اثر سطوح توازن كاتيون آنيون و پروتئين جيره بر عملكرد و فراسنجه هاي بيوشيميائي و هماتولوژي خون جوجه هاي گوشتي تحت تنش گرمائي

The effects of cation-anion balance and dietary protein levels on performance, biochemical and haematological parameters in broiler exposed to heat stress

This experiment was carried out to determine the effects of different levels of protein and electrolyte balance (DEB) on performance, biochemical and haematological parameters in Ross (308) broiler exposed to heat stress. In this experiment, 486, one-day old broilers were used in a completely randomized design with a 3x3 factorial arrangement with 3 replicate for a treatment. The diets were formulated according to NRC (1994) recommendation with protein levels (100, 90 and 80% of NRC recommendations) and electrolyte balance (200, 260 and 320 meqlkg). The birds were exposed to heat stress (34±30C) for 8 hours/day (10:00 to 18:00). The results of experiment indicated that body weight gain was significantly different in starter and in broilers fed containing 260 meqlkg DEB and protein (90%) were significantly higher than those fed other levels of DEB and protein, in all periods (starter, grower and total period). In comparison to 200 DEB, the level of 260 DEll increased body weight gain and feed intake in all periods (p