DL-蛋氨酸、L-蛋氨酸和蛋氨酸羟基类似物钙盐在肉鸡上的相对生物学效价及其抗氧化功能的研究

发布时间：2018-04-17 08:44

本文选题：DL-蛋氨酸羟基类似物钙盐 + DL-蛋氨酸　；参考：《西北农林科技大学》2015年硕士论文

【摘要】：本试验为了评定L-蛋氨酸(L-Met)和蛋氨酸羟基类似物钙盐(MHA-Ca)与DL-蛋氨酸(DL-Met)在肉鸡上的相对生物学效价,选取体重相近,健康状况良好的1280只10日龄的爱拔益加肉鸡用于饲养试验。所有试验肉鸡随机分组,总共分为16个处理组,每个处理组8个重复,每个重复10只鸡。以玉米-豆粕型日粮为基础,组成前期(10-21天)颗粒试验日粮和后期(22-42天)颗粒试验日粮。其中基础日粮中缺乏蛋氨酸和蛋氨酸+半胱氨酸。对照组日粮选择不添加任何蛋氨酸和蛋氨酸+半胱氨酸的基础日粮。其它的处理组在基础日粮的基础上分别添加0.03,0.06,0.10,0.15和0.21%的DL-Met或L-Met,或者添加等量的MHA-Ca。所有的试验日粮都采用冷压制粒。使用指数曲线模型,从体增重、饲料转化率(FCR)和胴体品质3个方面分析DL-Met、L-Met和MHA-Ca的相对生物学效价。以体增重为基础,MHA-Ca和L-Met相对DL-Met的相对生物学效价为46%和103%。以FCR为基础,MHA-Ca和L-Met相对DL-Met的相对生物学效价为58%和107%。除此之外,以胸肉产量为基础,比较3种不同形式蛋氨酸的相对生物学效价,MHA-Ca和L-Met相对DL-Met的相对生物学效价为81%和104%。与对照组相比,添加DL-Met、Met和MHA-Ca的处理组在胴体产量、胸肉产量、腿产量、腿肉产量和翅膀产量方面有差异(P0.05)。但是3种不同形式的蛋氨酸之间对胴体品质的影响差异不显著(P0.05)。对于氧化还原状态的测定,结果表明添加三种不同形式的蛋氨酸都能显著改善机体的氧化还原状态,且3种不同形式蛋氨酸对改善机体氧化还原状态的差异性并不显著(P0.05)。试验结果表明,就生长性能而言,DL-Met和L-Met具有相似的营养价值,而MHA-Ca与DL-Met和L-Met相比,相对生物学效价较低。3种不同形式的蛋氨酸都能够改善肉鸡机体氧化还原状态,3种不同形式的蛋氨酸之间的差异并不显著。
[Abstract]:In order to evaluate the relative biological titers of L-Met and MHA-Ca) and DL- methionine DL-Metas in broilers, 1280 10-day-old Ebariga broilers with similar body weight and good health were selected for feeding experiment.All the broilers were randomly divided into 16 treatment groups, 8 replicates in each treatment group and 10 chickens in each treatment group.On the basis of corn-soybean meal diet, the pellet test diet was formed in the early stage (10-21 days) and in the late stage (22-42 days).The basic diet was deficient in methionine and methionine cysteine.The control group chose the basal diet without adding any methionine and methionine cysteine.The other treatment groups added 0.03 ~ 0.06 ~ (0.10) ~ (0.15) DL-Met or L-Metals or the same amount of MHA-Ca. on the basis of basal diet, respectively.All the trial diets were pelletized under cold pressure.The relative biological titers of DL-Meta-L-Met and MHA-Ca were analyzed in terms of body weight gain, feed conversion rate and carcass quality using exponential curve model.Based on body weight gain, the relative biological titers of MHA-Ca and L-Met to DL-Met were 46% and 103% respectively.Based on FCR, the relative biological titers of MHA-Ca and L-Met against DL-Met were 58% and 107% respectively.In addition, based on the breast meat yield, the relative biological titers of MHA-Ca and L-Met against DL-Met were compared between MHA-Ca and L-Met in the three different forms of methionine. The relative biological titers of MHA-Ca and L-Met against DL-Met were 81% and 104% respectively.Compared with the control group, there were significant differences in carcass yield, breast meat yield, leg yield, leg meat yield and wing yield between the two groups.However, there was no significant difference in carcass quality between three different forms of methionine.For the determination of redox state, the results showed that three different forms of methionine could significantly improve the redox state of the body, and the difference of three different forms of methionine in improving the redox state was not significant (P 0.05).The results showed that DL-Met and L-Met had similar nutritional value in terms of growth performance, while MHA-Ca had similar nutritional value compared with DL-Met and L-Met.Lower relative biological titer of 3 different forms of methionine could improve the redox state of broilers. The difference of three different forms of methionine was not significant.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S831.5

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