RU2501307C2 - Egg-laying stimulator of chickens and method of its application - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture, in particular, to poultry industry and stimulating feed additives to increase egg laying of laying chickens in improving the quality of the eggs obtained. The immunomodulator from bursa fabricii of broilers at the age of 35-42 days of life is used as a bio-stimulating agent. The immunomodulator is used daily in liquid form with drinking water in an amount from 5 to 15 mg per 1 kg of body weight of bird for 120 days.

EFFECT: immunomodulator from bursa fabricii of broilers increases egg laying of laying chickens, the quality of the eggs obtained, shell thickness and properties of hatching.

3 cl, 18 tbl

Description

The invention relates to agriculture, in particular to industrial poultry and stimulating feed additives to increase the egg production of laying hens while improving the quality of the eggs obtained.

For hens of the egg direction, the main indicator of productivity is their egg production, that is, the number and quality of eggs. But after the first, sometimes second, technological cycle of egg laying, the bird is sent for slaughter.

There is a well-known “Method for feeding laying hens” in which, to stimulate egg productivity, a standard 5–5% solution of edible lactic acid in the amount of 3.0–5.0 kg per 1 ton of feed is introduced into standard compound feed for 2–3 months of egg laying. (see A.S. No. 1629022, A23K 1/16. Publ. 23.02.91. Bull. No. 7).

With the simplicity and accessibility of the implementation of the method, its disadvantages are the use of high-quality food product for feeding chickens.

Also known is the “Method of poultry rearing”, in which a stimulating additive — a hydrolyzate from Bonn blood of poultry and slaughter waste — is introduced into the poultry ration once a day; from 60 days to 140 days in a dose of 3-10 ml. on the head, and from 140 days in a dose of 10-15 ml. on the head. (see A.S. No. 1389039, A23K 1/00, 12/08/86).

With good use results and an increase in egg laying of laying hens up to 6.49%, this method does not guarantee the composition of the stimulating additive due to the use of a mixture of poultry slaughter waste as a raw material of the hydrolyzate, taken in any ratio.

The objective of the invention is to develop a natural biological environmentally friendly stimulating additives to effectively increase the egg production of laying hens and the quality of eggs obtained for incubation, as well as the method of its application, which helps to increase the strength of the eggshell while expanding the range of feed stimulating additives from industrial produced biological raw materials and poultry waste, convenient in use and reducing the cost of maintaining hens, with the possibility of widespread use such a stimulating additive in industrial poultry while increasing the marketability and incubation value of the eggs obtained.

The problem is solved in that as an environmentally friendly natural, industrially reproducible stimulating feed additive from poultry waste, an immunomodulator from broilers bursa aged 35-42 days of life is used, and the immunomodulator is introduced into the diet of laying hens daily in an amount of 5 to 15 mg. per 1 kg of live weight of chickens with compound feed or in liquid form with drinking water, with a duration of feeding up to 120 days.

The novelty of the invention is that the immunomodulator developed and manufactured for broiler rearing, conditionally called “Bursanatal”, is used for a new purpose as a biological stimulating additive to increase egg laying of laying hens with an increase in the commercial quality of eggs obtained by increasing the hatchability of chickens.

Used in the method "Immunomodulator for growing broilers and the method of its application" is protected by RF patent No. 2414227, A61K 35/12, Publ. 20.03.2012, Bull. No. 8.

An obvious effect of the invention is that when using this immunomodulator for a new purpose, as a stimulant for laying hens in the indicated process parameters, the stimulating additive increases the thickness of the egg shell without being a calcium-containing preparation. With an increase in the mass of eggs obtained and their transfer to breeding with a simultaneous increase in live weight of laying hens with a significant increase in their egg production and hatchability from chicken eggs.

The verification of the proposed method was performed at the Department of Physiology and Biochemistry of Farm Animals of the Ural State Agricultural Academy and at the Pervouralskaya Poultry Factory in the Sverdlovsk Region.

At the Pervouralskaya poultry farm, production studies were conducted on the chickens of the Loman White cross.

In the workshops of the poultry farm, the outdoor maintenance of laying hens using the nipple watering system is practiced.

