Laying hen compound feed for effectively improving eggshell quality of Jingfeng No.8 laying hens in later egg laying period

Abstract

The invention belongs to the technical field of feed products, and particularly relates to a laying hen compound feed capable of effectively improving the eggshell quality of Jingfeng No.8 laying hens in the later egg laying period. The functional nutrition enhancer in the compound feed comprises zinc methionine, selenium yeast, xylooligosaccharide, kadsura coccinea, star anise essential oil, a scutellaria baicalensis extract and mountain flour; the mass ratio of the raw materials is 50: 20: 200: 300: 150: 200: 80. According to the invention, on the basis of researching the nutritional requirements of the Beijing No.8 laying hens in the late egg laying period, the functional nutrition enhancer is added to effectively reduce the occurrence probability of the eggshell quality of soft-shell eggs, sand-shell eggs, broken eggs and the like in the late egg laying period of the Beijing No.8 laying hens, and the breeding loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of feed products, and in particular relates to a compound feed for laying hens which can effectively improve the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period. Background Art

[0002] With the gradual increase in raw material prices and breeding costs, powder-shelled laying hens are a high-yield, high-quality, disease-resistant laying hen breed, and are favored by the majority of breeders. Jingfen laying hens are one of the main powder-shelled laying hens raised in my country since the 1980s. They have the advantages of early laying, high yield, small size, low feed consumption, high feed return, and strong disease resistance. However, with the increase in the age of laying hens and the aging of various digestive organs, egg laying causes nutritional overdraft, the intestinal calcium absorption capacity is weakened, and the calcium and phosphorus in the body are rapidly consumed. The eggshell becomes thinner and the eggshell strength decreases rapidly in the later stage of laying, resulting in the eggshell quality of Jingfen laying hens in the later stage of laying, such as soft shell eggs, sand shell eggs, and broken eggs. Therefore, it is very necessary to develop a compound feed that can effectively improve the eggshell quality of Jingfen laying hens in the later stage of laying.

[0003] The existing technical means to improve eggshell quality, in addition to "breed, laying age, and light" in the laying hen breeding process, often also include feeding granular calcium, or preventing diseases such as infectious bronchitis (IB), Newcastle disease (ND), and egg drop syndrome (EDS) in laying hens, which can seriously affect eggshell quality. Frequent immunization leads to high stress in the flock and large differences in individual immune effects, making it difficult to achieve a satisfactory level. At the same time, the immunization of the flock is labor-intensive. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a functional nutritional enhancer, and prepares it into a laying hen compound feed that effectively improves the eggshell quality of Jingfen No. 8 laying hens in the late laying period, which meets the nutritional needs of Jingfen laying hens in the late laying period while effectively improving the eggshell quality, and has simple operation and obvious effects.

[0005] In order to achieve the above invention object, the specific technical solution of the present invention is:

[0006] A functional nutrition enhancer is used for improving the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period, wherein the functional nutrition enhancer comprises zinc methionine, yeast selenium, oligoxylose, Blue Knight, star anise essential oil, scutellaria baicalensis extract and stone powder; the mass ratio thereof is 50:20:200:300:150:200:80.

[0007] Furthermore, in 100 portions of laying hen compound feed, the dosage of the functional nutrition enhancer is 0.05-0.15.

[0008] Furthermore, the improvement of the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period includes reducing the occurrence rate of soft-shell eggs, sandy-shell eggs and broken eggs in the late egg-laying period.

[0009] The present application also protects a compound feed for laying hens for improving the eggshell quality of Jingfen No. 8 laying hens in the later stage of laying eggs, wherein a functional nutrition enhancer is used in the feed.

