Altered concentrate to forage ratio in cows ration enhanced bioproduction of specific size subpopulation of milk fat globules.
Altered concentrate to forage ratio in cows ration enhanced bioproduction of specific size subpopulation of milk fat globules.
复制标题
改变奶牛日粮中精料与草料的比例可增强特定大小乳脂球亚群的生物生产。
DOI：
10.1016/j.foodchem.2015.01.138
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发表时间：
2015
期刊：
影响因子：
8.8
通讯作者：
N. Argov
中科院分区：
文献类型：
--
作者：
Ronit Mesilati;U. Moallem;Yogev Magen;N. Argov
研究了奶牛日粮精粗比变化时乳脂球平均直径变化的机理。奶牛饲喂高浓缩低粗饲料（HCLF）或高粗饲料低浓缩（LCHF）日粮4周。在生全脂奶中测定的MFG平均直径，LCHF喂养组比HCLF喂养组大0.4 μm。处理之间的主要成分差异发现于直径为3.3 μm的特定MFG亚组（F1），HCLF与LCHF牛奶中的癸酸、月桂酸、肉豆蔻酸浓度较高，油酸浓度较低。同样，仅在F1中发现治疗之间的脂质浓度差异，LCHF与HCLF乳汁相比，甘油三酯和磷脂酰乙醇胺较高，鞘磷脂浓度较低。因此，LCHF全生乳中较高的MFG平均直径可能归因于F1组MFG分泌增加，而其他MFG大小组中的脂肪含量和组成保持不变。
The mechanism underlying the shift in milk-fat-globule (MFG) mean diameter upon changing the concentrate-to-forage ratio in dairy cow rations was investigated. Cows were fed high-concentrate low-forage (HCLF) or high-forage low-concentrate (LCHF) rations for 4 weeks. Mean diameter of MFG, determined in raw whole milk, was 0.4 μm larger in the LCHF-fed vs. HCLF-fed group. The main compositional differences between treatments were found in a specific MFG subgroup with the diameter of 3.3 μm (F1), with higher capric, lauric, myristic and lower oleic acid concentrations in HCLF vs. LCHF milk. Similarly, lipid concentration differences between treatments were only found in F1, with higher triglyceride and phosphatidylethanolamine, and lower sphingomyelin concentrations in LCHF vs. HCLF milk. The higher MFG mean diameter in whole raw LCHF milk might therefore be attributed to increased secretion of F1-group MFG, while fat content and composition in the other MFG size groups remains unchanged.
影响因子：
6.1
作者：
Argov-Argaman N;Smilowitz JT;Bricarello DA;Barboza M;Lerno L;Froehlich JW;Lee H;Zivkovic AM;Lemay DG;Freeman S;Lebrilla CB;Parikh AN;German JB
通讯作者：
German JB