According to technology, at the age of 102 days, the bird is transferred to an industrial workshop. Feeding of laying hens was carried out with PK-4 compound feed. In the experiment we used the Bursanatal immunomodulator, manufactured in the production department of the UrNIVI of Yekaterinburg in accordance with the RF patent, delivered in 100 ml bottles.

The study of the morphological parameters of the eggs was carried out according to generally accepted methods. The mass of eggs was determined by individual weighing on the scales. Egg density was measured by hydrometer in saline solutions. The thickness of the shell was measured with a micrometer with an accuracy of 0.01 mm in 3 areas - the equatorial part, the blunt and sharp end. The average value was calculated.

Due to the fact that, according to the technology, chickens are kept free of charge on a limited area, their main purpose is maximum productivity, therefore, the bird's resistance to various kinds of stress is reduced, which affects the quality of meat. In addition, the increased temperature, humidity and concentration of pollutants in the air of the house have a negative effect on the body.

When conducting a research experiment (from June to September, inclusive) in 2011, it was additionally determined that the tissue immunocorrector has a stimulating and adaptive effect on the body of chickens at an increased concentration of pollutants in the environment.

Table 1 shows the temperature, humidity and air velocity in the house for months during the study period.

Table 1 Temperature, humidity and air speed in the house Months of observation TEMPERATURE, ° С HUMIDITY,% AIR SPEED, MS June 25-27 65-70 0.5 July 25-26 65-75 0.35 August 20-23 75-70 0.35 September 20-23 65-70 0.25

The concentration of carbon dioxide, ammonia, hydrogen sulfide in the poultry house during the experiment is monthly presented in table 2.

table 2 The content of carbon dioxide, ammonia and hydrogen sulfide in the air of the house during the experiment Months of observation Carbon dioxide, % Ammonia, mg dm ³ Hydrogen sulfide, mg dm ³ June 0.70 0.015 0.006 July 0.25 0.015 0.006 August 0.25 0.01 0.005 September 0.25 0.01 0.004

Given that the ammonia content in the air of the house should not exceed 0.01 mg dm3, hydrogen sulfide - 0.005 mg dm3, and carbon dioxide - 0.2%, a slightly increased concentration of pollutants was observed during the experiment, especially in the first two months of observation .

The scheme of production experience is presented in table 3.

Table 3 Production Experience Scheme Group A drug Dosage Control Did not receive Experienced Group 1 Received a liquid immunocorrector 5 mg / kg body weight Experimental group 2 Received a liquid immunocorrector 10 mg / kg body weight Experimental group 3 Received a liquid immunocorrector 15 mg / kg body weight

Preservation, egg laying of chickens by months of research, depending on the content of pollutants and the sanitary and hygienic parameters of the microclimate in the house: temperature, concentration of ammonia, hydrogen sulfide, carbon dioxide, are given in table 4.

Table 4 Preservation, egg laying of chickens, depending on the received dose of tissue immunocorrector and polluting elements in the air of the house Months Indicators Control group Experience 1 Experience 2 Experience 3 June, Preservation,% 94.2 97.0 96.4 96.2 Egg production, pcs. 16,0 24.0 19.0 19.3 July Preservation,% 90.2 94.2 93.0 92.8 Egg production, pcs. 18.0 29.0 21.0 18.0 August Preservation,% 85.6 91.4 89.1 90.1 Egg production, pcs. 17.0 21.5 19.8 18.0 September Preservation,% 81.4 89.0 86.0 85.9 Egg production, pcs. 17.0 20,0 20,0 18.0

As can be seen from the data in table 4, the introduction of a tissue immunocorrector in liquid form into the diet had a positive effect on their preservation and egg production. If in the control group of chickens at elevated air temperature in the house (plus 25 - plus 27 degrees C) and humidity of 65-70%, the chicken waste was 5.8%, and only 16 eggs were obtained from one chicken, then when feeding the chickens an immunocorrector in a dose of 5 mg / kg live weight and natural - 10 mg / kg live weight - the waste was 3-4.1%, and egg production increased by 27-10%, respectively.

Therefore, the proposed tissue immunocorrector in various doses at an unfavorable temperature in the house, an increased content of ammonia, hydrogen sulfide, carbon dioxide has a stimulating effect and increases the adaptive potential of chickens and egg production.

