摘要
Objective: This study was conducted to produce and evaluate protected amino acids (AAs) against degradation in the rumen with greater bioavalibility and without the problems associated with polymer coating and the effect this has on calf performance. Materials and Methods: In the first step, essential AAs methionine and lysine were reacted with two chemical compounds (Benzaldehyde and Glutaraldehyde) in an attempt to make ligands for producing protected AAs. The physico-chemical characterization, melting point, and mass spec-trometric of products were estimated. These products were fed to 36 Holstein dairy calves with 110 ± 0.50 kg of average body weight and an age of 110 ± 10 days. Calves were randomly assigned to six treatments. This study was done with six treatments as a completely randomized one-way design. Results: Feed consumption and average daily gain were less for control animals and those fed methionine and lysine glutaraldehyde compared to other treatments. The largest chewing time was observed for methionine and lysine glutaraldehyde, respectively, and the least was control. There was no difference for energy consumption, dry matter intake, or blood metabolites among the six treatments. The greatest total protein content was related to methionine and lysine glutar-aldehyde treatment and the least total protein was observed in control treatment. Conclusion: It can be concluded that the use of chemical methods to protect AAs can be applied and may have some beneficial effects. Adv. Vet. Anim. Res., 7(2): 229-233, June 2020
摘要译文
目的：进行该研究，以产生和评估瘤胃中瘤胃中的降解的受保护的氨基酸（AAS），并且没有与聚合物涂层相关的问题，这对CALF性能有关。材料和方法：在第一步中，必需的AAs甲硫氨酸和赖氨酸与两种化学化合物（苯甲醛和戊二醛）反应，试图制备用于产生保护AA的配体。估计了物理化学表征，熔点和质谱。将这些产品送至36至36个荷斯坦乳制品犊牛，平均体重110±0.50千克，年龄为110±10天。小牛随机分配到六个治疗方法。本研究采用六种治疗方法作为完全随机化的单向设计进行。结果：对照动物的饲料消耗和平均每日收益较少，与其他治疗相比，对照动物和喂养蛋氨酸和赖氨酸戊二醛的每日增益较少。对于甲硫氨酸和赖氨酸戊二醛观察到最大的咀嚼时间，并且最少是对照。六种治疗中的能量消耗，干物质摄入或血液代谢物没有差异。最大的总蛋白质含量与甲硫氨酸和赖氨酸谷蛋白 - 醛处理，并且在对照处理中观察到最少的总蛋白质。结论：可以得出结论，可以应用使用化学方法来保护AAS，并且可能具有一些有益的效果。 adv。兽医。动画。 res，7（2）：229-233，6月2020年6月
Mitra Mazinani [1]; Abbas Ali Naserian [1]; Brian J Rude [2]; Abdol Mansour Tahmasbi [1]; Reza Valizadeh [1]. Effects of feeding rumen–protected amino acids on the performance of feedlot calves[J]. Journal of Advanced Veterinary and Animal Research, 2020,7(2): 229-233