Laying hen breeding method capable of prolonging egg laying period

Abstract

The invention provides a laying hen breeding method capable of prolonging the egg laying period. The method comprises the steps of equipment installation, chicken house preparation, chicken breed selection, brooding stage, group transfer management, egg laying period management and the like. And building a stacked coop, installing automatic equipment, and cleaning and sterilizing the coop. Healthy chicks are selected, and temperature, humidity and illumination are controlled and different feeds are fed during brooding. Bad chickens are eliminated before flock transferring, and anti-stress drugs are added after flock transferring. In the egg producing period, the feeding density, temperature and humidity are controlled, nutrient enrichment materials are supplemented, and gonad activity is promoted through light stimulation. The mouth-opening material, the early-stage material, the later-stage material, the anti-stress medicine and the nutrient enrichment material all have specific formulas. Light stimulation is divided into three stages, and light with different colors irradiates alternately and has different intensities. According to the method, a good growth environment and nutrition are provided for the laying hens from multiple aspects, the laying rate of the laying hens can be increased, the laying period can be prolonged, and the method has high practical application value.

Description

Technical Field

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

[0002] The laying hen breeding industry is an important part of the livestock industry. With the improvement of people's living standards and the pursuit of healthy foods, the quality of eggs has received increasing attention. However, there are some deficiencies in traditional laying hen breeding methods, such as a relatively short laying cycle, unstable eggshell quality, and low feed conversion rate. These problems limit the sustainable development of the laying hen breeding industry and the improvement of economic benefits.

[0003] Firstly, in traditional breeding methods, the laying cycle of laying hens is usually relatively short, generally not exceeding one year, which leads to frequent replacement of chicken flocks by farmers, increasing breeding costs. Secondly, eggshell quality is one of the important indicators for measuring egg quality, but in traditional breeding, the control of eggshell strength, thickness, color, and glossiness is not precise enough, resulting in easy breakage of eggs during transportation and storage, affecting sales. In addition, feed conversion rate is a key indicator for measuring breeding efficiency. Traditional breeding methods often have problems such as feed waste and low conversion rate, which not only increase breeding costs but also are not conducive to environmental protection and 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 laying cycle to solve the above problems.

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

[0006] S1. Equipment installation: Build a 4 - 8 - layer stacked chicken cage with a breeding density of 30 - 60 birds / 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 a clean, hygienic, and suitable growth environment inside the chicken house;

[0008] S3. Chicken breed selection: Select healthy chicks, check the feathers of the chicks, choose chicks with neat and shiny feathers, check the anus of the chicks, choose chicks with a clean anus and no fecal adhesion, and touch the abdomen of the chicks, choose chicks with a soft abdomen and no hard lumps;

[0009] S4. Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. Starting from 1 to 3 days old, keep the temperature of the brooding house at 33 - 35 °C, and then reduce it by 2 - 3 °C every week until it reaches 18 - 22 °C. The relative humidity is 60 - 70%, the lighting is 22 - 24 h, the light intensity is 20 - 25 Lux. Feed the starter feed, and the daily feeding amount is 18 - 22% of the chick weight. Starting from 10 to 14 days old, the lighting is 16 - 20 h, the light intensity is 15 - 20 Lux, and transition from the starter feed to the early-stage feed, with the daily feeding amount being 10 - 25% of the chick weight. Starting from 28 to 35 days old, the lighting is 12 - 15 h, the light intensity is 10 - 15 Lux, and transition from the early-stage feed to the late-stage chick feed, with the daily feeding amount being 25 - 35% of the chick weight, thus completing the brooding stage;

[0010] S5. Flock transfer management: Select the brooded chicks, cull the sick, weak, disabled and poorly growing chickens. Keep the flock empty-stomached before transfer, which can reduce the stress of poor transfer. Transfer them to the laying cages. 3 - 5 days after transfer, add anti-stress drugs to the drinking water, with the mass-to-volume ratio mg / mL of the drug to the drinking water being 1.2 - 4.5:100;

[0011] S6. Laying period management: After being transferred to the laying hen house, the stocking density is 5 - 8 birds / m 2 , adjust the chicken house temperature to 18 - 25 °C, keep the humidity at 50 - 70%. Supplement nutritional fortified feed in the early laying period, and promote the gonadal activity of the laying hens through light stimulation until the late laying period, and then collect the eggs.

