宁夏荒漠化草场代表性牧草的脂肪酸组成及含量  

Fatty acids composition and contents in typical herbages from desert grassland of Ningxia region

作　　者：冯帆 李昊 杨洁[1,2,3] 王京 高巧仙[1,2,3] 张建勇 辛国省[1,2,3] FENG Fan;LI Hao;YANG Jie;WANG Jing;GAO Qiaoxian;ZHANG Jianyong;XIN Guosheng(School of Life Science,Ningxia University;Ningxia Feed Engineering Technology Research Center;Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China;Ningxia Haobiao Analysis and Testing Service Institute;Ningxia Animal Husbandry Workstation,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏大学生命科学学院 [2]宁夏饲料工程技术研究中心 [3]西部特色生物资源保护与利用教育部重点实验室 [4]宁夏昊标检测服务研究院 [5]宁夏畜牧工作站,宁夏银川750021

出　　处：《福建农林大学学报（自然科学版）》2021年第1期108-114,共7页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：宁夏一二三产业融合发展科技创新示范项目(YES-16-10-1002);宁夏重点研发计划项目(2019BBF02016、2019BBF02001)。

摘　　要：根据宁夏盐池县草地植被类型和滩羊采食习性,采集该地区20种代表性牧草,利用气相色谱仪测定其脂肪酸含量.宁夏荒漠化草场代表性牧草总脂肪酸含量为8.61~31.32 g·kg^(-1),以棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸为主,占总脂肪酸含量的51.44%~89.09%;饱和脂肪酸总量为3.25~8.96 g·kg^(-1),不饱和脂肪酸总量为4.06~23.34 g·kg^(-1).影响羊肉风味的脂肪酸主要有亚麻酸、油酸和硬脂酸.白刺花、拐轴鸦葱和马齿苋中亚麻酸含量较高,均大于10 g·kg^(-1),而苦豆子、藜、草木樨状黄耆中的亚麻酸含量较低,均低于0.1 g·kg^(-1);柠条锦鸡儿和马齿苋中油酸含量相对较高,分别为3.97和2.48 g·kg^(-1),其他多数牧草中油酸含量均低于1 g·kg^(-1);白刺花、披针叶野决明、苦豆子和马齿苋中硬脂酸含量相对较高,均大于1 g·kg^(-1).Twenty typical forage species were collected from Yanchi County,Ningxia according to grassland vegetation types and selective grazing behavior of sheep,and the fatty acids contents were determined by gas chromatography.The total fatty acid contents of 20 species of forages ranged from 8.61 to 31.32 g·kg^(-1),which were mainly composed of palmitic acid(C16∶0),stearic acid(C18∶0),oleic acid(C18∶1 n9 c),linoleic acid(C18∶2 n6 c)and linolenic acid(C18∶3 n3),accounting for 51.44%-89.09%of total fatty acids.Total saturated fatty acids contents ranged from 3.25 to 8.96 g·kg^(-1),and unsaturated fatty acids contents varied from 4.06 to 23.34 g·kg^(-1).The types of fatty acids that affect mutton flavor were linolenic acid,oleic acid and stearic acid.The content of linolenic acid exceeded 10 g·kg^(-1)in Sophora davidii,Scorzonera divaricata and Portulaca oleracea,while the contents in Sophora alopecuroides,Chenopodium album and Astragalus melilotoides were lower than 0.1 g·kg^(-1).The content of oleic acid in Caragana korshinskii and P.oleracea was relatively high at 3.97 and 2.48 g·kg^(-1),respectively,while its content was under 1 g·kg^(-1)in other herbages studied.Stearic acid was relatively abundant in S.davidii,Thermopsis lanceolata,S.alopecuroides and P.oleracea,reaching 1 g·kg^(-1).

关 键 词：牧草 脂肪酸 滩羊 营养 风味 

分 类 号：S816.15[农业科学—饲料科学]