胱氨酸类硒源对产蛋鸡蛋品质、抗氧化能力和蛋中硒含量的影响

发布时间：2018-04-28 08:13

本文选题：蛋鸡 + 硒源　；参考：《动物营养学报》2017年05期

【摘要】：本试验旨在研究饲粮中添加硒代胱氨酸(SeC)、L-硒甲基硒代半胱氨酸(L-MSC)、L-硒代半胱氨酸(L-SeCys)和亚硒酸钠(SS)对产蛋鸡生产性能、蛋品质、抗氧化能力和蛋中硒含量的影响,以期为富硒鸡蛋的生产提供依据。选用26周龄体况良好、产蛋率接近的海兰灰蛋鸡450只,随机分为5个组,每组6个重复,每个重复15只鸡。对照组饲喂基础饲粮(不额外补充硒),其他4组饲粮在基础饲粮中添加0.30 mg/kg硒,分别来自SeC、L-MSC、L-SeCys和SS,各组饲粮中硒含量实测值分别为0.08(对照组)、0.36(SeC组)、0.35(L-MSC组)、0.31(L-SeCys组)和0.37(SS组)mg/kg。预试期1周,正试期4周。结果表明:1)与SS组和对照组相比,胱氨酸类硒源各组产蛋鸡的平均蛋重、产蛋率和料蛋比均无显著差异(P0.05)。L-SeCys组平均日采食量在试验1~2周时显著低于对照组(P0.05)。2)与SS组和对照组相比,胱氨酸类硒源各组产蛋鸡的蛋白高度、哈氏单位、蛋壳强度、蛋形指数、蛋黄和蛋白比例均无显著差异(P0.05)。试验第4周末,SS组蛋黄颜色显著高于其他各组(P0.05);SeC和SS组蛋壳厚度显著高于其他各组(P0.05),L-MSC和L-SeCys组蛋壳厚度显著高于对照组(P0.05);对照组蛋壳比例显著低于各试验组(P0.05)。3)与SS组和对照组相比,胱氨酸类硒源各组产蛋鸡的血浆谷胱甘肽过氧化物酶(GSH-Px)活性显著升高(P0.05);SeC和SS组血浆总超氧化物歧化酶(T-SOD)活性显著高于对照组(P0.05);胱氨酸类硒源各组血浆丙二醛(MDA)含量与SS组相比无显著差异(P0.05);对照组血浆总抗氧化能力(T-AOC)显著低于其他各组(P0.05),L-MSC组的血浆T-AOC最高,显著高于SS组(P0.05)。4)与对照组相比,饲粮中添加胱氨酸类硒源显著提高了蛋中硒含量(P0.05),其中L-MSC组最高;胱氨酸类硒源各组蛋中硒含量和硒转化率均高于SS组(P0.05)。由此可见,饲粮中添加3种胱氨酸类硒源可增强机体抗氧化水平,提高蛋中硒含量,其中SeC和L-MSC效果更好。
[Abstract]:The purpose of this study was to study the effects of selenocysteine (SEC) and sodium selenite (SSSS) on performance, egg quality, antioxidant capacity and selenium content in laying hens. In order to provide the basis for the production of rich selenium eggs. 450 Hailan grey laying hens with good body condition and similar laying rate at 26 weeks of age were randomly divided into 5 groups with 6 replicates in each group and 15 hens in each replica. The control group was fed with basic diet (no additional selenium supplement), the other four groups were fed with 0.30 mg/kg selenium in the basal diet, respectively from SeCL-MSCL-SeCys and SS.The measured values of selenium content in each diet were 0.08 (control group 0.36SEC 0.35L-MSC 0.31 L-SeCys) and 0.37(SS group 0.31L-SeCys (0.31L -SeCys) and 0.37(SS group respectively. The pretest period was 1 week and the positive test period was 4 weeks. The results showed that there was no significant difference in the average egg weight, laying rate and feed to egg ratio between the control group and the SS group. The average daily feed intake of the control group was significantly lower than that of the control group at the 2nd week of experiment (P 0.05), compared with the SS group and the control group. There was no significant difference in protein height, Hull unit, eggshell strength, egg shape index, yolk and protein ratio between the three groups. At the end of the 4th week of the trial, the yolk color of SS group was significantly higher than that of other groups (P0.05SEC and SS groups) and the thickness of egg shell of SS group was significantly higher than that of control group (P0.05), and that of control group was significantly lower than that of control group (P0.05N 路3) and SS. Compared with the control group, The plasma glutathione peroxidase (GSH-Px) activity of laying hens with cysteine selenium source was significantly higher than that of the control group (P0.05SeC and SS), and the content of malondialdehyde (MDA) in plasma of cystine selenium source groups was significantly higher than that of control group (P 0.05). There was no significant difference between SS group and control group (P 0.05), and the plasma total antioxidant capacity (T-AOC) in control group was significantly lower than that in other groups (P 0.05), and that in L-MSC group was the highest. Compared with the control group, the content of selenium in the eggs was significantly increased by adding cystine selenium in the diet, especially in the L-MSC group, and the content of selenium and the conversion rate of selenium in the eggs of the groups with cystine selenium were higher than those of the SS group. It can be seen that adding three kinds of cystine selenium into diet can enhance the antioxidant level and increase the selenium content in eggs, and SeC and L-MSC have better effect.
【作者单位】：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生物饲料开发国家工程研究中心;
【基金】：基金项目现代农业产业技术体系(CARS-41-K13) 家禽产业技术体系北京市创新团队(CARS-PSTP)
【分类号】：S831.5

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