CN110710605A - Broussonetia papyrifera leaf fermented feed for improving quality of goat meat and preparation method thereof - Google Patents

Broussonetia papyrifera leaf fermented feed for improving quality of goat meat and preparation method thereof Download PDF

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CN110710605A
CN110710605A CN201911038504.1A CN201911038504A CN110710605A CN 110710605 A CN110710605 A CN 110710605A CN 201911038504 A CN201911038504 A CN 201911038504A CN 110710605 A CN110710605 A CN 110710605A
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broussonetia papyrifera
vitamin
fermented feed
goat meat
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莫家会
庄海燕
何莫斌
李桂秋
姚冬情
何立贵
孟观范
韦炳耐
梁春意
陈兆静
韦汉文
蓝吉伟
韦承波
李显
覃健波
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Guangxi Zhuang Autonomous Region Baipeng Breeding Farm
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K50/00Feeding-stuffs specially adapted for particular animals
    • A23K50/10Feeding-stuffs specially adapted for particular animals for ruminants
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K10/00Animal feeding-stuffs
    • A23K10/10Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/12Animal feeding-stuffs obtained by microbiological or biochemical processes by fermentation of natural products, e.g. of vegetable material, animal waste material or biomass
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • 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
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/174Vitamins
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/20Inorganic substances, e.g. oligoelements
    • A23K20/30Oligoelements

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Abstract

The invention provides a broussonetia papyrifera leaf fermented feed for improving goat meat quality and a preparation method thereof, belonging to the technical field of goat feeds, wherein the feed comprises a base material and an additive, and the base material comprises the following raw materials in parts by weight: 40-60 parts of soybean meal, 10-20 parts of bran coat, 65-90 parts of broussonetia papyrifera leaves, 30-50 parts of ramie leaves, 10-15 parts of broussonetia papyrifera fruits, 8-12 parts of traditional Chinese medicine residues and 0.5-1.5 parts of biological microbial inoculum; the additive comprises the following raw materials in parts by weight: 3-5 parts of salt, 2-6 parts of baking soda, 1-5 parts of shrimp shell powder, 0.2-0.5 part of probiotics, 0.1-0.3 part of composite vitamin and 0.2-0.3 part of trace elements. The invention provides a preparation method for preparing the feed. The invention has the advantages of wide raw material source, reduced product production cost, simple preparation method, better palatability and stability, and improved goat meat quality and nutritive value.

Description

Broussonetia papyrifera leaf fermented feed for improving quality of goat meat and preparation method thereof
Technical Field
The invention relates to the technical field of feed processing, in particular to a paper mulberry leaf fermented feed for improving goat meat quality and a preparation method thereof.
Background
The paper mulberry has the characteristics of fast growth, wide adaptability, strong sprouting power, easy propagation, smoke resistance and strong atmospheric pollution resistance, and is an important tree species for greening and bank protection. The paper mulberry is a treasure, the bark is a high-quality paper making and textile raw material, the bark juice and the fruit can be used for medicine, especially, the protein content of paper mulberry leaves is rich, the protein content reaches 24.0% by analysis, and the paper mulberry is safe and nontoxic, belongs to a good protein feed, and can also be used as a health food additive. Therefore, the utilization potential of the broussonetia papyrifera resource is huge.
China is the country with the largest ramie yield and planting area, and the ramie by-product, ramie leaves, is extremely rich in resources. But have not been fully utilized for a long time. The ramie leaves have rich nutrient content and can be eaten and fed. The content of crude protein in the dried ramie leaves is up to 20.5 percent, the content of crude fat is 6.7 percent, the content of phosphorus is 0.39 percent, and the content of calcium is 4.6 percent. In addition, ramie leaves also contain 8 amino acids essential to humans and animals. Through years of experiments, the results show that the ramie leaves have excellent effects of feeding chickens, pigs and fishes.
