A laying hen breeding method for extending egg-laying cycle

Abstract

The present invention provides a laying hen breeding method for extending the egg-laying cycle, which includes the steps of equipment installation, chicken house preparation, chicken breed selection, brooding stage, group transfer management and laying period management. Stacked chicken cages are built and automatic equipment is installed to clean and disinfect the chicken houses. Healthy chicks are selected, and the temperature, humidity, light and different feeds are controlled during brooding. Poor chickens are eliminated before group transfer, and anti-stress drugs are added after group transfer. During the laying period, the stocking density, temperature and humidity are controlled, and nutritional fortification feed is supplemented and gonad activity is promoted through light stimulation. Starter feed, early feed, late feed, anti-stress drugs and nutritional fortification feed all have specific formulas. Light stimulation is divided into three stages, and different colors of light are irradiated alternately with different intensities. This method provides a good growth environment and nutrition for laying hens from many aspects, helps to improve the egg production rate of laying hens, extend the egg-laying cycle, and has high practical application value.

Description

Technical Field

[0001] The present invention relates to the technical field of laying hen breeding, and in particular to a laying hen breeding method for extending the egg-laying cycle. Background Art

[0002] Layer farming is an important component of animal husbandry. With the improvement of people's living standards and the pursuit of healthier foods, egg quality has attracted increasing attention. However, traditional layer farming methods have some shortcomings, such as short egg-laying cycles, unstable eggshell quality, and low feed conversion rates. These issues have limited the sustainable development and economic benefits of the layer farming industry.

[0003] First, in traditional farming methods, laying hens typically have a short egg-laying cycle, generally no more than a year. This requires farmers to frequently replace flocks, increasing farming costs. Second, eggshell quality is one of the most important indicators of egg quality, but traditional farming methods lack precise control over eggshell strength, thickness, color, and gloss, resulting in eggs that are easily damaged during transportation and storage, affecting sales. Furthermore, feed conversion rate is a key indicator of farming efficiency. Traditional farming methods often suffer from feed waste and low conversion rates, which not only increases farming costs but also compromises environmental protection and the sustainable use of resources. Summary of the Invention

[0004] In view of this, the present invention proposes a laying hen breeding method for extending the egg-laying cycle to solve the above problems.

[0005] The technical solution of the present invention is achieved as follows: A laying hen breeding method for extending the egg-laying cycle comprises the following steps:

[0006] S1. Equipment installation: Build 4-8 stacked chicken cages with a breeding capacity of 30-60 chickens / m 2 , install automatic feeding, drinking water, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment;

[0007] S2. Chicken house preparation: Thoroughly clean and disinfect the chicken house; ensure that the chicken house environment is clean, sanitary and suitable for growth;

[0008] S3. Select the chicken breed: Select healthy chicks. Check the chicks' feathers and select those with neat and shiny feathers. Check the chicks' anus and select those with a clean area around the anus and no feces. Feel the chicks' abdomens and select those with soft abdomens and no lumps.

[0009] S4, Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1-3 days old, the temperature of the brooding house is maintained at 33-35℃, and then reduced by 2-3℃ every week until it drops to 18-22℃. The relative humidity is 60-70%, the light intensity is 22-24h, and the light intensity is 20-25Lux. Feed the starter feed with a daily feeding amount of 18-22% of the chick weight. From 10-14 days old, the light intensity is 16-20h, and the light intensity is 15-20Lux. Transition from starter feed to early feed with a daily feeding amount of 10-25% of the chick weight. From 28-35 days old, the light intensity is 12-15h, and the light intensity is 10-15Lux. Transition from early feed to late chick feed with a daily feeding amount of 25-35% of the chick weight to complete the brooding stage;

[0010] S5. Transfer management: Select brooding chickens and eliminate sick, disabled, and poorly growing chickens. Fast the chickens before transfer to reduce adverse operational stress. Transfer them to laying cages. Add anti-stress drugs to drinking water 3-5 days after transfer, with a mass-to-volume ratio of 1.2-4.5 mg / mL to drinking water: 100;

[0011] S6. Management during laying period: After transferring to the laying hen house, the stocking density is 5-8 chickens / m 2 , adjust the temperature of the chicken house to 18-25℃, maintain the humidity at 50-70%, add nutritional fortification feed in the early stage of egg production, promote the gonad activity of laying hens through light stimulation, and collect eggs until the late stage of egg production.

