日粮添加植物油籽对乳脂脂肪酸的影响.doc

日粮添加植物油籽对乳脂脂肪酸的影响
刘仕军1,王加启1,卜登攀1,魏宏阳1,周凌云1,雒秋江2
(1中国农业科学院北京畜牧兽医研究所/国家动物营养重点实验室,北京 100094; 2新疆农业大学,乌鲁木齐 830052)
摘要: 【目的】研究日粮中添加国内广泛种植的几种植物油籽对中国荷斯坦奶牛乳脂脂肪酸组成影响,为改变牛奶脂肪酸组成,提高乳品质寻找合适的途径。【方法】选用40头泌乳中期(150±25d)、胎次(3±1胎)的中国荷斯坦奶牛,采用完全随机试验(对照组、全脂整粒大豆组、混合油籽组以及全脂膨化大豆组)设计。试验期6周,牛奶样品于试验第4、5和6周采集,利用气相色谱仪分析样品脂肪酸组成。【结果】与对照组相比,日粮添加膨化大豆后乳脂中共轭亚油酸(CLA)%(P<)。全脂整粒大豆组、混合油籽组以及全脂膨化大豆组乳脂中月桂酸(C12﹕0)和豆蔻酸(C14﹕0)%%、%%、%%。【结论】日粮添加植物油籽可以改变乳脂脂肪酸组成,增加CLA含量,降低月桂酸(C12﹕0)和豆蔻酸(C14﹕0)含量,从而提高乳品质。
关键词: 奶牛; 植物油籽; 共轭亚油酸(CLA); 牛乳脂脂肪酸
The Effect of Supplementation with Vegetable Oilseed on Fatty Acid Profiles in Milk Fat from Dairy Cows
LIU Shi-jun1, WANG Jia-qi1, BU Deng-pan1, WEI Hong-yang1, ZHOU Ling-yun1, LUO Qiu-jiang2
(1 The State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100094 ; 2 The Agricultural University of Xinjiang, Urumqi 830052)
Abstract: 【Objective】 Forty Holstein dairy cows were used to determine the effects of dietary supplementation with vegetable oilseeds position of bovine milk fatty acids. 【Method】 Experimental design used pletely randomized design. At the start of the experiment cows were 150±25 DIM. Total duration of the experiment was six weeks. Measurements were made during the last three weeks. Cows in four treatments were fed a basal diet (CT) or basal diet