The proportion of livestock production in the total agricultural value in China reaches 30.8%, and the livestock production is particularly suitable for vast poor areas and is also a main area for sheep raising, and the sheep raising becomes a main income source for vast farmers. The breeding process does not attach enough importance to the feed improvement work, so that the goat grows and develops slowly, has small body size, low meat yield and poor meat quality, the weight of the adult male goat and the weight of the adult female goat are only 35Kg and 24Kg respectively, the investment is large, the economic benefit is low, and the development trend of the consumer market cannot be adapted. Therefore, the research and development of the broussonetia papyrifera leaf fermented feed are needed, and the meat quality, the flavor and the taste of the goats are better through feeding.
Disclosure of Invention
The invention provides the broussonetia papyrifera leaf fermented feed for improving the goat meat quality and the preparation method thereof, and the broussonetia papyrifera leaf fermented feed has the advantages of wide raw material source, reduction in the production cost of the feed, simple preparation method, capability of improving the gastrointestinal absorption efficiency of the goat and enhancing the disease resistance, and the raised goat meat has good quality and good taste.
The technical scheme adopted by the invention is as follows:
the paper mulberry leaf fermented feed for improving the quality of goat meat comprises a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 40-60 parts of soybean meal, 10-20 parts of bran coat, 65-90 parts of broussonetia papyrifera leaves, 30-50 parts of ramie leaves, 10-15 parts of broussonetia papyrifera fruits, 8-12 parts of traditional Chinese medicine residues and 0.5-1.5 parts of biological microbial inoculum;
the additive comprises the following raw materials in parts by weight: 3-5 parts of salt, 2-6 parts of baking soda, 1-5 parts of shrimp shell powder, 0.2-0.5 part of probiotics, 0.1-0.3 part of composite vitamin and 0.2-0.3 part of trace elements.
Further, the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to the mass ratio of 3-6:4-8: 2-5.
Further, the Chinese medicine residues are products obtained by respectively extracting the Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shavings residues according to the mass ratio of 10-15:3-5: 4-9.
Further, the compound vitamin is a composition formed by combining vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to any proportion.
Preferably, the compound vitamin is a composition prepared from vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to the mass ratio of 2-5:5-7:2-6:3: 2-7.
Further, the trace elements are a composition formed by combining ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to any proportion.
Preferably, the trace elements are a composition prepared from ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to the mass ratio of 1-1.5:0.5-1:2-4:1: 5-7.
The invention provides a preparation method of the fermented feed, which comprises the following steps:
s1, cleaning the broussonetia papyrifera leaves and the ramie leaves, airing and then cutting into pieces to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and the auxiliary materials into a fermentation tank for fermentation reaction to obtain a fermentation material;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
Further, in step S1, the raw material is pulverized to a length of 5 to 10 mm.
Further, in step S2, the fermentation reaction is carried out at a temperature of 28-35 ℃ for 65-75 hours in the fermenter.
Further, in step S2, the auxiliary material is a sucrose solution or a maltose solution with a mass concentration of 1-1.5%.
Further, in step S2, the amount of the auxiliary material is 2.0 to 2.5 times the weight of the raw material powder.
The raw materials of the invention, namely salt, sodium bicarbonate, shrimp shell powder, probiotics, biological agent, trace elements and compound vitamins, are purchased from domestic and foreign breeding raw material companies and are directly used without any processing.
The invention has the following beneficial effects:
1. the invention adopts ramie leaves and broussonetia papyrifera leaves as main raw materials, wherein, the ramie leaves have higher content of crude protein and are rich in phosphorus content, calcium and a plurality of amino acid components; the content of protein in the broussonetia papyrifera leaves is up to 20-30%, the nutrient components such as amino acid, vitamin, carbohydrate, trace elements and the like are also very rich, and the breeding efficiency by adding the broussonetia papyrifera leaves is up to 46-108% through a feeding contrast test; the Broussonetia papyrifera fruit is sour and sweet in taste, has the effects of promoting urination, tonifying kidney and strengthening bones and muscles, also contains various nutritional ingredients such as amino acids and mineral substances, and can promote the improvement of the immunity and prevent diseases.
