The Effects Of Iron-amino Acid Complex Together With Inorganic Iron On The Growth Performance And Blood Indexes Of Weaned Piglets

This study investigated the effects of iron-amino acid complex together with inorganic iron on the growth performance, skin, and blood indexes of weaned piglets (28 d of age), the study included two experiments. Experiment 1 studied the differences of iron-amino acid complex and inorganic iron on the performance, skin, and blood indexes of weaned piglets mostly. Experiment 2 studied that when inorganic iron had satisfied the weaned piglets, the effects of the iron-amino acid complex on the growth performance, skin, and blood indexes of piglets mostly.Experiment 1: 92 piglets (D×L×Y, 28 d of age) were distributed randomly into 5 treatments, the treatment 1-4 had 5 replications each , 4 piglets per replication, the treatment 5 had 4 replications, 3 piglets per replication. The diets of treatment 1-5 were added FeSO₄+iron-amino acid complex (unit: mg/kg)respectively: 0 + 0, 100 + 0, 220 + 0,100 + 120 , 0 + 100. The blood indexes measured included Hg, Hct, RBC in blood, and Fe, Cu, Zn, Urea, Glu in serum. The results indicated: 1 , The 100mg/kg inorganic iron in the diets can keep the normal growth performanceand fit physiological states of weaned piglets, the Hg, Hct, and RBC all werenormal. 2, Tron-amino acid complex can improve the growth performance of weaned piglets.Comparing with 100mg/kg inorganic iron, the iron-amino acid complex of the sameamount increased the ADG of 1-5 week (8.7%) , decreased the F/G of 1-5 week (7.73%)very significantly, decreased the diarrhea ratio(16.7%), did not influencethe blood indexes significantly. 3 , The effects of using inorganic iron together with iron-amino acid complex werebetter than using inorganic iron only, the ADG of 1-5 week increased (8.9%) , theF/G decreased significantly(6.16%), and the diarrhea ratio decreased very significantly (64.80%), but the blood indexes had no significant differences in 5 treatments.4> The 120mg/kg iron-amino acid complex in the diets that already contained lOOmg/kg inorganic iron can increased the growth performance still, the ADG increased(6.4%), the F/G decreased significantly(4.3%), and the diarrhea ratio decreased(36.7%), but the blood indexes had no significant differences in 5 treatments.5 ?, The iron-amino acid complex can increased the scores of skin in the 5 week very significantly.Experiment 2: 100 piglets (DxLxY, 28 d of age ) were distributed randomly into 5 treatments, 5 replications per treatment, 4 piglets per replication. The diet of treatment 1 contained FeSC>4 100 mg/kg, the diets of treatment 2-5 were respectively added iron-amino acid complex 30, 60, 90, 120mg/kg on the basis of the diet of treatment 1. All the indexes were same as that in experiment 1. The results indicated:1 n The iron-amino acid complex can increase the growth performance still when inorganic iron had content the need of piglets. At each phase the ADGs of the treatment 2⁵ were all more than the ADG of the treatment 1, the F/Gs were less. Especially the ADGs ofl-3 week, 1-4 week, and 1-5 week increased significantly, and the F/Gs decreased significantly.2^ The best dose of iron-amino acid complex on the growth performance was 72⁷3mg/kg.3^he iron-amino acid complex can improve the impressions of piglet' skin, the effect was enhanced as the dose increased within 30¹20mg/kg.4^ When the inorganic iron had satisfied the weaned piglets, the 30¹20mg/kg iron-amino acid complex did not influence the blood indexes significantly, which kept the normal state of blood.