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

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

[0014] Further, the early-stage feed in S4 includes the following raw materials by weight: 50 - 80 parts of soybean meal powder, 20 - 30 parts of fish meal, 8 - 12 parts of blood meal, 10 - 15 parts of barley flour, 0.1 - 0.5 part of methionine, 0.8 - 1.2 parts of lysine, 0.3 - 0.5 part of vitamin A, 0.2 - 0.4 part of vitamin B group, 0.1 - 0.3 part of yeast, 0.2 - 0.4 part of protease, 0.1 - 0.3 part of lipase.

[0015] Further, the later-stage feed in S4 comprises 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 phospholipid, 1-3 parts of glycerol, 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] Further, the anti-stress drug in 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 γ-aminobutyric acid, and 12-30 parts of glutamine.

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

[0018] Further, the supplement amount of the nutritional fortifier in S6 is 3.5-5.5% of the mass of the later-stage feed.

[0019] Further, the light stimulation in S6 is divided into 3 stages. The first stage: red light and yellow light are alternately irradiated. After red light is irradiated for 20-40 min, it is replaced by yellow light irradiation for 20-40 min, and the alternation continues for 14-16 h. The second stage: blue light and white light are alternately irradiated. Blue light is irradiated for 45-55 min, and then switched to white light irradiation for 15-35 min, and the alternation continues for 20-30 h. The third stage: yellow light and white light are alternately irradiated. After yellow light is irradiated for 15-45 min, it is switched to white light for 30-50 min, and it lasts for 12-18 h.

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

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) Provide an excellent breeding environment: Build a multi-layer stacked chicken cage and install automatic equipment, which improves the breeding efficiency, reduces labor costs, and at the same time ensures the timely supply of feed and water, as well as the high efficiency of feces cleaning and egg collection, providing a stable and comfortable living environment for laying hens; Clean and disinfect the chicken house to ensure the sanitary conditions of the chicken house, effectively reducing the risk of laying hens getting sick. Control the air quality in the chicken house so that the oxygen content, carbon dioxide, and ammonia concentrations are maintained within an appropriate range, providing a good air environment for the growth of laying hens, which helps to improve the health level and production performance of laying hens.

[0023] (2)Optimize brooding management: Precisely control temperature, humidity, and lighting. Adjust the lighting time and intensity according to the different ages of chicks, and reasonably transition the feed in different stages to meet the growth and development needs of chicks. The scientific formulas of starter feed, early-stage feed, and late-stage feed provide comprehensive nutrition for chicks, promote their growth and development, and improve survival rate and growth speed.

[0024] (3)Enhance chicken health: Select brooding chicks before transfer, eliminate sick, weak, disabled, and poorly growing chickens to improve the overall quality of the chicken flock. Keep the chicken flock fasting before transfer to reduce stress during the transfer process; add anti-stress drugs to the drinking water to effectively relieve the stress of the chicken flock during the transfer process, improve the adaptability of the chicken flock, enhance the immunity and resistance of chickens, and reduce the occurrence of diseases.

[0025] (4)Prolong the laying cycle: Reasonably control the stocking density, temperature, and humidity. By adding specific nutrients to the feed, provide a suitable laying environment for laying hens. Feed fortified feed. The combination of astaxanthin, canthaxanthin, and allicin helps improve the immunity, antioxidant capacity, and reproductive system function of laying hens, thereby prolonging the laying cycle. Phased light stimulation promotes the gonadal activity of laying hens. By alternating irradiation of different colors of light and specific light intensity and time, regulate the physiological rhythm of laying hens, improve the laying rate, effectively prolong the laying cycle of laying hens, and improve the laying performance and economic value of laying hens. Specific implementation manners

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

[0027] The experimental methods used in the embodiments of the present invention are all conventional methods unless otherwise specified.