[0010] The compound feed contains the following raw materials in parts by weight: 55-70 parts of corn, 15-19 parts of soybean meal, 4-8 parts of corn distillers grains (DDGS), 2-4 parts of cottonseed meal, 1-1.5 parts of soybean oil, 1-10 parts of corn gluten meal, 0.2-0.4 parts of salt, 2.0-5.5 parts of stone powder, 4.0-9.0 parts of stone particles, 0.2-1.0 parts of calcium hydrogen phosphate, 0.1-0.5 parts of baking soda, 0.03-0.12 parts of choline chloride, 0.2-0.4 parts of lysine, 0.05-0.15 parts of methionine, 0.02-0.12 parts of tryptophan, 0.08-0.12 parts of vitamin premix, 0.12-0.20 parts of trace element premix and 0.05-0.15 parts of functional nutrition enhancer.

[0011] Furthermore, the Jingfen No. 8 laying hen compound feed for improving eggshell quality contains the following raw materials in parts by weight: 55-65 parts of corn, 14-17 parts of soybean meal, 4-7 parts of corn alcohol grains, 2-3 parts of cottonseed meal, 1-1.5 parts of soybean oil, 1-10 parts of corn gluten meal, 0.2-0.3 parts of salt, 2.0-5.5 parts of stone powder, 4.0-9.0 parts of stone particles, 0.2-1.0 parts of calcium hydrogen phosphate, 0.1-0.5 parts of baking soda, 0.03-0.12 parts of choline chloride, 0.2-0.4 parts of lysine, 0.05-0.15 parts of methionine, 0.02-0.12 parts of tryptophan, 0.08-0.12 parts of vitamin premix, 0.12-0.20 parts of trace element premix, and 0.05-0.15 parts of functional nutrition enhancer.

[0012] Furthermore, the compound feed contains the following raw materials in parts by weight: 62 parts of corn, 17 parts of soybean meal, 4 parts of corn alcohol grains, 2 parts of cottonseed meal, 1 part of soybean oil, 3.4 parts of corn gluten meal, 0.25 parts of salt, 3.0 parts of stone powder, 6.0 parts of stone particles, 0.35 parts of calcium hydrogen phosphate, 0.1 parts of baking soda, 0.1 parts of choline chloride, 0.28 parts of lysine, 0.09 parts of methionine, 0.08 parts of tryptophan, 0.10 parts of vitamin premix, 0.15 parts of trace element premix, and 0.1 parts of functional nutrition enhancer.

[0013] Furthermore, in the Jingfen No. 8 laying hen compound feed for improving eggshell quality, each kilogram of the vitamin premix contains the following components by weight:

[0014] Vitamin A 6 million IU, Vitamin C 10g, Vitamin D3 2 million IU, Calcium pantothenate 10g, Vitamin E15g, Vitamin B2 3g, Vitamin B1 1.5g, Vitamin B6 2g, Vitamin K3 3g, Complex enzyme 200g, Phytase 30g, Fine rice bran 722g.

[0015] Furthermore, in the Jingfen No. 8 laying hen compound feed for improving eggshell quality, the trace element premix per kilogram includes the following components by weight: 80g of ferrous sulfate monohydrate, 12g of copper sulfate pentahydrate, 50g of zinc sulfate monohydrate, 55g of manganese sulfate monohydrate, 4g of sodium selenite, 8g of potassium iodide, and 741g of stone powder.

[0016] Furthermore, in the Jingfen No. 8 laying hen compound feed for improving eggshell quality, the functional nutrition enhancer includes the following components by weight: 50g of zinc methionine, 20g of yeast selenium, 200g of xylo-oligosaccharides, 300g of Blue Knight, 150g of star anise essential oil, 200g of Scutellaria baicalensis extract, and 80g of stone powder.

[0017] Furthermore, the method for preparing the Jingfen No. 8 laying hen compound feed for improving eggshell quality comprises the following steps:

[0018] (1) Preparation of functional sexual nutrition enhancer: weigh the raw materials of each component according to the following weight, grind the scutellaria baicalensis extract into ultrafine powder, mix them evenly in a micro mixer, and set aside;

[0019] (2) Preparation of vitamin premix: Weigh the raw materials of each component according to the following weight, mix the components in a mixer for 150-200 seconds, mix well, and set aside;

[0020] (3) Prepare the trace element premix. Weigh the raw materials of each component according to the following weight, mix the components in a mixer for 150-200 seconds, mix well, and set aside;

[0021] (4) Preparation of compound feed for laying hens: Weigh the raw materials of each component according to the required weight, crush the corn and cottonseed meal in the component, and then mix the crushed raw materials with other raw materials in a mixer for 150-200 seconds. Mix them evenly and pack them into bags.

