Method for improving production performance of Wenchang chicken

Abstract

The invention discloses a method for improving the production performance of Wenchang chickens, and belongs to the technical field of poultry breeding. Adding areca nut leavening into the feed, and performing limited cage rearing on the Wenchang chickens at the age of 80-100 days in the big chicken period until the Wenchang chickens are 120 days old; mixing the crushed fresh betel nuts with water to prepare a fermentation stock solution; the preparation method comprises the following steps: preparing 1-2 * 10 < 9 > CFU / mL of bacillus subtilis and lactobacillus plantarum into 1-2 * 10 < 9 > CFU / mL of bacterial liquid respectively, inoculating the bacterial liquid into the fermentation stock solution respectively for fermentation, filtering the fermentation liquid after fermentation is finished, performing sterilization treatment, and concentrating and drying the sterilized fermentation liquid to obtain the areca nut fermentation product. According to the method, the feed conversion ratio of the Wenchang chicken in the big chicken period is reduced and the production performance of the Wenchang chicken is improved by limiting the proper limited cage culture day age and feeding times in the big chicken period of the Wenchang chicken and adding the areca nut fermentation product.

Description

Technical Field

[0001] The present invention belongs to the technical field of poultry farming, and specifically relates to a method for improving the production performance of Wenchang chickens. Background Art

[0002] The feed conversion ratio is an important indicator for evaluating the production performance of white - feather broilers. With the rapid development of the large - scale and intensive farming of Wenchang chickens, commercial feed has become the main feed source and one of the main breeding costs. Currently, the shortage of raw materials for commercial feed and the continuous increase in prices have led to a continuous rise in the price of commercial feed, seriously increasing the breeding cost. Therefore, the efficient utilization of existing commercial feed and the reduction of the feed conversion ratio are crucial for the production of Wenchang chickens. At present, restricted cage - raising has improved the production efficiency of Wenchang chickens, and the feeding technology plays a key role in reducing the feed conversion ratio of Wenchang chickens. However, there are few reports on using the feed conversion ratio to guide the production and breeding of Wenchang chickens.

[0003] Therefore, it is of great significance to study a feeding method for Wenchang chickens with a low feed conversion ratio. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a method for improving the production performance of Wenchang chickens. By feeding the feed added with betel nut ferment, and selecting Wenchang chicken hens at 80 - 100 days old in the large - chicken stage for restricted cage - raising, the feed conversion ratio of Wenchang chickens can be reduced, and ideal slaughter performance can be obtained.

[0005] The present invention is achieved through the following technical solutions: A method for improving the production performance of Wenchang chickens, adding betel nut ferment to the feed, and carrying out restricted cage - raising on Wenchang chickens at 80 - 100 days old in the large - chicken stage until 120 days old; The preparation method of the betel nut ferment is as follows: (1) Mix fresh betel nut powder with water to obtain a fermentation stock solution; (2) Prepare Bacillus subtilis and Lactobacillus plantarum into bacterial solutions of 1 - 2×10 9 CFU / mL respectively, inoculate the bacterial solutions into the fermentation stock solution for fermentation respectively. After the fermentation is completed, filter the fermentation broth and carry out sterilization treatment. The sterilized fermentation broth is concentrated and dried to obtain betel nut ferment.

[0006] Furthermore, the addition amount of the betel nut ferment is 0.005 - 0.015% of the feed quality.

[0007] Furthermore, the Wenchang chickens are Wenchang chickens at 85 days old in the large - chicken stage, and are restricted cage - raised until 120 days old, with 3 chickens in each cage.

[0008] Furthermore, the number of times of feed feeding during the restricted cage - raising period is 1 - 3 times per day.

[0009] Further, during the restricted cage rearing period, the natural light brightness is provided during the day, and supplementary lighting is provided by turning on the lights at night for large-scale and intensive farming.

[0010] Further, in step (1), the mass ratio of the fresh betel nut powder to water is 1:3 - 6.

[0011] Further, in step (2), Bacillus subtilis and Lactobacillus plantarum are inoculated into the fermentation stock solution, and 1 mL of the Bacillus subtilis and Lactobacillus plantarum bacterial solutions are inoculated per liter of the fermentation stock solution.

[0012] Further, in step (2), the fermentation temperature is 35 - 37 °C, and the fermentation time is 48 - 72 h.

[0013] Further, the fermented betel nut product is diluted with water and then mixed evenly with the feed.