[0028] The materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial channels unless otherwise specified.

[0029] Embodiment 1

[0030] A method for raising laying hens to prolong the laying cycle: including the following steps:

[0031] S1. Equipment installation: Build a 4-layer stacked chicken cage with a stocking density of 30 birds / 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. Keep the oxygen content in the air quality of the chicken house at 20%, the carbon dioxide concentration below 3500 ppm, and the ammonia concentration less than 20 ppm to ensure a clean, hygienic, and suitable growth environment in the chicken house;

[0033] S3. Select chicken breed: Select healthy chicks. Check the feathers of the chicks and choose those with neat and shiny feathers. Examine the anus of the chicks and choose those with a clean anus and no feces adhesion. Touch the abdomen of the chicks and choose those with a soft abdomen and no hard lumps.

[0034] S4. Brooding stage: After the chicks enter the house, adjust the air quality and microclimate of the chicken house. From 1 to 3 days old, keep the temperature of the brooding house at 33 °C, and then reduce it by 2 °C every week until it reaches 18 °C. The relative humidity is 60%, the light is 22 h, the light intensity is 20 Lux, and feed the starter feed. The daily feeding amount is 18% of the chick weight. The starter feed includes the following raw materials by weight: 30 parts of soybean meal powder, 12 parts of fish meal, 8 parts of blood meal, 0.1 part of methionine, 0.8 part of lysine, 0.3 part of vitamin A, 0.2 part of vitamin B group, 0.1 part of yeast.

[0035] From 10 to 14 days old, the light is 16 h, the light intensity is 15 Lux, and transition from the starter feed to the pre-starter feed. The daily feeding amount is 10% of the chick weight. The pre-starter feed includes the following raw materials by weight: 50 parts of soybean meal powder, 20 parts of fish meal, 8 parts of blood meal, 10 parts of barley flour, 0.1 part of methionine, 0.8 part of lysine, 0.3 part of vitamin A, 0.2 part of vitamin B group, 0.1 part of yeast, 0.2 part of protease, 0.1 part of lipase.

[0036] From 28 to 35 days old, the light is 12 h, the light intensity is 10 Lux, and transition from the pre-starter feed to the post-chick feed. The daily feeding amount is 25% of the chick weight to complete the brooding stage. The post-chick feed includes the following raw materials by weight: 32 parts of corn flour, 12 parts of millet flour, 5 parts of bone meal, 13 parts of blood meal, 22 parts of shell powder, 3 parts of lutein, 2 parts of soy lecithin, 1 part of glycerol, 3 parts of avocado oil, 5 parts of folic acid, 0.2 part of biotin, 1.3 parts of spirulina powder.

[0037] S5. Transfer management: Select the brooded chicks, cull the weak, diseased, disabled and poorly growing chickens. Keep the chicken flock empty before transfer to reduce adverse transfer stress. Transfer them to the laying cages. Three days after transfer, add anti-stress drugs to the drinking water, and the mass-volume ratio mg / mL with the drinking water is 1.2:100. The anti-stress drugs include the following raw materials by weight: 25 parts of vitamin C, 35 parts of vitamin E, 12 parts of vitamin B6, 10 parts of vitamin B12, 12 parts of yeast chromium, 8 parts of fumaric acid, 22 parts of γ-aminobutyric acid, 12 parts of glutamine.

[0038] S6. Laying period management: After transferring to the laying hen house, the stocking density is 5 birds / m 2, adjust the temperature of the chicken coop to 18°C, keep the humidity at 50%, supplement nutritional fortified feed at the initial stage of egg production, and the supplement amount is 3.5% of the quality of the later-stage feed. The nutritional fortified feed is astaxanthin, canthaxanthin, and allicin with a mass ratio of 25:12:8. Promote the gonadal activity of laying hens through light stimulation until the later stage of egg production, and collect eggs;

[0039] The light stimulation is divided into three stages. The first stage: alternate irradiation with red light and yellow light. After irradiating with red light for 20 minutes, switch to irradiating with yellow light for 20 minutes, and alternate continuously for 14 hours. The second stage: alternate irradiation with blue light and white light. Irradiate with blue light for 45 minutes, switch to irradiate with white light for 15 minutes, and alternate continuously for 20 hours. The third stage: alternate irradiation with yellow light and white light. After irradiating with yellow light for 15 minutes, switch to white light for 30 minutes, and last for 12 hours. The intensity of the red light in the above S6 is 10 Lux, the intensity of the yellow light is 15 Lux, the intensity of the blue light is 5 Lux, and the intensity of the white light is 15 Lux.

