Akademik Veri Yönetim Sistemi
ıNTENATİONAL POULTRY CONGRESS, Strategic approaches for sustainable poultry meat and egg production, Bursa, Türkiye, 8 - 11 Mayıs 2024, cilt.1, ss.42-43
The aim of the study was to investigate the effects of low-protein and essential amino acid-balanced diets that would reduce feed cost on performance parameters such as body weight gain, feed consumption, feed conversion ratio, and meat quality. A total of 1050 one day old male chicks of Ross 308 genotype at one day of age were
divided into 3 groups, each consisting of 350 chicks and further subdivided into 10 subgroups, each comprising 35 animals. From days 1 to 10, all groups were fed a diet containing 22.5% crude protein (CP) without changing the protein content. All groups’ diets have been balanced with essential amino acids lysine, methionine, threonine,
tryptophan, isoleucine, leucine, arginine and valine according to the data in the Ross 308 user guide. From days 11 to 22, the first group was fed a diet with 20.60% CP (LP1), the second group with 19.5%CP(LP2), and the third group with 18.5% CP (LP3). Between days 23 to 37, the first group was fed a diet containing 20.00% CP,
the second group with 19%CP, and the third group with 18% CP. At the 22nd and 37th days of the trial, the body weights of broiler chickens were individually measured. On the same days, feed weighing was conducted to calculate individual feed consumption and feed conversion ratio of the broiler chickens. At day 22, the body
weights of the first and second groups were found to be close to each other and were not statistically significant. However, the body weight of the third group (18.5% CP) was statistically significantly (P≤0.05) lower compared to the first (20.60% CP) and second (19.50%CP) groups. When considering the feed consumption at day 22, the
first and second groups showed similar values with no statistical difference between them. However, the third group consumed less feed in parallel with body weight and this decrease was found to be statistically (P≤0.05) significant compared to the first and second groups. Regarding the 37th day, there was no statistically significant
difference in body weight between the first and second groups, whereas the body weight of the third group was found to be lower compared to the first and second groups, and this difference was statistically (P≤0.05) significant. In the 37-day, feed consumption and feed conversion ratio showed similar results among the groups
and were not statistically significant. Similarly, in the samples taken from the breast meat at day 37, while there were no statistically significant differences in protein content, cooking loss, pH, moisture analysis results. As a result of the decrease in feed protein content, the fat content in breast meat has increased (P≤0.05) significantly.
The results are generally evaluated, considering body weight, feed consumption, feed conversion ratio, and meat quality, the most favorable diet protein content was achieved with the 2nd group, with a rate of 19.60% during the growth period (11-22days) and a rate of 18.08% during the finishing period (23-37days). Keywords: Broiler; low protein diet; body weight; feed conversion ratio; meat quality