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article

Shablya V., Doctor of Agricultural Sci., Professor, 
https://orcid.org/0000-0001-6510-5397
State Biotechnological University

DOI https://doi.org/10.32900/2312-8402-2022-127-196-203

Keywords: prediction, age at first calving, exterior traits, model, regression.

Abstract

The results of predicting the age of the first calving using multiple regression analysis, based on exterior measurements and body structure indices of heifers, determined twice - at the age of about 100 days and about a year are shown. The models are designed using both linear and nonlinear components. The developed models are considered in terms of their adequacy and reliability. To improve the quality of the models, the "folding knife" method was tested. Verification of models was carried out by methods of sliding control, division of the sample into educational and examination samples and selection simulation. The most important dependencies are highlighted and analyzed. Based on the exterior indicators of heifers around 100 days of age, we obtained a model for predicting the age of the first calving, which was unreliable (P = 0.91) and characterized by a low reduced coefficient of determination (R2adj = 0.21) and a large standard prediction error (SE = 104.75 days). The final parameters of the model of predicting the age of the first calving based on exterior indicators determined at an age of about one year are characterized by high reliability (p> 0.999), good determination (R2adj = 0.58) and quite acceptable differences between predicted and actual values of the age at first calving (SE = 77.01 days). The most adequate is the model based on a double exterior study. It is advisable to use this model in the version of the "folding knife" for a more accurate and complete assessment of animals at an early age. This model provides a coincidence of predicted and actual negative estimates of the age of the first calving in 65.7% of cases. The most valuable features for predicting and interpreting the dependence of the age of the first calving on the exterior of heifers are such as the stretch index and oblique body length at 365 days of age. The degree of their influence on the expected age of the first calving is the maximum among all predictors and is η2=16.46% and η2=9.10%, respectively.

References

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article

Khokhlov A. M.,  Doctor of Agricultural Sci., Professor, 
https://orcid.org/0000-0002-3265-1874
Fediaieva A. S.,  Ph.D., senior scientist, https://orcid.org/0000-0003-1227-9873
Honcharova I .I., Ph.D., docent, https://orcid.org/0000-0003-0190-7803
Shevchenko O. B., Ph.D., docent, https://orcid.org/0000-0002-6747-5487
State Biotechnological University

DOI https://doi.org/10.32900/2312-8402-2022-127-185-196

Keywords: population, breed, polymorphism, domestication, phylogeny.

Abstract

As a result of evolution, a gradual change in the hereditary structure of a species, not only the number of genes changes, but also their properties, frequency, and direction of variability. Changes in gene frequencies occurring over a relatively small period of time belong to microevolution. The breeding process in pig breeding is the microevolutionary processes originating from the ancestral forms of Sus scrofa to the modern specialized breeds of pigs. Genetic monitoring of the genetic systems of blood groups makes it possible to assess the genetic structure and processes occurring in populations.
The microevolutionary process of transformation of wild ancestral forms over the last 10-12 thousand years from transitional forms of local aboriginal to factory breeds has occurred with significant genetic and phenotypic transformations in animal populations. In this connection, it is important to clarify the correct understanding of the terms 'population' and 'breed'. Naturally, any breed is a population, but not any population is not a breed, especially since both population and population as taxonomic terms have different interpretations. In the first place, a distinction must be made between wild populations, in which microevolution takes place only by means of natural selection, and breed populations, in the development of which artificial selection was involved as a fundamental factor in microevolution. Depending on the level of methods and forms of selection, we have to distinguish local indigenous populations (e.g., Kakhetian and Mangali breeds) and basic factory breeds (Large White, Berkshire, Landrace, Duroc, etc.), which have been created for decades and centuries. The concept of a breed is closely linked to the size of the reproductive population and the range of distribution. According to FAO, in 2006 there were some 730 breeds and lines of pigs worldwide, most of which are bred in China and Europe, and 270 of which are regarded as rare breeds. At the same time, 58 breeds (25 regional and 33 international) are registered as common, i.e. occurring in more than one country. Five international breeds are now widely distributed: Large White (117 countries), Duroc (93 countries), Landrace (91 countries), Hampshire (54 countries) and Petren (35 countries).