Additionally, the stimulating and adaptive effect of tissue immunocorrector was studied on a balanced diet according to VNITIP (2000). On average, one chicken consumed 100 g of feed mixture per day. Against the background of this feed intake, the additional inclusion of a liquid immunocorrector in the water led to an increase in live weight gain of chickens, egg production and a decrease in feed costs for the production of 10 eggs and 1 kg of egg mass (table 5).

The stimulating and adaptive properties of the tissue immunocorrector were most pronounced in the group of hens who received the tissue immunocorrector at a dose of 5 mg / kg body weight in liquid form.

The average daily and absolute increase in live weight turned out to be the highest in the group of chickens that were injected with an immunocorrector at a dose of 15 mg / kg live weight, and was higher than in the control by 7.92-7.94% and a reliable value (P <0.05 )

With the introduction of 5 mg / kg liquid bursa to hens, the egg production per laying hen in relation to the control increased by 13.7%, and the egg mass yield, respectively, by 21.39% and a reliable value (P <0.001).

Table 5 Weight gain, egg production of chickens who received different doses for 120 days (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 Live weight before experiment, g 1573.30 ± 2.59 1580.0 ± 4.9 1580.7 ± 5.04 1573.30 ± 4.76 Live weight after the experiment, g 1733.33 ± 8, 84 1728.00 ± 8.02 1857.89 ± 8.77 1708.70 ± 9.81 Absolute increase, g 160,0 147.7 277.2 135.4 The average daily gain, g 1.33 1.23 2,31 1.13 Egg production, pcs. 70.3 ± 0.1 84.5 ± 0.1 79.8 ± 0.2 79.3 ± 0.2 Feed costs: for the production of 10 eggs, kg 1.7 1.42 1,50 1,63 Feed costs: for the production of egg mass, kg 3.88 4.71 4.39 4.08 The cost of feed in monetary terms for the production of 10 eggs, rubles. 7.91 6.58 6.99 7.62

Other doses also caused a steady increase in the egg production of experimental chickens in relation to the control, but they turned out to be less effective.

One of the indicators of the efficient use of feed is its cost of producing a unit of production. In studies with almost the same consumption, payment for feed was different. Hens that received tissue immunocorrector with water spent 10 eggs on the formation of up to 17.6% less feed than control. A similar pattern was observed in the cost of producing one kilogram of egg mass, showing the effectiveness of the proposed drug and method.

During the experiment from June to September 2011, at the “Pervouralskaya” poultry farm, on laying hens for 120 days, the morphological composition of the eggs of experimental chickens was studied depending on the received doses of immunocorrector, are presented in table 6.

Table 6 Morphological composition of eggs of experimental chickens (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 Egg weight, g 55,20 55.70 55.00 55.70 Shell mass, g 6.78 7.02 7.21 6.97 Shell thickness, microns 310 320 339 318 The ratio of the parts of the egg,% - squirrel 56.4 57.0 56.6 56.9 - yolk 31.18 30.39 30.28 30.58 - shell 12,42 12.61 13.12 12.52 Protein Index,% 7.20 ± 0.05 7.8 ± 0.07 7.6 ± 0.06 7.4 ± 0.05 Yolk Index,% 40 ± 0.20 47 ± 0.15 45 ± 0.21 42 ± 0.20 Protein Density, Unit How 76.14 78.9 77.1 76.9 The density of the egg, g / cm ³ 1,080 1,083 1,082 1,080 yolk pH 5.8 5.8 5.8 5.8 protein pH 7.6 7.6 7.6 7.6 The ratio of the mass of protein to the mass of yolk 1.81: 1 1.87: 1 1.87: 1 1.86: 1

From the data in table 6 it is seen that significant differences in the absolute mass of the components of the eggs obtained from the experimental groups of chickens, compared with the control, were not detected. All indicators were within normal limits. However, obtaining chickens tissue immunocorrector, increases the index of protein and yolk, increases the thickness and weight of the shell. This was especially noticeable in the first experimental group of chickens receiving immunocorrector from the factory bursa at a dose of 5 mg / kg live weight.

