Compound feed for laying chicks and preparation method of compound feed

Abstract

The invention belongs to the technical field of animal feeds, and discloses a compound feed for laying chicks and a preparation method of the compound feed. According to the invention, enzymolysis cottonseed protein is used as a main protein raw material, and amino acid, a compound enzyme preparation premix, a microbial preparation premix and the like are used as auxiliary materials, so that the compound feed meeting the nutritional requirements of the laying chicks is prepared. On the premise of meeting the growth requirements of the laying chicks and ensuring the egg laying performance in the egg laying period, the enzymolysis cottonseed protein is used for replacing traditional soybean meal, the adverse effect of resistant nutritional ingredients in the soybean meal on the intestinal health of the laying chicks is avoided, meanwhile, the dependency degree on soybean raw material import is reduced, and the feed cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of animal feeds and relates to a compound feed for laying hens and a preparation method thereof. Background Art

[0002] Laying hens have a long growth cycle and grow slower than broilers. They weigh 360 to 420 grams at 5 weeks old. It takes about 120 days from brooding to rearing. The weight of laying hens at 5 weeks of age shows a strong positive correlation with their egg-laying performance during the laying period (Hai-Line Brown Commercial Generation Feeding and Management Manual 2021 Edition). During the feeding process, in order to make the weight of 5-week-old laying hens meet the standard, pure soybean meal diets are often used when designing feed formulas. The amount of soybean meal added in this feed reaches more than 30%. Because soybean meal contains a large amount of resistant nutrients such as mannan and trypsin inhibitors, it directly affects the gastrointestinal health of young laying hens, resulting in early developmental retardation, poor egg-laying performance during the laying period and other disadvantages. On the other hand, soybean raw materials are mainly dependent on imports, which leads to higher feed costs.

[0003] The inventors have previously formulated a dephenolized cottonseed protein feed for Liangfeng broiler breeders (CN112205522A), but since the feed still uses corn and soybean meal as the main protein sources, it cannot avoid the above-mentioned disadvantages of soybean meal protein. In addition, the nutritional requirements of laying hens and broilers are different, so this feed is not suitable for laying hens. This requires further improvement of the existing technology, and on the premise of meeting the growth requirements of laying hens, a laying hen feed that reduces or replaces soybean meal is developed to avoid the adverse effects of soybean meal components. Summary of the invention

[0004] In order to reduce the impact of resistant nutrients in soybean meal on the intestinal health of young laying hens, improve the health of the body, ensure the production performance of laying hens during the laying period, and at the same time give full play to the advantages of raw materials from the production area, reduce the dependence on soybean meal, and reduce feed costs, the present invention provides a compound feed for laying hens and a preparation method thereof.

[0005] Firstly, the invention provides a compound feed for laying hens. The compound feed for laying hens takes enzymolyzed cottonseed protein as a main protein source, and comprises the following components, by weight: 680-730 parts of energy raw materials, 140-160 parts of enzymolyzed cottonseed protein, 40-60 parts of soybean meal, 20-40 parts of corn protein powder, 15-25 parts of fine stone powder, 15-20 parts of amino acids, 13-15 parts of calcium dihydrogen phosphate, 4-8 parts of first-grade sunflower oil, 2-4 parts of premixed feed, 2-3 parts of sodium chloride, 1-3 parts of intestinal health preparation premix, 1-3 parts of pentachlorophenol, 1-1.5 parts of choline chloride, 0.5-1.5 parts of complex enzyme preparation premix and 0.5-1.5 parts of microbial preparation premix.

[0006] Furthermore, the energy raw materials include: corn, puffed corn, and wheat.

[0007] Furthermore, the free gossypol content of the enzymatically hydrolyzed cottonseed protein is ≤ 150 ppm, the crude protein is ≥ 65%, and the total acid is ≥ 4%.

[0008] Furthermore, the components of the amino acids are as follows: by mass percentage, lysine is 43.35%, methionine is 19.08%, threonine is 13.87%, tryptophan is 2.31%, isoleucine is 12.72%, and valine is 8.67%.

[0009] Furthermore, the components of the premixed feed are as follows: by mass percentage, the trace element premix is 66.67% and the vitamin premix is 33.33%;

[0010] The components of the trace element premix are as follows: by mass percentage, iron is 3%, zinc is 4%, copper is 0.4%, manganese is 5%, selenium is 0.02%, iodine is 0.04%, and zeolite powder is 87.54%;

[0011] The components of the vitamin premix are as follows: by mass percentage, vitamin A is 0.93%, vitamin D3 is 0.03%, vitamin E is 13.4%, vitamin B1 is 1%, vitamin B2 is 2.6%, vitamin B6 is 1.9%, niacin is 20%, pantothenic acid is 5%, folic acid is 0.5%, biotin is 0.03%, and rice bran is 54.61%.

