed for weaned piglets is the same as that of the example 2.
Comparative example 2
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast extract, 3 parts of fish meal, 1 part of oyster powder, 0.5 part of water-supply stone powder and 0.08 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the yeast extract is the single saccharomyces cerevisiae extract in example 2;
the preparation method of the antibiotic-free fermented feed for weaned piglets is the same as that of the example 2.
Comparative example 3
The nonreactive fermented feed for the weaned piglets comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast, 3 parts of fish meal, 1 part of oyster powder, 0.5 part of water-supply stone powder and 0.08 part of compound vitamin.
The fermented tea seed meal is the fermented tea seed meal prepared by the method in the embodiment 1;
the yeast is yeast powder formed by mixing and drying wet thalli of saccharomyces cerevisiae and candida utilis according to the mass ratio of 1: 1;
the preparation method of the antibiotic-free fermented feed for weaned piglets is the same as that of the example 2.
Secondly, the influence of the antibiotic-free fermented feed on the growth performance of the weaned piglets
Test grouping
Examples 2-4 and comparative examples 1-3;
test method
140 healthy 28-day-old and close-weight Du x Long x big weaned piglets were selected and randomly divided into 7 groups of 4 replicates each, with 5 replicates each, wherein: 1-3 groups of the antibiotic-free fermented feed are fed with the antibiotic-free fermented feed of examples 1-3 respectively, and 4-6 groups of the antibiotic-free fermented feed of comparative examples 1-3 are fed with the antibiotic-free fermented feed respectively; group 7 was fed regular weaned piglet diet (table 2) and scored as a blank control.
And (3) during the test period of 30d, weighing the weight of the pig at the beginning and the end of the test respectively, and performing blind test in the whole test process. Raising in a fence mode in the whole test period, and feeding for 3-4 times a day. Cleaning the feed tank at 07:00 a.m. every day, counting feed intake, freely drinking water, and cleaning the barn for 1 time respectively in the morning and afternoon. Temperature and humidity were recorded daily. The daily management and immunization program are carried out according to the conventional method.
TABLE 2 basic daily ration raw material composition and nutritional ingredients
Item Content (wt.)
Raw material composition%
Puffed corn 38.5
Broken rice 13.7
Puffed soybean 10.0
Soybean meal 10.8
Fish meal 8.3
Whey powder 12.7
Sucrose 2.0
Premix compound 4.0
Nutritional index
Dry matter% 89.11
Digestion energy, MJ/kg 13.92
Crude protein% 19.66
Calcium content% 0.80
Total phosphorus% 0.69
Effective phosphorus% 0.51
Lysine% 1.46
Methionine + cystine% 0.72
Note:the premix is provided for each kilogram of daily ration: vitamin A250000IU, vitamin D31600IU, vitamin E48.3 mg, vitamin K346.6mg of vitamin B67.5mg, 42mg nicotinic acid, 10mg pantothenic acid, 150mg iron, 160mg zinc, 10mg copper and 70mg manganese.
The results of measuring the feed-to-weight ratio, the piglet diarrhea rate, the piglet survival rate and the edema disease rate are shown in table 3:
TABLE 3 Effect of antibiotic-free fermented feed on growth Performance of weaned piglets
Group of Average daily gain g Material to weight ratio The rate of diarrhea% Survival rate% The disease rate of edema disease%
Example 2 411.85 1.62 1.04 95 5
Example 3 417.63 1.60 0.62 100 0
Example 4 413.57 1.62 0.98 95 0
Comparative example 1 410.76 1.64 1.47 95 5
Comparative example 2 402.35 1.65 1.94 95 5
Comparative example 3 394.71 1.66 3.71 90 10
Blank control group 347.66 1.70 6.45 80 20
As can be seen from table 3, the average daily gain of piglets in examples 2 to 4 is significantly higher than that of other groups, the feed-weight ratio, diarrhea rate and edema disease rate are significantly lower than those of other groups, and the survival rate is also significantly higher than those of other groups.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (3)

1. The antibiotic-free fermented feed for weaned piglets is characterized by comprising the following components in parts by weight: the composition comprises the following components in parts by weight:
40-50 parts of corn flour, 15-25 parts of fermented tea seed meal, 15-25 parts of whole milk powder, 2-5 parts of jerusalem artichoke powder, 2-5 parts of yeast extract, 2-5 parts of fish meal, 0.5-1.5 parts of oyster powder, 0.2-1 part of water-supply stone powder and 0.05-0.1 part of vitamin complex;
the yeast extract is prepared by mixing yeast cell walls and yeast contents according to the weight ratio of 1: 2.5; the preparation method of the yeast cell wall comprises the following steps: centrifuging the yeast zymocyte liquid to collect wet thalli, cleaning with sterile water for 2 times, adding purified water with 2 times of the weight of the wet thalli, performing ultrasonic wall breaking treatment, incubating at 35 ℃ for 30min, centrifuging to collect yeast cell walls, and drying into powder to obtain the yeast zymocyte liquid; the preparation method of the yeast content comprises the following steps: freeze drying the supernatant to obtain powder; the yeast zymocyte liquid is a mixed liquid of candida utilis and saccharomyces cerevisiae with the mass ratio of 1: 1;
the preparation method of the fermented tea seeds comprises the following steps:
(1) crushing tea seed meal, sieving with a 20-mesh sieve, sterilizing with high-pressure steam at 121 ℃ for 30min, and cooling to room temperature after sterilization;
(2) adjusting the water content of the sterilized tea seed meal to be 90%, and adding biological enzyme into the tea seed meal for enzymolysis;
(3) adding 1.5-2.0% of compound microbial agent into the tea seed meal powder after enzymolysis, and fermenting for 24-36 h at 32-35 ℃;
(4) after the fermentation is finished, adding mannitol accounting for 5 percent of the total weight into the fermentation product, uniformly mixing, and carrying out vacuum freeze drying to obtain powder, thus obtaining fermented tea seed meal;
the biological enzyme enzymolysis treatment comprises the following steps:
adding lipase and neutral protease into tea seed meal powder with the water content of 90%, wherein the addition amount of the lipase is 2 u/g; the addition amount of the neutral protease is 0.5 u/g; after being uniformly mixed, the mixture is treated for 2.5 to 4 hours at the temperature of 40 ℃ and at the pH value of 7.5; treating at 50 deg.C for 30 min; after the enzymolysis is finished, processing for 10min at 100 ℃, and cooling to room temperature;
the compound microbial agent is as follows: enterococcus faecalis, lactobacillus rhamnosus, bacillus coagulans and bifidobacterium adolescentis are mixed according to the mass ratio of 2: 1.5: 2: 1.
2. The antibiotic-free fermented feed for weaned pigs according to claim 1, characterized in that: the composition comprises the following components in parts by weight:
45 parts of corn flour, 20 parts of fermented tea seed meal, 20 parts of whole milk powder, 3 parts of jerusalem artichoke powder, 3 parts of yeast extract, 3 parts of fish meal, 1 part of oyster powder, 0.5 part of water-supply stone powder and 0.08 part of compound vitamin.
3. The method for producing the antibiotic-free fermented feed for weaned pigs according to claim 1 or 2, characterized in that: the method comprises the following steps:
(1) weighing Jerusalem artichoke powder, yeast extract, fish meal, oyster powder, water-supply stone powder and compound vitamin, and uniformly mixing to obtain a mixture A;
(2) uniformly mixing the whole milk powder, the fermented tea seed meal and the corn flour according to the amount to obtain a mixture B;
(3) and mixing A and B uniformly to obtain the product.
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