A method for raising extended-lay hens

Abstract

The application discloses a kind of extension period hen feeding method, comprising: S1, adjust illumination time to first length, stop feeding extension period hen, and keep hen free drinking water;S2, after hen reaches preset weight loss rate, hen is restored to feed;S3, after hen reaches first egg production rate, hen is fed composite feed, and composite feed includes pre-digestion feed component and standard feed component, pre-digestion feed component is formed by carrying out bacteria enzyme synergistic reaction to feed, and standard feed component includes bean pulp, corn, bran and stone powder;The method can improve egg production and feed absorption and utilization rate, improve the health level of aging hen, also can increase eggshell membrane thickness to extend the shelf life of finished egg sale, and can improve hen breeding enterprise's chicken coop equipment utilization rate, reduce feed consumption and overfeed phenomenon, and significantly improve egg hen feather covering condition, to increase the sale price of eliminated hen, improve the economic benefit of egg hen breeding enterprise.

Description

Technical Field

[0001] This invention relates to the field of poultry farming technology, and in particular to a method for raising extended-laying hens. Background Technology

[0002] In recent years, due to the soaring operating costs and highly saturated market in the egg-laying hen industry, related sectors have gradually entered an era of meager profits. Therefore, egg-laying hen farms have begun to explore extended-laying methods to prolong the egg-laying period of hens, while simultaneously reducing feed consumption, brooding and rearing time, heating costs, and labor costs, thereby improving the production efficiency of the egg-laying hen industry. However, the extended-laying process is often accompanied by problems such as low egg production rates, poor eggshell quality, and poor egg white quality. Furthermore, culled hens often fetch low prices due to severe feather loss, and may even be difficult to sell.

[0003] In existing technologies, some egg-laying hen farms have attempted to alleviate related problems during the extended laying period by adding nutritional additives to the feed to improve its nutritional level. However, these measures still cannot solve the problems of poor nutrient digestion and absorption and decreased egg production capacity caused by the aging of hens during the extended laying period. Instead, they further increase feed consumption during the egg-laying hen farming process, which to some extent increases the production costs of egg-laying hen farms and reduces economic benefits. Summary of the Invention

[0004] In view of the problems existing in the prior art, such as low egg production rate, poor eggshell quality, poor egg white quality, poor nutrient digestion and absorption and decreased egg production capacity due to the aging of laying hens, the present invention provides a method for raising laying hens during the extended laying period.

[0005] The specific technical solution of the present invention is as follows:

[0006] This invention provides a method for raising extended-laying hens, the method comprising: S1, adjusting the lighting time to a first duration, stopping feeding the extended-laying hens, and ensuring the hens have free access to water; S2, resuming feeding the hens after they reach a preset weight loss rate; S3, feeding the hens with a compound diet after they reach a first egg production rate, the compound diet comprising predigested feed components and standard feed components, the predigested feed components being formed by a synergistic reaction of bacteria and enzymes in the feed, and the standard feed components comprising soybean meal, corn, wheat bran, and limestone powder.

[0007] In a possible implementation, the predigested feed component constitutes 15-20% of the compound diet.

[0008] In a possible implementation, prior to step S1, the feeding method further includes: S01, feeding the laying hens a first diet, wherein the calcium content of the first diet is 5-7%.

[0009] In a possible implementation, step S2 further includes: increasing the quality of the feed given to the laying hens daily, and increasing the calcium content ratio of the feed accordingly.

[0010] In a possible implementation, step S2 further includes feeding the laying hens a diet of 20-130g / day, wherein the diet contains 1-6% calcium.

[0011] In a possible implementation, after step S2, the feeding method further includes: S21, after the laying hen reaches the second egg production rate, adjusting the lighting time to the second duration; S22, feeding the laying hen a second diet, the second diet including cod liver oil.

