日粮中添加富硒桑叶粉对陕南白山羊屠宰性状和肌肉脂肪酸的影响

doi:10.12160/j.issn.1672-5190.2023.01.008

畜牧与饲料科学 ›› 2023, Vol. 44 ›› Issue (1): 54-59.doi: 10.12160/j.issn.1672-5190.2023.01.008

日粮中添加富硒桑叶粉对陕南白山羊屠宰性状和肌肉脂肪酸的影响

陈玲¹,杨竞贤¹,成温玉¹,宋渊博¹,王月曦¹,贺志芹¹,周月亭¹,楚渠²,彭云武²,陈正余³,刘强²

1.安康学院现代农业与生物科技学院，陕西安康 725000
2.安康学院/陕西省蚕桑重点实验室，陕西安康 725000
3.陕西省安康市蚕桑技术推广中心，陕西安康 725000

收稿日期:2022-09-30 出版日期:2023-01-30 发布日期:2023-02-14
通讯作者: 刘强（1962—），男，教授，硕士，主要从事畜牧教学研究工作。
作者简介:陈玲（1988—），女，讲师，博士，主要从事家畜种质资源调查工作。
基金资助:
中国富硒产业研究院专项项目(2021FXZX05-03);陕西省科技计划项目(2023-JC-QN-0237);陕西省专项资金项目(陕农计财〔2022〕29号);大学生创新创业训练计划项目(S202111397062);大学生创新创业训练计划项目(S202111397066);大学生创新创业训练计划项目(S202211397046);大学生创新创业训练计划项目(S202211397065)

Effects of Dietary Supplementation of Selenium-rich Mulberry Leaf Powder on Slaughtering Traits and Muscular Fatty Acids in Shannan White Goats

CHEN Ling¹,YANG Jing-xian¹,CHENG Wen-yu¹,SONG Yuan-bo¹,WANG Yue-xi¹,HE Zhi-qin¹,ZHOU Yue-ting¹,CHU Qu²,PENG Yun-wu²,CHEN Zheng-yu³,LIU Qiang²

1. School of Modern Agriculture and Biotechnology，Ankang University，Ankang 725000，China
2. Ankang University/Shaanxi Provincial Key Laboratory of Sericulture，Ankang 725000，China
3. Sericulture Technology Promotion Center of Ankang City of Shaanxi Province，Ankang 725000，China

Received:2022-09-30 Online:2023-01-30 Published:2023-02-14

摘要/Abstract

摘要：

[目的] 研究日粮中添加富硒蛋白桑叶粉对陕南白山羊屠宰性状指标、肌肉理化特性指标及肌肉脂肪酸和硒含量的影响。[方法] 将30只3月龄陕南白山羊羯羊随机分为对照组和富硒桑叶组，每组15只；对照组饲喂基础日粮，富硒桑叶组在基础日粮中添加15%的富硒蛋白桑叶粉；试验期为60 d，预饲期15 d，正饲期45 d；试验结束时进行屠宰试验，测定屠宰性状及肌肉理化特性指标；采集试验羊背最长肌，测定肌肉脂肪酸含量和硒含量。[结果] 日粮中添加15%的富硒蛋白桑叶粉可显著（P<0.05）提高陕南白山羊肌肉pH_{1 h}值和失水率；富硒桑叶组的眼肌面积和胴体重大于对照组，但差异不显著（P>0.05）。在2组山羊的背最长肌中检测到19种脂肪酸，其中饱和脂肪酸5种，不饱和脂肪酸14种；2组山羊肌肉中饱和脂肪酸、单不饱和脂肪酸及多不饱和脂肪酸含量占脂肪酸总含量的比例相似，分别约为28%、67%、5%；富硒桑叶组肌肉中的γ-亚麻酸含量显著（P<0.05）高于对照组，但脂肪酸总含量低于对照组。与对照组相比，富硒桑叶组肌肉中硒含量有所升高，但差异不显著（P>0.05）；富硒桑叶组（0.071 3 mg/kg）和对照组（0.066 0 mg/kg）背最长肌硒含量均达到陕西省含硒肉类食品标准。[结论] 在陕南白山羊日粮中添加15%桑叶粉可在一定程度上改善产肉量、促进硒在肌肉中的富集、减少胴体脂肪沉积，但由于肌肉失水率显著升高，需在储存和运输过程中尽量避免水分丢失。

