Effects of Fe-soy Proteinate Chelate Supplementation to Diets of Periparturient Sows and Piglets on the Fe Level in the Blood of Piglets

摘要

The objective of the present study was to investigate the effects of Fe-soy proteinate chelate (Fe-SP) on sows milk, piglet blood parameters and performance. A total of 15 sows of 3 wk before parturition and pigs after births to 3 wk were assigned tothree dietary treatments: control (sow-basal diet, piglets with Fe injection); Fe-SP 100 (Fe 100 ppm as Fe-SP in sow and piglet diet); Fe-SP 200 (Fe 200 ppm as Fe-SP in sow and piglet diet). Each treatment had 5 replicates (sows) of six piglets per sow randomly selected from the same offspring. For this experiment, Fe-SP was manufactured. There were no significant differences among treatments in number of pigs born in total or alive per litter, birth weight, number of pigs weaned per litter and weaningweight. However, weight gain, feed intake and feed conversion ratio significantly (p<0.05) decreased as the supplementation level of Fe-SP increased. There were no significant differences among treatments in Fe content at 3 wk before parturition in sow blood. However, Fe content at 2 wk before parturition in sow blood significantly (p<0.05) increased as the supplementation of Fe-SP. While there were no significant differences among treatments in Fe content at 1 wk before parturition in sow blood, it tended to increase as the supplementation level of Fe-SP increased. There were no significant differences among treatments in Fe content^of-sow milk. However, it tended to increase as the supplementation level of Fe-SP increased. Iron content in the blood of piglets was significantly (p<0.05) higher in control (Fe injected) than Fe-SP 100 and Fe-SP 200 treatments at 1st and 2nd wk but it was significantly higher in Fe-SP 200 than others in 3rd wk. Zinc content in the blood also significantly (p<0.05) increased as the Fe-SP supplementation level increased in 3rd wk. In conclusion, Fe-SP supplementation significantly affected Fe content in the blood of piglets. Iron injection was more effective at 1st and 2nd wk, while Fe-SP 200 supplementation was effective at 3rd wk in improving blood Fe level in piglets.