[0012] In a possible implementation, the second egg production rate is 15-25%;

[0013] In a possible implementation, the second duration is 15-17 hours per day;

[0014] In a possible implementation, the calcium content of the second diet is 3-5%.

[0015] In a possible implementation, after step S3, the feeding method further includes: S4, after the laying hens have entered the peak egg production period for a preset time, feeding the laying hens a third diet, wherein the proportion of soybean meal in the third diet is lower than the proportion of soybean meal in the compound diet, and the proportions of corn, bran and limestone in the compound diet are higher than the proportions of corn, bran and limestone in the third diet.

[0016] In a possible implementation, the first duration is 7-9 hours per day;

[0017] In a possible implementation, the preset weight loss rate is 25-35%;

[0018] In a possible implementation, the first egg production rate is 75-85%.

[0019] In a possible implementation, the laying hens are 480 to 540 days old.

[0020] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0021] 1. By forcibly resting laying hens during their extended laying period, the L value of eggshell color can be significantly reduced while the a value increases, thereby improving the brightness and color uniformity of the eggshell and reducing the proportion of light-shelled eggs. Using pre-digested feed components containing synergistic bacterial and enzyme reactions can improve the absorption and utilization rate of nutrients in the laying hen's intestines, reduce the possibility of inflammation in the oviduct and uterus, thus improving egg white quality, eggshell quality, and reducing the rate of blood spots and meat spots. It can also replace some expensive feed ingredients, reducing the feeding cost of laying hens. The extended laying hen feeding method of this invention can increase the average daily egg production and feed absorption and utilization rate of laying hens, improve the health of aging laying hens, increase eggshell membrane thickness to reduce moisture loss and bacterial contamination, increase albumen viscosity to improve egg white quality, extend the shelf life of finished eggs, and improve the economic benefits of laying hen farming enterprises.

[0022] 2. During the extended laying period, adding calcium-containing ingredients to the laying hen feed can supplement calcium for the hens, reduce the egg breakage rate, and reduce the incidence of osteoporosis in laying hens. Adding cod liver oil to the laying hen feed can promote the digestion and absorption of nutrients such as calcium and phosphorus in the feed, improve utilization, and reduce calcium and phosphorus emissions during the laying hen farming process.

[0023] 3. In the process of raising laying hens during the extended laying period, adding a step to test the strength and toughness of the eggshell can reduce the breakage rate during egg collection and transportation, reduce the loss of finished eggs, and improve the economic benefits of laying hen farming enterprises.

[0024] 4. The extended-term laying hen feeding method of the present invention can also improve the utilization rate of chicken house equipment in laying hen farms, reduce feed consumption and feed waste, and significantly improve the feather coverage of laying hens, thereby increasing the selling price of culled laying hens and further improving the economic benefits of laying hen farms. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] For the terms defined below, unless a different definition is given elsewhere in the claims or specification, these definitions shall apply. All numerical values, whether or not explicitly indicated, are defined herein as being modified by the term "about". The term "about" generally refers to a range of numerical values ​​that a person skilled in the art would consider equivalent to the stated values ​​to produce substantially the same properties, functions, results, etc. A range of numerical values ​​indicated by a low value and a high value is defined as encompassing all numerical values ​​included within this range and all subranges included within this range.

[0027] It should be noted that the terms "comprising," "having," and any variations thereof in the specification, claims, and above-described embodiments of this invention are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0028] The following description of the embodiments of the present invention is provided in conjunction with the solution, and the solution does not limit the disclosure of the claims in any way.

[0029] This application provides a method for raising extended-laying hens, the method comprising: S1, adjusting the lighting time to a first duration, stopping feeding the extended-laying hens, and ensuring the hens have free access to water; S2, resuming feeding the hens after they reach a preset weight loss rate; S3, feeding the hens with a compound diet after they reach a first laying rate, the compound diet comprising predigested feed components and standard feed components, the predigested feed components being formed by a synergistic reaction of bacteria and enzymes in the feed, and the standard feed components comprising soybean meal, corn, wheat bran, and limestone powder.