[0014] Further, in the feed, the crude protein ≥ 17.5%, crude fiber ≤ 5.0%, crude ash ≤ 8.0%, calcium 0.40 - 1.40%, total phosphorus 0.40 - 0.90%, sodium chloride 0.20 - 0.80%, lysine ≥ 0.88%, methionine ≥ 0.38%, all in mass percentage.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, the appropriate restricted cage rearing age, feeding frequency, and addition of the fermented betel nut product during the late growth stage of Wenchang chickens have reduced the feed-to-meat ratio of Wenchang chickens at the late growth stage to varying degrees and improved the production performance of Wenchang chickens. Restricted cage rearing of Wenchang chickens within 80 - 90 days of the late growth stage has obtained a lower feed-to-meat ratio at the late growth stage of Wenchang chickens; feeding commercial feed 3 times a day during the restricted cage rearing period can significantly reduce the feed-to-meat ratio, indicating that "eating small meals frequently" can improve the feed utilization rate during the restricted cage rearing period of Wenchang chickens at the late growth stage; on the basis of feeding commercial feed 3 times a day during the restricted cage rearing period, adding 0.1% of the fermented betel nut product can further reduce the feed-to-meat ratio during the restricted cage rearing period of Wenchang chickens at the late growth stage and further improve the feed utilization rate. Among them, Wenchang chickens restricted cage reared from 85 days old to 120 days old, fed commercial feed 3 times a day, and added 0.1% of the freeze-dried powder of the fermented betel nut product to obtain the best feed-to-meat ratio, which is only 4.4:1, that is, 4.4 parts of commercial feed can obtain a 1-part increase in the body weight of Wenchang chickens. Detailed Embodiments

[0016] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. The experimental methods without specific conditions noted in the following embodiments are usually carried out according to conventional conditions or according to the conditions recommended by the manufacturers.

[0017] The feed in the following examples is commercial feed. The crude protein in the feed is 17.5%, the crude fiber is 5.0%, the crude ash is 8.0%, the calcium is 1.2%, the total phosphorus is 0.80%, the sodium chloride is 0.60%, the lysine is 0.9%, and the methionine is 0.4%, all of which are mass percentages.

[0018] In the following examples, the preparation method of the betel nut fermentate is as follows: Wash the fresh betel nuts clean and crush them evenly to obtain a fresh betel nut crush. Mix them evenly according to the ratio of 1 part of the fresh betel nut crush to 5 parts of water to obtain a fermentation stock solution. Prepare the Bacillus subtilis and Lactobacillus plantarum into bacterial solutions of 1×10 9 CFU / mL respectively. Inoculate 10 mL of the Bacillus subtilis bacterial solution and 10 mL of the Lactobacillus plantarum bacterial solution into 10 L of the fermentation stock solution at the same time. Under the condition of a temperature of 35 - 37 °C, oscillate and ferment for 72 hours. After the fermentation is completed, filter the fermentation broth and sterilize it. Concentrate and freeze-dry the filtered and sterilized fermentation broth to obtain the betel nut fermentate.

[0019] Example 1 Feeding feed: The above-mentioned commercial feed without adding betel nut fermentate; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the restricted cage rearing process, the natural light brightness is maintained during the day, and light is supplemented by turning on the lights at night. Keep the temperature in the chicken house suitable (the chicken flock does not have large-scale, long-term rapid open-mouth breathing, wing stretching for heat dissipation, or huddling together). Conduct large-scale and intensive farming, and restrict feeding until 120 days old.

[0020] Example 2 Feeding feed: The above-mentioned commercial feed without adding betel nut fermentate; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the restricted cage rearing process, the natural light brightness is maintained during the day, and light is supplemented by turning on the lights at night. Keep the temperature in the chicken house suitable (the chicken flock does not have large-scale, long-term rapid open-mouth breathing, wing stretching for heat dissipation, or huddling together). Conduct large-scale and intensive farming, and restrict feeding until 120 days old.

[0021] Example 3 Feeding feed: The above-mentioned commercial feed without adding betel nut fermentate; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the restricted cage rearing process, the natural light brightness is maintained during the day, and light is supplemented by turning on the lights at night. Keep the temperature in the chicken house suitable (the chicken flock does not have large-scale, long-term rapid open-mouth breathing, wing stretching for heat dissipation, or huddling together). Conduct large-scale and intensive farming, and restrict feeding until 120 days old.