The ratio of the mass of protein to the mass of yolk in the egg of experimental hens was in the range of 1.81-1.87: 1. When a bird received a tissue immunocorrector from a factory bursa, a tendency toward an increase in egg protein density was observed. According to M.V. Orlov (1972), the higher the protein density, the better the incubation quality of an egg. The density of eggs obtained from the hens of the experimental groups also tended to increase. If the egg density in the control group of chickens was 1,080 g / cm ³ , then in the experimental groups, respectively: 1,083; 1,082; 1,080 g / cm ³ .

Table 7 shows the data on the content of carotenoids and vitamin A in the eggs of experimental chickens, depending on the received dose of tissue immunocorrector from the factory bursa.

Table 7 The content of carotenoids, vitamin A in the egg of experimental chickens receiving various doses of immunocorrector (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 The content of vitamin A, mcg / g 6.2 ± 0.02 6.5 ± 0.01 6.5 ± 0.01 6.8 ± 0.01 The amount of carotenoids, mcg / g 6.2 ± 0.01 6.4 ± 0.03 6.5 ± 0.01 6.7 ± 0.01

As can be seen from the data presented in table 7, the content of carotenoids and vitamin A in the egg of the experimental group of hens was slightly higher than in the control group. (P≤0.001)

It should be noted that in all experimental groups, the egg production of chickens receiving tissue immunocorrector from the factory bursa was also higher than in the control. Therefore, with an increase in egg mass, the removal of carotenoids from the body of chickens increases.

Based on the data obtained, it follows that the introduction of tissue immunocorrector into the diet of chickens leads to an increase in the accumulation of carotenoids in the egg, and increases its consumer qualities.

The content of calcium in the shell, egg mass and tibia of the experimental groups and the control group in chickens was also shown in Table 8.

Table 8 The calcium content in the egg and tibia of experimental chickens (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 Egg mass 5.18 ± 0.12 5.32 ± 0.20 5.65 ± 0.18 5.30 ± 0.21 Shell 380 ± 0.70 388 ± 0.65 392 ± 0.50 390 ± 0.38 Tibia 225.49 ± 0.22 247.59 ± 0.24 290.42 ± 0.25 243.45 ± 0.28

The control group tissue immunocorrector did not receive

From the data given in table 8, it can be seen that with the introduction of tissue immunocorrector from chicken bursa into the diet, the calcium content in the tibia and shell increased. A dose of 10 mg / kg live weight (liquid form), a tissue immunocorrector, in which the calcium content in the tibia and shell increased in comparison with the control group: in bone by 64.93 g / kg or by 28, is especially effective in this regard. 8%, in shells 12 g / kg or 3.15%, in egg mass - 0.47 g / kg or 9.07%.

Based on the data obtained, it is seen that the inclusion of a tissue immunocorrector, with drinking water in the form of a liquid, for laying hens has a positive effect on mineral metabolism, as evidenced by the concentration of calcium in the shell and tibia of hens.

When giving a tissue immunocorrector to laying hens, its effect on the incubation quality of eggs obtained from experimental chickens was analyzed (Table 8).

As can be seen from the data in table 9, the largest number of unfertilized eggs was in the control group of hens. Based on the data obtained during the incubation of eggs from the control and experimental groups of hens, it can be argued that the tissue immunocorrector from the factory bursa of chickens has an adaptive and stimulating effect on the body. This is confirmed by the percentage of chickens removed from the eggs of the control and experimental groups, since with any negative effect on the body of birds and animals, as you know, the reproductive function first of all suffers. In studies using tissue immunocorrection at the indicated doses, the hatchability of chickens from eggs of experimental chickens increased by a significant amount (P≤0.01). The greatest effect on hatchability was found to be doses of tissue immunocorrector from the factory bursa of chickens of group No. 1, hens received a liquid immunocorrector at a dose of 5 mg / kg live weight.

Table 9 The incubation quality of the eggs of experimental chickens receiving tissue immunocorrector from the factory bursa of chickens Indicators Counter. Group Experience 1 Experience 2 Experience 3 Eggs laid for incubation, pcs. 55 55 55 55 Fertilized eggs,% 92.72 96.36 94.54 94.54 Unfertilized Eggs four 2 3 3 Unfertilized Eggs,% 7.27 3.63 5.45 5.45 Blood ring 3 one four 3 Blood ring% 5.45 1.81 7.27 5.45 Zamershikh, pcs. 5 2 3 2 Frozen,% 9.1 3.63 5.45 3.63 Zadokhlikov, pcs. 2 one 3 2 Zadokhlikov,% 3.63 1.82 5.45 3.63 Chickens bred. 39 49 42 45 % output 70.90 89.09 76.36 81.81

In this group, the percentage of chickens in relation to the control increased by 18.19%, respectively.

