氨基酸螯合铁对断奶仔猪生产性能及血液理化指标影响的研究
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摘要
为了比较氨基酸螯合铁对断奶猪生产性能、皮毛感观、血液理化指标、铁表观吸收率和组织器官铁水平的影响,选择28日龄初始体重(8.10±0.04)的杜×长×大断奶仔猪150头进行试验。试猪分为5个处理,每个处理3个重复,每个重复10头猪。采用玉米-豆粕型基础日粮。在基础日粮中添加100 mg/ kg无机铁(一水硫酸亚铁)构成对照组。在对照组基础上分别添加40、80、120、160 mg/kg氨基酸螯合铁构成4个试验组,试验期6周。
结果表明:试验1~3周,4~ 6周及全期,随着日粮中氨基酸铁添加量由0 mg/ kg增加到120 mg/kg,断奶仔猪日增重和饲料转化效率均得到显著改善。与对照组相比,添加120 mg/ kg氨基酸螯合铁试验组极显著地改善了平均日增重(P<0.01)和饲料转化效率(P<0.05);试验第21天和第42天,随着日粮中氨基酸螯合铁添加水平的增加,断奶仔猪对日粮中铁元素的表观消化率均呈显著的线性增加关系(P< 0. 05),添加120 mg/kg氨基酸螯合铁试验组铁元素的表观吸收率极显著高于对照组(P< 0.01);试验第21天和第42天,随着日粮中氨基酸螯合铁添加水平的提高,血红蛋白、血红蛋白含量、血清铁、肝脏铁、脾脏铁和血清转铁蛋白都呈显著高于对照组(P<0.05),而血清总铁结合力呈显著的线性降低关系(P < 0.05);在试验期末,120 mg/kg氨基酸螯合铁日粮组显著改善断奶仔猪的皮毛感观(P< 0. 05)。与添加硫酸亚铁相比,在断奶仔猪日粮中添加氨基酸铁螯合铁可提高断奶仔猪的生产性能和铁表观消化率,改善皮毛感观及血液生化指标。
The experiment was carried out to evaluate the effects of iron amino acid chelate on growth performance,iron apparent digestibility,skin color and blood index in weaned piglets, as compared to those of feed grade ferrous sulfate. One hundred and fifty weaned piglets(D×L×Y,28-day-old),with an average weight of(8.10±0.04) kg, were randomly allocated into five dietary treatments with three replicates(ten pins per pen).The control diet included 100 mg/kg iron from ferrous sulfate heptahydrate into the basal corn-soybean diet. The other dietary treatments were supplemented with 40, 80, 120, or 160 mg/kg of iron from ferrous amino acid complex in the control diet. Chromic oxide was included in the diets to act as the marker to determine the iron apparent digestibility. The results showed that the pigs fed iron-amino acid complex as an iron source had a statistically significant improvement in weight vain and feed conversion ratio. The monitored parameters, including mean red cell volume, hemoglobin concentration,serum iron and total iron binding capacity in the blood, value in skin color measurement increased singificantly as the level of iron-amino acid complex increased(P<0.05). Meanwhile, iron apparent digestibility was also increased significantly as the level of iron~amino acid complex increased(P<0.05).Therefore, the iron from iron-amino acid complex could improve growth performance and skin color more than ferrous sulfate supplementation in weaned piglets.
结果表明:试验1~3周,4~ 6周及全期,随着日粮中氨基酸铁添加量由0 mg/ kg增加到120 mg/kg,断奶仔猪日增重和饲料转化效率均得到显著改善。与对照组相比,添加120 mg/ kg氨基酸螯合铁试验组极显著地改善了平均日增重(P<0.01)和饲料转化效率(P<0.05);试验第21天和第42天,随着日粮中氨基酸螯合铁添加水平的增加,断奶仔猪对日粮中铁元素的表观消化率均呈显著的线性增加关系(P< 0. 05),添加120 mg/kg氨基酸螯合铁试验组铁元素的表观吸收率极显著高于对照组(P< 0.01);试验第21天和第42天,随着日粮中氨基酸螯合铁添加水平的提高,血红蛋白、血红蛋白含量、血清铁、肝脏铁、脾脏铁和血清转铁蛋白都呈显著高于对照组(P<0.05),而血清总铁结合力呈显著的线性降低关系(P < 0.05);在试验期末,120 mg/kg氨基酸螯合铁日粮组显著改善断奶仔猪的皮毛感观(P< 0. 05)。与添加硫酸亚铁相比,在断奶仔猪日粮中添加氨基酸铁螯合铁可提高断奶仔猪的生产性能和铁表观消化率,改善皮毛感观及血液生化指标。
The experiment was carried out to evaluate the effects of iron amino acid chelate on growth performance,iron apparent digestibility,skin color and blood index in weaned piglets, as compared to those of feed grade ferrous sulfate. One hundred and fifty weaned piglets(D×L×Y,28-day-old),with an average weight of(8.10±0.04) kg, were randomly allocated into five dietary treatments with three replicates(ten pins per pen).The control diet included 100 mg/kg iron from ferrous sulfate heptahydrate into the basal corn-soybean diet. The other dietary treatments were supplemented with 40, 80, 120, or 160 mg/kg of iron from ferrous amino acid complex in the control diet. Chromic oxide was included in the diets to act as the marker to determine the iron apparent digestibility. The results showed that the pigs fed iron-amino acid complex as an iron source had a statistically significant improvement in weight vain and feed conversion ratio. The monitored parameters, including mean red cell volume, hemoglobin concentration,serum iron and total iron binding capacity in the blood, value in skin color measurement increased singificantly as the level of iron-amino acid complex increased(P<0.05). Meanwhile, iron apparent digestibility was also increased significantly as the level of iron~amino acid complex increased(P<0.05).Therefore, the iron from iron-amino acid complex could improve growth performance and skin color more than ferrous sulfate supplementation in weaned piglets.
引文
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