INDICATORS OF SLAUGHTER OF BROILER CHICKENS USING DIFFERENT LEVELS OF VALINE
DOI:
https://doi.org/10.37406/2706-9052-2026-1-24Keywords:
valine, amino acid, feed, broiler chickens, slaughter yieldAbstract
The article highlights the results of research on determining the optimal level of valine in broiler feed. In a scientific and economic experiment, the effect of different levels of valine in feed on slaughter rates in broiler chickens was investigated. 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 amount of metabolizable energy, nutrients and biologically active substances in the feed for all groups of broilers was the same. The nutritional value of the feed was changed 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 control group was 11.7, 10.6, 9.8, 9.3 g/kg, for the first experimental group – 12.2, 11.1, 10.2, 9.7 g/kg and for the second experimental group – 11.2, 10.2, 9.4, 8.9 g/kg. When using feed with a high content of valine, pre-slaughter live weight increased by 2.0 %; semi-gutted carcass weight – by 2.6 %; gutted carcass weight – by 3.5 %; breast muscle weight – by 4 %; weight of pelvic muscles – by 2.4 %; yield of semi-gutted carcass – by 0.6 (Р < 0.05) %); yield of gutted carcass – by 1.5 %; yield of breast muscles – by 2.0 % and yield of pelvic muscles – by 1.5 %. When using feed with a reduced level of valine compared to the control, the weight of poultry breast muscles was lower than the control by 87 g, which is 6.1 % (р < 0.05), there was a lower yield of half-gutted carcass by 0.8 % (р < 0.01), and a lower yield of breast muscles (by 4 %, р < 0.01). The study indicates the need to update the recommended levels of valine for different periods of poultry rearing. Given that there are various factors that can lead to a deficiency of valine in broiler chickens that can impair their growth performance, further in-depth research is needed to address this issue.
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