[0022] In the present invention, the added corn, DDGS and corn gluten powder are rich in lutein and have the effect of improving the color of eggshell and yolk. Appropriately increasing the soybean oil in the compound feed is helpful to promote the absorption efficiency of fat-soluble vitamins, the combined effect of stone powder + stone particles is conducive to sustained and stable calcium absorption and eggshell calcium deposition, and the addition of baking soda is helpful to maintain the intestinal electrolyte balance of laying hens and relieve environmental stress.

[0023] The combined use of zinc sulfate monohydrate and zinc methionine can increase the egg production rate of laying hens, reduce the feed-egg ratio, effectively improve the eggshell quality, and increase the eggshell thickness. Adding yeast selenium to feed can improve the production performance of laying hens in the late egg-laying period, eggshell strength, and yolk selenium content, and improve the body's antioxidant properties and cholesterol metabolism ability.

[0024] Oligosaccharides can selectively promote the proliferation activity of intestinal bifidobacteria, promote the reproduction of beneficial bacteria in the animal digestive tract, inhibit the growth of harmful bacteria, improve the balance of microbial flora; enhance animal disease resistance, reduce morbidity, and improve the prevention and treatment of animal diseases. Blue Knight is rich in glucose oxidase, Clostridium butyricum, and Enterococcus faecium. It can regulate the balance of intestinal flora, promote the growth and reproduction of beneficial intestinal bacteria, inhibit the proliferation of harmful bacteria, effectively prevent the occurrence of intestinal diseases such as diarrhea, dysentery, and bacterial enteritis, and enhance the body's immunity and disease resistance; maintain the normal morphology of intestinal mucosal epithelial cells, provide energy for intestinal epithelial cells, promote digestion and absorption of the small intestine, and repair damaged intestinal mucosa; decompose anti-nutritional factors, protect intestinal health, improve feed conversion rate, and promote growth.

[0025] Plant essential oils can significantly increase poultry feed intake, egg production rate, body weight and feed conversion rate, and have significant optimization effects on egg weight, yolk ratio, Haff unit and other egg quality. In addition, star anise essential oil also has a significant improvement effect on eggshell thickness and yolk color of laying hens. Scutellaria baicalensis and its active ingredients have a wide range of pharmacological effects, such as anti-inflammatory, antioxidant, anti-tumor and immunomodulatory, especially anti-bacterial / fungal effects. Therefore, adding Scutellaria baicalensis extract can effectively prevent salpingitis in laying hens and significantly improve eggshell quality in the late egg production period.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. The present invention studies the conventional nutritional indicators, trace elements and vitamin requirements of Jingfen laying hens in the late egg-laying period, and the resulting compound feed preparation technology is more scientific and more comprehensive;

[0028] 2. The invention is more conducive to the promotion and use of the invention by using a complete compound feed;

[0029] 3. Use zinc sulfate monohydrate and zinc methionine, sodium selenite and yeast selenium to improve the utilization rate of mineral elements;

[0030] 4. Use functional nutrition enhancers to effectively prevent the occurrence of salpingitis, maintain the balance of intestinal flora, promote calcium absorption, avoid the rapid decline of eggshell quality in the late egg-laying period, and reduce breeding losses;

[0031] 5. Use xylo-oligosaccharides, star anise essential oil and scutellaria extract to improve the digestive flora balance and feed conversion efficiency of Beijing white laying hens in the late egg-laying period, making the product more targeted.

[0032] 6. The compound feed of the present invention not only meets the nutritional needs of Jingfen laying hens, but also adds functional nutritional enhancers to improve eggshell quality, thereby increasing the prevention rate by 60-70%, and increases the use of oligoxylose and plant essential oils to improve the disease resistance of laying hens.