[0030] Specifically, after the extended-laying hens enter their formal rest period, firstly, the lighting time is adjusted to the first duration, and feeding of the hens is stopped, but the hens are allowed free access to water. Next, after the hens reach the preset weight loss rate, the extended-laying hens enter the rest recovery period and are fed again. Then, after the hens reach the first laying rate, at least part of the feed is replaced with pre-digested feed components formed by the synergistic reaction of bacteria and enzymes to prepare a compound feed. The compound feed is then used to feed the hens. The standard feed components before replacement include soybean meal, corn, wheat bran, and limestone.

[0031] Thus, forcing laying hens to rest during their extended laying period can significantly reduce the L value (lightness index) and increase the a value (color index) of eggshell color, thereby improving eggshell brightness and color uniformity, and reducing the proportion of light-shelled eggs. Using pre-digested feed components containing synergistic microbial enzymes can improve the absorption and utilization of nutrients in the laying hen's intestines, reduce the likelihood of inflammation in the oviduct and uterus, thereby improving egg white quality, eggshell quality, and reducing the rate of blood spots and meat spots. It can also replace some expensive feed ingredients such as corn and soybean meal. This invention reduces the feeding costs of laying hens. The extended-term laying hen feeding method of this invention can increase the average daily egg production and feed absorption and utilization rate of laying hens, improve the health of aging laying hens, increase the thickness of the eggshell membrane to reduce moisture loss and bacterial contamination, increase albumen viscosity to improve egg white quality, extend the shelf life of finished eggs, and improve the economic benefits of laying hen farming enterprises. Furthermore, adding calcium-containing limestone powder to the laying hen feed to supplement calcium can reduce the egg breakage rate and decrease the incidence of osteoporosis in laying hens.

[0032] Preferably, the synergistic reaction time of the pre-digested feed components with microorganisms and enzymes is 2 to 4 days.

[0033] Preferably, the predigested feed components include tofu residue, wheat bran, limestone powder, Sichuan pepper seeds, and kitchen waste.

[0034] Preferably, the predigested feed composition is 57.5% tofu residue, 10% wheat bran, 10% limestone powder, 12.5% ​​Sichuan pepper seeds, and 10% kitchen waste.

[0035] Preferably, the weight loss rate of laying hens is obtained by weighing. Specifically, on the first day after the extended-laying period ends and the laying hens enter their formal rest period, several cages of laying hens in different locations in the chicken house are selected as weighing samples. The location of the cages to which the laying hens belong is recorded, and each laying hen is weighed. The weight of each cage of laying hens is recorded as the initial standard weight, and the average weight is calculated. Subsequently, on the third and seventh days, the laying hens are weighed again, and the weight of the laying hens in each cage of the weighing sample selected on the first day is recorded. The average weight is calculated, and the weight loss rate of the laying hens is obtained.

[0036] Preferably, there are no fewer than 5 different locations in the chicken coop.

[0037] Preferably, the number of laying hens in the selected weighing sample cage is 1 to 10% of the total number of chickens in the flock.

[0038] Preferably, the weight loss rate of laying hens typically reaches 20% on day 7.

[0039] Preferably, the laying hens are weighed daily after the weight loss rate reaches 20%.

[0040] Preferably, the time for weighing the laying hens is a fixed period, such as weighing all the laying hens at 9:00.

[0041] Preferably, the formal rest period for extended-laying hens is usually 10 to 14 days. If the preset weight loss rate is not achieved, the rest period can be extended.

[0042] Preferably, once the weight loss rate of the laying hens reaches 27%, the condition of the laying hens is observed. If the mortality rate of the laying hens increases, feeding is resumed, and the lighting time is increased by 1 hour per day.

[0043] Preferably, after the extended laying hens enter the formal rest period, a management method of "only leaving and not entering" is implemented for the laying hens in the weighing sample cage. That is, if a laying hen dies, the dead laying hen is removed from the weighing sample cage and weighed, and the reduced number of laying hens is not added back to the weighing sample cage.