[0012] Furthermore, the oxygen content in the air quality of the chicken house in S2 is maintained at 20-23%, the carbon dioxide concentration is below 3500ppm, and the ammonia concentration is less than 20ppm.

[0013] Furthermore, the starter material in S4 includes the following raw materials in parts by weight: 30-50 parts of soybean meal, 12-22 parts of fish meal, 8-12 parts of blood meal, 0.1-0.5 parts of methionine, 0.8-1.2 parts of lysine, 0.3-0.5 parts of vitamin A, 0.2-0.4 parts of B vitamins, and 0.1-0.3 parts of yeast.

[0014] Furthermore, the preliminary material in S4 includes the following raw materials in parts by weight: 50-80 parts of soybean meal, 20-30 parts of fish meal, 8-12 parts of blood meal, 10-15 parts of barley flour, 0.1-0.5 parts of methionine, 0.8-1.2 parts of lysine, 0.3-0.5 parts of vitamin A, 0.2-0.4 parts of B vitamins, 0.1-0.3 parts of yeast, 0.2-0.4 parts of protease, and 0.1-0.3 parts of lipase.

[0015] Furthermore, the late-stage material in S4 includes the following raw materials in parts by weight: 32-45 parts of corn flour, 12-32 parts of millet flour, 5-12 parts of bone meal, 13-26 parts of blood meal, 22-24 parts of shell powder, 3-5 parts of lutein, 2-4 parts of soybean lecithin, 1-3 parts of glycerin, 3-5 parts of avocado oil, 5-10 parts of folic acid, 0.2-1.3 parts of biotin, and 1.3-2.4 parts of spirulina powder.

[0016] Furthermore, the anti-stress drug of S5 comprises the following raw materials in parts by weight: 25-55 parts of vitamin C, 35-65 parts of vitamin E, 12-45 parts of vitamin B6, 10-30 parts of vitamin B12, 12-35 parts of yeast chromium, 8-15 parts of fumaric acid, 22-35 parts of gamma-aminobutyric acid, and 12-30 parts of glutamine.

[0017] Furthermore, the nutritional fortification material of S6 is astaxanthin, canthaxanthin and allicin in a mass ratio of (25-35):(12-22):(8-10).

[0018] Furthermore, the supplementary amount of the nutritional fortification material of S6 is 3.5-5.5% of the mass of the late feed.

[0019] Furthermore, the light stimulation of S6 is divided into three stages. The first stage: alternating irradiation of red light and yellow light, red light irradiation for 20-40 minutes, then switching to yellow light irradiation for 20-40 minutes, and continuing alternating for 14-16 hours; the second stage: alternating irradiation of blue light and white light, blue light irradiation for 45-55 minutes, switching to white light irradiation for 15-35 minutes, and continuing alternating for 20-30 hours; the third stage: alternating irradiation of yellow light and white light, yellow light irradiation for 15-45 minutes, then switching to white light for 30-50 minutes, and continuing for 12-18 hours.

[0020] Furthermore, the S6 red light intensity is 10-30 Lux, the yellow light intensity is 15-35 Lux, the blue light intensity is 5-20 Lux, and the white light intensity is 15-30 Lux.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Providing an excellent breeding environment: Building multi-layer stacked chicken cages and installing automatic equipment improves breeding efficiency and reduces labor costs. At the same time, it ensures timely supply of feed and water, efficient feces cleaning and egg collection, and provides a stable and comfortable living environment for laying hens. Clean and disinfect the chicken houses to ensure sanitary conditions and effectively reduce the risk of laying hens getting sick. Control the air quality in the chicken houses to keep the oxygen content, carbon dioxide, and ammonia concentrations within an appropriate range, providing a good air environment for the growth of laying hens and helping to improve the health and production performance of laying hens.

[0023] (2) Optimize brooding management: Accurately control temperature, humidity, and light intensity, adjust light duration and intensity according to the different ages of the chicks, and rationally transition feeds at different stages to meet the growth and development needs of the chicks. The scientific formula of starter feed, early feed, and late feed provides comprehensive nutrition for the chicks, promotes their growth and development, and improves their survival rate and growth rate.