[0012] Furthermore, the components of the intestinal health preparation premix are as follows: by mass percentage, the oregano oil premix is 50% and benzoic acid is 50%.

[0013] Furthermore, the components of the complex enzyme preparation premix are as follows: by mass percentage, the xylanase preparation is 8%, the β - glucanase preparation is 2%, the β - mannanase preparation is 2%, the α - galactosidase preparation is 1%, the keratinase preparation is 10%, the pectinase preparation is 4%, the cellulase preparation is 3%, and the rice bran carrier is 70%;

[0014] The enzyme activity of the xylanase preparation is ≥ 3×10 4 U / g, the enzyme activity of the β - glucanase preparation is ≥ 2×10 3 U / g, the enzyme activity of the β - mannanase preparation is ≥ 6×10 3 U / g, the enzyme activity of the α - galactosidase preparation is ≥ 2×10 2 U / g, the enzyme activity of the keratinase preparation is ≥ 1×10 5 U / g, the enzyme activity of the pectinase preparation is ≥ 1×10 3 U / g, and the enzyme activity of the cellulase preparation is ≥ 8×10 2 U / g.

[0015] Furthermore, the components of the microbial preparation premix are: 10% of Clostridium butyricum, 5% of Lactobacillus acidophilus, 3% of Bacillus subtilis, and 82% of rice husk carrier;

[0016] The number of viable bacteria of Clostridium butyricum agent is ≥3.0×10 8 CFU / g, the number of viable bacteria of Lactobacillus acidophilus agent ≥1.0×10 8 CFU / g, the number of viable bacteria of Bacillus subtilis inoculant ≥5.0×10 9 CFU / g.

[0017] On the other hand, the present invention also provides a method for preparing the above-mentioned compound feed for laying hens, comprising: crushing enzymatically hydrolyzed cottonseed protein, corn, puffed corn, and wheat respectively, passing through a 1.5 mm aperture sieve, mixing according to the raw material ratio, and granulating for the first time at 85° C., with a granulation particle size of 4.0 mm, coarsely crushing after cooling, and passing through a 2.5 mm aperture sieve to obtain a semi-finished feed;

[0018] The semi-finished feed is mixed with soybean meal, corn protein powder, fine stone powder, amino acid, calcium dihydrogen phosphate, first-grade sunflower oil, premixed feed, sodium chloride, intestinal health preparation premix, five-grain acid, choline chloride, complex enzyme preparation premix, and microbial preparation premix according to the raw material ratio, and granulated for the second time at 60° C. with a granulation particle size of 3.0 mm. After cooling, the granulated material is passed through a crusher, and the crushed material standard is that 100% can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens.

[0019] Compared with the prior art, the compound feed for laying hens provided by the present invention has the following beneficial effects or advantages.

[0020] 1) The present invention uses enzymatically hydrolyzed cottonseed protein as the main protein raw material. Under the premise of meeting the growth requirements of laying hens and ensuring the egg-laying performance during the laying period, the amount of soybean meal in the formula is reduced from the traditional 31.5% to 4.7%, and the amount is reduced by more than 85%. The present invention avoids the adverse effects of the resistant nutrients in soybean meal on the intestinal health of laying hens, and at the same time reduces the dependence on the import of soybean raw materials, gives full play to the advantages of local raw materials, and reduces feed costs.

[0021] 2) When fed with the compound feed provided by the present invention, the average body weight of 5-week-old laying hens reached 444.67 g, exceeding the standard of "Hai-Line Brown Traditional Cage System Feeding and Management Manual" (published in 2022) by 5.87-23.52% (the standard is 360-420 g); the tibia length at 12 weeks of age was 2.05% higher than that of the control group, and the cumulative egg production at 72 weeks of age was 3.90% higher than that of the control group, which was a significant difference. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] This embodiment provides the preparation of the compound feed for laying hens.

[0025] 1) 140 kg of enzymatically hydrolyzed cottonseed protein, 530 kg of corn, 95 kg of puffed corn and 55 kg of wheat were crushed separately and passed through a 1.5 mm pore size sieve, and then granulated for the first time at 85° C. after mixing, with a granulation particle size of 4.0 mm, and then coarsely crushed after cooling, and passed through a 2.5 mm pore size sieve to obtain a semi-finished feed.