[0022] Example 4 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0023] Example 5 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0024] Example 6 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0025] Example 7 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0026] Example 8 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0027] Example 9 Feeding feed: The above commercial feed, without adding betel nut ferment; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0028] Example 10 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens, and they are fed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0029] Example 11 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens, and they are fed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0030] Example 12 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens, and they are fed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0031] Example 13 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens, and they are fed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0032] Example 14 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens, and they are fed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0033] Example 15 Feeding feed: The above-mentioned commercial feed without adding betel nut ferment The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens, and they are fed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary light is provided by turning on the lights at night. The appropriate temperature of the chicken house is maintained, and large-scale and intensive farming is carried out. The restricted feeding is carried out until 120 days old.

[0034] Example 16 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment. The addition method is as follows: 1 g of betel nut ferment is added to each kilogram of commercial feed. The freeze-dried powder of 1 g of betel nut ferment is diluted with 50 mL of pure water and evenly mixed with the commercial feed; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0035] Example 17 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0036] Example 18 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 80 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0037] Example 19 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0038] Example 20 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house and carry out large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0039] Example 21 Feeding feed: The above commercial feed is added with 0.1% betel nut ferment, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 85 days old in the large chicken stage of Wenchang chickens. They are fed 3 times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0040] Example 22 Feeding feed: The above-mentioned commercial feed, with 0.1% betel nut ferment added. The adding method is the same as that in Example 16; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. They are fed 1 time a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0041] Example 23 Feeding feed: The above-mentioned commercial feed, with 0.1% betel nut ferment added. The adding method is the same as that in Example 16; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. They are fed 2 times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0042] Example 24 Feeding feed: The above-mentioned commercial feed, with 0.1% betel nut ferment added. The adding method is the same as that in Example 16; The starting age of restricted cage rearing is 90 days old in the large chicken stage of Wenchang chickens. They are fed 3 times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0043] Example 25 Feeding feed: The above-mentioned commercial feed, with 0.1% betel nut ferment added. The adding method is the same as that in Example 16; The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens. They are fed 1 time a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0044] Example 26 Feeding feed: The above-mentioned commercial feed, with 0.1% betel nut ferment added. The adding method is the same as that in Example 16; The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens. They are fed 2 times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. The temperature in the chicken house is kept suitable for scale and intensive farming, and restricted feeding is carried out until 120 days old.

[0045] Example 27 Feeding diet: The above commercial feed, with 0.1% betel nut ferment added, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 95 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and conduct large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0046] Example 28 Feeding diet: The above commercial feed, with 0.1% betel nut ferment added, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens. Feed once a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and conduct large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0047] Example 29 Feeding diet: The above commercial feed, with 0.1% betel nut ferment added, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens. Feed twice a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and conduct large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0048] Example 30 Feeding diet: The above commercial feed, with 0.1% betel nut ferment added, and the addition method is the same as that in Example 16; The starting age of restricted cage rearing is 100 days old in the large chicken stage of Wenchang chickens. Feed three times a day. During the process of restricted cage rearing, the natural light brightness is maintained during the day, and supplementary lighting is provided by turning on the lights at night. Keep the appropriate temperature in the chicken house, and conduct large-scale and intensive farming. Restrictive feeding is carried out until 120 days old.

[0049] Experimental Example 1. Experimental design and feeding management Select a total of 540 Wenchang chickens (hens) of the same breed, the same batch, and different ages (80, 85, 90, 95, 100 days old), divided into 30 treatments, with 3 replicates for each treatment and 6 Wenchang chickens for each replicate. The feed fed is commercial feed of the same manufacturer and the same model, and is fed in the manner of the above Examples 1 - 10. The daily feed intake per chicken increases with the age, that is, 80 g of feed is fed per chicken per day at 80 days old. The betel nut ferment is provided by the Food College of Hainan University. During the experiment, the average initial weight, average final weight, and total feed intake of the experimental chickens are recorded in units of treatments for statistical analysis of the average weight gain and average feed to meat ratio. The specific grouping is shown in Table 1.

[0050] Table 1 Grouping of experimental examples 2. Determination indexes and methods Calculation of feed conversion ratio: Feed conversion ratio = total feed intake (g) / average weight gain (g).

[0051] For Wenchang chickens fed to 120 days old under each treatment, with 3 replicates for each treatment and 6 Wenchang chickens in each replicate, the slaughter performance was carried out according to NY / T 823-2020 "Nomenclature and measurement statistical methods for poultry production performance", and the average eviscerated yield rate, average pectoral muscle rate, average leg muscle rate and average abdominal fat rate were measured respectively.