[0044] Preferably, if the weight of the eggs is greater than 66-67g, the nutritional level of the standard feed components in the diet should be adjusted.

[0045] Preferably, the feeding method also includes a step of increasing the transverse strength and toughness of the eggshell to reduce the breakage rate during egg collection and transportation, reduce the loss of finished eggs, and improve the economic benefits of egg-laying hen farming enterprises.

[0046] In some embodiments, the predigested feed components comprise 15-20% of the compound diet.

[0047] Specifically, the predigested feed component can be any value between 15% and 20%, for example, 15%, 16%, 17%, 18%, 19%, 20%, etc. 15% to 20% of the feed is replaced with the predigested feed component formed through a synergistic reaction of bacteria and enzymes to prepare a compound feed, which is then used to feed laying hens.

[0048] In some embodiments, before step S1, the feeding method further includes: S01, feeding the laying hens a first diet, the first diet having a calcium content of 5-7%.

[0049] Specifically, the calcium content of the first diet is any value between 5% and 7%, for example, it can be 5%, 6%, 7%, etc.

[0050] Thus, feeding laying hens a first diet with a certain calcium content during the rest preparation period before they enter the formal rest period can reduce the egg breakage rate during the rest preparation period and reduce the occurrence of osteoporosis in laying hens.

[0051] Preferably, the first feed should be started on the laying hens 3 to 4 days before they enter their formal rest period.

[0052] Preferably, limestone powder is added to the first diet to ensure the calcium content of the first diet.

[0053] Preferably, the amount of limestone added is 11%, so that the calcium content of the first diet is 5.2%.

[0054] Preferably, after the extended-laying hens enter the resting preparation period, hens that are too light or too heavy, have incomplete feather coverage, or are sick, weak, or injured should be culled to ensure that the flock uniformity reaches more than 85%. In this way, by screening the hens during the extended-laying preparation period, the mortality and culling rate of the hens during the formal resting period can be reduced.

[0055] Preferably, during the extended laying period when the laying hens are preparing for laying, they are simultaneously immunized.

[0056] Preferably, the immunization treatment involves diluting the new bronchitis bivalent vaccine with twice the amount of water and then administering it to the laying hens through drinking water.

[0057] In some embodiments, step S2 further includes: increasing the quality of the feed for laying hens daily, and increasing the proportion of calcium in the feed accordingly.

[0058] In some embodiments, step S2 further includes feeding the laying hens a diet of 20-130g / day with a calcium content of 1-6%.

[0059] Specifically, the feed weight for laying hens can be any value between 20 and 130 g / day. For example, it can be 20 g / day, 30 g / day, 40 g / day, 50 g / day, 60 g / day, 70 g / day, 80 g / day, 90 g / day, 100 g / day, 110 g / day, 120 g / day, 130 g / day, etc.

[0060] Therefore, gradually increasing feeding during the recovery period of laying hens after the extended laying period can alleviate the metabolic burden on the liver, intestines and other organs of the laying hens caused by the resumption of feeding.

[0061] Preferably, after the extended-laying hens enter the recovery period, on the first day, each hen is fed 25-35g of feed at 8:00 AM. On the second day, each hen is fed a total of 50-55g of feed at 8:00 AM and 4:00 PM. Starting from the third day, the feed amount per hen is increased by 10-15g / day until it reaches 120-125g / day on the seventh day, which is the daily feed amount for the hens to resume laying. Simultaneously, the amount of limestone added to the feed is 1% on the first day, 2% on days 2-4, 3% on days 5-7, 4% from the seventh day until the laying rate reaches 10%, and 6% when the laying rate reaches 10% but not 20%, to increase the calcium content in the feed.