[0033] 7. The present invention summarizes the research results of predecessors, summarizes and studies the nutritional requirements of Jingfen laying hens, and formulates a complete compound feed.

[0034] 8. The use of the feed of the present invention can refer to the breeding procedures of Jingfen laying hens provided by various breeding companies, and the laying hens can be fed as needed and allowed to eat freely during the late egg-laying period.

[0035] 9. The formula of the present invention is very convenient to use and is conducive to large-scale promotion. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0037] The raw materials used in this application are all commercially available products.

[0038] In the following embodiments, 1 part by weight of the vitamins contains the following components by weight: 6 million IU of vitamin A, 10 g of vitamin C, 2 million IU of vitamin D3, 10 g of calcium pantothenate, 15 g of vitamin E, 3 g of vitamin B2, 1.5 g of vitamin B1, 2 g of vitamin B6, 3 g of vitamin K3, 200 g of complex enzyme, 30 g of phytase, and 722 g of fine rice bran.

[0039] 1 part by weight of the trace element premix comprises the following components by weight: 80 g of ferrous sulfate monohydrate, 12 g of cupric sulfate pentahydrate, 50 g of zinc sulfate monohydrate, 55 g of manganese sulfate monohydrate, 4 g of sodium selenite, 8 g of potassium iodide and 741 g of stone powder.

[0040] 1 part by weight of the functional nutrition enhancer includes the following components by weight: 50 g of zinc methionine, 20 g of yeast selenium, 200 g of xylo-oligosaccharide, 300 g of Blue Knight, 150 g of star anise essential oil, 200 g of scutellaria baicalensis extract, and 80 g of stone powder.

[0041] Example 1

[0042] A compound feed for laying hens that effectively improves the eggshell quality of Jingfen laying hens in the late egg-laying period contains the following raw materials in parts by weight (each part by weight is regarded as 1 kg, the same below):

[0043] 61 parts of corn, 16 parts of soybean meal, 5 parts of corn distillers grains (DDGS), 3 parts of cottonseed meal, 3.4 parts of corn gluten meal, 1 part of soybean oil, 0.25 parts of salt, 3.0 parts of stone powder, 6.0 parts of stone particles, 0.35 parts of calcium hydrogen phosphate, 0.1 parts of baking soda, 0.1 parts of choline chloride, 0.28 parts of lysine, 0.09 parts of methionine, 0.08 parts of tryptophan, 0.10 parts of vitamin premix, 0.15 parts of trace element premix, and 0.1 parts of functional nutrition enhancer.

[0044] The added corn, DDGS, and corn gluten powder are rich in lutein and have the effect of improving the color of eggshells. Properly increasing the whole-fat rice bran in the compound feed can help promote the absorption efficiency of fat-soluble vitamins. The combined effect of stone powder + stone particles is conducive to sustained and stable calcium absorption and eggshell calcium deposition. The addition of baking soda helps maintain the intestinal electrolyte balance of laying hens and relieve environmental stress.

[0045] The preparation method is specifically as follows:

[0046] (1) Preparation of functional nutrition enhancer: weigh the raw materials of each component according to the following weight, grind the scutellaria baicalensis extract into ultrafine powder, mix them evenly in a micro mixer, and set aside;

[0047] 50g methionine zinc, 20g yeast selenium, 200g xylo-oligosaccharide, 300g Blue Knight, 150g star anise essential oil, 200g scutellaria extract, 80g stone powder.

[0048] (2) Preparation of vitamin premix: weigh the raw materials of each component according to the following weight, mix the components in a mixer for 180 seconds, mix well, and set aside;

[0049] Vitamin A 6 million IU, Vitamin C 10g, Vitamin D3 2 million IU, Calcium pantothenate 10g, Vitamin E15g, Vitamin B2 3g, Vitamin B1 1.5g, Vitamin B6 2g, Vitamin K3 3g, Complex enzyme 200g, Phytase 30g, Fine rice bran 722g.