[0024] (3) Improve the health of chickens: Before transferring, select brooding chickens and eliminate sick, disabled, and poorly growing chickens to improve the overall quality of the flock. Fast the chickens before transferring to reduce stress during the transfer process. Add anti-stress drugs to drinking water to effectively relieve the stress of the chickens during the transfer process, improve the chickens' adaptability, enhance the chickens' immunity and resistance, and reduce the occurrence of diseases.

[0025] (4) Prolonging the egg-laying cycle: Reasonably control the stocking density, temperature and humidity, and provide a suitable egg-laying environment for laying hens by adding specific nutrients to the feed. The combination of astaxanthin, cantharidin and allicin helps to improve the immunity, antioxidant capacity and reproductive system function of laying hens, thereby prolonging the egg-laying cycle. Phased light stimulation promotes the gonad activity of laying hens. Through the alternating irradiation of different colors of light and specific light intensity and time, the physiological rhythm of laying hens is regulated, the egg production rate is increased, the egg-laying cycle of laying hens is effectively extended, and the egg-laying performance and economic value of laying hens are improved. DETAILED DESCRIPTION

[0026] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.

[0027] Unless otherwise specified, the experimental methods used in the examples of the present invention are all conventional methods.

[0028] Unless otherwise specified, the materials, reagents, etc. used in the examples of the present invention can be obtained from commercial sources.

[0029] Example 1

[0030] A laying hen breeding method for extending the egg-laying cycle comprises the following steps:

[0031] S1. Equipment installation: Build a 4-layer stacked chicken cage with a breeding capacity of 30 chickens / m 2 , install automatic feeding, drinking water, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment;

[0032] S2. Chicken house preparation: Thoroughly clean and disinfect the chicken house. Maintain the oxygen content in the air quality of the chicken house at 20%, the carbon dioxide concentration below 3500ppm, and the ammonia concentration below 20ppm to ensure a clean and sanitary environment and a suitable growth environment for the chickens.

[0033] S3. Select the chicken breed: Select healthy chicks. Check the chicks' feathers and select those with neat and shiny feathers. Check the chicks' anus and select those with a clean area around the anus and no feces. Feel the chicks' abdomens and select those with soft abdomens and no lumps.

[0034] S4, Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1-3 days of age, the temperature of the brooding house is maintained at 33°C, and then reduced by 2°C each week until it drops to 18°C. The relative humidity is 60%, the light intensity is 22 hours, and the light intensity is 20 Lux. Feed the chicks a starter feed with a daily feed amount of 18% of the chick weight. The starter feed includes the following ingredients by weight: 30 parts soybean meal, 12 parts fish meal, 8 parts blood meal, 0.1 part methionine, 0.8 part lysine, 0.3 part vitamin A, 0.2 part B vitamins, and 0.1 part yeast.

[0035] From 10-14 days of age, light intensity is 15 Lux for 16 hours, and the chicks are transitioned from starter feed to early feed. The daily feeding amount is 10% of the chick weight. The early feed includes the following raw materials by weight: 50 parts of soybean meal, 20 parts of fish meal, 8 parts of blood meal, 10 parts of barley meal, 0.1 parts of methionine, 0.8 parts of lysine, 0.3 parts of vitamin A, 0.2 parts of B vitamins, 0.1 parts of yeast, 0.2 parts of protease, and 0.1 parts of lipase.

[0036] From 28-35 days of age, light is applied for 12 hours at a light intensity of 10 Lux. The chicks are then transitioned from the early feed to the late feed, with a daily feeding amount of 25% of the chick weight, to complete the brooding stage. The late feed includes the following ingredients by weight: 32 parts corn flour, 12 parts millet flour, 5 parts bone meal, 13 parts blood meal, 22 parts shell powder, 3 parts lutein, 2 parts soybean lecithin, 1 part glycerin, 3 parts avocado oil, 5 parts folic acid, 0.2 parts biotin, and 1.3 parts spirulina powder.

