Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700 AE Wageningen, The Netherlands; Food Quality and Design Group, Wageningen University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Wageningen Food Safety Research, Wageningen University and Research, P.O. Box 230, 6700 AE Wageningen, The Netherlands.
Food Chem. 2020 Jun 1;314:126153. doi: 10.1016/j.foodchem.2019.126153. Epub 2020 Jan 7.
The relationships between the fatty acid (FA) composition in forage and milk (F&M) from different dairy systems were investigated. Eighty milk samples and 91 forage samples were collected from 40 farms (19 organic, 11 pasture and 10 conventional) in the Netherlands, during winter and summer. The FA profiles of F&M samples were measured with gas chromatography. The results showed that the F&M of organic farms were significantly differentiated from the F&M of other farms, both in summer and winter. The differences are likely due to the different grazing strategies in summer and different forage composition in winter. The Pearson's correlation results showed the specific relationship between individual FAs in forages and related milk. A PLS-DA model was applied to classify all milks samples, resulting in 87.5% and 83.3% correct classifications of training set and validation set.
研究了不同奶牛养殖系统中饲料（F）和牛奶（M）中的脂肪酸（FA）组成之间的关系。在荷兰，从 40 个农场（19 个有机、11 个放牧和 10 个常规）中采集了 80 份牛奶样本和 91 份饲料样本，分别在冬季和夏季进行采集。采用气相色谱法对 F&M 样本的 FA 图谱进行了检测。结果表明，无论是在夏季还是冬季，有机农场的 F&M 与其他农场的 F&M 都有显著的差异。这种差异可能是由于夏季放牧策略不同和冬季饲料成分不同所致。皮尔逊相关分析结果表明，饲料中各 FAs 与相关牛奶之间存在特定的关系。应用 PLS-DA 模型对所有牛奶样本进行分类，训练集和验证集的正确分类率分别达到 87.5%和 83.3%。