References

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article

Tkachova I. V.,  doctor agricultural science, Senior Researcher,
 https://orcid.org/0000-0002-4235-7257
Institute of Animal Science NAAS of Ukraine
Frolova G.O., https://orcid.org/0000-0002-9994-4903
State Enterprise "Agency for identification and registration of animals"
Platonova N. P., doctor agricultural science, Senior Researcher,
https://orcid.org/0000-0003-2256-7932
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-177-185

Keywords: horses, Orlov’s Trotter, mare families, generation, selection traits.

Abstract

It was found that the domestic population of horses of the Orlov’s Trotter breed is 465 individuals, including mares of reproductive age - only 193, which indicates a significant limitation of this breed. The most numerous uterine families by number of successors: Vorozheyka and Fatma (8.3% in the uterine composition), Rumba (7.8% in the uterine composition) and Cadetka (7.3% in the uterine composition). Only 12 mares (6.2%) belong to a small number of uterine families, numbering 1-2 mares (Aristocratka, Kaluga, Pusti, Damochka, Zib, Lelya, Levitsa, Panika, Pika). The analyzed uterine families number from 3 to 10 generations from the ancestor to the representatives of the modern uterine composition.
Evaluation of mare families on a set of breeding traits found that the highest liveliness at a classical distance of 1600 m on average characterized mares belonging to the uterine families of Lena (2.11,4 ± 0,65 min), Uh-Kakaya (2.12.2±0,28 min), Dosujaya (2.13,4±0,18 min), Barvikha (2.15,3±0,41 min), Vorojeyka (2.15,7±0,15 min), Cadetka (2.15,8± 0,22 min). The quietest mares belong to the parent families of Povest, Evil, Molodytsa, Kaleria. Mares from the mare families of Lena, Vorojeyka and Molodytsa differ in terms of measurement indicators. They are characterized by high stature, elongated body shape, typical of the harness type of horses, bulky chest. In terms of wrist circumference, all assessed mares do not exceed 20.8 cm, which indicates an insufficient level of skeletal development and, accordingly, is not negatively affected by agility.
By dividing into gradations by liveliness classes, it was established that mares of the Orlov’s Trotter breed of the Ukrainian population of liveliness class 2.05 min and more vigorous were not detected. Of all tested mares (76.2 %), only 12.2 % have a high liveliness class of 2.10 min or more. However, mares of low liveliness class (2.30,1 min and quieter) are few - 10.9 %. The predominant number of mares have an average liveliness class of 2.10,1-2.20 min (55.1 %) and 2.20,1-2,30 min (21.8 %). Almost a quarter of mares (23.8 %) remain untested, which negatively affects the selection process. Most mares of high vitality class belong to the parent families: Barvikha, Dan’, Dosuzhaya, Rumba, Uh-Kakaya.

References

1. Rozhdestvenskaya, G. A. (2003). Orlovskij rysak. [Orlov’s Trotter]. Moscow : Akvarium [in Russian].

2. Vitt, V. O. (1952). Iz istorii russkogo konnozavodstva. Sozdanie novyh porod loshadej na rubezhe XVIII-XIX st. [From the history of Russian horse breeding. Creation of new breeds of horses at the turn of XVIII-XIX centuries]. Moscow : Sel'hozizdat [in Russian].

3. Vitt, V. O. (1929). Ocherki po istorii rysistogo i konnozavodstva i begovyh ispytanij. [Essays on the history of trotting and horse breeding and running tests]. Konnozavodstvo i konevodstvo. 987(31). 5–9 [in Russian].

4. Regulations on approbation of selection achievements in animal husbandry. Order of the Ministry of Agrarian Policy and Food of Ukraine № 385. (2012) [in Ukranian]. URL: https://zakon.rada.gov.ua/laws/show/z1217-12#Text

5. Zavadovskij, M. M. (1922). Pol i razvitie ego priznakov. K analizu formoobrazovanija. [Sex and the development of its characteristics. To the analysis of shaping]. Moscow [in Russian].

6. Shhepkin, M. M. (1947). Iz nabljudenij i dum zavodchika. [From the observations and thoughts of the breeder]. Moscow : Sel'hozizdat [in Russian].