[0037] S5. Transfer management: Select brooding chickens and eliminate sick, disabled, and poorly growing chickens. Fast the chickens before transfer to reduce adverse operational stress. Transfer them to laying cages. Three days after transfer, add anti-stress drugs to the drinking water at a mass-to-volume ratio of 1.2:100 mg / mL. The anti-stress drugs include the following ingredients in parts by weight: 25 parts vitamin C, 35 parts vitamin E, 12 parts vitamin B6, 10 parts vitamin B12, 12 parts yeast chromium, 8 parts fumaric acid, 22 parts gamma-aminobutyric acid, and 12 parts glutamine.

[0038] S6. Management during laying period: After transferring to the laying hen house, the stocking density is 5 chickens / m 2Adjust the temperature of the chicken house to 18°C ​​and the humidity to 50%. Supplement nutritional fortification feed at the beginning of egg production. The supplement amount is 3.5% of the weight of the late-stage feed. The nutritional fortification feed is astaxanthin, cantharidin and allicin with a mass ratio of 25:12:8. Promote the gonadal activity of laying hens through light stimulation until the late stage of egg production, and then collect eggs.

[0039] Light stimulation is divided into three stages. The first stage: alternating red and yellow light irradiation, red light irradiation for 20 minutes, then yellow light irradiation for 20 minutes, and the alternation continues for 14 hours; the second stage: alternating blue and white light irradiation, blue light irradiation for 45 minutes, then switching to white light irradiation for 15 minutes, and the alternation continues for 20 hours; the third stage: alternating yellow and white light irradiation, yellow light irradiation for 15 minutes, then switching to white light for 30 minutes, and the duration is 12 hours; the above-mentioned S6 red light intensity is 10 Lux, yellow light intensity is 15 Lux, blue light intensity is 5 Lux, and white light intensity is 15 Lux.

[0040] Example 2

[0041] A laying hen breeding method for extending the egg-laying cycle comprises the following steps:

[0042] S1. Equipment installation: Build 8-layer stacked chicken cages with a breeding capacity of 60 chickens / m 2 , install automatic feeding, drinking water, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment;

[0043] S2. Chicken house preparation: Thoroughly clean and disinfect the chicken house. Maintain the oxygen content in the air quality of the chicken house at 23%, the carbon dioxide concentration below 3500ppm, and the ammonia concentration below 20ppm to ensure a clean and sanitary environment and a suitable growth environment for the chickens.

[0044] S3. Select the chicken breed: Select healthy chicks. Check the chicks' feathers and select those with neat and shiny feathers. Check the chicks' anus and select those with a clean area around the anus and no feces. Feel the chicks' abdomens and select those with soft abdomens and no lumps.

[0045] S4, Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1-3 days of age, the temperature of the brooding house is maintained at 35°C, and then reduced by 3°C every week until it drops to 22°C. The relative humidity is 70%, and the light intensity is 24 hours a day with 25 Lux. Feed the chicks a starter feed with a daily feed amount of 22% of the chick weight. The starter feed includes the following ingredients by weight: 50 parts soybean meal, 22 parts fish meal, 12 parts blood meal, 0.5 parts methionine, 1.2 parts lysine, 0.5 parts vitamin A, 0.4 parts B vitamins, and 0.3 parts yeast.

[0046] From 10-14 days of age, light is applied for 20 hours at a light intensity of 20 Lux. The chicks are transitioned from starter feed to early feed. The daily feeding amount is 25% of the chick weight. The early feed includes the following ingredients by weight: 80 parts of soybean meal, 30 parts of fish meal, 12 parts of blood meal, 15 parts of barley flour, 0.5 parts of methionine, 1.2 parts of lysine, 0.5 parts of vitamin A, 0.4 parts of B vitamins, 0.3 parts of yeast, 0.4 parts of protease, and 0.3 parts of lipase.

