Efficiency of application of the mixed fodders is at growing of chickens-broilers

Fijalovych, L. M.; Kyryliv, Y. I.; Paskevych, G. А.

doi:10.32718/nvlvet-a9312

Cited by 2 publications

(2 citation statements)

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“…Якщо взаємодія "Г×С" незначна, генетичну продуктивність можна визначити за допомогою зміни фенотипових ознак у різних середовищах. Однак, якщо взаємодія "Г×С" є значною, це середнє значення буде замасковане субсередовищем, де генотипи значно відрізняються у відносній продуктивності (Chegini et al, 2018;Franzoni et al, 2018;Fijalovych et al, 2019Fijalovych et al, , 2020.…”

Section: вступunclassified

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Khvostik,

Paskevych,

Fijalovych

2024

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The article presents the research results on the evaluation of the polygenically determined quantitative trait “laying” under the influence of the interaction “genotype × environment” on the comprehensive genetic material of chickens. Meat and egg hens of the original maternal form of domestic breeding, descendants of the first and second generations of different genesis, and improved synthetic populations performed it. The laying hens of the experimental groups were determined during seven months of egg laying. By using a two-factor variance analysis, a probable influence of genotypic affiliation (P < 0.05) and the month of egg laying (P < 0.001) on the level of manifestation of laying hens of the studied groups was established. The probable difference in the gradation of “condition” factors made it possible to evaluate the parameters of plasticity and stability in the studied groups of birds. The regression coefficient (bi) characterizes the average reaction of a group of individuals to a change in environmental conditions, that is, their plasticity, which makes it possible to predict the variability of the trait under the studied conditions. High bi-indicators indicate a more significant response of a group of chickens to a change in environmental conditions, influenced by active factors. That is, the larger the value of bi, the steeper the regression line, and the more sensitive the group is to changes in detention conditions. A zero or close to zero value of bi indicates that the group reacts poorly to changes in environmental conditions (in our case, the months of egg-laying). Plasticity analysis makes it possible to identify genotypes of birds with significant adaptability to changes in environmental conditions. The laying hens of the created synthetic population, the offspring of the first generation of different genetic origins, and the F2 hens of the “K-51” group were more plastic in laying. This indicates the slightest response of this bird to changes in environmental conditions. The “Ross” birds of the “K-22” and “K-32” groups of different generations and the original maternal form F10 were less plastic according to this feature; that is, they were more sensitive to the influence of active factors. The variant of stability (S2i) of the feature shows how reliably the selection feature of the studied group of birds corresponds to the plasticity estimated by the regression coefficient. The closer the S2i indicators are to zero, the less the empirical values of the characteristic differ from the theoretical values located on the regression line. The “Ross” hens of the second generation of the “K-22” and “K-32” groups were distinguished by their high laying stability (S2i=2.42–2.65). The least stable in terms of this polygenic trait was the “Kobb” chickens of the “K-51” and “K-5” groups (S2i=6.01–9.53). Hybrids of the first generation were characterized by more excellent laying stability than mothers.

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Section: вступunclassified

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Khvostik,

Paskevych,

Fijalovych

2024

SMLNUVMBA

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“…Хімічний склад м'язів, % (М ± m, n = 4) Показники Групи контрольна дослідна грудні м'язи суха речовина 27,8 ± 0,48 28,3 ± 0,48 зола 1,1 ± 0,05 1,1 ± 0,13 загальний білок 21,9 ± 0,79 22,4 ± 0,53 загальні ліпіди 1,4 ± 0,09 1,5 ± 0,07 стегнові м'язи суха речовина 26,3 ± 0,48 26,8 ± 0,48 зола 1,0 ± 0,03 1,4 ± 0,16 загальний білок 19,6 ± 0,48 20,9 ± 0,53 загальні ліпіди 3,2 ± 0,12 2,9 ± 0,12 Примітка:  -Р  0,05;  -Р  0,01;  -Р  0,001 Варто зазначити, що, можливо, курчата-бройлери краще використовували сирий протеїн корму, а це сприяло його підвищенню у грудних м'язах (Fijalovych et al, 2020).…”

Section: таблицяunclassified

Effectiveness of different protein sources and lysine levels in diets for broiler chickens

et al. 2022

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The article highlights current data on the biological role of the most crucial feed nutrients - protein and lysine in the feeding of broiler chickens and their particular importance in the vital activity of the bird's body. A description of the value and quality of the main types of compound feed for poultry, recipes of compound feed with different protein and lysine content for specific age groups of broiler chickens, and practical advice on the peculiarities of feeding and rearing of poultry are given. Current brief information on amino acid feed additives and general features of more rational and practical use of various protein feed of both vegetable and animal origin in poultry feeding of meat crosses – grains of cereal crops, processed products of oil crops – soy, sunflower, and many other components are provided. Theoretically and experimentally, the expediency of using different essential feed protein sources, differing in amino acid composition and bioavailability, in poultry feeding rations has been substantiated. In particular, the main principles of adequate feeding of broilers with compound feed with an increased level of crude protein of vegetable origin and a lower level of animal protein are described. Brief information on the effectiveness of safe levels of lysine of synthetic origin in the diet based on a variety of local feeds when growing broiler chickens in the conditions of a poultry farm in the western region are presented. It was established that compound feed with a significantly increased protein content of various origins – 24 %, 22 % and 20 % – positively affects broiler chickens' productivity. The highest level of productivity was noted for the lysine content in broilers' compound feed in the first growing period – 1,22 %, in the second – 1,14 % and in the third – 1,09 %. The high quality, nutritional value, and beneficial effects of amino acid premixes are directly influenced by the available feed raw materials, mainly of vegetable origin, used for the production of compound feed in the conditions of a broiler poultry farm, the uniformity of mixing with the appropriate quality feed and the optimal dosage of amino acids in each portion of the feed mixture.

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Efficiency of application of the mixed fodders is at growing of chickens-broilers

Cited by 2 publications

References 7 publications

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Parameters of plasticity and stability of laying hens under the interaction “genotype × environment”

Effectiveness of different protein sources and lysine levels in diets for broiler chickens

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