Vieira D V G, Costa F G P, Lima M R, Júnior J G de V, Bonaparte T P, Cavalcante D T
Federal University of Tocantins, Araguaina, Brazil.
Federal University of Paraiba, Areia, Brazil.
J Anim Physiol Anim Nutr (Berl). 2018 Apr;102(2):e686-e694. doi: 10.1111/jpn.12813. Epub 2017 Oct 26.
An experiment was performed using 1,000 laying Japanese quails to assess the availability of two alternative dietary methionine sources. Treatment 01 = Basal Feed that is deficient in digestible methionine + cystine (Met + Cys). The other treatments were constituted by Met + Cys levels of 0.8, 1.60 and 2.40 g/kg, supplemented with DL-Methionine-99%, HMTBA-88% and HMTBA-84%, being 10 treatments in total. The following characteristics were studied: feed intake (g/bird/day), egg production (egg/day × 100), egg weight (g/egg), egg mass (g/egg), feed conversion per egg dozen (kg feed/dozen eggs), feed conversion per egg mass (kg feed/kg eggs), relative yolk weight (g/100 g of egg), relative albumen weight (g/100 g of egg), relative shell weight (g/100 g of egg), shell thickness (mm) and specific gravity (g/cm ). In general result comment, supplemental methionine sources must be included in the poultry diet. The different methionine sources affect the performance of quails, and the increase in the levels within each source improves the performance variables. Significant effect was observable on performance variables and egg quality variables, being that DLM-99% is superior to the other sources. The HMTBA-88% source is superior to the HMTBA-84% source for the same aforementioned variables. In conclusion, the bioefficacy values of the HMTBA-88% and HMTBA-84% sources compared to the DLM-99% source on an equimolar basis were 81 and 79%, respectively, for the performance variables, and 83 and 74 while the methionine sources were equivalent for the variables related to egg quality.
使用1000只产蛋日本鹌鹑进行了一项实验，以评估两种替代膳食蛋氨酸来源的有效性。处理01 = 缺乏可消化蛋氨酸 + 胱氨酸（Met + Cys）的基础饲料。其他处理由0.8、1.60和2.40 g/kg的Met + Cys水平组成，分别补充99%的DL-蛋氨酸、88%的羟基蛋氨酸钙和84%的羟基蛋氨酸钙，总共10个处理。研究了以下特征：采食量（克/只/天）、产蛋量（枚/天×100）、蛋重（克/枚）、蛋质量（克/枚）、每打鸡蛋的饲料转化率（千克饲料/打鸡蛋）、每单位蛋质量的饲料转化率（千克饲料/千克鸡蛋）、相对蛋黄重（克/100克鸡蛋）、相对蛋白重（克/100克鸡蛋）、相对蛋壳重（克/100克鸡蛋）、蛋壳厚度（毫米）和比重（克/立方厘米）。总体结果表明，家禽日粮中必须包含补充蛋氨酸来源。不同的蛋氨酸来源会影响鹌鹑的生产性能，且每种来源中水平的增加会改善生产性能变量。在生产性能变量和蛋品质变量上可观察到显著影响，即99%的DL-蛋氨酸优于其他来源。对于相同的上述变量，88%的羟基蛋氨酸钙来源优于84%的羟基蛋氨酸钙来源。总之，在等摩尔基础上，与99%的DL-蛋氨酸来源相比，88%和84%的羟基蛋氨酸钙来源在生产性能变量方面的生物效价分别为81%和79%，而在与蛋品质相关的变量方面，当蛋氨酸来源相当时，生物效价分别为83%和74%。