[0047] From 28-35 days of age, light intensity is 15 lux for 15 hours, and the chicks are transitioned from the early feed to the late feed, with a daily feeding amount of 35% of the chick weight to complete the brooding stage; the late feed includes the following ingredients by weight: 45 parts of corn flour, 32 parts of millet flour, 12 parts of bone meal, 26 parts of blood meal, 24 parts of shell powder, 5 parts of lutein, 4 parts of soybean lecithin, 3 parts of glycerin, 5 parts of avocado oil, 10 parts of folic acid, 1.3 parts of biotin, and 2.4 parts of spirulina powder;

[0048] S5. Flock transfer management: Select brooding chickens and eliminate sick, disabled, and poorly growing chickens. Fast the chickens before transfer to reduce adverse operational stress. Transfer them to laying cages. Five days after transfer, add anti-stress drugs to the drinking water at a mass-to-volume ratio of 4.5 mg / mL to drinking water. The anti-stress drugs include the following raw materials in parts by weight: 55 parts of vitamin C, 65 parts of vitamin E, 45 parts of vitamin B6, 30 parts of vitamin B12, 35 parts of yeast chromium, 15 parts of fumaric acid, 35 parts of γ-aminobutyric acid, and 30 parts of glutamine.

[0049] S6. Management during the laying period: After transferring to the laying hen house, the stocking density is 8 chickens / m 2 The temperature of the chicken house was adjusted to 25°C and the humidity was maintained at 70%. In the early stage of laying, a nutritional fortification feed was added. The amount of the supplement was 5.5% of the weight of the late stage feed. The nutritional fortification feed was astaxanthin, cantharidin and allicin with a mass ratio of 35:22:10. The gonadal activity of the laying hens was promoted through light stimulation until the late stage of laying, when the eggs were collected.

[0050] Light stimulation is divided into three stages. The first stage: alternating red and yellow light irradiation, red light irradiation for 40 minutes, then yellow light irradiation for 40 minutes, and the alternation continues for 16 hours; the second stage: alternating blue and white light irradiation, blue light irradiation for 55 minutes, then switching to white light irradiation for 35 minutes, and the alternation continues for 30 hours; the third stage: alternating yellow and white light irradiation, yellow light irradiation for 45 minutes, then switching to white light for 50 minutes, and the duration is 18 hours; the above-mentioned S6 red light intensity is 30 Lux, yellow light intensity is 35 Lux, blue light intensity is 20 Lux, and white light intensity is 30 Lux.

[0051] Example 3

[0052] A laying hen breeding method for extending the egg-laying cycle comprises the following steps:

[0053] S1. Equipment installation: Build a 6-layer stacked chicken cage with a breeding capacity of 50 chickens / m 2 , install automatic feeding, drinking water, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment;

[0054] S2. Chicken house preparation: Thoroughly clean and disinfect the chicken house. Maintain the oxygen content in the air quality of the chicken house at 22%, the carbon dioxide concentration below 3500ppm, and the ammonia concentration below 20ppm to ensure a clean and sanitary environment and a suitable growth environment for the chickens.

[0055] S3. Select the chicken breed: Select healthy chicks. Check the chicks' feathers and select those with neat and shiny feathers. Check the chicks' anus and select those with a clean area around the anus and no feces. Feel the chicks' abdomens and select those with soft abdomens and no lumps.

[0056] S4, Brooding Stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1-3 days of age, the temperature of the brooding house is maintained at 34°C, and then reduced by 2°C each week until it reaches 20°C. The relative humidity is 65%, the light intensity is 23 hours, and the light intensity is 23 Lux. Feed the chicks a starter feed with a daily feed amount of 20% of the chick weight. The starter feed includes the following ingredients by weight: 40 parts soybean meal, 17 parts fish meal, 10 parts blood meal, 0.3 parts methionine, 1.0 parts lysine, 0.4 parts vitamin A, 0.3 parts B vitamins, and 0.2 parts yeast.

[0057] From 10-14 days of age, light intensity is 18 lux for 18 hours, and the chicks are transitioned from starter feed to early feed. The daily feeding amount is 20% of the chick weight. The early feed includes the following raw materials by weight: 70 parts of soybean meal, 25 parts of fish meal, 10 parts of blood meal, 12 parts of barley flour, 0.3 parts of methionine, 1 part of lysine, 0.4 parts of vitamin A, 0.3 parts of B vitamins, 0.2 parts of yeast, 0.23 parts of protease, and 0.2 parts of lipase.