7. Naumova, Є. O. (2000). Matochnye semejstva i ih vlijanie na mikrojevoljuciju trakenenskoj porody loshadej [Brood families and their influence on the microevolution of the Trakehner breed of horses]. (Extended abstract of candidate’s thesis). All-Russian Research Institute of Horse Breeding. Divovo [in Russian].

8. Hopka, B. M., Skotsyk, V. Ye. & Zlamaniuk, L. M. (2018). Suchasne i maibutnie orlovskoho rysaka [Present and future of the Orlov’s Trotter]. Naukovyi visnyk NUBiP. Seriia «Tekhnolohiia vyrobnytstva i pererobky produktsii tvarynnytstva» [Scientific Bulletin of the National University of Bioresources and Nature Management. Series "Technology of production and processing of animal husbandry products"]. Kyіv, 114, 99–107 [in Ukranian].

9. Melnyk, Yu. F., Klok, V. M., Mykytiuk, D. M., Horoshko, I. P. & Bezuhla, L. Yu. (2003). Prohrama selektsii konei orlovskoi rysystoi porody v Ukraini na 2001–2010 roky [Program of breeding horses of the Orlov’s Trotter in Ukraine for 2001–2010]. Kyіv : Agrarna nauka [in Ukranian].

10. Tkacheva, I. V. (2019). Genealogicheskaya struktura orlovskoj rysistoj porody [Genealogical structure of the Orlov’s Trotter]. Sovremennye dostizheniya aktual'nye problemy konevodstve, Proceedings of the Internetional Scientific and Practical Conference. Divovo : All-Russian Research Institute of Horse Breeding, 256–264 [in Ukranian].

11. Tkachova, І. V. & Frolova, G. O. (2020). Genealogіchnі lіnії v orlovs'kіj risistіj porodі ukraїns'koї chastini populyacіyi [Genealogical lines in the Orlov’s Trotter of the Ukrainian part of the population]. Naukovo-tekhnichnyi biuleten Instytutu tvarynnytstva NAAN [Scientific and Technical Bulletin of the Institute of Animal Science of the National Academy of Agrarian Science of Ukraine]. Kharkiv,123, 184–193. doi: 10.32900/2312-8402-2020-123-184-193 [in Ukranian].

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article

Rudenko Ye., Doctor of Veterinary Medicine. Sci., Professor, Corresponding Member of NAAS, https://orcid.org/0000-0002-2200-2758
Vasilevsky M., Candidate of Biological Sci., Senior Researcher,
https://orcid.org/0000-0002-7437-2910
Yeletskaya T., Candidate of Biological Sci., Senior Researcher,
https://orcid.org/0000-0001-8980-6972
Sediuk I., Candidate of Agricultural Sciences, 
https://orcid.org/0000-0003-1765-2868
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-171-176

Keywords:  blood biochemical parameters, metabolic status of the animal, qualimetric assessment

Abstract

A method for calculating a complex integral indicator of the metabolic state of an animal's body based on a biochemical blood test is proposed. The essence of the method lies in the fact that within the reference zone of distribution of each biochemical indicator included in the processing, its actual value turns into an index of relative normality equal to 100 % if the result of the analysis coincides with the middle of the reference zone and equal to 0 % if it coincides with the extreme values. When the indicator goes beyond the reference range, the relative normality index takes negative values. The conversion of the actual value (quality) was carried out taking into account linear proportionality. Integration was performed by calculating the arithmetic mean for all available blood biochemical parameters. As a result of such processing of the biochemical analysis of blood parameters, an integral parameter is obtained that characterizes the metabolic status of the animal's body as a percentage of the conditional norm. In this case, an important characteristic of the state of the body is the dispersion of the obtained value of "normality". This method processed the results of blood tests of lactating cows under the influence of the feeding factor. When applying the dispersion statistical method of analysis, no influence of the feed factor on the status of the biochemical profile of varnishing cows was revealed. Dispersion analysis of converted blood biochemical parameters to units of conditional normality established the difference between the control group of animals and the experimental group at the level of a trend. The variance value of the normality coefficient decreased by the end of the second period in the control group by 42.95 %, and in the experimental group by 57.89 % compared with the first period. The proposed method of qualimetric transformation of blood biochemical parameters can be used for rapid assessment of the current biochemical status of lactating cows, provided that the influence of one or another feeding factor is adequately analyzed.