[0062] In some embodiments, after step S2, the feeding method further includes: S21, after the laying hens reach the second egg production rate, adjusting the lighting time to the second duration; S22, feeding the laying hens a second diet, the second diet including cod liver oil.

[0063] Thus, adding cod liver oil to the feed of laying hens during their extended laying period and recovery period can promote the digestion and absorption of nutrients such as calcium and phosphorus in the feed, improve utilization, and reduce calcium and phosphorus emissions during the laying hen farming process.

[0064] Preferably, the second egg production rate is 20%.

[0065] Preferably, after the laying hens reach the second egg production rate, the lighting time is adjusted to a second duration of 10 hours / day, and then the lighting duration is increased by 0.5 hours / day each day until it reaches 16 hours / day.

[0066] Preferably, the amount of limestone added to the second diet is 8%, so that the calcium content of the second diet is 3.8%.

[0067] Preferably, the amount of cod liver oil added to the second diet is 250g / t.

[0068] In some embodiments, the second egg production rate is 15-25%;

[0069] Specifically, the second egg production rate can be any value between 15% and 25%, for example, it can be 15%, 20%, 25%, etc.

[0070] In some embodiments, the second duration is 15–17 hours per day;

[0071] Specifically, the second duration can be any value between 15 and 17 hours per day. For example, it can be 15 hours per day, 16 hours per day, 17 hours per day, etc.

[0072] In some embodiments, the calcium content of the second diet is 3-5%.

[0073] Specifically, the calcium content of the second diet can be any value between 3% and 5%, for example, it can be 3%, 4%, 5%, etc.

[0074] Thus, during the extended laying period and the recovery period of laying hens, adding limestone powder to the laying hen feed can work together with cod liver oil in the feed to promote the digestion and absorption of nutrients such as calcium and phosphorus in the feed, improve utilization, and reduce calcium and phosphorus emissions during the laying hen farming process.

[0075] In some embodiments, after step S3, the feeding method further includes: S4, after the laying hens have entered the peak egg production period for a preset time, feeding the laying hens a third diet, wherein the proportion of soybean meal in the third diet is lower than the proportion of soybean meal in the compound diet, and the proportions of corn, bran and limestone in the compound diet are higher than the proportions of corn, bran and limestone in the third diet.

[0076] Specifically, after the extended-laying hens have entered their peak egg production period for a predetermined duration, the proportion of soybean meal in the standard feed components of the compound feed is reduced, while the proportions of corn, bran, and limestone are increased to prepare a third feed for feeding the laying hens.

[0077] Therefore, adjusting the feed formula for extended-laying hens during their peak egg production period to the above-mentioned components can effectively control the stability of egg quality in the later stages of egg production and reduce the rate of broken eggs.

[0078] Preferably, the preset duration is 3 to 5 months.

[0079] Preferably, the proportion of soybean meal in the standard feed components of the compound feed is reduced by 20%, the proportion of corn is increased by 2%, the proportion of wheat bran is increased by 2%, and the proportion of limestone powder is increased by 1%.

[0080] In some embodiments, the first duration is 7–9 hours per day;

[0081] Specifically, the first duration can be any value between 7 and 9 hours per day; for example, it can be 7 hours per day, 8 hours per day, 9 hours per day, etc. After the extended laying hens enter the formal rest period, the lighting time should first be adjusted to 7 to 9 hours per day.

[0082] Preferably, the first duration is 8 hours per day.

[0083] Preferably, lighting is provided to laying hens in the extended laying period between 8:00 and 16:00.

[0084] In some embodiments, the preset weight loss rate is 25-35%;

[0085] Specifically, the preset weight loss rate can be any value between 25% and 35%, for example, it can be 25%, 30%, 35%, etc. After the weight loss rate of the laying hens reaches 25% to 35%, the extended-laying hens enter a rest and recovery period and are fed again.

[0086] Preferably, the preset weight loss rate is 30%.

[0087] In some embodiments, the initial egg production rate is 75-85%.

