不同月龄阉割对延边黄牛高档部位肌肉脂肪酸含量的影响

doi:10.16431/j.cnki.1671-7236.2021.12.014

Abstract

Abstract: The purpose of the experiment was to study the effects of castration at different months on the content of muscle fatty acids in three high-grade parts eye muscle, sirloin steak and upper brain of Yanbian Yellow cattle.50 healthy 6-month-old Yanbian Yellow cattle with similar body weight (150 kg±7.5 kg) were randomly divided into 5 groups, with 10 cattle in each group.The experimental group was castrated at 6, 8, 10 and 12-month-old (recorded as YG6, YG8, YG10 and YG12 groups), and the control group was not castrated (recorded as WYG).The experimental period was 24 months.The cattle were fed uniformly and freely.At the age of 30 months, the muscle samples of eye muscle, sirloin steak and upper brain were taken to determine the content of fatty acids.The results showed that:①Compared with WYG group, in eye muscle, the contents of C14∶1cis-9 in YG8 and YG12 groups were extremely significantly increased (P<0.01), while in YG6 and YG10 groups were significantly increased (P<0.05).The content of C18∶1cis-9 in YG6 group was significantly increased (P<0.05).The contents of C16∶0 in YG6 and YG10 groups were significantly decreased (P<0.05).The content of total saturated fatty acids was decreased in test groups (P>0.05), and the contents of total unsaturated fatty acids and total monounsaturated fatty acids were significantly increased in YG6 and YG10 groups (P<0.05).The content of total polyunsaturated fatty acids was extremely significantly increased in YG10 group (P<0.01), and were significantly increased in YG6, YG8 and YG12 groups (P<0.05).②Compared with WYG group, in sirloin steak, the contents of C14∶1cis-9, C16∶1cis-9 and stearic acid were significantly increased and the content of C16∶0 was significantly decreased in test groups (P<0.05).The content of C18∶1cis-9 was significantly increased (P<0.05) and the content of total saturated fatty acids was significantly decreased in YG6 group (P<0.05).The contents of total unsaturated fatty acids and total monounsaturated fatty acids were significantly increased in YG6 and YG10 groups (P<0.05).③Compared with WYG group, in upper brain, the content of C14∶0 in YG8 group was significantly decreased (P<0.05).The content of C16∶0 was extremely significantly increased (P<0.01) and the contents of total unsaturated fatty acids and total monounsaturated fatty acids were significantly increased in YG6 and YG10 groups (P<0.05).The content of total saturated fatty acids was significantly decreased in YG6 group (P<0.05).In conclusion, castration could increase the content of unsaturated fatty acids and reduce saturated fatty acids in high-grade parts of Yanbian Yellow cattle.The ratio of unsaturated fatty acids to saturated fatty acids in 6-month-old castration group was the highest.

Key words: Yanbian Yellow cattle; castration; fatty acid; eye muscle; sirloin steak; upper brain

CLC Number:

S815.2

LIU Tian, GAO Qingshan, LI Xiangzi, YAN Changguo. Effects of Castration at Different Months on Fatty Acid Content in Muscle of High-grade Parts of Yanbian Yellow Cattle[J]. China Animal Husbandry and Veterinary Medicine, 2021, 48(12): 4460-4467.

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Effects of Castration at Different Months on Fatty Acid Content in Muscle of High-grade Parts of Yanbian Yellow Cattle

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