References

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  4. Milaeva, I. V., Voronina, O. A., & Zajcev, & S. Ju. (2017). Osobennosti metabolizma laktirujushhih korov [Features of the metabolism of lactating cows] RJOAS: Russian Journal of Agricultural and Socio-Economic Sciences, 2(62), 275-281. doi: https://doi.org/10.18551/rjoas.2017-02.32 [in Russian]. 
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  7. Brscic, M., Cozzi, G., Lora, I., Stefani, A. L., Contiero, B., Ravarotto, L., & Gottardo, F. (2015).Short communication: Reference limits for blood analytes in Holstein late-pregnant heifers and dry cows: Effects of parity, days relative to calving, and season. J. Dairy Sci., 98(11), 7886-7892.  doi: 10.3168/jds.2015-9345
  8. Cozzi, G., Ravarotto, L., Gottardo, F., Stefani, A. L., Contiero, B., Moro, L., Brscic, M., & Dalvit. P. (2011). Short communication: Reference values for blood parameters in Holstein dairy cows: Effects of parity, stage of lactation, and season of production. J. Dairy Sci.,94(8), P.3895–3901. doi: 10.3168/jds.2010-3687.
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article

Pomitun I. A., doctor agricultural science, profesor,
https://orcid.org/0000-0002-7743-3600
Kosova N. O., Candidate of Agricultural Sciences, senior scientist,
https://orcid.org/0000-0001-7353-1994
Pankiv L. P., Candidate of Agricultural Sciences, senior scientist,
https://orcid.org/0000-0002-3295-2132
Bezvesilna A.Researcher, https://orcid.org/0000-0002-6292-7819
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-162-171

Keywords: ewes, viable building, living mass, reproductive period, lambs, growth rate.

Abstract

Studies were undertaken in the breeding facility of the Іnstitute of Animal Science NAAS "Gontarovka” on sheep 3-8 years of age of the Kharkiv type of breed of Merinos precoce. For this purpose, (early May 2020) the indexes of living mass were certain on electronic scales within 0.1 kg Whereupon animals were contained during May - September at the camp-pascual system with the additional fertilizing by grain of oat for 0.5 kg/ in a day and by a pasture on a natural pasture. Before the artificial insemination living mass of animals and their general increase was also certain for a period of preparation for the new cycle of reproduction, and after lambing their fecundity, the living mass of lambs, was taken into account at birth, in 20 - and 90-day's age. It is set that the living mass of sheep that in a next reproduction campaign bore lone persons increased for an unreproductive period by 19.8%, at giving birth twins this index grew by 22.2%, and for animals, giving triplet birth increased by 28.2%. Here living mass of sheep, that in a subsequent period had twins and triplets in an initial period of account felt strongly anymore about animals lambed individually on 6.1-7.3%. Thus, the difference between the first and second groups of uteruses appeared high-credible (р<0.001). At the end of the registration period difference on behalf of sheep 2 and 3 groups against the first group increased accordingly to 9.3% (р<0.001) and 13.5% (р<0.05). The average daily increases of lambs for the period from their birth to 20 days ha have a sufficiently clear connection with the indexes of increase of living mass of their mothers in the period of preparation for the new cycle of reproduction.
The average daily gain of yags for the period from their birth to 20 days is quite clearly related to the growth rates of live weight of their mothers in preparation for the new cycle of reproduction. The maximum average gain of lambs was obtained from ewes, the increase in live weight of which in the study period ranged from 10 to 15.9 kg. On this basis, lambs exceeded the results of peers from 6.1 to 17.9%. The indexes of living mass of eves before their insemination have positive coefficients of correlations with a living mass of lambs at wean from mother, and also average daily increases of lambs for the first 20 days of their life. They were made according to 0.346, 0.243 and 0.113.

References

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2. Pokhil, V. I., Pokhil, O. M., Linsky, O. V. & Golynska, O. Y. (2017). Promyslove skhreshchuvannia u vivcharstvi za uchasti porody sharole [Industrial crossbreeding in sheep breeding with the participation of the Charolais breed]. Naukovyi visnyk Natsionalnoho universytetu bioresursiv i pryrodokorystuvannia Ukrainy: Seriia «Tekhnolohiia vyrobnytstva i pererobky produktsii tvarynnytstva» - Scientific Bulletin of the National University of Life and Environmental Sciences of Ukraine: Series "Technology of production and processing of livestock products." Kyiv, 271, 148–157 [in Ukrainian].

