斜率比法评定肉仔鸡对氨基酸螯合锰的相对生物学利用率  

Evaluation of Relative Bioavailability of Amino Acid Chelate Manganese with Slope Ratio Method for Broilers

作　　者：杨斌[1] 蔡辉益[1] 刘国华[1] 常文环[1] 郑爱娟[1] 张姝[1] 娄瑞颍[1] 陈桂兰[1] 

机构地区：[1]中国农业科学院饲料研究所,农业部饲料生物技术重点开放实验室,北京100081

出　　处：《动物营养学报》2014年第8期2110-2117,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金："十二五"国家科技支撑计划课题(2011BAD26B03)

摘　　要：锰是家禽饲粮中的必需微量元素,但不同锰源的生物学利用率有较大差异,准确评定生物学利用率是有效利用锰源的前提。本试验将1 440只1日龄爱拔益加(AA)雄性肉仔鸡随机分为16组(每个组设6个重复,每个重复15只),分别饲喂基础饲粮和在基础饲粮中添加不同锰源(硫酸锰、氨基酸螯合锰A和氨基酸螯合锰B)和锰添加水平(5、10、15、20和40 mg/kg)的15种试验饲粮,试验期21 d。结果表明:肉仔鸡基础饲粮中添加锰显著提高肉仔鸡的生长性能并降低死亡率(P<0.05),锰添加水平显著影响末重、平均日增重、平均日采食量、料肉比和死亡率(P<0.05);但锰源对生长性能不存在显著影响(P>0.05)。饲粮中添加锰显著增加、无脂干重锰含量和灰分锰含量,且呈明显的剂量效应(P<0.05)。与硫酸锰相比,2种有机锰均极显著提高胫骨无脂干重锰含量(P<0.01)。综上,采用斜率比法估测的氨基酸螯合锰A和氨基酸螯合锰B的相对生物学利用率分别为136%和143%(以胫骨无脂干重锰含量为指标)或114%和144%(以胫骨灰分锰含量为指标)。Manganese（ Mn）is an essential trace element that must be added in poultry diet,but there are big differences of bioavailability between different Mn sources. Accurate evaluation of bioavailability is the precon-dition of effective utilization of Mn source. A total of 1 440 Arbor Acres（ AA）male broilers were randomly divided into 16 groups（ each group set 6 replicates,and 15 broilers per replicate）,fed a basal diet and other 15 experimental diets of the basal diet with different Mn adding levels（ 5,10,15,20,and 40 mg/kg）and Mn sources（MnSO4,manganese amino acid chelate A and manganese amino acid chelate B）,respectively. The experiment lasted for 21 days. The results showed that adding Mn in broiler diets significantly improved fi-nal body weight,average daily gain,average daily feed intake and feed to gain ratio of broilers and reduced mortality（P〈0.05）,and Mn adding level significantly influenced the growth performance（P〈0.05）,but there was no significant difference between different Mn sources（ P〉0.05）. Adding Mn significantly increased the,Mn content in defatted dry weight and ash of tibia,and formed significant dose effect（ P〈0.05）. Com-pared with MnSO4,the 2 kinds of organic Mn were significantly improved Mn content in defatted dry weight and ash of tibia（ P〈0.05）. Using the slope ratio method to estimate the relative bioavailability of manganese a-mino acid chelate A and manganese amino acid chelate B are 136% and 143%（ based on Mn content in defat-ted dry weight of tibia）or 114% and 144%（ based on Mn content in tibia ash）,respectively.

关 键 词：锰 生物学利用率 肉仔鸡 生长 胫骨 

分 类 号：S816.72[农业科学—饲料科学] S831.5[农业科学—畜牧学]