[0040] Example 2

[0041] A method for raising laying hens to extend the egg-laying cycle: includes the following steps:

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

[0043] S2. Chicken coop preparation: Thoroughly clean and disinfect the chicken coop. Keep the oxygen content in the air quality of the chicken coop at 23%, the carbon dioxide concentration below 3500 ppm, and the ammonia concentration less than 20 ppm to ensure a clean and hygienic environment and a suitable growth environment in the chicken coop;

[0044] S3. Select chicken breeds: Select healthy chicks, check the feathers of the chicks, choose chicks with neat and shiny feathers, check the anus of the chicks, choose chicks with a clean anus and no feces adhesion, touch the abdomen of the chicks, and choose chicks with a soft abdomen and no hard lumps;

[0045] S4. Chick rearing stage: After the chicks enter the coop, adjust the air quality and microclimate of the chicken coop. Starting from 1 to 3 days old, keep the temperature of the chick rearing coop at 35°C, and then reduce it by 3°C every week until it drops to 22°C. The relative humidity is 70%, the light is 24 hours, and the light intensity is 25 Lux. Feed the starter feed, and the daily feeding amount is 22% of the chick quality. The starter feed includes the following raw materials in parts by weight: 50 parts of soybean meal powder, 22 parts of fish meal, 12 parts of blood meal, 0.5 part of methionine, 1.2 parts of lysine, 0.5 part of vitamin A, 0.4 part of vitamin B group, and 0.3 part of yeast;

[0046] From 10 to 14 days old, the light is on for 20 hours with a light intensity of 20 Lux. Transition from the starter feed to the early-stage feed, and the daily feeding amount is 25% of the chick's mass. The early-stage feed includes the following raw materials by weight: 80 parts of soybean meal powder, 30 parts of fish meal, 12 parts of blood meal, 15 parts of barley meal, 0.5 part of methionine, 1.2 parts of lysine, 0.5 part of vitamin A, 0.4 part of vitamin B complex, 0.3 part of yeast, 0.4 part of protease, and 0.3 part of lipase;

[0047] From 28 to 35 days old, the light is on for 15 hours with a light intensity of 15 Lux. Transition from the early-stage feed to the late-stage chick feed, and the daily feeding amount is 35% of the chick's mass to complete the brooding stage. The late-stage feed includes the following raw materials 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 soy lecithin, 3 parts of glycerol, 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 the brooded chicks, cull the sick, weak, disabled, and underdeveloped chickens. Keep the flock fasting before transfer to reduce the stress of poor transfer. Transfer them to the laying cages. Five days after transfer, add an anti-stress drug to the drinking water, with a mass-volume ratio of mg / mL of 4.5:100 to the drinking water. The anti-stress drug includes the following raw materials 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. Laying period management: After transferring to the laying hen house, the stocking density is 8 birds / m 2 , adjust the chicken house temperature to 25 °C, keep the humidity at 70%. Supplement the nutritional fortified feed at the initial laying stage, with a supplement amount of 5.5% of the mass of the late-stage feed. The nutritional fortified feed is astaxanthin, canthaxanthin, and allicin with a mass ratio of 35:22:10. Promote the gonadal activity of laying hens through light stimulation until the late laying stage, and collect eggs;

[0050] The light stimulation is divided into three stages. The first stage: Alternate irradiation with red light and yellow light. After irradiating with red light for 40 minutes, switch to yellow light irradiation for 40 minutes, and continue to alternate for 16 hours. The second stage: Alternate irradiation with blue light and white light. Irradiate with blue light for 55 minutes and switch to white light irradiation for 35 minutes, and continue to alternate for 30 hours. The third stage: Alternate irradiation with yellow light and white light. After irradiating with yellow light for 45 minutes, switch to white light for 50 minutes, and continue for 18 hours. The red light intensity in the above S6 is 30 Lux, the yellow light intensity is 35 Lux, the blue light intensity is 20 Lux, and the white light intensity is 30 Lux.

