饲粮中添加氨基酸络合铁对生长肥育猪生长性能、血液指标、肝脏铁沉积和肉质性状的影响  

Effects of Dietary Amino Acid Chelated Iron on Growth Performance,Blood Indices,Liver Iron Deposition and Meat Quality Traits of Growing⁃Finishing Pigs

作　　者：陶新[1] 邓波[1] 袁启志 冀飞 吴杰[1] 门小明[1] 李永明[1] 徐子伟[1] TAO Xin;DENG Bo;YUAN Qizhi;JI Fei;WU Jie;MEN Xiaoming;LI Yongming;XU Ziwei(Institute of Animal Husbandry and Veterinary Science,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;Zinpro Corporation,Eden Prairie 55344,USA)

机构地区：[1]浙江省农业科学院畜牧兽医研究所,杭州310021 [2]美国金宝公司,伊登普雷利55344

出　　处：《动物营养学报》2023年第8期4932-4945,共14页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：浙江省重点研发计划(2021C02007,2021C02068-3);浙江省农业重大技术协同推广计划(2021XTTGXM03-1);国家现代农业产业技术体系。

摘　　要：本试验旨在研究饲粮中添加不同水平氨基酸络合铁对生长肥育猪生长性能、血液指标、肝脏铁沉积和肉质性状的影响。选取体况良好、平均体重为(24.10±2.43)kg的“杜长大”三元杂交猪216头,随机分为6个组,每组6个重复,每个重复6头猪(公母各占1/2)。对照组(空白对照)饲喂不添加任何铁源的基础饲粮;FeSO_(4)组(阳性对照)在基础饲粮中添加60 mg/kg Fe_(S)O_(4)(以铁计);其余4个试验组分别在基础饲粮中添加15、30、45和60 mg/kg氨基酸络合铁(均以铁计)。试验期110 d,按试验猪体重分为25~50 kg、51~85 kg和86~120 kg等3个生长阶段。结果表明:1)与对照组和FeSO_(4)组相比,饲粮中添加不同水平氨基酸络合铁对各体重阶段及试验全期试验猪生长性能均无显著影响(P>0.05)。但在86~120 kg阶段和试验全期,随着氨基酸络合铁添加水平的提高,试验猪平均日增重(ADG)呈线性提高(P<0.05)。2)在50 kg时,与对照组相比,饲粮中添加30、45和60 mg/kg氨基酸络合铁均极显著提高试验猪血液平均红细胞血红蛋白(MCH)含量和平均红细胞体积(MCV)(P<0.01);在85 kg时,与对照组相比,饲粮中添加30、45和60 mg/kg氨基酸络合铁显著或极显著提高血液血红蛋白(HGB)含量(P<0.05)、MCH含量(P<0.01)和MCV(P<0.01);在120 kg时,与对照组相比,饲粮中添加30、45和60 mg/kg氨基酸络合铁均极显著提高血液MCH含量(P<0.01),饲粮中添加45和60 mg/kg氨基酸络合铁均极显著提高血液MCV(P<0.01)。同时,随着氨基酸络合铁添加水平的提高,各体重阶段试验猪血液MCH含量和MCV呈线性提高和二次变化(P<0.01)。此外,除15 mg/kg氨基酸络合铁添加组外,其他水平氨基酸络合铁添加组试验猪血常规指标与FeSO_(4)组无显著差异(P>0.05)。3)与对照组相比,饲粮中添加不同水平氨基酸络合铁均极显著提高生长肥育猪肝脏铁含量(P<0.01),且随着氨基酸络合铁添加水平的提高,肝脏铁含量呈线�This experiment was conducted to investigate the effects of different supplemental levels of amino acid chelated iron on growth performance,blood indices,liver iron deposition and meat quality traits of grow⁃ing⁃finishing pigs.A total of 216 healthy“Duroc×Landrace×Yorkshire”crossbred pigs with an average body weight of(24.10±2.43)kg were randomly divided into 6 groups with 6 replicates per group and 6 pigs per replicate(half male and half female).Pigs in the control group(blank control)were fed a basal diet without any iron additive,those in FeSO_(4) group(positive control)were fed the basal diet supplemented with 60 mg/kg FeSO_(4)(calculated as iron),and those in the other 4 experimental groups were fed the basal diet supplemented with 15,30,45 and 60 mg/kg amino acid chelated iron(all calculated as iron),respectively.The experiment lasted for 110 days,and the pigs were divided into three growth stages according to the body weight of 25 to 50 kg,51 to 85 kg and 86 to 120 kg.The results showed as follows:1)compared with the control group and FeSO_(4) group,different supplemental levels of amino acid chelated iron had no significant effects on growth per⁃formance of pigs at each body weight stage and the whole experiment period(P>0.05).However,the average daily gain(ADG)was linearly increased with the increase of amino acid chelated iron supplemental level in 86 to 120 kg stage and the whole experiment period(P<0.05).2)At 50 kg,compared with the control group,the supplementation of 30,45 and 60 mg/kg amino acid chelated iron extremely significantly increased the mean corpuscular hemoglobin(MCH)content and mean corpuscular volume(MCV)in blood of experimental pigs(P<0.01);at 85 kg,compared with the control group,the supplementation of 30,45 and 60 mg/kg a⁃mino acid chelated iron significantly or extremely significantly increased the hemoglobin(HGB)content(P<0.05),MCH content(P<0.01)and MCV(P<0.01)in blood;at 120 kg,compared with the control group,the supplementation of 30,45 and 60 mg/kg amino acid ch

关 键 词：氨基酸络合铁 猪 生长性能 血常规指标 铁沉积 肉质性状 

分 类 号：S816[农业科学—饲料科学]