[0058] From 28-35 days of age, light intensity is 13 lux for 13 hours, and the chicks are transitioned from the early feed to the late feed, with a daily feeding amount of 30% of the chick weight to complete the brooding stage; the late feed includes the following ingredients by weight: 38 parts of corn flour, 25 parts of millet flour, 10 parts of bone meal, 22 parts of blood meal, 23 parts of shell powder, 4 parts of lutein, 3 parts of soybean lecithin, 2 parts of glycerin, 4 parts of avocado oil, 8 parts of folic acid, 0.8 parts of biotin, and 1.8 parts of spirulina powder;

[0059] S5. Transfer management: Select brooding chickens and eliminate sick, disabled, and poorly growing chickens. Fast the chickens before transfer to reduce adverse operational stress. Transfer them to laying cages. Four days after transfer, add anti-stress drugs to the drinking water at a mass-to-volume ratio of 3.5:100 mg / mL. The anti-stress drugs include the following raw materials in parts by weight: 40 parts vitamin C, 50 parts vitamin E, 35 parts vitamin B6, 20 parts vitamin B12, 25 parts yeast chromium, 12 parts fumaric acid, 28 parts gamma-aminobutyric acid, and 22 parts glutamine.

[0060] S6. Management during the laying period: After transferring to the laying hen house, the stocking density is 7 chickens / m 2 , adjust the temperature of the chicken house to 22℃, maintain the humidity at 60%, add nutritional fortification feed in the early stage of laying, the supplement amount is 4.5% of the weight of the late stage feed, and the nutritional fortification feed is astaxanthin, cantharidin and allicin with a mass ratio of 30:17:9. Through light stimulation, the gonad activity of laying hens is promoted until the late stage of laying, and eggs are collected;

[0061] Light stimulation is divided into three stages. The first stage: alternating red and yellow light irradiation, red light irradiation for 30 minutes, then yellow light irradiation for 30 minutes, and the alternation continues for 15 hours; the second stage: alternating blue and white light irradiation, blue light irradiation for 50 minutes, then switching to white light irradiation for 25 minutes, and the alternation continues for 24 hours; the third stage: alternating yellow and white light irradiation, yellow light irradiation for 30 minutes, then switching to white light for 40 minutes, and the duration is 16 hours; the above-mentioned S6 red light intensity is 20Lux, yellow light intensity is 20Lux, blue light intensity is 15Lux, and white light intensity is 25Lux.

[0062] Comparative Example 1

[0063] The difference between this comparative example and Example 3 is that the S4 brooding stage is in accordance with the unified brooding stage, the lighting is 12 h, the light intensity is 10 Lux, and the feeding feed includes the following raw materials in parts by weight: 50 parts of soybean meal, 20 parts of fish meal, 8 parts of blood meal, 10 parts of barley flour, 0.1 parts of methionine, 0.8 parts of lysine, 0.3 parts of vitamin A, 0.2 parts of B vitamins, 0.1 parts of yeast, 0.2 parts of protease, and 0.1 parts of lipase. The feeding amount is 10% of the mass of the chicks until 35 days of age.

[0064] Comparative Example 2

[0065] The difference between this comparative example and Example 3 is that no anti-stress drug was added in the group transfer management of S5.

[0066] Comparative Example 3

[0067] The difference between this comparative example and Example 3 is that the light stimulation in the egg-laying period management of S6 is one stage, and red light and yellow light are used alternately. After 20 minutes of red light irradiation, it is changed to 20 minutes of yellow light irradiation. The red light intensity is 10 Lux and the yellow light intensity is 5 Lux, and the alternation continues for 36 hours.

[0068] 1. Production performance indicators

[0069] The egg production rate and egg laying cycle of laying hens were measured according to the breeding methods of Examples 1-3 and Comparative Examples 1-3 above;

[0070] Table 1:

[0071] Egg production rate (%) Egg weight (g) Egg laying cycle (days) Example 1 95% at peak and 80% at later stage 65±2 750 Example 2 92% at peak and 78% at later stage 66±4 780 Example 3 97% at peak and 81% at later stage 68±5 760 Comparative Example 1 80% at the peak, and dropped to 55% in the later period 55±3 620 Comparative Example 2 78% at the peak and 52% at the end 58±5 600 Comparative Example 3 75% at peak period and below 50% at later period 54±6 580

[0072] The laying hens of Examples 1-3 outperformed Comparative Examples 1-3 in both egg production rate and egg-laying cycle. Specifically, the laying hens of Examples 1-3 achieved an egg production rate of over 90% during peak production, and maintained a stable egg production rate of around 80% in the later stages. Their egg-laying cycles were also relatively long, exceeding 750 days. In contrast, the laying hens of Comparative Examples 1-3 had significantly lower egg production rates during peak production, with a significant drop in production in the later stages, and a relatively short egg-laying cycle. This demonstrates that the breeding methods of Examples 1-3 are significantly effective in increasing egg production rates and extending egg-laying cycles in laying hens.