[0026] 2) The semi-finished feed is mixed with 40kg soybean meal, 20kg corn protein powder, 15kg fine stone powder, 15kg amino acid, 13kg calcium dihydrogen phosphate, 4kg first-grade sunflower oil, 2kg premixed feed, 2kg sodium chloride, 1kg intestinal health preparation premix, 1kg five grain acid, 1kg choline chloride, 0.5kg complex enzyme preparation premix, and 0.5kg microbial preparation premix, and granulated for the second time at 60° C., with a granulation particle size of 3.0 mm, and passed through a crusher after cooling, and the crushed material standard is that 100% can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens.

[0027] The amino acid components are as follows: by mass percentage, lysine 43.35%, methionine 19.08%, threonine 13.87%, tryptophan 2.31%, isoleucine 12.72%, and valine 8.67%.

[0028] The components of the premix feed are: by mass percentage, 66.67% of trace element premix and 33.33% of vitamin premix; the components of the trace element premix are: by mass percentage, 3% of iron, 4% of zinc, 0.4% of copper, 5% of manganese, 0.02% of selenium, 0.04% of iodine, and 87.54% of zeolite powder; the components of the vitamin premix are: by mass percentage, 0.93% of vitamin A, 30.03% of vitamin D, 13.4% of vitamin E, 11% of vitamin B1, 2.6% of vitamin B2, 1.9% of vitamin B6, 20% of niacin, 5% of pantothenic acid, 0.5% of folic acid, 0.03% of biotin, and 54.61% of rice husk.

[0029] The components of the intestinal health preparation premix are: by mass percentage, 50% of oregano oil premix and 50% of benzoic acid.

[0030] The components of the composite enzyme preparation premix are as follows: by mass percentage, 8% of xylanase preparation, 2% of β-glucanase preparation, 2% of β-mannanase preparation, 1% of α-galactosidase preparation, 10% of keratinase preparation, 4% of pectinase preparation, 3% of cellulase preparation, and 70% of rice husk carrier; the enzyme activity of the xylanase preparation is ≥3×10 4 U / g, enzyme activity of β-glucanase preparation ≥2×10 3 U / g, enzyme activity of β-mannanase preparation ≥6×10 3 U / g, enzyme activity of α-galactosidase preparation ≥2×10 2 U / g, the enzyme activity of keratinase preparation is ≥1×10 5 U / g, the enzyme activity of pectinase preparation is ≥1×10 3 U / g, cellulase activity ≥8×10 2 U / g.

[0031] The components of the microbial preparation premix are: 10% of Clostridium butyricum, 5% of Lactobacillus acidophilus, 3% of Bacillus subtilis, and 82% of rice husk carrier; the number of live bacteria of Clostridium butyricum is ≥3.0×10 8 CFU / g, the number of viable bacteria of Lactobacillus acidophilus agent ≥1.0×10 8 CFU / g, the number of viable bacteria of Bacillus subtilis inoculant ≥5.0×10 9 CFU / g.

[0032] Example 2

[0033] This embodiment provides the preparation of the compound feed for laying hens.

[0034] 1) 150 kg of enzymatically hydrolyzed cottonseed protein, 543 kg of corn, 100 kg of puffed corn and 60 kg of wheat were crushed separately and passed through a 1.5 mm aperture sieve, mixed and granulated for the first time at 85° C., with a granulation particle size of 4.0 mm, cooled and coarsely crushed, and passed through a 2.5 mm aperture sieve to obtain a semi-finished feed.

[0035] 2) The semi-finished feed is mixed with 47kg soybean meal, 30kg corn protein powder, 19.6kg fine stone powder, 17.3kg amino acid, 14.4kg calcium dihydrogen phosphate, 6kg first-grade sunflower oil, 3kg premixed feed, 2.5kg sodium chloride, 2kg intestinal health preparation premix, 2kg five-grain acid, 1.2kg choline chloride, 1kg complex enzyme preparation premix, and 1kg microbial preparation premix, and granulated for the second time at 60° C., with a granulation particle size of 3.0 mm, and then passed through a crusher after cooling, and the crushed material standard is that 100% can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens (a total of 1000kg).

[0036] The amino acids, premixed feeds, intestinal health preparation premixes, complex enzyme preparation premixes, and microbial preparation premixes used are the same as those in Example 1.

