RU2775744C1 - Method for determining the physiological readiness of heifers for the first insemination and fertilization - Google Patents

Abstract

FIELD: biotechnology.

SUBSTANCE: invention relates to the field of biotechnology. The invention is a method for determining the physiological readiness of heifers for the first insemination and fertilization, which consists in measuring the level of bioelectric potential of superficially localized biologically active centers No. 5, No. 7, No. 11, No. 41, No. 44, calculating its average value, and with the value of this indicator 77.3±1.50 mcA and more state the high efficiency of insemination and fertilization.

EFFECT: using the proposed method, the complexity of determining the physiological readiness of heifers for the first insemination and fertilization is reduced.

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Description

The invention relates to animal husbandry, in particular to cattle breeding and can be used to determine the physiological readiness of heifers for the first insemination and fertilization.

Known methods for determining the readiness of heifers for the first insemination according to a set of signs, including the measurement of live weight and age determination (A.I. Zhigachev, P.I. Ukolov, A.V. Bill, O.G. Sharaskina Workshop on breeding farm animals with the basics private zootechnics: textbooks and manual for students of higher educational institutions - M.: KolosS, 2009 - 232 pp. [p. 15, 27, 110]) [1], fixation of pronounced signs of sexual dominance (hugging reflex, reflexes jumping and "immobility"), rectally - according to the state of the uterus and the development of follicles. The uterus must be rigid, ie. well contracting, the presence of follicles is determined on the ovaries. The diameter of the follicle 0.5-1 cm (F-1) indicates the beginning of the hunt, 1-1.5 cm (F-2) - about its middle, 1.5-2 cm or more (F-3) - the end of the hunt , i.e. optimum time for insemination. This means that 10-12 hours are left before ovulation.

The fertility rate from the first insemination is set according to the entries in the insemination registration log, the manifestations of the severity of the signs of sexual dominant are determined by the time of the next estrus.

The disadvantages of these methods include the lack of qualified specialists, equipment for weighing animals, insufficiently organized zootechnical and veterinary records.

The objective of the invention is to reduce the complexity of the method for determining the physiological readiness of heifers for the first insemination and fertilization.

The technical result of the proposed method is to reduce the time of selection of heifers in the hunt and determine their physiological readiness for the first insemination and subsequent fertilization.

The task and the technical result are achieved due to the fact that in the method for determining the physiological readiness of heifers for the first insemination and fertilization, which consists in measuring the level of the bioelectric potential of superficially localized biologically active centers No. 5, No. 7, No. 11, No. 41, No. 44, calculating it of average value and with a value of this indicator of 77.3±1.50 μA and more, high efficiency of insemination and fertilization is stated.

The method allows you to quickly and objectively determine the readiness of heifers for the first insemination and fertilization before the onset of estrus. To clarify the essence of the proposed method, Fig. is presented, which shows superficially localized biologically active centers of cows.

Localization and numbering of the centers are taken according to G.V. Kazeev (1994) [3]:

No. 5 dorso-medial line of the body between the first and second spinous processes of the lumbar vertebrae;

No. 7 dorso-medial line of the body in the depression between the spinous process of the last lumbar vertebra and the first sacral vertebra;

No. 11 dorso-medial line of the body in the depression between the second fixed and third mobile caudal vertebrae;

No. 41 medial line of the body at a distance of one palm width and two finger widths under the vulva in cows;

No. 44 three finger widths below the lower edge of the patella, lateral to one transverse finger from the crest of the tibia.

To measure the bioelectric potential of PLBAC heifers, any device designed for electropuncture or taking readings of the bioelectric potential of superficially localized biologically active centers of the skin of animals, for example, ELAP devices, can be used.

In the experiments, heifers of black-and-white Holsteinized breed were used at the age of 15-18 months in the amount of 20 heads, live weight from 320 to 340 kg. Bioelectric potential was measured from the onset of estrus 2 times a day: in the morning and in the evening. (The beginning of estrus was established by the manifestation of external signs). The level of bioelectric potential of superficially localized biologically active centers No. 5, No. 7, No. 11, No. 41, No. 44 was measured, the average value was found, and at a value of less than 77.3 ± 1.50 μA, the follicle diameter was set from 1 to 1.5 cm ( F-2), which meant the middle of the heat, more than 12 hours left before ovulation and insemination efficiency will be low. With an average biopotential level of 77.3±1.50 μA or more, the follicle diameter was set from 1.5 to 2 cm (F-2), which meant the end of the hunt, less than 12 hours remained before ovulation, and the insemination efficiency would be high.

Example 1. In heifers of Black-and-White Holsteinized breed with an average live weight of 320 kg at the age of 16 months, the bioelectric potential was measured with an ELAP-type milliammeter in five PLBAs of the skin No. 5, No. 7, No. 11, No. 41, No. 44. The average level of biopotential in five centers was 58.4±1.58 μA. The follicle diameter was set from 1.5 cm (F-2), which means the middle of the hunt. Ovulation is more than 12 hours away and insemination efficiency will be low.

Example 2. In heifers of the Black-and-White Holsteinized breed with an average live weight of 340 kg at the age of 16 months, the bioelectric potential was measured with an ELAP-type milliammeter in five PLBATS of the skin No. 5, No. 7, No. 11, No. 41, No. 44. The average level of biopotential in five centers was 77.3±1.50 µA. The diameter of the follicle was set from 1.5-2 cm (F-2), which means the end of the hunt. Ovulation is less than 12 hours away and insemination efficiency will be high.

In all animals, the level of biopotential was measured in five PLBATS No. 5, No. 7, No. 11, No. 41, No. 44, its average value and the readiness of heifers for the first insemination and fertilization were determined. Data on the relationship between the level of the bioelectric potential of superficially localized biologically active centers and the readiness of heifers for the first insemination and fertilization are presented in the table.

The table shows that there is a clear correlation between the level of bioelectric potential No. 5, No. 7, No. 11, No. 41, No. 44 and the readiness of heifers for the first insemination and fertilization.

When using the proposed method, the complexity of determining the physiological readiness of heifers for the first insemination and fertilization is reduced.

Claims (1)

A method for determining the physiological readiness of heifers for the first insemination and fertilization, which consists in measuring the level of bioelectric potential of superficially localized biologically active centers No. 5, No. 7, No. 11, No. 41, No. 44, calculating its average value, and with the value of this indicator 77.3 ±1.50 μA and more state the high efficiency of insemination and fertilization.

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