2. The Chinese medicine residues including the gynostemma pentaphylla residues, the eucommia ulmoides residues and the bamboo shaving residues are added, are mostly discarded materials, are sweet in taste, have the effects of clearing heat, harmonizing stomach and reducing fat content in a goat body, are diuretic and detoxifying, are beneficial to removing wastes in the goat body, can greatly improve the absorption efficiency of the goat, reduce the gastrointestinal diseases, change waste into valuable, save resources and protect the environment; the soybean meal and the bran coat have high content of crude fiber, protein and sugar, the efficiency of the soybean meal and the bran coat consumed by intestinal tracts is greatly improved by fermentation and reutilization, the product is obtained by reasonable proportioning, the palatability and the nutritive value are good, the soybean meal and the bran coat can be widely applied to livestock and poultry breeding, the quality of livestock and poultry can be effectively improved, and the economic benefit is improved.
3. According to the invention, the biological agent is added into the base material for fermentation, so that the obtained extract is uniformly fermented, has a sour and fragrant smell and good palatability, can promote effective decomposition of plant protein, is high in utilization rate, and can effectively ensure that the plant protein is not damaged; the absorption and conversion of the vegetable protein are promoted, the digestion is easy after eating, the gastrointestinal burden of the goat can be better reduced by the fermented substances, and the feed absorption efficiency is improved; the feed additive is added with additives including salt, baking soda, shrimp shell powder, probiotics, compound vitamins and trace elements, so that the obtained feed additive is balanced in nutrition, the gastrointestinal tract digestion function of the goat can be effectively improved, the absorption efficiency of the goat can be greatly improved, the disease resistance can be enhanced, the feed prepared from the feed additive has a remarkable prevention and treatment effect on the goat cold, and the influence on meat quality due to the overuse of antibiotics is avoided; the raised goat meat has good quality, good taste, safety and no toxic or side effect, is widely applied to livestock and poultry breeding, and can effectively improve economic benefit.
Detailed Description
The following examples may assist those skilled in the art in a more complete understanding of the present invention, but are not intended to limit the invention in any way.
Example 1
The paper mulberry leaf fermented feed for improving the quality of goat meat comprises a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 40 parts of soybean meal, 10 parts of bran coat, 65 parts of broussonetia papyrifera leaves, 30 parts of ramie leaves, 10 parts of broussonetia papyrifera fruits, 8 parts of traditional Chinese medicine residues and 0.5 part of biological agent;
the additive comprises the following raw materials in parts by weight: 3 parts of salt, 2 parts of baking soda, 1 part of shrimp shell powder, 0.2 part of probiotics, 0.1 part of composite vitamin and 0.2 part of trace elements;
the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to the mass ratio of 3:4: 2;
the traditional Chinese medicine residues are products obtained by respectively extracting traditional Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shaving residues according to a mass ratio of 10:3: 4;
the compound vitamin is a composition of vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to the mass ratio of 2:5:2:3: 2;
the trace elements are a composition of ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to the mass ratio of 1:0.5:2:1: 5;
the preparation method of the fermented feed comprises the following steps:
s1, cleaning broussonetia papyrifera leaves and ramie leaves, airing, and cutting into 5mm long pieces to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and a 1% sucrose solution into a fermentation tank, and reacting for 65 hours at 28 ℃ in the fermentation tank to obtain a fermentation material; the dosage of the auxiliary material is 2.0 times of the weight of the raw material powder;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
Example 2
The paper mulberry leaf fermented feed for improving the quality of goat meat comprises a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 60 parts of soybean meal, 20 parts of bran coat, 90 parts of broussonetia papyrifera leaves, 50 parts of ramie leaves, 15 parts of broussonetia papyrifera fruits, 12 parts of traditional Chinese medicine residues and 1.5 parts of biological agent;
the additive comprises the following raw materials in parts by weight: 5 parts of salt, 6 parts of baking soda, 5 parts of shrimp shell powder, 0.5 part of probiotics, 0.3 part of composite vitamin and 0.3 part of trace elements;