[0050] (3) Prepare the trace element premix. Weigh the raw materials of each component according to the following weight, mix the components in a mixer for 180 seconds until they are evenly mixed and set aside;

[0051] 80g ferrous sulfate monohydrate, 12g copper sulfate pentahydrate, 50g zinc sulfate monohydrate, 55g manganese sulfate monohydrate, 4g sodium selenite, 8g potassium iodide, 741g stone powder.

[0052] (4) Preparation of compound feed for laying hens: Weigh the raw materials of each component according to the required weight, crush the corn and cottonseed meal in the component, and then mix the crushed raw materials with other raw materials in a mixer for 150-200 seconds. Mix them evenly and pack them into bags.

[0053] Example 2

[0054] Other contents are the same as in Example 1. The compound feed for laying hens for improving eggshell quality contains the following raw materials in parts by weight:

[0055] 60 parts of corn, 16.8 parts of soybean meal, 4 parts of corn distillers grains (DDGS), 2 parts of cottonseed meal, 1.2 parts of soybean oil, 5.5 parts of corn gluten meal, 0.25 parts of salt, 3.0 parts of stone powder, 6.0 parts of stone particles, 0.32 parts of calcium hydrogen phosphate, 0.1 parts of baking soda, 0.1 parts of choline chloride, 0.26 parts of lysine, 0.08 parts of methionine, 0.02 parts of tryptophan, 0.10 parts of vitamin premix, 0.15 parts of trace element premix, and 0.12 parts of functional nutrition enhancer.

[0056] The content and preparation of each component of the vitamin premix, trace element premix, and functional nutrition enhancer are the same as those in Example 1.

[0057] Example 3

[0058] Other contents are the same as in Example 1. The compound feed for laying hens for improving eggshell quality contains the following raw materials in parts by weight:

[0059] 61 parts of corn, 16 parts of soybean meal, 5 parts of corn distillers grains (DDGS), 3 parts of cottonseed meal, 1.6 parts of corn gluten meal, 1.4 parts of soybean oil, 0.25 parts of salt, 3.2 parts of stone powder, 7.0 parts of stone particles, 0.45 parts of calcium hydrogen phosphate, 0.1 parts of baking soda, 0.1 parts of choline chloride, 0.3 parts of lysine, 0.12 parts of methionine, 0.08 parts of tryptophan, 0.12 parts of vitamin premix, 0.2 parts of trace element premix, and 0.08 parts of functional nutrition enhancer.

[0060] The content and preparation of each component of the vitamin premix, trace element premix, and functional nutrition enhancer are the same as those in Example 1.

[0061] Physical and chemical indicators

[0062] According to laboratory testing, the nutritional indicators of the compound feed of the present invention can reach: crude protein 15.5%, crude fat 4.52%, crude fiber 2.21%, crude ash 14.8%, laying hen digestible energy 2620Kcal / Kg, calcium 3.25%, available phosphorus 0.2%, lysine 0.64%, and methionine 0.32%.

[0063] Verification test

[0064] Conducting empirical trials on compound feed Jingfen laying hens at the company’s testing ground.

[0065] (1) Experimental grouping: 9,600 64-week-old laying hens were randomly divided into five treatments.

[0066] Each treatment had 4 replicates, and each replicate had 60 laying hens (240 laying hens / treatment).

[0067] Control group 1 was fed a diet without functional nutrient enhancers, and the nutrient enhancers were replaced with stone powder in equal proportions;

[0068] Control group 2 was a functional nutrition enhancer in which oligoxylose and Blue Knight were not added, and stone powder was used instead in equal proportions;

[0069] Control group 3 was a functional nutrition enhancer in which star anise essential oil and scutellaria baicalensis extract were not added and stone powder was used instead in equal proportions;

[0070] Experimental group 1 was fed with the Zhongjingfen laying hen compound feed of the present invention;

[0071] Experimental group 2 is a layer feed sold by HF, a major company in the market. Its main ingredients are as follows:

[0072] Corn, soybean meal, corn alcohol grains, cottonseed meal, salt, stone powder, calcium hydrogen phosphate, choline chloride, lysine, methionine, vitamin premix, trace element premix, enzyme preparation.