[0051] Example 3

[0052] A method for raising laying hens to extend the laying cycle: including the following steps:

[0053] S1. Equipment installation: Build a 6-layer stacked chicken cage with a feeding capacity of 50 birds per square meter 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. The oxygen content in the air quality of the chicken house should be maintained at 22%, the carbon dioxide concentration should be below 3500 ppm, and the ammonia concentration should be less than 20 ppm to ensure a clean, hygienic, and suitable growth environment in the chicken house;

[0055] S3. Select chicken breeds: Select healthy chicks. Check the feathers of the chicks and choose chicks with neat and shiny feathers. Check the anus of the chicks and choose chicks with a clean anus and no fecal adhesion. Touch the abdomen of the chicks and choose chicks with a soft abdomen and no hard lumps;

[0056] S4. Brooding stage: After the chicks enter the house, adjust the air quality and microclimate in the chicken house. From 1 to 3 days old, the temperature in the brooding house is maintained at 34 °C, and then it is reduced by 2 °C every week until it reaches 20 °C. The relative humidity is 65%, the light is 23 hours, the light intensity is 23 Lux, and the starter feed is fed. The daily feeding amount is 20% of the chick's weight. The starter feed includes the following raw materials by weight: 40 parts of soybean meal powder, 17 parts of fish meal, 10 parts of blood meal, 0.3 parts of methionine, 1.0 part of lysine, 0.4 part of vitamin A, 0.3 part of vitamin B complex, 0.2 part of yeast;

[0057] From 10 to 14 days old, the light is 18 hours, the light intensity is 18 Lux, and it is transitioned from the starter feed to the pre-starter feed. The daily feeding amount is 20% of the chick's weight. The pre-starter feed includes the following raw materials by weight: 70 parts of soybean meal powder, 25 parts of fish meal, 10 parts of blood meal, 12 parts of barley powder, 0.3 parts of methionine, 1 part of lysine, 0.4 part of vitamin A, 0.3 part of vitamin B complex, 0.2 part of yeast, 0.23 part of protease, 0.2 part of lipase;

[0058] From 28 to 35 days old, the light is 13 hours, the light intensity is 13 Lux, and it is transitioned from the pre-starter feed to the post-chick feed. The daily feeding amount is 30% of the chick's weight to complete the brooding stage; The post-chick feed includes the following raw materials 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 soy lecithin, 2 parts of glycerol, 4 parts of avocado oil, 8 parts of folic acid, 0.8 part of biotin, 1.8 parts of spirulina powder;

[0059] S5. Transfer group management: Select the brood chickens, cull the weak, diseased, disabled and poorly growing chickens. Keep the chicken group empty-stomached before transfer to reduce the stress of poor operation. Transfer them to the laying cages. Four days after transfer, add anti-stress drugs to the drinking water at a mass-volume ratio of mg / mL of 3.5:100. The anti-stress drugs include the following raw materials by weight: 40 parts of vitamin C, 50 parts of vitamin E, 35 parts of vitamin B6, 20 parts of vitamin B12, 25 parts of chromium yeast, 12 parts of fumaric acid, 28 parts of γ-aminobutyric acid, and 22 parts of glutamine.

[0060] S6. Laying period management: After transferring to the laying hen house, the stocking density is 7 chickens / m 2 , adjust the chicken house temperature to 22 °C and keep the humidity at 60%. Supplement nutritional fortified feed at the beginning of the laying period, and the supplement amount is 4.5% of the quality of the later-stage feed. The nutritional fortified feed is astaxanthin, canthaxanthin and allicin with a mass ratio of 30:17:9. Promote the gonadal activity of laying hens through light stimulation until the late laying period, and collect eggs.