the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to the mass ratio of 6:8: 5;
the traditional Chinese medicine residues are products obtained by respectively extracting traditional Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shaving residues according to a mass ratio of 15:5: 9;
the compound vitamin is a composition of vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to the mass ratio of 5:7:6:3: 7;
the trace elements are a composition of ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to the mass ratio of 1.5:1:4:1: 7;
the preparation method of the fermented feed comprises the following steps:
s1, cleaning broussonetia papyrifera leaves and ramie leaves, airing, and cutting into 10mm long pieces to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and a sucrose solution with the mass concentration of 1.5% into a fermentation tank, and reacting for 75 hours at the temperature of 35 ℃ in the fermentation tank to obtain a fermented material; the dosage of the auxiliary material is 2.5 times of the weight of the raw material powder;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
Example 3
The paper mulberry leaf fermented feed for improving the quality of goat meat comprises a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 50 parts of soybean meal, 15 parts of bran coat, 80 parts of broussonetia papyrifera leaves, 40 parts of ramie leaves, 13 parts of broussonetia papyrifera fruits, 11 parts of traditional Chinese medicine residues and 1 part of biological agent;
the additive comprises the following raw materials in parts by weight: 4 parts of salt, 4 parts of baking soda, 3 parts of shrimp shell powder, 0.4 part of probiotics, 0.2 part of composite vitamin and 0.25 part of trace elements;
the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to the mass ratio of 4:6: 3;
the traditional Chinese medicine residues are products obtained by respectively extracting traditional Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shaving residues according to a mass ratio of 12:4: 6;
the compound vitamin is a composition of vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to the mass ratio of 3:6:4:3: 5;
the trace elements are a composition prepared from ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to a mass ratio of 1.2:0.8:3:1: 6;
the preparation method of the fermented feed comprises the following steps:
s1, cleaning broussonetia papyrifera leaves and ramie leaves, airing, and cutting into pieces with the length of 8mm to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and the maltose solution with the mass concentration of 1.2% into a fermentation tank, and reacting for 70 hours at the temperature of 30 ℃ in the fermentation tank to obtain a fermented material; the dosage of the auxiliary material is 2.2 times of the weight of the raw material powder;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
Example 4
The paper mulberry leaf fermented feed for improving the quality of goat meat comprises a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 55 parts of bean pulp, 18 parts of bran coat, 80 parts of broussonetia papyrifera leaves, 40 parts of ramie leaves, 12 parts of broussonetia papyrifera fruits, 10 parts of traditional Chinese medicine residues and 1.2 parts of biological agent;
the additive comprises the following raw materials in parts by weight: 4 parts of salt, 5 parts of baking soda, 2 parts of shrimp shell powder, 0.3 part of probiotics, 0.2 part of composite vitamin and 0.27 part of trace elements;
the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to the mass ratio of 5:7: 4;
the traditional Chinese medicine residues are products obtained by respectively extracting traditional Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shaving residues according to a mass ratio of 11:4: 7;
the compound vitamin is a composition of vitamin A, vitamin B, vitamin C, vitamin D and vitamin E according to the mass ratio of 10:1:5:2: 7;
the trace elements are a composition prepared from ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride according to a mass ratio of 7:3:1:9: 2;
the preparation method of the fermented feed comprises the following steps:
s1, cleaning broussonetia papyrifera leaves and ramie leaves, airing, and cutting into 7mm long pieces to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and the maltose solution with the mass concentration of 1.3% into a fermentation tank, and reacting for 68 hours at the temperature of 31 ℃ in the fermentation tank to obtain a fermented material; the dosage of the auxiliary material is 2.4 times of the weight of the raw material powder;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
The feed of comparative example 1 is different from the product of example 3 in that ramie leaves and biological agents are not added.
Comparative example 2 feed, which differs from the product of example 3 in that broussonetia papyrifera leaves, broussonetia papyrifera fruits and herb residues are not added.