As can be seen from the data presented in table 10, the level of total protein in the blood serum of chickens who received tissue immunocorrector is higher than in the control by 0.1-0.3 g%.

Moreover, its content in the blood serum of the experimental groups receiving tissue immunocorrector increased by a significant amount (P≤0.001).

Table 10 Change in biochemical blood parameters of experimental chickens Indicators Counter. Group Experience 1 Experience 2 Experience 3 Total protein, g% 5.3 ± 0.05 5.4 ± 0.08 5.6 ± 0.05 5.5 ± 0.09 Sugar, mg% 120.8 ± 3.2 122.9 ± 3.9 123.4 ± 2.6 122.1 ± 3.0 Carotene, mg% 0.122 ± 0.7 0.136 ± 0.8 0.138 ± 0.6 0.138 ± 0.7 Calcium, mg% 16.2 ± 0.2 16.6 ± 0.3 16.4 ± 0.3 16.4 ± 0.2 Phosphorus, mg% 5.1 ± 0.2 5.3 ± 0.3 5.3 ± 0.2 5.2 ± 0.2

It should be noted that the level of calcium and phosphorus in the blood serum of all groups of chickens was balanced in mineral composition.

As can be seen from the previous data, the tissue immunocorrector has a stimulating, adaptive and regulatory effect (on metabolism and on the water-salt metabolism) on the physiological status of chickens at an increased concentration of pollutants in the air. Therefore, it can be assumed that chickens will use feed nutrients more efficiently, which was confirmed during the physiological (balance) experiment.

VNITIP (2000) recommends that 100 g of feed contain at least 16-17 g of crude protein. When conducting a physiological experiment, we proceeded from these recommendations.

The ingredients of the feed ration of chickens during carrying out the balance experiment are presented in table 11.

Against the background of the diet shown in table 11, the coefficients of the use of feed protein by chickens were determined depending on the doses of tissue immunocorrector obtained from the factory bursa of broiler chickens received in the diet.

Table 11 Ingredient composition of the feed ration during carrying out the balance experiment Ingredients The content in the recipe,% Wheat 32.10 Barley 19.00 Soya bold extruded joint venture 37% 15.00 Wheat bran 10.00 Corn 10.00 Limestone flour 9.00 Fish flour joint venture 63% 4.00 Fish oil 0.50 Common salt 0.40

During the study, all experimental hens daily throughout the balance experiment received in accordance with the actual required food 16.19 to 17.06 g of crude protein per head.

From the above data it can be seen that all experimental chickens, the protein contained in the feed, were used quite high (58.26% -60.77%). This indicator, namely the digestibility coefficient, was the highest in the first experimental group, which amounted to 60.77%, which is 2.5% more than the same indicator in the control group.

The coefficient of protein utilization of chickens fed with tissue immunocorrector was higher in the experimental groups than in the control group. In this regard, we can conclude that the tissue immunocorrector has a positive effect on the use of feed protein. When chickens use tissue immunocorrector, regardless of the dose, the coefficient of protein utilization of feed increases the gain in body weight of hens and egg production. The yield of egg mass increases, and the cost of feed for the formation of 10 eggs is reduced.

Table 12 Digestibility ratios of poultry feed protein depending on the received doses of tissue immunocorrector from the factory bursa of broiler chickens Indicators Counter. Group Experience 1 Experience 2 Experience 3 Raw protein taken with feed, g 17.06 16.19 16.98 16.84 Highlighted protein: - with a litter 7,120 6.35 6.96 6.90 - with an egg 6.29 6.56 7.19 6.22 Overcooked, g 9.94 9.84 10.02 9.94 Digestibility coefficient,% 58.26 60.77 59.01 59.03 Balance +3.65 +3.26 + 2.83 +3.72

The digestibility and balance of calcium in experimental chickens, depending on its actual consumption with water, regardless of the doses, was almost the same and did not have any special differences from the doses received, which are presented in table 13.