3. Zaruba, K. V. & Drozd, S. L. (2017). Rezultaty vykorystannia miasnykh henotypiv na vivtsiakh askaniiskoi porody [The results of the use of meat genotypes in sheep Askanian breed]. Naukovyi visnyk Natsionalnoho universytetu bioresursiv i pryrodokorystuvannia Ukrainy: Seriia «Tekhnolohiia vyrobnytstva i pererobky produktsii tvarynnytstva» - Scientific Bulletin of the National University of Life and Environmental Sciences of Ukraine. Series "Technology of production and processing of livestock products." Kyiv, 271, 95-102 [in Ukrainian].

4. Zaruba, K. V. & Drozd, S. L. (2018). Miasna produktyvnist molodniaku za promyslovoho skhreshchuvannia ovets askaniiskoi tonkorunnoi porody z miasnymy henotypamy [Meat productivity of young animals by industrial crossing of Askanian fine-wooled sheep with meat genotypes]. Vivcharstvo i kozivnytstvo - Sheep and goat breeding. Nova Kakhovka: Piel, 39-47 [in Ukrainian].

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article

Pomitun I. A., doctor agricultural science, profesor,
https://orcid.org/0000-0002-7743-3600
Kosova N. O., Candidate of Agricultural Sciences, senior scientist,
https://orcid.org/0000-0001-7353-1994
Korkh I. V., Candidate of Agricultural Sciences, senior scientist,
https://orcid.org/0000-0002-8077-895X
Boyko N. V., Candidate of Agricultural Sciences
https://orcid.org/0000-0001-6742-8456
Chigrinov E. I., Dr. sc. agr., Professor, https://orcid.org/0000-0001-7707-8269
Pankiv L. P., Candidate of Agricultural Sciences, senior scientist,
https://orcid.org/0000-0002-3295-2132
Aksonov Ie. A., Ph.D., https://orcid.org/0000-0002-6292-7819
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-152-162

Keywords: tup teg, feeding, productivity, protein, fattening, quality of meat, blood, biochemical composition.

Abstract

In the article, the results of experience are exposed on fattening of rams 11-12 monthly age with application energy – protein addition ТЕP-mix. Studies were undertaken in the conditions of experimental economy of Institute of Animal Science NAAS by the method of the control fattening during  60 days with by the next coalface of animals and estimation of the chemical composition of mutton. It is set that feeding to the rams in composition a basic ration  0.10-0.15 kg/ in the day of addition of ТЕP -mix with solubility оf protein in the scar of ruminant 31 percent provided the increase of intensity of height of animals from 46.8 to 48.2 percents to the control group that got the mixed fodder - concentrate.For a period of experience, there is a middle living mass of rams of control group ipercentncreased on 18,1percent, while in experience accordingly - on 27.6 and 27.9 percent.
A clear tendency is set to the height of content in the blood of rams of experience groups of general albumen on 3.5-6.5 percent against control  (at his maintenance within the limits of the norm). Thus this index appeared the greatest for animals that got ТЕP-mix in an amount of 0.15 kg/ on a 1 animal in the day. Mass of pair carcass in ІІ and ІІІ experience groups felt strongly higher about control on 9.6 and 12.4 percent accordingly.
Studies of the chemical composition of average samples of lamb meat have shown a clear trend to increase the dry matter content in the carcasses of animals of the control group - by 1.91 and 3.33 absolute percent. It is noteworthy that the advantage of this indicator of lambs in the control group is due solely to the higher content of mass fraction of fat in the dry matter of meat - 2.49 and 4.45 absolute percent against peers of groups II and III.
The meat of lambs of both experimental groups is characterized by the optimal ratio between the content of mass fractions of protein and fat, while in the control group the content of mass fraction of fat prevails.

References

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article

Podobed L., Doctor of Agricultural Sci., Professor
https://orcid.org/0000-0003-4903-4597
Kosov M., Researcher, https://orcid.org/0000-0002-8850-745X
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-144-152

Keywords: dairy cows, technological cycle, lactation phase, rumination, fiber level.