[0073] 2. Eggshell quality test

[0074] The eggshell strength, eggshell thickness, eggshell color and glossiness of the eggs produced in Examples 1-3 and Comparative Examples 1-3 were measured.

[0075] Table 2:

[0076] Eggshell strength (N / cm²) Eggshell thickness (mm) Eggshell color and glossiness Example 1 4.4 0.34 Dark brown, good gloss, smooth surface Example 2 4.3 0.35 Dark brown, good gloss, smooth surface Example 3 4.5 0.37 Dark brown, good gloss, smooth surface Comparative Example 1 3.4 0.28 Light brown, average gloss, smooth surface Comparative Example 2 3.3 0.30 Light color, poor gloss, slightly rough surface Comparative Example 3 2.8 0.27 Light brown, weak luster, rough surface

[0077] The eggs of Examples 1-3 were superior to those of Comparative Examples 1-3 in terms of eggshell strength, eggshell thickness, eggshell color, and glossiness. The eggs of Examples 1-3 had higher eggshell strength, capable of withstanding greater external forces without breaking easily; their eggshells were also thicker, providing better protection; and their eggshells were dark brown, glossy, and smooth, with an overall high-quality appearance. The eggs of Comparative Examples 1-3, on the other hand, performed poorly in these aspects, with lower eggshell strength, thinner thickness, lighter color, poor gloss, and a slightly rough surface. This demonstrates that the culture methods of Examples 1-3 are also significantly effective in improving eggshell quality.

[0078] 3. Nutritional status indicators

[0079] The nutritional status indicators of laying hens after laying eggs were tested using the breeding methods of Examples 1-3 and Comparative Examples 1-3.

[0080] Table 3:

[0081] Weight (kg) Hemoglobin concentration (g / dL) Serum albumin concentration (g / dL) Example 1 1.9 14.0 3.5 Example 2 1.8 14.2 3.7 Example 3 2.0 14.5 3.8 Comparative Example 1 1.5 12.5 2.7 Comparative Example 2 1.6 13.0 3.0 Comparative Example 3 1.4 12.3 2.5

[0082] The laying hens of Examples 1 to 3 were superior to those of Comparative Examples 1 to 3 in terms of body weight, hemoglobin concentration, and serum albumin concentration. The laying hens of Examples 1 to 3 were heavier in body weight and had higher hemoglobin concentration and serum albumin concentration, indicating that they had better nutritional status and stronger physiological functions.