As can be seen from table 13, hens that received tissue immunocorrector, absorbed calcium better than the control. The removal of calcium with egg mass, shell, and its content in the tibia of the hens of the experimental groups were higher than in the control. Tissue immunocorrector, affects the relationship between the level of calcium in the diet and its absorption.

Table 13 Digestibility and balance of calcium in experimental chickens, depending on the doses received Indicators Counter. Group Experience 1 Experience 2 Experience 3 Calcium consumed with feed, g 3.97 3.87 3.95 3.91 Highlighted: 2.25 2.03 2.13 2.15 - with a litter, g - with egg mass and shell, g 1,63 1.75 1.76 1,69 Assimilated g 1.72 1.79 1.82 1.76 Balance g +0.07 +0.04 +0.06 +0.07 Digestibility coefficient,% 43.32 46.86 46.07 45.01

The coefficient of assimilation of calcium in control chickens was 43.32%, in the experimental groups it was higher by 0.61-3.54%. The highest digestibility of calcium was observed in chickens, in experimental group No. 1 — they received a liquid immunocorrector at a dose of 5 mg / kg body weight, and were higher than the control ones by 3.54% and by a reliable value of P≤0.001.

The need for laying hens in calcium is the highest among animals. This is due to the fact that with each egg, the chicken secretes about 2 grams of calcium, which is in the shell in the form of CaCO ₃ . Shell formation occurs in the shell gland (uterus) within 21 hours. To transfer calcium to the shell gland, the participation of a protein that binds calcium is required.

Table 14 The assimilation and balance of phosphorus of the experimental bird, depending on the received doses of tissue immunocorrector Indicators Counter. Group Experience 1 Experience 2 Experience 3 Consumed phosphorus with feed, g 0.91 0.87 0.91 0.90 Phosphorus highlighted: 0.60 0.56 0.59 0.59 - with a litter, g - with egg mass and shell, g 0.23 0.25 0.27 0.25 Assimilated g 0.31 0.31 0.32 0.31 Balance g +0.08 +0.06 +0.05 +0.06 Digestibility coefficient,% 34.0 35.6 35,2 34.5

In studies when hen laying hens were included in the diets, a tissue immunocorrector, regardless of the form of administration and dose, showed a tendency to increase the consumption of phosphorus from feed.

The content of phosphorus and calcium in the diets of chickens during the studies was in the ratio of 1.00: 4.35-4.47 or within the recommended norms for feeding the bird.

As can be seen from the data presented in table 15, the nitrogen balance in all experimental chickens was positive.

Table 15 The balance and assimilation of nitrogen by the experimental bird, depending on the received doses of tissue immunocorrector Indicators Counter. Group Experience 1 Experience 2 Experience 3 Nitrogen taken with feed, g 2.73 2.59 2.72 2.69 Nitrogen released: 1,140 1.016 1,114 1,104 - with a litter, g - with egg, g 1.006 1,050 1,150 0,995 Assimilated g 1,590 1,574 1,606 1,586 Balance g +0.584 +0.524 +0.456 +0.591 Digestibility coefficient,% 58.26 60.77 59.01 59.03

Considering that the tissue immunocorrector affects vital organs that ensure the normal functioning of the body, a control slaughter of chickens was performed. The mass of the liver and heart was determined. Since the role of these organs in the complex metabolic chain in the body of birds is very large.

Table 16 The absolute mass of vital organs, for example, the heart and liver of an experimental bird (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 Heart, g 9.2 ± 0.26 10.4 ± 0.24 9.9 ± 0.13 9.5 ± 0.07 Liver, g 56.3 ± 1.43 58.9 ± 1.10 57.6 ± 0.88 56.9 ± 1.03

As can be seen from table 16, tissue immunocorrector has a positive effect on the growth and formation of internal organs of chickens, on the example of the heart and liver, a particularly positive effect was obtained when receiving a liquid immunocorrector, at a dose of 5 mg / kg live weight, experimental group 1.