[0088] Specifically, the first egg production rate can be any value between 75% and 85%, for example, it can be 75%, 80%, 85%, etc. After the egg production rate of the laying hens reaches 75% to 85%, at least part of the feed is replaced with predigested feed components formed by the synergistic reaction of bacteria and enzymes to prepare a compound feed.

[0089] Preferably, the first egg production rate is 80%.

[0090] In some embodiments, the laying hens are 480–540 days old.

[0091] Specifically, the laying hen can be any value between 480 and 450 days old. For example, it can be 480 days old, 500 days old, 520 days old, 540 days old, etc.

[0092] Preferably, the laying hens are 500 days old.

[0093] The implementation effects of the technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0094] Example 1

[0095] This embodiment provides a method for raising laying hens during the extended laying period, the specific method of which is as follows:

[0096] a. Preparatory period for maternity leave:

[0097] Eighty-eight thousand Hy-Line Brown hens aged 520 days were selected for extended laying period. Five days before the official rest period, hens that were underweight or overweight, had incomplete feather coverage, or were sick, weak, or injured were removed to ensure that the flock uniformity of laying hens reached more than 85%.

[0098] Four days before the official off-season, the laying hens were immunized by drinking water with a Newcastle disease bivalent vaccine diluted with twice the amount of water.

[0099] Three days before the official off-season, the laying hens were fed a diet with 11% limestone powder and 5.2% calcium.

[0100] b. Formal maternity leave period:

[0101] On the first day of the extended-laying period's official rest period for laying hens, the lighting period was adjusted to 8:00-16:00, a total of 8 hours / day. Feeding of the extended-laying hens was stopped, but they were provided with free access to water. Ten hours after feeding was stopped, laying hens in six sampling cages were selected at the southeast (1 sampling point), southwest (1 sampling point), northwest (1 sampling point), northeast (1 sampling point), and center (2 sampling points) of the chicken house. These samples were used as the initial standard weight for the laying hens. Each sampling point selected five consecutive cages, with four laying hens in each cage. On the 3rd, 7th, and 10th days, the laying hens in the sampling cages were weighed again, and the weight loss rate was calculated. After the 10th day, the laying hens in the sampling cages were weighed daily, and the weight loss rate was calculated.

[0102] c. Postpartum recovery period:

[0103] Once the weight loss rate of laying hens reaches 30%, they enter the extended laying period and recovery period. On the first day of the recovery period, the feed intake of each laying hen is restored to 30g / day. Afterward, the feed intake is increased by 15g / day per hen. After one week, the feed intake is restored to the normal intake of laying hens, approximately 120g / day, and then the feed intake is kept constant. Specifically, the feed intake is 45g / day on the second day, 60g / day on the third day, 75g / day on the fourth day, 90g / day on the fifth day, 105g / day on the sixth day, and so on until the seventh day when it is increased to 120g / day, after which the feed intake remains unchanged. Specifically, the amount of limestone added to the feed is 1% on day 1, 2% on days 2-4, 3% on days 5-7, 4% from day 7 until the egg production rate reaches 10%, and 6% when the egg production rate reaches 10% but not 20%.

[0104] Once the laying hens reach a 20% egg production rate, increase the lighting duration to 10 hours per day, then gradually increase it by 0.5 hours per day until it reaches 16 hours per day. Simultaneously, add 8% limestone powder to the feed and cod liver oil at a ratio of 250g / t.

[0105] Once the laying hens reach an egg production rate of 80%, they are fed a compound diet. This compound diet consists of 15% pre-digested feed components formed through a 3-day synergistic reaction of bacteria and enzymes, and 85% standard feed components. Specifically, the pre-digested feed components include 57.5% tofu residue, 10% wheat bran, 10% limestone powder, 12.5% ​​Sichuan pepper seeds, and 10% kitchen waste. The standard feed components include soybean meal, corn, wheat bran, and limestone powder, as well as soybean oil, salt, choline, dicalcium phosphate, and vitamins.

