Akademik Veri Yönetim Sistemi
Black Sea Journal of Agriculture, cilt.6, sa.2, ss.157-163, 2023 (Hakemli Dergi)
Aim of the study was to evaluate the effects of diet non-phytate phosphorus (P) and calcium (Ca) level on growth performance and some blood, bone and faeces parameters of broilers. A total of 480 one-day-old Ross 308 broilers were randomly allocated to 3 dietary treatments with 5 replicates for a 42-d study. Corn-soybean meal based diets were consisted of three different Ca and P concentrations for starter and grower periods. High, medium and low Ca and P levels in starter and grower periods were 1.05-0.49, 0.95-0.44, 0.85-0.41% and 0.87-0.42, 0.78-0.38, 0.69-0.34%, respectively. After the first 21-d feeding period, no differences were observed for feed intake (FI) but body weight (BW) and feed conversion ratio (FCR) were higher (P<0.05) in group fed 0.85-0.41% Ca and P. Diet with low Ca and P tended to increase final body weight of the chicks at 42 days old. No differences were observed for FI, FCR and mortality among the treatments. Different Ca and P levels had no effect on internal organ weights (P>0.05). Fecal ash, tibia and sternum weight and sternum ash were not affected from the Ca and P concentrations but tibia ash was lower (P<0.05) in group having low concentration of Ca and P. Decreasing levels of Ca and P had a negative effect on relative breast meat weight (P<0.05). There were no significant differences in Ca, P concentrations and aspartate transaminase (AST), alanine transaminase (ALT) activities in blood serum (P>0.05). However, alkaline phosphatase (ALP) enzyme activity was higher (P<0.05) in group having medium levels of Ca and P. Based on the data, it can be concluded that 8.5 g/kg Ca and 4.1 g/kg P can be used for starter period without any deterioration on growth performance.