[0037] Example 3

[0038] This embodiment provides the preparation of the compound feed for laying hens.

[0039] 1) 155 kg of enzymatically hydrolyzed cottonseed protein, 550 kg of corn, 105 kg of puffed corn and 65 kg of wheat were crushed separately and passed through a 1.5 mm pore size sieve, and then granulated for the first time at 85° C. after mixing, with a granulation particle size of 4.0 mm, and then coarsely crushed after cooling, and passed through a 2.5 mm pore size sieve to obtain a semi-finished feed.

[0040] 2) The semi-finished feed is mixed with 55kg soybean meal, 35kg corn protein powder, 22kg fine stone powder, 18.5kg amino acid, 14.8kg calcium dihydrogen phosphate, 7kg first-grade sunflower oil, 3.5kg premixed feed, 2.8kg sodium chloride, 2.5kg intestinal health preparation premix, 2.5kg five-grain acid, 1.3kg choline chloride, 1.2kg complex enzyme preparation premix, and 1.3kg microbial preparation premix, and granulated for the second time at 60° C. with a granulation particle size of 3.0 mm. After cooling, the granulated material is passed through a crusher, and the crushed material standard is that 100% can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens.

[0041] The amino acids, premixed feeds, intestinal health preparation premixes, complex enzyme preparation premixes, and microbial preparation premixes used are the same as those in Example 1.

[0042] Example 4

[0043] This embodiment provides the preparation of the compound feed for laying hens.

[0044] 1) 160 kg of enzymatically hydrolyzed cottonseed protein, 550 kg of corn, 110 kg of puffed corn and 70 kg of wheat were crushed separately and passed through a 1.5 mm pore size sieve, mixed and granulated for the first time at 85° C., with a granulation particle size of 4.0 mm, cooled and coarsely crushed, and passed through a 2.5 mm pore size sieve to obtain a semi-finished feed.

[0045] 2) The semi-finished feed is mixed with 60kg soybean meal, 40kg corn protein powder, 25kg fine stone powder, 20kg amino acid, 15kg calcium dihydrogen phosphate, 8kg first-grade sunflower oil, 4kg premixed feed, 3kg sodium chloride, 3kg intestinal health preparation premix, 3kg five-grain acid, 1.5kg choline chloride, 1.5kg complex enzyme preparation premix, and 1.5kg microbial preparation premix, and granulated for the second time at 60° C., with a granulation particle size of 3.0 mm, and passed through a crusher after cooling, and the crushed material standard is that 100% of the crushed material can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens.

[0046] The amino acids, premixed feeds, intestinal health preparation premixes, complex enzyme preparation premixes, and microbial preparation premixes used are the same as those in Example 1.

[0047] Example 5

[0048] This embodiment provides the feeding effect of the compound feed for laying hens.

[0049] Trial period: May 2021 to October 2022.

[0050] Test location: Xinjiang Taikun Group laying hen test field.

[0051] Experimental animals: Hy-Line Brown commercial laying hens.

[0052] Diet design: The experimental group used the egg-laying chicken compound feed provided in Example 2 (preferred embodiment), and the control group used a conventional corn-soybean meal diet. The nutritional standards refer to the "Hyline Brown Traditional Cage System Feeding and Management Manual" (published in 2022). The feed formulas for the experimental and control groups are shown in Table 1.

[0053] Table 1. Feed formula

[0054]

[0055]

[0056] Note: 3.0mm crushing: granulation particle size 3.0mm, after cooling, pass through crusher, crushing material standard is 100% through 8 mesh standard sieve, 16 mesh standard sieve undersize ≤3%; CP represents crude protein. The components of compound enzyme preparation premix 1 used in the test group are the same as those in Example 1; the components of compound enzyme preparation premix 2 used in the control group are: by mass percentage, xylanase preparation 4%, β-glucanase preparation 2%, β-mannanase preparation 2%, α-galactosidase preparation 1%, keratinase preparation 2%, pectinase preparation 2.5%, cellulase preparation 3%, rice husk carrier 83.5%; the enzyme activity of each enzyme preparation is the same as that of the test group.

[0057] Test method: Select 3,600 healthy Hy-Line Brown commercial layer chicks at 1 day old and keep them in the same chicken house. Randomly divide the chicks into 2 groups, with 1,800 chicks in each of the control group and the experimental group. Both the control group and the experimental group are set with 3 replicates, with 600 chicks in each replicate. The whole test process lasts for 72 weeks. The feeding process is divided into 4 stages: brooding stage I (0 - 4 weeks), brooding stage II (5 - 8 weeks), growing stage (9 - 17 weeks), and laying period (18 weeks - 72 weeks).

