Akademik Veri Yönetim Sistemi
KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.20, sa.1, ss.65-71, 2014 (SCI-Expanded)
This study was carried out to determine the effects of boric acid (17.5% boron) and ascorbic acid supplementation on performance, selected blood and bone parameters, carcass yield and malondialdehid (MDA) levels of broilers. The experiment lasted in 42 days. Totally 240 one-day old male Ross 308 broilers were housed at a density of 15 chickhens in each of 16 experimental plots using a completely randomized block experimental design. Diets were based on maize and soybean meal. Experimental groups divided into one control (CON) and 3 experimental groups. The experimental diets supplemented with 200 ppm ascorbic acid (AA) for the first group, 175 ppm boric acid (BA) for the second group and 200 ppm ascorbic acid plus 175 ppm boric acid combination (AABA) for the third group. At the end of experiment period there were statistically significant differences (P<0.05) between control and the treatment groups about body weight, body weight gain and feed conversion ratio for first 3 weeks of the experimental period, but there were no statistically different for feed intake. Carcass yield increased with additives especially with boron supplementation (P<0.05). Total protein, cholesterol, trigliseride concentration and ALT activity were not affected by addition of feed additives but AST activity increased in BA group while it was reducing in AA and AABA groups. There were also statistically significant differences for left tibia P levels (P<0.05) and plasma, liver MDA levels (P<0.001). There were no statistically significant differences between control and the treatment groups for tibia ash, Ca levels and some strength parameters. As a result; it can be concluded that boric acid and ascorbic acid supplementation did have positive effect on performance in 0-21 days of the experimental period and also on MDA levels about lipid peroxidation activity, bone mineralization and hot carcass yield studied in the experiment. It is inferred that it will be usefull if these feed additives are studied again at different levels and under different conditions.