[0106] Four months after the laying hens reach their peak egg production, the proportion of soybean meal in the standard feed components of the compound diet is reduced by 20%, the proportion of corn is increased by 2%, the proportion of wheat bran is increased by 2%, and the proportion of limestone powder is increased by 1%.

[0107] This application also provides a series of embodiments to further verify the implementation effect of the extended-laying hen breeding method of the present invention. The implementation effect of the present invention is described in detail below with reference to specific embodiments.

[0108] Example 2

[0109] This embodiment selected 500-day-old Hy-Line Brown laying hens from three chicken houses (A, B, and C) as samples. The three groups of hens underwent the same feeding and management before the rest period and had similar production performance. Specifically, the hens in house A served as control group 1 and did not undergo a rest period; the hens in house B served as control group 2, where no selection was performed during the rest period preparation period, and water and feed were simultaneously withheld during the formal rest period; and the hens in house C served as the experimental group, using the extended-laying period feeding method based on Example 1. Referring to Table 1, the specific experimental results are compared below:

[0110] Table 1. Comparison of production performance and economic benefits of laying hens with extended rearing period of 720 days.

[0111]

[0112] Therefore, in terms of production performance, the extended-laying hen rearing method provided by this invention can significantly improve the egg production rate of extended-laying hens, prolong the duration of the peak egg production period after the resting period, and also significantly reduce the mortality rate of extended-laying hens. Furthermore, in terms of economic benefits, the extended-laying hen rearing method provided by this invention can increase the profits of egg-laying hen farms from selling culled hens, reduce the feed conversion ratio during the rearing process, improve feed utilization of laying hens, save production costs, and enhance economic efficiency.

[0113] Example 3

[0114] This embodiment selected 10,000 Hy-Line Brown laying hens aged 500 days as a sample. Based on the extended-laying hen rearing method of Example 1, production performance data were collected when the hens were at their peak laying period before the resting period and when they reached their peak laying period again after the resting period. Feather integrity was scored for 100 hens located in different cages in the henhouse. Simultaneously, 120 eggs produced by the hens at their peak laying period before the resting period and 120 eggs produced by the hens at their peak laying period after the resting period were collected, and egg quality data were measured. Referring to Tables 2 and 3, the specific experimental results are compared below:

[0115] Table 2 Comparison of laying performance and feather integrity scores before and after the laying rest period in laying hens.

[0116]

[0117] Note: 1 Feather integrity scoring reference: Wang Qiang, Tong Haibing, Shao Dan, Shi Shourong. A preliminary study on the quality scoring system of welfare for caged laying hens. China Poultry, 2015, 12: 58-61.

[0118] Therefore, in terms of production performance and feather integrity score, the extended-laying hen feeding method provided by this invention can improve the egg production rate and daily egg production of extended-laying hens when they reach their peak laying period again after a resting period, while reducing the broken egg rate and feed conversion ratio, improving feed utilization, saving production costs, and enhancing economic benefits. Furthermore, it can also improve the feather integrity score of extended-laying hens, thereby increasing the profits of egg-laying hen farms from selling culled hens.

[0119] Table 3 Comparison of egg quality before and after the laying hen's rest period

[0120]

[0121]

[0122] Therefore, in terms of egg quality, the extended-laying hen breeding method provided by this invention can improve the brightness and uniformity of eggshell color when the extended-laying hens reach their peak laying period again after the resting period. The transverse eggshell strength, eggshell thickness, and eggshell toughness are also significantly improved, which can reduce the breakage rate during egg collection and transportation, reduce the loss of finished eggs. At the same time, the increase in eggshell membrane thickness and Haugh units, and the reduction in blood spots and meat spots can effectively extend the shelf life of finished eggs and improve the economic benefits of egg-laying hen breeding enterprises.