[0052] 3. Data processing The data obtained from the experiment were analyzed by variance analysis and multiple comparisons using spss software.

[0053] 4. Results and analysis The average feed conversion ratio and slaughter performance of restricted cage rearing to 120 days old are shown in Table 2 and Table 3 as follows; Table 2 Average feed of each treatment restricted cage rearing to 120 days old Table 3 Slaughter performance of each treatment restricted cage rearing to 120 days old Table 2 shows that for Wenchang chickens in the late growth stage, entering the restricted cage rearing stage earlier significantly reduced the feed conversion ratio; during the restricted cage rearing stage, feeding the daily feed intake of Wenchang chickens in multiple times significantly reduced the feed conversion ratio of Wenchang chickens during the restricted cage rearing stage; on the basis of feeding the daily feed intake in multiple times, adding 0.1% of betel nut fermented product further reduced the feed conversion ratio of Wenchang chickens during the restricted cage rearing stage. Among them, Wenchang chickens restricted cage reared from 85 days old to 120 days old, fed commercial feed 3 times a day and added 0.1% of betel nut fermented product obtained the lowest feed conversion ratio, only 4.4:1, that is, 4.4 parts of commercial feed could obtain a 1 part increase in the weight of Wenchang chickens.

[0054] While paying attention to the feed conversion ratio of Wenchang chickens during the restricted cage rearing stage, the slaughter performance is also one of the important factors affecting the economic benefits of Wenchang chickens. Table 3 shows that compared with other treatments, Wenchang chickens restricted cage reared from 85 days old to 120 days old, fed 3 times a day and added 0.1% of betel nut fermented product, had the highest average eviscerated yield rate, average pectoral muscle rate, average leg muscle rate and the lowest average abdominal fat rate. This further indicates that Wenchang chickens restricted cage reared from 85 days old to 120 days old, fed 3 times a day and added 0.1% of betel nut fermented product can obtain the lowest feed conversion ratio while obtaining a relatively reasonable slaughter performance.

Claims

1. A method for improving the production performance of Wenchang chickens, characterized in that, Add betel nut ferment to the feed, and restrictively cage the Wenchang chickens at 80 - 100 days old in the large - chicken stage until they reach 120 days old. The preparation method of the betel nut ferment is as follows: (1) Mix fresh betel nut powder with water to obtain the fermentation stock solution. (2) Prepare single bacterial solutions of Bacillus subtilis and Lactobacillus plantarum at 1 - 2×10 9 CFU / mL respectively. Inoculate the bacterial solutions into the original fermentation broth for fermentation. After fermentation, filter the fermentation broth and perform sterilization treatment. The sterilized fermentation broth is concentrated and dried to obtain the betel nut ferment.

2. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that, The addition amount of the betel nut ferment is 0.005 - 0.015% of the feed quality.

3. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that, The Wenchang chickens are those at 85 days old in the large - chicken stage, and are restrictively caged until 120 days old, with 3 chickens in each cage.

4. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that The number of times of feeding during the restrictive cage - rearing period is 1 - 3 times a day.

5. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that, During the restrictive cage - rearing period, the natural light brightness is provided during the day, and light is supplemented by turning on the lights at night for large - scale and intensive farming.

6. The method for the production performance of high-quality Wenchang chickens according to claim 1, characterized in that In step (1), the mass ratio of the fresh betel nut powder to water is 1:3 - 6.

7. The method for the production performance of high-quality Wenchang chickens according to claim 1, characterized in that In step (2), Bacillus subtilis and Lactobacillus plantarum are inoculated into the fermentation stock solution, and 1 mL of Bacillus subtilis and 1 mL of Lactobacillus plantarum liquid are inoculated into each liter of the fermentation stock solution simultaneously.

8. The method for the production performance of high Wenchang chickens according to claim 1, wherein In step (2), the temperature for fermentation is 35 - 37 °C, and the fermentation time is 48 - 72 h.

9. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that The betel nut ferment is diluted with water and then mixed evenly with the feed.

10. The method for the production performance of high Wenchang chickens according to claim 1, characterized in that, In the feed, the crude protein ≥ 17.5%, crude fiber ≤ 5.0%, crude ash ≤ 8.0%, calcium 0.40 - 1.40%, total phosphorus 0.40 - 0.90%, sodium chloride 0.20 - 0.80%, lysine ≥ 0.88%, methionine ≥ 0.38%, and these are mass percentages.

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