Growing of young turkeys with different ratios of lysine and methionine in combined feeds
DOI:
https://doi.org/10.31548/poultry2025.01-02.006Abstract
The article highlights the results of research on determining the optimal level of valine in broiler chickens' feed. The scientific and economic experiment investigated the effect of different levels of valine in feed on live weight, absolute, average daily, relative weight gain and feed consumption in broiler chickens. At a day-old age, 330 broiler chickens of the "Ross-308" cross were randomly divided into 3 groups of 110 birds each, which received complete pelleted feeds that differed in valine levels. The broilers were fed complete pelleted feed. The amount of metabolizable energy of nutrients and biologically active substances in the feed for all groups of
broilers was the same. At the same time, the feeds for broilers of the experimental groups differed in the content of valine. The nutritional value of the feeds varied depending on the age of the broilers: 1-10, 11-24, 25-37 and 38-45 days. The amount of total valine in the feed for the first group was respectively – 11.7; 10.6; 9.8; 9.3 g/kg, for другої – 12.2; 11.1; 10.2; 9.7 g/kg and for the third group – 11.2; 10.2; 9.4; 8.9 g/kg. That is, in the second group, broilers received a diet with an increased (up to 5%) valine content compared to the first group, and in the third group – with a reduced (up to 5%). The results of the research show that broiler chickens in the first (3325.1 g) and second (3402.2 g) groups at the end of rearing (45 days) had a live weight slightly higher than that recommended by Aviagen (3295 g). In the third group, broiler chickens did not reach the standard weight (3247 g). Compared to the control, the chickens receiving feed with an increased level of valine had a higher final live weight by 2.3%. The description of the growth of young broiler chickens using mathematical methods confirmed the S-shaped growth curve with a high coefficient of determination for each experimental group with a reliable approximation coefficient R2=1
References
Published
Issue
Section
License
Relationship between right holders and users shall be governed by the terms of the license Creative Commons Attribution – non-commercial – Distribution On Same Conditions 4.0 international (CC BY-NC-SA 4.0):https://creativecommons.org/licenses/by-nc-sa/4.0/deed.uk
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
