摘要
实验表明,在配合饲料和杂交狼尾草比例为1:1(干物质比例)条件下养殖的草鱼与全配合饲料养殖的草鱼在背肌脂肪酸组成的对比中,饲草鱼多不饱和脂肪酸(PUFA)的相对含量为(40.18±1.36)%,是饲料鱼(21.64±0.98)%的1.86倍。饲草鱼n–3PUFA的相对含量为(14.72±1.27)%,是饲料鱼(2.43±0.49)%的6.06倍。其中,最明显的是饲草鱼18:3n-3的相对含量(10.27±1.21)%是饲料鱼(1.01±0.02)%的10.17倍。实验也对比了杂交狼尾草叶片与饲料脂肪酸组成的差异。发现在杂交狼尾草(叶片)的脂肪酸组成中18:3n-3的含量高达(66.23±0.16)%。而在饲料中18:3n-3的含量仅为(4.34±0.03)%。杂交狼尾草和饲料中未检测到EPA和DHA。草鱼利用杂交狼尾草中丰富的18:3n-3生物转化生成了EPA和DHA,从而显著提高了饲草鱼鱼肉中n–3PUFA的含量,促进草鱼生长发育、提高抗病能力,改善鱼肉品质。
Experiment showed that,when comparing the fatty acid components in back muscle of grass carps between feeding full compound feed and feeding the feed at 1：1 ratio of compound feed and Pennisetum americanum×P. purpureum CV. 23A×N51,the relative content of PUFA in the fish fed grass was （40.18±1.36）% and was 1.86 times of the fish fed full compound feed（21.64±0.98）%. The relative content of n-3 PUFA in the fish fed grass was （14.72±1.27）% and was 6.06 times of the fish fed full compound feed（2.43±0.49）%.Especially,The relative content of 18：3n-3 in the fish fed grass was （10.27±1.21）% and was 10.17 times of the fish fed full compound feed（1.01±0.02）%.The fatty acid components in the leaves of Pennisetum americanum×P. purpureum CV. 23A×N51 and compound feed were also compared. It was found that,the content of 18：3n-3 in the leaves of Pennisetum americanum×P. purpureum CV. 23A×N51 was as high as （66.23±0.16）% and that in compound feed was only 4.34±0.03%. None of EPA and DHA were detected in both Pennisetum americanum×P. purpureum CV. 23A×N51 and compound feed. Grass carps converted the abundant 18：3n-3 in grass to EPA or DHA and thus increased the relative content of n-3PUFA in the fish fed grass,Feeding grass increased the fish growth and development,enhanced its disease-resistance and improved fish muscle quality.
出处
《中国农学通报》
CSCD
2008年第6期487-490,共4页
Chinese Agricultural Science Bulletin
基金
福建省省财政专项"福建省农业科学院科技创新团队建设基金"(STIF-Y01)
国家重点基础研究发展计划(973计划)项目"中国西部牧草
乡土草遗传及选育的基础研究"(2007CB108903)
关键词
脂肪酸组成
亚麻酸
杂交狼尾草
草鱼
the fatty acid components,linolenic acid,Pennisetum americanum×P. purpureum CV. 23A×N51,grass carp