[0083] It shows that the breeding method, feed formula and feeding management conditions adopted in the present invention have significant effects in improving the production performance indicators of laying hens, improving the eggshell quality and enhancing the nutritional status of laying hens.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laying hen breeding method for extending the egg-laying cycle, characterized in that: The following steps are involved: S1. Equipment installation: Build 4-8 stacked chicken cages with a breeding capacity of 30-60 chickens / m 2 , install automatic feeding, drinking water, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment; S2. Chicken house preparation: Clean and disinfect the chicken house; S3. Select the chicken breed: Select healthy chicks. Check the chicks' feathers and select those with neat and shiny feathers. Check the chicks' anus and select those with a clean area around the anus and no feces. Feel the chicks' abdomens and select those with soft abdomens and no lumps. S4, Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1-3 days old, the temperature of the brooding house is maintained at 33-35℃, and then reduced by 2-3℃ every week until it drops to 18-22℃. The relative humidity is 60-70%, the light intensity is 22-24h, and the light intensity is 20-25Lux. Feed the starter feed with a daily feeding amount of 18-22% of the chick weight. From 10-14 days old, the light intensity is 16-20h, and the light intensity is 15-20Lux. Transition from starter feed to early feed with a daily feeding amount of 10-25% of the chick weight. From 28-35 days old, the light intensity is 12-15h, and the light intensity is 10-15Lux. Transition from early feed to late chick feed with a daily feeding amount of 25-35% of the chick weight to complete the brooding stage; S5. Transfer management: Select brooding chickens and eliminate sick, disabled, and poorly growing chickens. Before transferring, fast the chickens and transfer them to laying cages. 3-5 days after transfer, add anti-stress drugs to drinking water at a mass-to-volume ratio of 1.2-4.5 mg / mL to drinking water. S6. Management during laying period: After transferring to the laying hen house, the stocking density is 5-8 chickens / m 2 , adjust the temperature of the chicken house to 18-25℃, maintain the humidity at 50-70%, add nutritional fortification feed in the early stage of egg production, promote the gonad activity of laying hens through light stimulation, and collect eggs until the late stage of egg production; The anti-stress drug S5 comprises the following raw materials in parts by weight: 25-55 parts of vitamin C, 35-65 parts of vitamin E, 12-45 parts of vitamin B6, 10-30 parts of vitamin B12, 12-35 parts of yeast chromium, 8-15 parts of fumaric acid, 22-35 parts of gamma-aminobutyric acid, and 12-30 parts of glutamine; The nutritional fortification material of S6 is astaxanthin, canthaxanthin and allicin in a mass ratio of (25-35):(12-22):(8-10); The light stimulation of S6 is divided into three stages: the first stage: alternating irradiation of red light and yellow light, red light irradiation for 20-40 minutes, then yellow light irradiation for 20-40 minutes, and continuous alternation for 14-16 hours; the second stage: alternating irradiation of blue light and white light, blue light irradiation for 45-55 minutes, then switching to white light irradiation for 15-35 minutes, and continuous alternation for 20-30 hours; the third stage: alternating irradiation of yellow light and white light, yellow light irradiation for 15-45 minutes, then switching to white light for 30-50 minutes, and continuous for 12-18 hours.

2. The method for raising laying hens to prolong the egg-laying period according to claim 1, wherein: The oxygen content in the air quality of the chicken house in S2 is maintained at 20-23%, the carbon dioxide concentration is below 3500ppm, and the ammonia concentration is less than 20ppm.

3. The method for raising laying hens to prolong the egg-laying period according to claim 1, wherein: The starter feed in S4 includes the following raw materials in parts by weight: 30-50 parts of soybean meal, 12-22 parts of fish meal, 8-12 parts of blood meal, 0.1-0.5 parts of methionine, 0.8-1.2 parts of lysine, 0.3-0.5 parts of vitamin A, 0.2-0.4 parts of B vitamins, and 0.1-0.3 parts of yeast.

4. The method for raising laying hens to prolong the egg-laying period according to claim 1, wherein: The preliminary material in S4 includes the following raw materials in parts by weight: 50-80 parts of soybean meal, 20-30 parts of fish meal, 8-12 parts of blood meal, 10-15 parts of barley flour, 0.1-0.5 parts of methionine, 0.8-1.2 parts of lysine, 0.3-0.5 parts of vitamin A, 0.2-0.4 parts of B vitamins, 0.1-0.3 parts of yeast, 0.2-0.4 parts of protease, and 0.1-0.3 parts of lipase.

5. The laying hen breeding method for extending the egg-laying period according to claim 1, wherein: The late-stage material in the S4 includes the following raw materials in parts by weight: 32-45 parts of corn flour, 12-32 parts of millet flour, 5-12 parts of bone meal, 13-26 parts of blood meal, 22-24 parts of shell powder, 3-5 parts of lutein, 2-4 parts of soybean lecithin, 1-3 parts of glycerin, 3-5 parts of avocado oil, 5-10 parts of folic acid, 0.2-1.3 parts of biotin, and 1.3-2.4 parts of spirulina powder.

6. The method for raising laying hens to prolong the egg-laying period according to claim 1, wherein: The amount of the nutritionally enhanced feed in S6 is 3.5-5.5% of the mass of the late stage feed.

7. The method for raising laying hens to prolong the egg-laying period according to claim 1, wherein: The S6 red light intensity is 10-30 Lux, the yellow light intensity is 15-35 Lux, the blue light intensity is 5-20 Lux, and the white light intensity is 15-30 Lux.