摘要
本试验旨在探讨缺铁性仔猪模型建立及补充酵母铁或硫酸亚铁后仔猪生长发育、血液指标变化情况和内脏器官铁含量的影响。本试验选择21日龄、初始体重(5.57±0.83)kg的D×L×Y断奶仔猪35头,分为7个处理,每个处理5个重复,每个重复1头猪。仔猪单栏饲养。用铁含量为22.43 mg/kg的基础日粮饲喂4周以耗竭体内储备铁。耗竭期结束后,试验期对照组继续饲喂基础日粮,6个试验组日粮分别在基础日粮中添加铁含量为80、120和180 mg/kg的酵母铁或硫酸亚铁,饲喂10 d。结果表明:仔猪经28 d耗竭后形成缺铁模型。当酵母铁组铁含量为120 mg/kg时,仔猪ADG和ADFI最高,日粮铁的来源和水平的交互作用对ADG和F/G影响显著(P<0.05)。铁的来源和水平对仔猪各项血常规和生理生化指标影响不显著(P>0.05)。120 mg/kg酵母铁或硫酸亚铁组脾脏、肝脏、肾脏和心脏铁含量均极显著高于对照组(P<0.01),且120 mg/kg硫酸亚铁组在脾脏、肝脏和心脏中的铁含量均极显著高于酵母铁组(P<0.01)。酵母铁组的ADG、ADFI、铁蛋白和转铁蛋白较硫酸亚铁组高。由结果可知,补充酵母铁和硫酸亚铁可以改善缺铁情况,且酵母铁的效果优于硫酸亚铁。
This study was to explore the establishment of model of iron deficiency in weanling piglet and to observe the change of growth performance, blood biochemical indices and the iron content of the organ after supplementation iron-enriched yeast or ferrous sulfate. Thirty-five 21-day-old weanling D× L× 5（ piglets with an average weight of （5.57 ± 0.83） kg, were randomly allocated into 7 groups with 5 replicates （1 pig per replicate）, and piglet was fed in single cage. Piglets were fed the basal diet included 22.43 mg/kg iron for 4 weeks to consume reserving iron in body. After iron was exhausted, piglets in control group were fed the basal diet continuously, and piglets in 6 trial groups were fed the basal diet supplemented with 80, 120 and 180 mg/kg iron either from iron-enriched yeast or ferrous sulfate during trial period. The trial duration was 10 days after 28 days depletion period. The results showed that piglets＇ model of iron deficiency was successfully established after 28 days. When iron concentration was 120 mg/kg, ADG and ADFI of piglets were the highest in all groups. There were significant effects on interactions of iron sources and levels on ADG and F/G （P〈0.05）. There were no significant effects on interactions of iron sources and levels on blood routine and blood biochemical indices （P〉0.05）. Both iron-enriched yeast or ferrous sulfate of 120 mg/kg iron concentration significantly increased iron content in the internal organs, including spleen, liver, kidney and heart compared with control group （P〈0. 01） ; while iron concentration in ferrous sulfate with 120 mg/kg iron group significantly higher than that in iron-enriched yeast group （P〈0.01）. ADG, ADF1, serum ferritin and transfertin in iron-enriched yeast group were higher than those in ferrous sulfate group. In conclusion, both iron-enriched yeast and ferrous sulfate could improve the state of iron deficiency, and effect of iron-enriched yeast was better than that of ferrous sulfate.
出处
《动物营养学报》
CAS
CSCD
北大核心
2009年第6期897-902,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
四川省生物饲料专项(07SG111-008)
关键词
酵母铁
硫酸亚铁
仔猪
缺铁模型
Iron-enriched yeast
Ferrous sulfate
Piglets
Model of iron deficiency