Table 17 Physiological parameters of carcasses, control and experimental groups (M ± m) Indicators Counter. Group Experience 1 Experience 2 Experience 3 Live weight, g 1730 ± 10.6 1750 ± 9.8 1810 ± 10.1 1712 ± 9.6 The mass of gutted carcass, g 1626.2 ± 8.75 1644.8 ± 9.16 1701.6 ± 8.96 1609.0 ± 9.23 The mass of gutted carcass, g 1351.1 ± 12.8 1368.5 ± 14.15 1424.5 ± 10.83 1335.4 ± 11.56 Slaughter yield,% 78.1 78,2 78.7 78.0 The mass of gutted carcass, g 1093.4 ± 5.51 1123.5 ± 6.51 1196.4 ± 7.00 1095.7 ± 6.92 Bone mass, g 205.8 ± 15.8 196.0 ± 16.0 193.2 ± 14.8 196.3 ± 16.5 The mass of muscle tissue with skin and subcutaneous fat, g 887.6 ± 5.2 972.5 ± 5.9 1003.2 ± 9.1 899.4 ± 5.5 The share of edible parts,% of the mass of gutted carcass 54.58 ± 0.31 56.39 ± 0.42 58.95 ± 0.48 55.90 ± 0.33

The average live weight at the end of the experiment was the highest in group 2 chickens. For slaughter, a bird was selected according to the mass characteristic of its group. After slaughter and butchering, the slaughter yield of carcasses turned out to be the highest for hens, experimental group No. 2 - 78.7; whereas in the control group this indicator was 0.1-0.2% less and amounted to 78.1%

All carcasses from experimental chickens receiving a tissue immunocorrector had a higher meat content. The yield of edible parts, that is, boneless meat in them, was 1.32-4.82% higher compared to the control (P≤0.05)

Based on the data obtained, the most effective for increasing the meat productivity of chickens should be considered the dose of experimental group 2 - receiving a liquid immunocorrector at a dose of 10 mg / kg of live weight.

Economic efficiency using different forms and doses of tissue immunocorrector when applying laying hens of an industrial herd was calculated on the basis of actual results, taking into account the fecundability and hatchability of chickens, at the Pervouralskaya poultry farm. The comparison was carried out with the results obtained by other groups 1 and also the control group. This approach to calculating economic efficiency was applied due to the fact that the feeding rations, conditions, and light conditions of the experimental and industrial hens were identical.

The results of the estimated economic efficiency of the application of the proposed stimulator of laying eggs and methods of its use are shown in table 18.

As can be seen from the table 18, the percentage of fertilized eggs obtained from chickens that used a liquid immunocorrector at a dose of 5 mg / kg live weight was higher than the control group by 3.66%; and chickens from fertilized eggs received 202 heads or 18.19% more. It was higher than that from the eggs of control chickens by 20.0%, as a result of which there were 219 more chickens received (P≤0.001).

Table 18 Economic efficiency when using tissue immunocorrector in chickens of group No. 1 (received a liquid immunocorrector, at a dose of 5 mg / kg live weight) Indicators Control group (chickens of industrial herds) group No. 1 (received a liquid immunocorrector, 5 mg / kg live weight) Laid for egg incubation, pcs 1000 1000 % fertilization 92.7 96.36 The number of fertilized eggs, pcs. 927 964 % output 70.9 89.09 Received chickens from fertilized eggs, pcs. 657 859 The total cost of daily chickens, rubles. 7489.8 9792.6 The cost of preparing tissue immunocorrector 38.5 Profit obtained from the sale of chickens from eggs of experimental hens, rubles +2264.3 The actual cost of a daily chicken, rubles. 11,4 8.76

Calculations showed that only by improving the incubation quality of 1000 eggs, the net profit when using the Bursanatal liquid immunocorrector at a dose of 5 mg / kg live weight can amount to 2264.3 rubles. The cost of daily chickens of the experimental groups was lower than the control by 2.64 rubles. or 23.16%.

Claims (3)

1. The use of an immunomodulator from the factory bursa of broilers aged 35-42 days of life as a biological stimulating additive to increase the egg production of laying hens, improve the quality of the eggs and the incubation properties of eggs. 2. A method of increasing egg laying in laying hens, characterized in that an immunomodulator from broiler bursa of broilers aged 35-42 days of life is used as a stimulating additive in an amount of 5 to 15 mg per 1 kg of live weight of the bird for 120 days. 3. A method of increasing egg laying of laying hens according to claim 2, characterized in that an immunomodulator from a broiler bursa at the age of 35-42 days is introduced into the diet daily, in liquid form with drinking water.