[0123] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0124] It should be noted that all features described in this invention (including technical features described in different embodiments) can be combined arbitrarily under reasonable circumstances, and the new technical solutions formed by such combinations are all within the protection scope of this invention.

[0125] The above description is merely some embodiments of the present invention and is not intended to limit the present invention. Those skilled in the art should understand that the present invention can have various changes and improvements, and any modifications, equivalent substitutions and improvements made in accordance with the present invention fall within the protection scope claimed by the present invention.

Claims

1. A method for raising extended-lay hens, characterized by, The feeding method includes: S1, adjust the lighting time to the first duration, stop feeding the extended-laying hens, and ensure that the hens have free access to water; S2, Once the laying hens have reached the preset weight loss rate, resume feeding the laying hens; S3. After the laying hens reach the first laying rate, the laying hens are fed a compound diet. The compound diet includes pre-digested feed components and standard feed components. The pre-digested feed components are formed by a synergistic reaction of bacteria and enzymes in the feed. The standard feed components include soybean meal, corn, wheat bran, and limestone powder. The predigested feed components include tofu residue, wheat bran, limestone powder, pepper seeds, and kitchen waste; The preset weight loss rate is 25-35%; The first egg production rate is 75-85%; Step S2 further includes: increasing the quality of the feed for the laying hens daily, and increasing the calcium content ratio of the feed accordingly; The first duration is 7~9 hours / day; Once the weight loss rate of laying hens reaches 25-35%, the extended-laying period hens enter a rest and recovery period. After the extended-laying hens enter the recovery period, on the first day, each hen is fed 25-35g of feed at 8:00 AM. On the second day, each hen is fed a total of 50-55g of feed at 8:00 AM and 4:00 PM. Starting from the third day, the feed amount for each hen is increased by 10-15g / day until it reaches 120-125g / day on the seventh day, which is the daily feed amount for the hens to resume laying. At the same time, the amount of limestone powder added to the feed is 1% on the first day, 2% on the second to fourth days, 3% on the fifth to seventh days, 4% from the seventh day until the laying rate reaches 10%, and 6% when the laying rate reaches 10% but not 20%, in order to increase the calcium content in the feed. Once the laying hens reach the second laying rate, adjust the lighting duration to 10 hours / day. Then, increase the lighting duration by 0.5 hours / day each day until it reaches 16 hours / day. At the same time, add 8% limestone powder to the feed and add cod liver oil to the feed at a ratio of 250g / t. The second laying rate is 15-25%; Following step S2, the feeding method further includes: S21, After the laying hen reaches the second egg production rate, adjust the lighting time to the second duration; S22, feeding the laying hens a second diet, the second diet including cod liver oil; After step S3, the feeding method further includes: S4. After the laying hens have reached their peak egg production period for a preset time, the laying hens are fed a third diet. The proportion of soybean meal in the third diet is lower than that in the compound diet, and the proportions of corn, bran, and limestone in the compound diet are higher than those in the third diet.

2. The rearing method according to claim 1, characterized by, The predigested feed components constitute 15-20% of the compound diet.

3. The rearing method according to claim 1, characterized by, Prior to step S1, the feeding method further includes: S01, the laying hens are fed a first diet, the first diet having a calcium content of 5-7%.

4. The rearing method according to claim 1, characterized by, Step S2 further includes feeding the laying hens a diet of 20-130g / day, with a calcium content of 1-6%.

5. The rearing method according to claim 1, characterized by, The feeding method satisfies at least one of the following characteristics: The second laying rate is 15-25%; The second duration is 15-17 hours per day; The calcium content of the second diet is 3-5%.

6. The rearing method according to any one of claims 1 to 4, characterized in that, The feeding method satisfies at least one of the following characteristics: The first duration is 7~9 hours / day; The preset weight loss rate is 25-35%; The first egg production rate is 75-85%.

7. The rearing method according to any one of claims 1 to 4, characterized in that, The laying hens are 480-540 days old.

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