The effect of some different levels of iron from phosphate glass fritte with microelements used in broiler chicken feeding

摘要

In this experiment the effect of some lower Fe doses with 75% (at experimental lot 1) and respectively with 87.5% (at experimental lot 1) comparatively with the NRC 1994 recommendation but provided by special phosphate glass fritte (PM-BC 119) on the nutritive, bioproductive of broiler were determinated. The experiment was done on six month length, respectively from hatchering to 6 weeks old using 266 broilers, divided in two experimental lots, respectively 133 chickens each lot. The hybrid used was HYBRO. At both experimental lot data of fodder intake are comparable between. The differences were lower above 0.5% at experimental lot 2comparatively with experimental lot 1. The differences of weight recorded between lots are not statistical ensured so the different level of Fe had no significant influence on the weight. On all experimental period the experimental lot 2 recorded a specific fodder intake lower with 0.33% than experimental lot 1. At experimental lot 2 at which the Fe level was provided by frita with 50% lower the hemoglobin value from blood was lower with above 15 comparatively with experimental lot 1. At experimental lot 1 at which the Fe level was bigger (20 mg/kg fodder) the Fe content from ash was bigger with 5.1% comparatively with experimental lot 2 at which the Fe level ensured by mineral premix was provided at 10 mg/ kg of fodder.