随着肉牛育肥生产体系的发展，异地育肥牛越来越多，追溯牛的生活史显得日益重要。稳定性同位素指纹分析是用于肉牛产地及其膳食组成追溯的有效方法之一，牛尾毛是用于追溯牛生活史的一种可能材料。本项目主要通过在内蒙、陕西和河南三个地域人工转运喂养牛的模型试验，分析同一地域不同季节和不同地域转移迁徙喂养的牛尾毛中稳定性碳、氮、氢同位素组成随地域、季节、饲料种类等因素变化的机理，比较不同段位牛尾毛中稳定性同位素组成的差异，确认不同段位牛尾毛中稳定性碳、氮、氢同位素组成是否进行交换，利用它们是否可追溯牛的地域生活史和饲料喂养史。结果表明，不同段位牛尾毛中的稳定性碳、氮、氢同位素组成与喂养地域和饲料密切相关，不同段位之间的稳定性同位素指纹不进行交换，可反映出肉牛生长地域和喂养饲料的变化。本研究为肉牛生活史追溯技术建立提供科学理论支撑，对促进我国牛肉质量安全追溯技术体系的建立和完善具有重要意义。

Traceability of cattle feeding history becomes increasingly important with the development of fatten system and the increase of cattle fattened in allopatry. Stable isotope fingerprint analysis is considered as one of effective methods for traceability of beef origin and their feeding system, and cattle tail hair can be used as one potential material for traceability of their feeding history. In this project, cattle transfer-feeding model experiment was carried out in three study regions including Taipusi Banner in Inner Mongolia Autonomous Region, Yangling in Shaanxi Province and Nanyang City in Henan Province. Carbon, nitrogen and hydrogen isotope compositions in cattle tail hair that were transfer-fed in different seasons at the same region and in different regions were determined, to analysis their change mechanisms with the variations of origin, season and feeding type. Furthermore, the difference of stable isotope compositions in different segments of cattle tail hair were compared, and whether the exchange was existed among the different segments and their possibility for tracing the origin and feeding history of cattle were verified. The results showed that carbon, nitrogen and hydrogen stable isotope compositions in different segments of cattle tail hair were closely related to their feeding origin and feeds. In addition, exchange of stable isotopes in the different segments were not found, therefore it can reflect the change of cattle feeding origin and their feeds. This study will supply the scientific theory support for establishing traceability techniques of cattle feeding history, and play an important role in promoting the establishment and perfection of beef safety traceability technique system in China.

随着肉牛育肥生产体系的发展，异地育肥牛越来越多，追溯牛的生活史显得日益重要。稳定性同位素指纹分析是用于肉牛产地及其膳食组成追溯的有效方法之一，牛尾毛是用于追溯牛生活史的一种可能材料。本项目主要通过在内蒙、陕西和河南三个地域人工转运喂养牛的模型试验，分析同一地域不同季节和不同地域转移迁徙喂养的牛尾毛中稳定性碳、氮、氢同位素组成随地域、季节、饲料种类等因素变化的机理，比较不同段位牛尾毛中稳定性同位素组成的差异，确认不同段位牛尾毛中稳定性碳、氮、氢同位素组成是否进行交换，利用它们是否可追溯牛的地域生活史和饲料喂养史。结果表明，不同段位牛尾毛中的稳定性碳、氮、氢同位素组成与喂养地域和饲料密切相关，不同段位之间的稳定性同位素指纹不进行交换，可反映出肉牛生长地域和喂养饲料的变化。本研究为肉牛生活史追溯技术建立提供科学理论支撑，对促进我国牛肉质量安全追溯技术体系的建立和完善具有重要意义。