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Effect of steam-flaked corn and soybeans on muscle and intramuscular fatty acid composition in Holstein calves

文献类型： 外文期刊

作者： Zhang, Y. Q. 1 ; He, D. C. 1 ; Meng, Q. X. 2 ; Wang, D. C. 1 ;

作者机构： 1.Shanxi Acad Agr Sci, Inst Anim Husb & Vet Sci, Taiyuan 030032, Peoples R China

2.China Agr Univ, State Key Lab Anim Nutr, Beef Cattle Res Ctr, Beijing 100094, Peoples R China

3.China Agr Univ, Coll Anim Sci & Technol, Beijing 100094, Peoples R China

关键词： calves;corn;fatty acid;intramuscular;processing;soybean

期刊名称：JOURNAL OF ANIMAL SCIENCE （ 影响因子：3.159； 五年影响因子：2.912 ）

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收录情况： SCI

摘要： This study aimed to evaluate the effects of steam-flaked corn grains and soybeans on muscle fatty acid composition. Thirty Holstein bull calves (21 +/- 3 d) were divided into 3 groups according to birth date and BW and were randomly assigned to receive fresh milk and a commercial pelleted starter diet containing extruded corn and soybean (ECS), steam-flaked corn and soybean (SFCS), or ground corn and raw soybean (GCS). The calves were fed the designated diet from 3 to 13 wk of age, after which they were slaughtered. The supraspinatus (CTM), longissimus lumborum (RLM), and spinalis dorsi (ERM) were analyzed to determine the chemical and intramuscular fatty acid composition. The fatty acid composition of muscle and its deposition differed among calves fed different starter feeds. Medium-chain fatty acid levels of the RLM and CTM were greater in GCS-fed calves than in ECS- and SFCS-fed calves (P < 0.05). Extruded processing increased the content of linoleic, linolenic, and arachidonic acids of the RLM (P < 0.05). The palmitoleic and trans-vaccenic acid content of the ERM were greater in GCS-fed calves than in ECS-or SFCS-fed calves (P < 0.05). No significant differences were observed among the 3 diets with respect to the stearic, oleic, linoleic, cis-9 trans-11 CLA, or arachidonic acid content of the ERM (P > 0.05). The levels of n-3 and n-6 fatty acids were similar among the 3 groups; a lower n-6: n-3 PUFA ratio was observed in GCS-fed calves (P < 0.05). The cereal processing method of the calf starter feed had no significant effect on the chemical composition of the CTM, RLM, or ERM. Therefore, different methods of processing corn and soybean in calf starter feeds had no effect on the chemical composition of the RLM, CTM, or ERM but had a significant effect on the intramuscular fatty acid composition.

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