[0073] According to laboratory testing, the nutritional indicators of the laying hen feed can reach: crude protein 15.3%, crude fat 4.55%, crude fiber 2.63%, crude ash 12.41%, laying hen digestible energy 2623Kcal / Kg, calcium 3.75%, available phosphorus 0.24%, lysine 0.63%, and methionine 0.30%.

[0074] (2) Feeding and management: The experiment used 4-layer stepped metal cages, with 5 chickens in each cage. The batch of laying hens was eliminated during the trial period. The chicken houses all adopted a feeding method with longitudinal ventilation, free drinking water, and free access to food. Strictly follow the feeding regulations of the Jingfen laying hen breed, and record the number of eggs laid, egg weight, number of broken soft sandy shell eggs, and number of dead chickens every day. Record the temperature of the chicken house at 6:00, 10:00, 15:00, and 20:00 every day. Record the daily feed input and total feed consumption.

[0075] Eggs were collected continuously in the 4th, 8th, 10th and 12th weeks of the experiment, with 30 eggs in each treatment, for egg quality testing. The test indicators included: egg weight, eggshell strength, eggshell thickness, eggshell weight, egg shape index, yolk color, egg white height, and Haugh unit.

[0076] (3) Data statistical analysis: After simple processing of the original data in Excel, SPSS software was used for variance analysis and significance test. The significance level was P < 0.05, and the extremely significant level was P < 0.01.

[0077] The statistical analysis of the test data of each group is shown in the following table:

[0078] project Control group 1 Control group 2 Control group 3 Experimental Group 1 Experimental Group 2 Egg production rate 80.16 82.90 83.36 84.30 81.28 Egg breaking rate 1.66 2.17 1.99 1.54 1.69 Eggshell strength 4.08 4.25 4.11 4.21 4.03 Egg weight 64.37 64.44 64.7 64.89 64.11 Protein Height 6.9 6.72 6.91 7.02 6.7 Yolk color 11.83 12.31 12.68 12.6 11.67 Haff Unit 81.31 80.14 81.17 82.08 80.01 .

[0079] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. A person skilled in the art will understand that many changes, modifications and even equivalent changes may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. Application of a functional nutrition enhancer in improving the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period, characterized in that: The functional nutrition enhancer comprises zinc methionine, yeast selenium, oligoxylose, Blue Knight, star anise essential oil, scutellaria baicalensis extract and stone powder; the mass ratio thereof is 50:20:200:300:150:200:

80.

2. The use of a functional nutrition enhancer according to claim 1 in improving the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period, characterized in that: In 100 portions of laying hen compound feed, the dosage of the functional nutrition enhancer is 0.05-0.

15.

3. Use of a functional nutrition enhancer according to claim 1 or 2 in improving the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period, characterized in that: The improvement of the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period includes reducing the occurrence probability of soft-shell eggs, sandy-shell eggs and broken eggs in the late egg-laying period.

4. A compound feed for laying hens for improving the eggshell quality of Jingfen No. 8 laying hens in the late egg-laying period, characterized in that: The compound feed contains the following raw materials in parts by weight: 55-70 parts of corn, 15-19 parts of soybean meal, 4-8 parts of corn alcohol grains, 2-4 parts of cottonseed meal, 1-1.5 parts of soybean oil, 1-10 parts of corn gluten meal, 0.2-0.4 parts of salt, 2.0-5.5 parts of stone powder, 4.0-9.0 parts of stone particles, 0.2-1.0 parts of calcium hydrogen phosphate, 0.1-0.5 parts of baking soda, 0.03-0.12 parts of choline chloride, 0.2-0.4 parts of lysine, 0.05-0.15 parts of methionine, 0.02-0.12 parts of tryptophan, 0.08-0.12 parts of vitamin premix, 0.12-0.20 parts of trace element premix and 0.05-0.15 parts of functional nutrition enhancer.