Abstract

In a long-term experiment on red-spotted dairy cows using the SCR Heatime HR-IR system, the nature of rumination in animals was studied. The experiment involved 10 dairy cows, which were observed during the year-round physiological cycle.Studies have shown that the phase of the physiological cycle is not significantly affected by the term rumination. Rumination gradually increases after calving from 254 to 510 from 1 to 62 days of lactation, and then stabilizes at 505-509 minutes per day.
Then, due to the change in the composition of the diet during the transition from the first to the second phase of lactation, the level of rumination temporarily increases for 5-7 days to 562 minutes, and then stabilizes again at 536-538 minutes.In the third phase of lactation there is a gradual decrease in rumination and at the time of launch it becomes minimal for the second phase - 505 minutes.In the dry phase, rumination gradually decreases close to the time of birth. In some cows, it is completely absent for several hours.
After childbirth, the duration of rumination again gradually increases and returns to normal by 45-55 days of lactation.The level of rumination in cows is closely and directly correlated with the content of fiber in the diet. At optimal fiber levels, rumination in cows ranges from 505-540 minutes per day. When the concentration of fiber exceeds the optimal level, it goes beyond the normal level in the greater direction, and the reduction of fiber to less than 16 -18 % of dry matter, becomes insufficient for normal physiological digestion of the diet.The indicator of the term rumination can be used to characterize the norm of fiber concentration in the diet. Rumination and its dynamics can serve as a reliable test of the physiology of digestion of cows and characterize the stressful state of the cow's body.
Healthy cows have the highest rumination rates at the time of transition from the second to the third phase of lactation.The intensity of rumination decreases more than twice in the naturally stressful moments of the physiological state of cows during the transition from one phase of the physiological cycle to another, in the last three weeks of pregnancy and during calving.Rumination in cows is directly and closely correlated with the level of fiber in the diet - andan increase in fiber increases the duration of rumination in animals.Reducing the level of fiber in the diet of cows below the optimal level leads to a significant reduction in rumination and its departure from the physiological norm.

References

1. Kovzov, V. V., Ostrovskiy, A. V., & Sherikov, S. E. (2003). Zheludochnoe pishchevarenie u zhvachnykh zhivotnykh [Gastric digestion in ruminants]. Vitebsk : VGAVM [in Ukrainian].

2. Molchanova, M. A. (2020). Produktivnye kachestva golshtinskoy porody s raznoy dvigatel'noy i zhevatel'noy aktivnost'yu [Productive qualities of the Holstein breed with different motor and chewing activity]. (Extended abstract of candidate’s thesis). Moscow : FGBOU VO «Rossijskij gosudarstvennyj agrarnyj universitet – MSHA im. K. A. Timirjazeva» [in Russian].

3. Podobied, L. I., & Kurnaiev, O. M. (2012). Pytannia zahotivli, zberihannia ta vykorystannia kormiv v umovakh intensyvnoi tekhnolohii vyrobnytstva moloka [Issues of procurement, storage and use of fodder in conditions of intensive milk production technology]. Odesa : Drukarskyi dim [in Ukrainian].

4. Podobied, L. I., Oleksandrov, S. M., Rudenko, Ye. V. ta insh. Tekhnolohichni, kormovi ta veterynarni aspekty vyroshchuvannia vysokoproduktyvnykh koriv [Technological, fodder and veterinary aspects of raising high-yielding cows] Kharkiv : Instytut tvarynnytstva NAAN [in Ukrainian].

5. Khoy, Sh. (2015). O chem rasskazhet zhvachka [What will chewing gum tell]. Novoe sel'skoe khozyaystvo, 2, 60-63 [in Russian].

6. Pahl, C., Hartung, E., Mahlkow-Nerge, K., Haeussermann, A. (2015). Feeding characteristics and rumination time of dairy cows aroundestrus. Journal of Dairy Science, 1, 148-154.

7. Pahl, C., Hartung, E., Grothmann, A., Mahlkow-Nerge, K., Haeussermann, A. (2014). Rumination activity of dairy cows in the 24 hours before and after calving. Journal of Dairy Science, 97, 11, 6935-6941.

