A new method for assessing the operational value of sows
The paper presents the results of a study of the lifespan, breeding use, and reproductive qualities of sows of the Large White breed of foreign origin. Based on the research results, a new mathematical model, “operating value of a sow,” was developed, and a scale for evaluating animals of the specif...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv
2025-04-01
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| Series: | Ukrainian Journal of Veterinary and Agricultural Sciences |
| Subjects: | |
| Online Access: | https://ujvas.com.ua/index.php/journal/article/view/212 |
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| Summary: | The paper presents the results of a study of the lifespan, breeding use, and reproductive qualities of sows of the Large White breed of foreign origin. Based on the research results, a new mathematical model, “operating value of a sow,” was developed, and a scale for evaluating animals of the specified production group was developed according to this indicator. The research was conducted in agricultural formations of Dnipropetrovsk, Odesa, and Sumy regions, as well as in the animal husbandry laboratory of the State Institution Institute of Grain Crops of the NAAS. The work was carried out following the scientific research program of the National Academy of Agrarian Sciences of Ukraine No. 31, “Genetic improvement of farm animals, their reproduction and preservation of biodiversity.” (Genetics, preservation, and reproduction of bioresources in animal husbandry). The research results show that high lifespan indicators, breeding use, and reproductive qualities characterize sows of the Large White breed of foreign origin. A significant difference between the animals of the experimental groups (I, “high level of operational value” – III, “low level of operational value” was established by the following indicators: life expectancy (18.7 months; td = 13.75), duration of breeding use (19.6 months; td = 15.68), total number of farrowing received (4.1; td = 26.97), total number of live piglets received (52.3 heads; td = 30.40), multiparity (1.1 heads; td = 4.78), number of piglets at the time of weaning (0.3 heads; td = 2.14), litter weight at the time of weaning at the age of 30 days (4.5 kg; td = 3.46). The number of significant pairwise correlation coefficients between the index “operating value of the sow” (Kh1), life expectancy, duration of breeding use, and reproductive qualities of sows is 100 % and ranges from – 0.389 ± 0.0626 to +0.999 ± 0.0001. It was established that the maximum increase in additional production was obtained from the I experimental group sows with a “high level of operational value.” It is +3.67 %, and its cost is +145.67 UAH/head/farrowing. The evaluation index “Kh1” for sows of the “high level of operational value” category ranges from 83.55 to 134.67 points. |
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| ISSN: | 2617-6149 |