Reproductive capacities of sows after the use of neurotropic and metabolic preparation in different doses

Abstract

The main tasks in the development of pig breeding is to increase the livestock, breeding the most adapted breeds to the climatic and economic conditions, intensifying the reproduction of the herd, growing and fattening pigs in order to transform it into an effective part of livestock breeding.

In conditions of industrial pork production, indoor housing systems of sows’ keeping, as well as the shortened lactation period (26-30 days), adversely affect their reproductive capacity. As a result, the manifestation of sexual hunting is delayed, the duration of the idle period increases, the fertility and prolificacy of sows decreases.

Nowadays, various ways of stimulation and restoration of sexual cycles of sows with the help of biologically active substances, vitamins and gonadotropins are being developed.

However, with a large variety of biostimulants and their significant impact on the organism of the animal, some remain poorly studied, and others only in the process of being investigated. Therefore, interest in the study of biologically active stimulants of metabolic and neurotropic effects remains relevant.

The purpose of the study was to develop a biotechnological method for stimulating the reproductive capacity of sows using different doses of neurotropic and metabolic, biologically active preparation of Glutam 1M.

The studies were conducted on sows of large white breed and landraces.

During 30 days, 1 control and 5 experimental groups have been formed, 15 animals in each. These groups were formed according to the principle of group-analogues: according to fertility, previous multiplicity, dairy capacity and number of offspring. Sows had an average fattening and a live weight of 200-220 kg. Animals were in the same conditions of feeding and keeping. Sows received the preparation of Glutam 1M in 1-3 days after the weaning of piglets:animals of the experimental group – in a dose of 0,24 ml / kg, II – 0,26 ml / kg, III – 0,28 ml / kg, IV – 0,30 ml / kg, and V – 0,32 ml / kg. A physiological solution was used in a control group of animals.

Sows in sexual hunting were identified by using young boars. Animals in sexual hunting were artificially inseminated twice, with an interval of 18 hours, by a diluted semen of the breeding boars.

The analysis of the data showed that the fertility of sows in experimental groups, whereGlutam 1M in a dose of 0,28 and 0,30 ml / kg was used, was higher compared to control by 20,0 and 14,3 %, respectively.

When using of preparation in a dose of 0,26 and 0,32 ml / kg,the fertility of sows increased by 7,7 %. And when using it in a dose of 0,24 ml / kg, the fertility of animals was equal to control.

Thus, the use of Glutam 1M in a dose of 0,28 ml/kg contributes to the highest increase in fertility indicators of females, compared to the control and other experimental groups.

The multi-fertility of sows of experimental groups, whereGlutam 1M in various doses was used, prevailed at 0,2; 1; 2,5; 0,9 and 0,8 heads, respectively.

Use of a neurotropic drug of metabolic action in various doses also contributes to a reduction in the number of stillborn piglets.

So,when using the drug at a dose of 0,26 ml / kg – the number of stillbirth piglets decreased by 0,4 heads, 0,28 – 0,30 ml / kg – 0,3 heads, and for animals that received 0,32 ml / kg – 0,8 head. The number of stillborn piglets from animals receiving a drug at a dose of 0,24 ml/kg of a body weight was higherby 0,2 head.

The prolificacy of sows of experimental groups, whereGlutam 1Mwas used in the dose range of 0,24-0,32 ml / kg, prevailed at 9,5; 11,8; 12,4; 13,5 and 11,8 %, respectively.

When usingGlutam 1Mat a dose of 0,24 ml / kg, the idle period of females was reduced by 0,3 days, 0,26 ml / kg – 0,9 days, 0,28 ml / kg – 0,4 days, 0,30 ml / kg – 08 days, and 0,32 ml / kg – 0,6 days, compared to the control.

Thus, the main indicators of reproductive capacity of sows, namely fertility, multi-fertility and prolificacy, increased for using the drug for 1-3 days of the idle period, after the use of a total dose of 0,28 ml / kg of the body weight of animal.

A comparative analysis of the effect of Glutam 1M in various doses on the reproductive capacity indicators during 3 days of the idle period shows its effect on the body in a functionally tense period of the reproductive cycle of females. The effect of the drug most likely is caused bythe changes in the progesteronesecretion, since its concentration during the drug usage decreases.

Lowering of the level of progesterone removes the block from the pituitary gland,so the secretion of follitropin and lutropin increases. These changes promote the proliferation of granulosa cells and follicles begin to grow.

An increase in fertilization of sows that received a biologically active drug for 1-3 days of idle period in the total dose of 0,26-0,32 ml / kg promotes the ovulation of an additional number of follicles due to the growth of the concentration of follicle stimulating hormone.

The growth of secretion of follitropin and lutropin in animal blood resulted in a faster luteinisation of follicular cells during the growth and development of a greater number of yellow bodies. All these changes in the body of sows have contributed to the engraftment of embryos, their growth and vitality, which is confirmed by an increase in multiplicity, prolificacy and a decrease in the number of stillborn piglets in experimental groups.