[0058] During the whole test process, the control group is fed with a conventional corn - soybean meal diet; in the experimental group, the chicks are fed with the compound feed for young laying hens prepared in Example 2 during brooding stage I, and the same diet as the control group is used during brooding stage II, growing stage, and laying period.

[0059] Feeding management: Both the experimental group and the control group have free access to food and water, and the feed is added at fixed times of 8:00, 13:00, and 19:00 every day. During the laying period, eggs are collected at 12:00 noon every day, and all eggs in the house are cleared at 6:00 pm. The temperature of the chicken house is automatically controlled according to the "Hy-Line Brown Traditional Cage Rearing System Feeding Management Manual" (released in 2022). The manure is cleared by the manure scraper every day, the automatic lighting is 16.5 hours per day, and the disinfection and immunization procedures are all carried out according to the aforementioned standards.

[0060] Index determination: Calculate and statistically analyze the body weight at 5 weeks old, cumulative feed intake at 5 weeks old, and tibia length at 5 weeks old; body weight at 12 weeks old and tibia length at 12 weeks old; cumulative egg production at 72 weeks old and cumulative feed intake at 72 weeks old.

[0061] Data statistics: The test data is sorted out using Excel 2010.

[0062] Data analysis: The test data is expressed as mean ± standard deviation. One-way analysis of variance is performed using SPASS software to test the significance of differences between groups, and Duncan's method is used for multiple comparisons between groups. A P value less than 0.05 indicates a significant difference.

[0063] Test results: See Table 2.

[0064] Table 2. Comparison of indexes between the experimental group and the control group

[0065]

[0066]

[0067] Calculated from the data in Table 2, the body weight of the experimental group at 5 weeks old is 8.46% higher than that of the control group, with a significant difference; the body weight at 12 weeks old is 5.66% higher than that of the control group, with a significant difference. The tibia length of the experimental group at 5 weeks old is 1.55% higher than that of the control group; the tibia length at 12 weeks old is 2.05% higher than that of the control group, with a significant difference. The cumulative egg production of the experimental group at 72 weeks old is 3.90% higher than that of the control group, with a significant difference.

[0068] Test conclusion: See Table 3.

[0069] Table 3. Comparison of economic benefits between the experimental group and the control group

[0070]

[0071] Note: In Table 3, profit = cumulative egg production at 72 weeks of age × average egg price - cumulative feed intake at 72 weeks of age × average feed price. The average feed price of both the control group and the experimental group is 2.43 yuan (the reason is that except for the difference in feed during the brooding period, the same feed is used in other stages. During the first stage of brooding (0 - 4 weeks), the feed intake of one chicken is only about 0.6 kg, and the total feed intake during the entire production period is 48 - 49 kg, accounting for a very small proportion of the total feed intake. Although the price of brooding feed per ton differs by 20 yuan, when calculated into the average feed price, it only affects the third decimal place).

[0072] As can be seen from Table 3, compared with the control group, the cumulative egg production of each Hy-Line Brown commercial laying hen in the experimental group increased by 0.8 kg at 72 weeks. Calculated at an average egg price of 9 yuan / kg and after deducting the feeding cost (cumulative feed intake at 72 weeks of age × average feed price), the profit per chicken increased by 4.75 yuan, and the economic benefits are significant.

[0073] In summary, the present invention uses enzymatically hydrolyzed cottonseed protein as the main protein source. Through the optimization of the feed formula, the usage amount of soybean meal in the feed is reduced from the traditional 31.5% to 4.7%, and the reduction rate is more than 85%. On the premise of meeting the growth requirements of young laying hens and ensuring the egg-laying performance during the laying period, the present invention reduces the adverse effects of anti-nutritional components in soybean meal on the intestines of young laying hens, while reducing the dependence on imported soybean raw materials and lowering the feed cost.

[0074] The above embodiments can preferably illustrate the technical solution of the present invention, but only describe the preferred implementation modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various changes and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the present invention.

