| 阉割对公猪生长性能和胴体品质的影响 |
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| 引用本文： | 蔡兆伟,赵晓枫,姚玉昌,张立凡,赵春江,徐宁迎,吴常信.阉割对公猪生长性能和胴体品质的影响[J].中国农业科学,2010,43(8):1688-1695. |
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| 作者姓名： | 蔡兆伟 赵晓枫 姚玉昌 张立凡 赵春江 徐宁迎 吴常信 |
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| 作者单位： | （浙江大学动物科学学院） |
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| 基金项目： | 国家重点基础研究发展规划项目，国家高技术发展计划项目 |
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| 摘 要： | 【目的】探讨阉割对生长期公猪的生长、胴体性状和肌肉品质的影响。【方法】选取36头全同胞雄性仔猪,根据配对原则分成18对,每对随机抽出1头在5周龄时阉割,另1头作对照。5、12、21和30周龄时空腹称重,采集血液测定血清睾酮含量;21、30周龄屠宰测定胴体性状,采集背最长肌样品,用近红外扫描和气相色谱-质谱分析方法测定肌内脂肪含量和脂肪酸组成。【结果】12、21和30周龄时,未去势公猪的血清睾酮含量极显著高于去势公猪(P0.01);21周龄时,去势公猪的体重高于未去势公猪(P0.05),但在30周龄时,未去势公猪体重极显著高于去势公猪(P0.01),21和30周龄时,去势公猪平均膘厚、板油重和脂肪率极显著高于未去势公猪,平均皮厚和瘦肉率极显著低于未去势公猪(P0.01);30周龄时,未去势公猪胴体重、前蹄重和眼肌面积显著地高于去势公猪(P0.05);21周龄时去势公猪肌内脂肪含量高于未去势公猪(P0.05),背最长肌肌肉部分饱和脂肪酸(SFA)和单不饱和脂肪酸(MUFA)极显著高于未去势公猪(P0.01)、但多不饱和脂肪酸(PUFA)极显著低于未去势公猪(P0.01),公猪血清睾酮含量和肌内脂肪含量之间无显著相关性(P0.05),但与C16:0、C18:1、MUFA及C18:0和PUFA存在极显著负相关和正相关(P0.01)。【结论】公猪阉割后,血清睾酮水平降低,从而影响公猪的生长和胴体性状以及肌肉脂肪酸组成。
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| 关 键 词： | 阉割" target="_blank">face="Verdana">阉割 生长 胴体性状 脂肪酸组成 |
| 收稿时间： | 2009-07-22; |
Effect of Gastration on the Growth Performance and Carcass Quality Traits of Male Pigs |
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CAI Zhao-wei,ZHAO Xiao-feng,YAO Yu-chang,ZHANG Li-fan,ZHAO Chun-jiang,XU Ning-ying,WU Chang-xin
.Effect of Gastration on the Growth Performance and Carcass Quality Traits of Male Pigs[J].Scientia Agricultura Sinica,2010,43(8):1688-1695. |
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| Authors: | CAI Zhao-wei ZHAO Xiao-feng YAO Yu-chang ZHANG Li-fan ZHAO Chun-jiang XU Ning-ying WU Chang-xin
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| Institution: | (College of Animal Science, Zhejiang University)
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| Abstract: | Objective] The present study was performed to investigate the effect of castration on the growth performance, carcass quality traits and muscle fatty acid composition of male pigs. Method] Eighteen pairs of male pigs were selected from six litters according to a matched-pairs design. Each pair was composed of two male full siblings with similar body weight, and one of the pigs from each pair was randomly selected to be castrated at 35 days old. The pigs were weighed at 5, 12, 21 and 30 weeks old and blood samples were collected for subsequent determination of hormones. Nine pairs of pigs were randomly selected to be slaughtered at 21 weeks of age, the other pairs were slaughtered at 30 weeks of age, and the carcass traits were determined then. Result] Boars had significant higher serum testosterone concentrations compared with barrows at 12, 21 and 30 weeks of age (P <0.01). The barrows grew faster than the boars before 21 weeks, but the barrows had a high significant growth difference at 30 weeks. The barrows had a significant higher average back fat thickness, leaf fat percentage and fat percentage, but lower average skin thickness and lean meat percentage than boars at both 21 and 30 weeks (P<0.01), significant higher carcass weight, foot weight and loin eye area were found in boars than barrows at 30 weeks (P<0.05). Compared to boars, higher intramuscular fat content (IMF) was found in barrows at 21 weeks. The content of several saturated fatty acids and total monounsaturated fatty acid (MUFA) were significantly higher (P<0.01), and total polyunsaturated fatty acid (PUFA)was significantly lower in the longissimus dorsi muscle of barrows than in boars. Serum testosterone concentrations was significantly negatively correlated with C16:0, C18:land MUFA, but positively correlated with C18:0 and PUFA. Conclusion] The growth performance and carcass quality traits of male pigs were significantly influenced by castration. |
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| Keywords: | castration growth carcass traits fatty acid composition |
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