[0061] The light stimulation is divided into three stages. The first stage: Alternate irradiation with red light and yellow light. After irradiating with red light for 30 min, switch to irradiating with yellow light for 30 min, and continue to alternate for 15 h. The second stage: Alternate irradiation with blue light and white light. Irradiate with blue light for 50 min and switch to irradiate with white light for 25 min, and continue to alternate for 24 h. The third stage: Alternate irradiation with yellow light and white light. After irradiating with yellow light for 30 min, switch to white light for 40 min, and continue for 16 h. The red light intensity, yellow light intensity, blue light intensity and white light intensity in the above S6 are 20 Lux, 20 Lux, 15 Lux and 25 Lux respectively.

[0062] Comparative Example 1

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

[0064] Comparative Example 2

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

[0066] Comparative Example 3

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

[0068] I. Production performance indicators

[0069] The laying rates and laying cycles of laying hens were measured according to the breeding methods of the above Examples 1 - 3 and Comparative Examples 1 - 3;

[0070] Table 1:

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

[0072] The laying hens in Examples 1 - 3 were superior to those in Comparative Examples 1 - 3 in terms of laying rate and laying cycle. Specifically, the laying hens in Examples 1 - 3 reached a laying rate of over 90% during the peak period, and the stable laying rate in the later stage also remained at about 80%. The laying cycle was also relatively long, all above 750 days. While the laying hens in Comparative Examples 1 - 3 had a significantly lower laying rate during the peak period, and it decreased significantly in the later stage, and the laying cycle was relatively short. This shows that the breeding methods in Examples 1 - 3 have significant effects in improving the laying rate of laying hens and extending the laying cycle.

[0073] II. Eggshell quality test

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

[0075] Table 2:

[0076] Eggshell strength (N / cm²) Eggshell thickness (mm) Eggshell color and gloss 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, relatively smooth surface Comparative Example 2 3.3 0.30 Lighter color, poor gloss, slightly rough surface Comparative Example 3 2.8 0.27 Light brown, weak gloss, rough surface

[0077] The eggs in the above Examples 1 - 3 were superior to those in Comparative Examples 1 - 3 in terms of eggshell strength, eggshell thickness, eggshell color and glossiness. The eggshells of the eggs in Examples 1 - 3 had a higher strength and could withstand greater external forces without being easily broken; the eggshell thickness was also thicker, which could provide better protection; at the same time, the eggshell color was dark brown, with good glossiness, smooth surface, and the overall appearance quality was relatively high. While the eggs in Comparative Examples 1 - 3 performed poorly in these aspects, with low eggshell strength, thin thickness, light color, poor glossiness, and the surface was slightly rough. This shows that the breeding methods in Examples 1 - 3 also have significant effects in improving the eggshell quality.

[0078] III. Nutritional status indicators

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

[0080] Table 3:

[0081] Body 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 in Examples 1-3 were superior to those in Comparative Examples 1-3 in terms of body weight, hemoglobin concentration, and serum albumin concentration. The laying hens in Examples 1-3 had a heavier body weight, higher hemoglobin concentration, and higher 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 indexes of laying hens, improving the eggshell quality, and enhancing the nutritional status of laying hens.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for raising laying hens to extend the laying cycle, characterized in that: It includes the following steps: S1. Equipment installation: Build a 4- to 8-layer stacked chicken cage with a feeding capacity of 30-60 chickens per square meter 2 , install automatic feeding, drinking, manure cleaning, and egg collection equipment, and ensure the normal operation of the equipment; S2. Chicken coop preparation: Clean and disinfect the chicken coop. S3. Chicken breed selection: Select healthy chicks. Check the feathers of the chicks and choose those with neat and shiny feathers. Check the anus of the chicks and choose those with a clean anus without feces adhesion. Touch the abdomen of the chicks and choose those with a soft abdomen without hard lumps. S4. Brooding stage: After the chicks enter the coop, adjust the air quality and microclimate in the chicken coop. From 1 to 3 days old, keep the temperature in the brooding coop at 33 - 35°C, and then reduce it by 2 - 3°C every week until it reaches 18 - 22°C. The relative humidity is 60 - 70%, the light is 22 - 24 hours, the light intensity is 20 - 25 Lux, feed the starter feed, and the daily feeding amount is 18 - 22% of the chick mass. From 10 to 14 days old, the light is 16 - 20 hours, the light intensity is 15 - 20 Lux, transition from the starter feed to the pre-starter feed, and the daily feeding amount is 10 - 25% of the chick mass. From 28 to 35 days old, the light is 12 - 15 hours, the light intensity is 10 - 15 Lux, transition from the pre-starter feed to the post-starter feed, and the daily feeding amount is 25 - 35% of the chick mass to complete the brooding stage. S5. Flock transfer management: Select the brooded chicks, cull the sick, weak, disabled, and poorly growing chickens. Keep the flock fasting before transfer and transfer them to the laying cages. 3 - 5 days after transfer, add an anti-stress drug to the drinking water, and the mass-to-volume ratio of the drug to the drinking water is 1.2 - 4.5:100 mg / mL. S6. Laying period management: After being transferred to the laying hen house, the stocking density is 5 - 8 hens / m 2 , adjust the temperature of the chicken house to 18 - 25 °C, keep the humidity at 50 - 70%, supplement nutritional fortified feed in the early laying period, promote the gonadal activity of laying hens through light stimulation until the late laying period, and collect eggs; The anti-stress drug in S5 includes the following raw materials 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 chromium yeast, 8 - 15 parts of fumaric acid, 22 - 35 parts of γ-aminobutyric acid, and 12 - 30 parts of glutamine. The nutritional fortified feed in S6 is astaxanthin, canthaxanthin, and allicin with a mass ratio of (25 - 35):(12 - 22):(8 - 10).

2. The laying hen breeding method for prolonging the laying cycle according to claim 1, wherein: In S2, the oxygen content in the air quality of the chicken coop is maintained at 20 - 23%, the carbon dioxide concentration is below 3500 ppm, and the ammonia concentration is less than 20 ppm.

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

4. The laying hen breeding method for prolonging the laying cycle according to claim 1, characterized in that: The pre-starter feed in S4 includes the following raw materials by weight: 50 - 80 parts of soybean meal powder, 20 - 30 parts of fish meal, 8 - 12 parts of blood meal, 10 - 15 parts of barley flour, 0.1 - 0.5 part of methionine, 0.8 - 1.2 parts of lysine, 0.3 - 0.5 part of vitamin A, 0.2 - 0.4 part of vitamin B group, 0.1 - 0.3 part of yeast, 0.2 - 0.4 part of protease, and 0.1 - 0.3 part of lipase.

5. The laying hen breeding method for prolonging the laying cycle according to claim 1, characterized in that: The later-stage feed in S4 comprises 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 soy lecithin, 1-3 parts of glycerol, 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 laying hen breeding method for prolonging the laying cycle according to claim 1, characterized in that: The supplement amount of the nutritional fortified feed in S6 is 3.5-5.5% of the mass of the later-stage feed.

7. The laying hen breeding method for extending the laying cycle according to claim 1, characterized in that: The light stimulation in S6 is divided into three stages. The first stage: red light and yellow light are alternately irradiated. After red light is irradiated for 20-40 min, it is changed to yellow light irradiation for 20-40 min, and the alternation continues for 14-16 h. The second stage: blue light and white light are alternately irradiated. Blue light is irradiated for 45-55 min, and then switched to white light irradiation for 15-35 min, and the alternation continues for 20-30 h. The third stage: yellow light and white light are alternately irradiated. After yellow light is irradiated for 15-45 min, it is switched to white light for 30-50 min, and it lasts for 12-18 h.

8. The method for raising laying hens to extend the laying cycle according to claim 7, characterized in that: The intensity of the red light in S6 is 10-30 Lux, the intensity of the yellow light is 15-35 Lux, the intensity of the blue light is 5-20 Lux, and the intensity of the white light is 15-30 Lux.