Claims

1. A compound feed for laying hens, characterized in that: The egg-laying chicken compound feed uses enzymolyzed cottonseed protein as a main protein source, and comprises the following components, by weight: 680-730 parts of energy raw materials, 140-160 parts of enzymolyzed cottonseed protein, 40-60 parts of soybean meal, 20-40 parts of corn protein powder, 15-25 parts of fine stone powder, 15-20 parts of amino acids, 13-15 parts of calcium dihydrogen phosphate, 4-8 parts of first-grade sunflower oil, 2-4 parts of premixed feed, 2-3 parts of sodium chloride, 1-3 parts of intestinal health preparation premix, 1-3 parts of pentose acid, 1-1.5 parts of choline chloride, 0.5-1.5 parts of complex enzyme preparation premix, and 0.5-1.5 parts of microbial preparation premix.

2. The compound feed for laying hens according to claim 1, characterized in that: The energy raw materials include: corn, puffed corn and wheat.

3. The compound feed for laying hens according to claim 1, characterized in that: The free cottonpol content of the enzymatically hydrolyzed cottonseed protein is ≤150ppm, the crude protein is ≥65%, and the total acid is ≥4%.

4. The compound feed for laying hens according to claim 1, characterized in that: The amino acid components are as follows: by mass percentage, lysine 43.35%, methionine 19.08%, threonine 13.87%, tryptophan 2.31%, isoleucine 12.72%, and valine 8.67%.

5. The compound feed for laying hens according to claim 1, characterized in that: The components of the premix feed are: by mass percentage, 66.67% of trace element premix and 33.33% of vitamin premix; The components of the trace element premix are: by mass percentage, 3% iron, 4% zinc, 0.4% copper, 5% manganese, 0.02% selenium, 0.04% iodine, and 87.54% zeolite powder; The components of the vitamin premix are: by mass percentage, vitamin A 0.93%, vitamin D 30.03%, vitamin E 13.4%, vitamin B11%, vitamin B2 2.6%, vitamin B6 1.9%, niacin 20%, pantothenic acid 5%, folic acid 0.5%, biotin 0.03%, and rice husk 54.61%.

6. The compound feed for laying hens according to claim 1, characterized in that: The components of the intestinal health preparation premix are: by mass percentage, 50% of oregano oil premix and 50% of benzoic acid.

7. The compound feed for laying hens according to claim 1, characterized in that: The components of the composite enzyme preparation premix are: by mass percentage, 8% of xylanase preparation, 2% of β-glucanase preparation, 2% of β-mannanase preparation, 1% of α-galactosidase preparation, 10% of keratinase preparation, 4% of pectinase preparation, 3% of cellulase preparation, and 70% of rice husk carrier; The enzyme activity of xylanase preparation is ≥3×10 4 U / g, enzyme activity of β-glucanase preparation ≥2×10 3 U / g, enzyme activity of β-mannanase preparation ≥6×10 3 U / g, enzyme activity of α-galactosidase preparation ≥2×10 2 U / g, the enzyme activity of keratinase preparation is ≥1×10 5 U / g, the enzyme activity of pectinase preparation is ≥1×10 3 U / g, cellulase activity ≥8×10 2 U / g.

8. The compound feed for laying hens according to claim 1, characterized in that: The components of the microbial preparation premix are: 10% of Clostridium butyricum, 5% of Lactobacillus acidophilus, 3% of Bacillus subtilis, and 82% of rice husk carrier; The number of viable bacteria of Clostridium butyricum agent is ≥3.0×10 8 CFU / g, the number of viable bacteria of Lactobacillus acidophilus agent ≥1.0×10 8 CFU / g, the number of viable bacteria of Bacillus subtilis inoculant ≥5.0×10 9 CFU / g.

9. The method for preparing the compound feed for laying hens according to claim 1, characterized in that: include: Enzymatically hydrolyzed cottonseed protein, corn, puffed corn, and wheat are crushed separately and passed through a 1.5 mm aperture sieve, mixed according to the raw material ratio, and granulated for the first time at 85° C., with a granulation particle size of 4.0 mm, and then coarsely crushed after cooling, and passed through a 2.5 mm aperture sieve to obtain a semi-finished feed; The semi-finished feed is mixed with soybean meal, corn protein powder, fine stone powder, amino acid, calcium dihydrogen phosphate, first-grade sunflower oil, premixed feed, sodium chloride, intestinal health preparation premix, five-grain acid, choline chloride, complex enzyme preparation premix, and microbial preparation premix according to the raw material ratio, and granulated for the second time at 60° C. with a granulation particle size of 3.0 mm. After cooling, the granulated material is passed through a crusher, and the crushed material standard is that 100% can pass through an 8-mesh standard sieve and the sieve under the 16-mesh standard sieve is ≤3%, so as to obtain the compound feed for laying hens.

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