RU2536491C1 - Method of early forecasting of egg productivity of chickens - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: method of early forecasting of egg productivity of chickens includes early selection of chickens by egg productivity. At the 10-th day of life the assessment of constitutional attribute, namely the length of tibiotarsus, is performed and a young growth with the length above 28 mm is selected for the further selection for the herd of chickens with high egg-laying capacity.

EFFECT: offered invention allows to form high productive herd of egg production chickens.

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Description

The invention relates to the field of poultry, namely to breeding chickens.

This study shows a correlation between the productive indicators of chicken egg production and the length of their lower leg.

An early assessment of chickens by egg productivity contributes to their targeted selection in the formation of an industrial herd.

There is a method of selecting young chickens for manning a herd using growth and development control. With this method, at the age of 4 weeks, young animals are weighed individually in control cells. At this age, the correlation between the mass of chickens and their future productivity is high and amounts to + 0.6-0.7, therefore, selecting the young livestock at the age of four weeks by the standard live weight, future hens with high egg production are also selected (S.I. Bogolyubsky. Breeding poultry. M., 1991, 284 pp.).

The disadvantages include:

1. In violation of feeding conditions and content, the accuracy of selection decreases.

2. This method is not acceptable for other species and breeds of poultry.

As a prototype, a method for early prediction of egg productivity of chickens was selected, copyright certificate No. 2152715, class. A01K 31/00, A01K 67/00, where egg laying was carried out during the first 15 days of the breeding season and the time of laying eggs was taken into account. Counting was carried out until the appearance of the first series of at least three eggs. And according to the time of laying this series of eggs, egg laying is predicted for the entire productive period.

The disadvantages include:

1. The great complexity of evaluating poultry by egg productivity.

2. A lot of time is required for growing the bird and the appearance of the first series of eggs.

The technical result is to increase the accuracy of selection of hens at an early age.

The technical result is achieved by the fact that in the method for early prediction of chickens for egg productivity, including early selection of chickens for egg productivity, according to the invention, on the 10th day of life, an assessment of the constitutional sign is carried out, for which the leg length is used for selection and with a length exceeding 28 mm young growth is selected for further acquisition of a herd of high egg laying hens.

The claimed technical solution differs from the prototype in the following:

1. An earlier selection of chickens to form a breeding and industrial herd of chickens.

2. High accuracy of selection and low complexity of the method.

According to the scientific, technical and patent information, a similar feature set has not been identified, which allows us to conclude about the inventive step of the claimed technical solution.

Industrial applicability of the method lies in the fact that it can be used in breeding poultry to increase their egg productivity in an industrial environment.

An example of a specific implementation of the method of early prediction of chickens for egg productivity

In the conditions of LLC PPZ Labinsky, 60 chickens of daily age were selected and assigned individual numbers. On the 10th day of life, the chickens measured the length of the leg using a measuring tape with an accuracy of 1 mm. Before the laying of eggs at the age of 110 days, these chickens were landed in individual specialized cells. Only one chicken is planted in each cage, and the nest number of the chicken is indicated on the front panel of the cage.

Then measurements of the length of the leg in the same chickens were made at the age of 156 days in order to reveal the variability of this trait.

On the 200-260 day of life, chickens recorded egg production to determine the dependence of egg production on the length of the leg at the age of 10 days.

A positive correlation was observed between productive indicators, namely, egg laying of chickens and the length of their lower leg. A feature of the early method for predicting the egg productivity of chickens is the selection of chickens at the age of 10 days with a shin length of more than 28 mm from chickens in egg production.

The data obtained are presented in tables 1 and 2.

Table 1 The coefficient of variability of the length of the leg at different ages of the bird Indicator Bird age, days 10 156 Number of animals, goal. 56 56 Shin length, cm 2.79 ± 0.03 7.25 ± 0.03 Coefficient of variability,% 7.89 3.03

The data in the table indicate that the coefficient of variability along the shin length at the age of 10 days is high and amounts to 7.89%. With age, this trait consolidates and at the age of 156 days it is 3.03%. Therefore, based on the above data, the selection of young animals by the length of the leg should be carried out precisely at the age of 10 days.

table 2 The dependence of egg production of laying hens on the length of the leg at the age of 10 days No. Shin length in 10 days, mm Egg laying of laying hens at the age of 200-260 days one twenty 54 2 25 53 3 23 54 four 25 56 5 25 55 6 thirty 59 7 25 55 8 27 58 9 26 57 10 28 59 eleven 29th 59 12 25 54 13 28 58 fourteen thirty 58 fifteen thirty 59 16 28 57 17 29th 58 eighteen 29th 57 19 29th 58 twenty 29th 59 21 28 56 22 29th 58 23 thirty 58 24 29th 57 25 26 55 26 29th 58 27 29th 57 28 26 56 29th thirty 58 thirty thirty 59 31 thirty 59 32 thirty 57 33 thirty 60 34 28 56 35 thirty 59 36 thirty 60 37 thirty 58 38 thirty 57 39 thirty 59 40 thirty 58 41 thirty 60 42 29th 56 43 26 55 44 28 57 45 27 58 46 26 56 47 25 56 48 27 57 49 28 55 fifty 27 56 51 28 57 52 25 57 53 28 59 54 28 55 55 57 56 59 r ± m _r = 0.801 ± 0.08

An analysis of Table 2 showed that the correlation between the shin length at the age of 10 days and the egg production of laying hens is positive, high (r ± m _r = 0.801 ± 0.08), and with an increase in the length of the leg, the egg production of the bird will increase. So, with a shin length of 28-30 mm, the egg production of laying hens averages 57-60 pieces of eggs for 60 days of productivity.

Claims (1)

A method for early prediction of egg productivity of chickens, including early selection of chickens for egg productivity, characterized in that on the 10th day of life an assessment of the constitutional trait is carried out, which is used for shin length selection and young animals are selected for length over 28 mm for further stock picking high egg laying hens.