5. The Jingfen No. 8 laying hen compound feed for improving eggshell quality as claimed in claim 4, characterized in that: The compound feed contains the following raw materials in parts by weight: 55-65 parts of corn, 14-17 parts of soybean meal, 4-7 parts of corn alcohol grains, 2-3 parts of cottonseed meal, 1-1.5 parts of soybean oil, 1-10 parts of corn gluten powder, 0.2-0.3 parts of salt, 2.0-5.5 parts of stone powder, 4.0-9.0 parts of stone particles, 0.2-1.0 parts of calcium hydrogen phosphate, 0.1-0.5 parts of baking soda, 0.03-0.12 parts of choline chloride, 0.2-0.4 parts of lysine, 0.05-0.15 parts of methionine, 0.02-0.12 parts of tryptophan, 0.08-0.12 parts of vitamin premix, 0.12-0.20 parts of trace element premix and 0.05-0.15 parts of functional nutrition enhancer.

6. The Jingfen No. 8 laying hen compound feed for improving eggshell quality as claimed in claim 4, characterized in that: The compound feed contains the following raw materials in parts by weight: 62 parts of corn, 17 parts of soybean meal, 4 parts of corn alcohol grains, 2 parts of cottonseed meal, 1 part of soybean oil, 3.4 parts of corn gluten meal, 0.25 parts of salt, 3.0 parts of stone powder, 6.0 parts of stone particles, 0.35 parts of calcium hydrogen phosphate, 0.1 parts of baking soda, 0.1 parts of choline chloride, 0.28 parts of lysine, 0.09 parts of methionine, 0.08 parts of tryptophan, 0.10 parts of vitamin premix, 0.15 parts of trace element premix and 0.1 parts of functional nutrition enhancer.

7. A Jingfen No. 8 laying hen compound feed for improving eggshell quality according to any one of claims 4 to 6, characterized in that: The vitamin premix contains the following components by weight per kilogram: Vitamin A 6 million IU, Vitamin C 10g, Vitamin D3 2 million IU, Calcium pantothenate 10g, Vitamin E15g, Vitamin B2 3g, Vitamin B1 1.5g, Vitamin B6 2g, Vitamin K3 3g, Complex enzyme 200g, Phytase 30g, Fine rice bran 722g.

8. A Jingfen No. 8 laying hen compound feed for improving eggshell quality according to any one of claims 4 to 6, characterized in that: Each kilogram of the trace element premix comprises the following components by weight: 80 g of ferrous sulfate monohydrate, 12 g of copper sulfate pentahydrate, 50 g of zinc sulfate monohydrate, 55 g of manganese sulfate monohydrate, 4 g of sodium selenite, 8 g of potassium iodide, and 741 g of stone powder.

9. A Jingfen No. 8 laying hen compound feed for improving eggshell quality according to any one of claims 4 to 6, characterized in that: The functional nutrition enhancer comprises the following components by weight: 50g of zinc methionine, 20g of yeast selenium, 200g of oligoxylose, 300g of Blue Knight, 150g of star anise essential oil, 200g of scutellaria baicalensis extract, and 80g of stone powder.

10. A method for preparing a Jingfen No. 8 laying hen compound feed for improving eggshell quality according to any one of claims 4 to 6, characterized in that The following steps are involved: (1) Preparation of functional sexual nutrition enhancer: weigh the raw materials of each component according to the proportion, grind the scutellaria baicalensis extract by ultrafine grinding, mix them evenly in a micro mixer, and set aside; (2) Preparing a vitamin premix: Weigh the raw materials of each component according to the proportion, mix the components in a mixer for 150-200 seconds, mix well, and set aside; (3) Preparing the trace element premix: weigh the raw materials of each component according to the proportion, mix the components in a mixer for 150-200 seconds, mix them evenly, and set aside; (4) Preparation of compound feed for laying hens: Weigh the raw materials of each component according to the proportion, crush the corn and cottonseed meal in the component, and then mix the crushed raw materials with other raw materials in a mixer for 150-200 seconds, mix them evenly, and package them into bags.