关键词: 蛋白桑, 陕南白山羊, 屠宰性状, 肌肉脂肪酸, 硒

Abstract:

[Objective] This study aimed to investigate the effects of dietary supplementation of selenium-rich mulberry leaf powder on slaughtering traits, physicochemical properties of muscle as well as contents of muscular fatty acids and selenium in Shannan white goats. [Method] A total of 30 gelded Shannan white goats aged 3 months were randomly assigned into a control group （n=15） or an experimental group （n=15）. The control group fed a basal diet, and the experimental group fed the same basal diet supplemented with 15% selenium-rich mulberry leaf powder. The experimental period was 60 days, including a 15-day pre-feeding experiment and a 45-day formal feeding experiment. At the end of the experiment, a slaughtering experiment was conducted to determine the indicators associated with slaughtering traits and physicochemical properties of muscle. In addition, the longissimus dorsi muscle of the goats were sampled, and the contents of fatty acids and selenium were evaluated. [Result] Dietary supplementation of selenium-rich mulberry leaf powder significantly （P<0.05） increased the muscular pH_{1 h} value and water loss rate. The experimental group had higher loin eye area and carcass weight in comparison to the control group, while no significant （P>0.05） differences were observed. A total of 19 fatty acids were determined in the longissimus dorsi muscle of the goats in both groups, including 5 saturated fatty acid （SFA） and 14 unsaturated fatty acid （NSFA）. The both groups had similar proportions of muscular SFA, monounsaturated fatty acid （MUFA） and polyunsaturated fatty acid （PUFA） contents accounting for the total contents of fatty acids, which were approximately 28%, 67% and 5%, respectively. Compared with the control group, the content of muscular gamma-linolenic acid in the experimental group was significantly （P<0.05) higher, while the total contents of muscular fatty acids were significantly （P<0.05） lower. The experimental group had higher （P>0.05） content of muscular selenium than the control group. The content of muscular selenium in both of the experimental group （0.071 3 mg/kg） and the control group （0.066 0 mg/kg） reached the Shaanxi provincial food standard for selenium-containing meat. [Conclusion] Dietary supplementation of 15% selenium-rich mulberry leaf powder improves meat production, promotes selenium enrichment in muscle, and reduces carcass fat deposition in Shannan white goats to a certain extent. Due to the significantly increased muscular water loss rate, water losing should be avoided as much as possible during the goat meat storage and transportation.

Key words: mulberry, Shannan white goats, slaughtering traits, muscular fatty acids, selenium

中图分类号:

S827.5

陈玲, 杨竞贤, 成温玉, 宋渊博, 王月曦, 贺志芹, 周月亭, 楚渠, 彭云武, 陈正余, 刘强. 日粮中添加富硒桑叶粉对陕南白山羊屠宰性状和肌肉脂肪酸的影响[J]. 畜牧与饲料科学, 2023, 44(1): 54-59.

CHEN Ling, YANG Jing-xian, CHENG Wen-yu, SONG Yuan-bo, WANG Yue-xi, HE Zhi-qin, ZHOU Yue-ting, CHU Qu, PENG Yun-wu, CHEN Zheng-yu, LIU Qiang. Effects of Dietary Supplementation of Selenium-rich Mulberry Leaf Powder on Slaughtering Traits and Muscular Fatty Acids in Shannan White Goats[J]. Animal Husbandry and Feed Science, 2023, 44(1): 54-59.

图/表 4

参考文献 29

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日粮中添加富硒桑叶粉对陕南白山羊屠宰性状和肌肉脂肪酸的影响

Effects of Dietary Supplementation of Selenium-rich Mulberry Leaf Powder on Slaughtering Traits and Muscular Fatty Acids in Shannan White Goats

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