8. Reith, S., Brandt, H., Hoy, S. (2014). Simultaneous analysis of activity and rumination time, based on collar-mounted sensor technology, of dairy cows over the pri-estrus period. Livestock Science, 170, 219-227.

9. Ruminacija - indikator samochuvstvija korovy [Rumination - an indicator of the cow's well-being]. ProfCorm.URL: https://profcorm.ru/lib/news/ruminaciya-korovy/ (date of application: 09.04.2022).

10. Ruminacija kak indikator zdorov'ja korovy [Rumination as an indicator of cow health]. TheDairyNews. URL: https://www.dairynews.ru/news/ruminatsiya-kak-indikator-zdorovya korovy.html (date of application: 09.04.2022).

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article

Platonova N. P., Doctor of Agricultural Sci., senior scientist,
https://orcid.org/0000-0003-2256-7932
Institute of Animal Science NAAS of Ukraine

DOI https://doi.org/10.32900/2312-8402-2022-127-138-144

Keywords: rabbits, intensive rhythm, intensification of rearing technology, sodium butyrate, feed conversion, fattening young.

Abstract

To intensify the technology of growing rabbits of the Hy-Plus hybrid, the indicators of daily live weight gains, and absolute and relative values of feed intake were studied, and the feed conversion of fattening young rabbits was calculated for the introduction of sodium butyrate in a protected form in the amount of 2 g/kg. An intensive (42-day) rabbit rearing rhythm was used. Weaning of rabbits was carried out at the age of 36 days, the average weight of weaned rabbits was 0.922±0.04 kg. The studies continued from the 47th to the 60th day of life. The following were taken into account: the number of rabbits at the end of the experiment, the average weight for each group at the end of the experiment, feed consumption, and the conversion was calculated. Statistical data processing was carried out using the accepted methods of variation statistics. According to the principle of groups-analogues, 100 normally developed rabbits at the age of 47 days were selected, which were placed five individuals without separation from sex in cages of 0.342 m2 on a mesh floor of 1.6×12×50 mm. The rabbits were constantly supplied with water (one nipple drinker for five individuals, pH of the water was 7.4-7.6) and complete mixed feed (plate-type bunker feeder). The average weight at the beginning of the experiment in each group was 1.419±0.006 kg (control) and 1.423±0.005 kg (experiment). The difference between the formed groups at the beginning of the experiment in terms of weight was incredible F (1.198=0.29; p=0.592). When calculating daily gains and feed costs, real data on the number of animals at the end of the experiment was used. It was found that the average daily gain in the experimental group was 16.32 % higher than in the control group and during the study period was 57 g/day. In the experimental group, compared to the control group, feed intake increased by 6.5 % and feed conversion improved by 7.59 % (3.12 in the control group and 2.90 in the experimental group). The use of protected sodium butyrate in a complete feed improves feed conversion rates and allows you to quickly reach the optimal condition of young rabbits.

References

  1. Tang, K. L., Caffrey, N. P., Nóbrega, D. B., Cork, S. C., Ronksley, P. E., Barkema, H. W., Polachek, A. J., Ganshorn, H., Sharma, N., Kellner, J. D., & Ghali, W. A. (2017). Restricting the use of antibiotics in food-producing animals and its associations with antibiotic resistance in food-producing animals and human beings: a systematic review and meta-analysis. Lancet Planet Health, 1(8), 316-327. doi: 10.1016/S2542-5196(17)30141-9.
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  5. Hullar, L., Fekete, S., Szigeti, G., & Bokori, J. (1996). Sodium butyrate as a natural growth promoter for rabbits. In Proc.: 6 th World  Rabbit Congress, 9-12 July. Toulouse, France, 175-179.
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Оголошується набір статей до чергового 128 номеру НТБ (правила оформлення)

Наукометричні профілі науковців ІТ НААН (подивитися)

Увага! Змінилася адреса Інституту (подивитися)

Об’ява! Оренда приміщення  (детальніше)

Звіти діяльності ДП ДГ "Гонтарівка" (подивитися)

Корисна інформація

Послуги і пропозиції:

- дослідження якості кормів та продукції тваринного походження: (Прайс)

- молекулярно-генетичні і фізіолого-біохімічні дослідження: (Прайс)

- перелік послуг, що надаються ІТ НААН:(прайс)


Наукова література