1. And (3) breeding goats are bred by using the feed of the examples 1 to 4 and the feed of the comparative examples 1 to 2, 3-month-old Nubian mutton sheep are selected for breeding, 10 goats are selected in each group, the weight and the age in days of the goats in each group are similar, weight gain and meat quality detection is carried out after 5 months of breeding, and all disease incidence conditions during the breeding period are counted, and the results are shown in Table 1.
TABLE 1
Figure BDA0002252209420000061
The following conclusions can be drawn according to the detection results: the weight gain rate of the goats fed by the feed in the embodiments 1-4 of the invention is high, the mutton quality is better than that of the comparative example group, and the incidence of the goat cold and the gastroenteritis are reduced.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The paper mulberry leaf fermented feed for improving the quality of goat meat is characterized by comprising a base material and an additive, wherein the base material comprises the following raw materials in parts by weight: 40-60 parts of soybean meal, 10-20 parts of bran coat, 65-90 parts of broussonetia papyrifera leaves, 30-50 parts of ramie leaves, 10-15 parts of broussonetia papyrifera fruits, 8-12 parts of traditional Chinese medicine residues and 0.5-1.5 parts of biological microbial inoculum;
the additive comprises the following raw materials in parts by weight: 3-5 parts of salt, 2-6 parts of baking soda, 1-5 parts of shrimp shell powder, 0.2-0.5 part of probiotics, 0.1-0.3 part of composite vitamin and 0.2-0.3 part of trace elements.
2. The broussonetia papyrifera leaf fermented feed for improving the goat meat quality as claimed in claim 1, wherein the biological agent is prepared by mixing candida tropicalis, bifidobacterium breve and lactobacillus reuteri according to a mass ratio of 3-6:4-8: 2-5.
3. The broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 1, wherein the traditional Chinese medicine residues are products obtained by respectively extracting traditional Chinese medicines with water, and are prepared by mixing gynostemma pentaphylla residues, eucommia ulmoides residues and bamboo shavings residues according to a mass ratio of 10-15:3-5: 4-9.
4. The broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 1, wherein the vitamin complex is a composition prepared from vitamin A, vitamin B, vitamin C, vitamin D and vitamin E in any proportion.
5. The broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 1, wherein the trace elements are a composition of ferrous sulfate, copper sulfate, calcium carbonate, zinc sulfate and sodium chloride in any proportion.
6. A preparation method of the broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in any one of claims 1 to 5, comprising the following steps:
s1, cleaning the broussonetia papyrifera leaves and the ramie leaves, airing and then cutting into pieces to obtain raw material powder for later use;
s2, injecting the soybean meal, the bran coat, the raw material powder, the traditional Chinese medicine residues, the biological agent and the auxiliary materials into a fermentation tank for fermentation reaction to obtain a fermentation material;
s3, uniformly stirring the fermentation material, the paper mulberry fruit and the additive, adjusting the pH value to be neutral, and preparing into granules to obtain the feed.
7. The method of preparing broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 6, wherein the grinding is performed to a raw material length of 5-10mm in step S1.
8. The method for preparing a broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 6, wherein the fermentation reaction conditions are that the reaction is carried out at a temperature of 28-35 ℃ in a fermentation tank for 65-75 hours in step S2.
9. The method for preparing broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 6, wherein in step S2, the auxiliary material is sucrose solution or maltose solution with a mass concentration of 1-1.5%.
10. The method for preparing broussonetia papyrifera leaf fermented feed for improving goat meat quality as claimed in claim 6, wherein in step S2, the amount of the auxiliary material is 2.0-2.5 times of the weight of the raw material powder.
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CN113243462A (en) * 2021-04-13 2021-08-13 皖西学院 Broussonetia papyrifera feed for chicken and preparation method of broussonetia papyrifera fermented leaves
CN114052127A (en) * 2021-11-10 2022-02-18 贵州省草业研究所 Complete feed for improving growth rate of black goat lambs and preparation method thereof

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Application publication date: 20200121