Priming the cow for mobilization in the periparturient period: Effects of supplementing the dry cow with saturated fat or linseed
Priming the cow for mobilization in the periparturient period: Effects of supplementing the dry cow with saturated fat or linseed
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DOI：
10.3168/jds.2007-0437
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发表时间：
2008-03-01
影响因子：
3.5
通讯作者：
Larsen, T.
中科院分区：
文献类型：
--
作者：
Andersen, J. B.;Ridder, C.;Larsen, T.
高产奶牛在泌乳早期经历负能量平衡。干奶牛饲养管理将影响奶牛在随后的泌乳早期的生产性能和代谢状况。本研究评估了干奶牛饲养策略，以启动奶牛的脂质代谢，以克服以下早期泌乳的代谢挑战。在预期产犊前5周，将27头奶牛分配至3种等氮和等能饮食处理之一：低脂对照饮食（干对照）;高饱和脂肪饮食（干HSF）;和高亚麻籽饮食（干HUF）。产犊后，对奶牛饲喂相同的TMR泌乳饲料。通过血液和肝脏中的表现和代谢参数来评估治疗。饲喂干HSF和干HUF的奶牛血浆非酯化脂肪酸浓度显著高于干对照组，干HUF奶牛在发情期血浆中C18：3浓度最高。此外，饲喂干-HSF和干-HUF饲料的奶牛在第3周发情期肝脏中脂肪酸不完全β-氧化的能力最大。与饲喂干对照和干HUF的奶牛相比，在泌乳期饲喂干HSF的奶牛血浆胆固醇浓度最高。与饲喂干对照和干HUF的奶牛相比，饲喂干HSF的奶牛在泌乳早期的血浆非酯化脂肪酸和肝脏脂肪浓度最低。在文献和本实验中的数据表明，补充干奶牛与饱和脂肪酸来源是一个积极的策略，为启动奶牛体脂肪动员在以下早期泌乳。
High-producing dairy cows experience negative energy balance in early lactation. Dry-cow feeding management will affect the performance and metabolic status of dairy cows in the following early lactation. The present study evaluates dry-cow feeding strategies for priming lipid metabolism in the dairy cow to overcome the metabolic challenges in the following early lactation. Five weeks before expected calving, 27 cows were assigned to 1 of 3 isonitrogenous and isoenergetic dietary treatments: a low-fat control diet (dry-control); a high saturated fat diet (dry-HSF); and a high linseed diet (dry-HUF). The cows were fed the same TMR lactation diet after calving. The treatments were evaluated by performance and metabolic parameters in blood and liver. The cows fed dry-HSF and dry-HUF had significantly greater plasma nonesterified fatty acid concentrations compared with dry-control, and the dry-HUF cows had the greatest C18:3 concentrations in plasma in the prepartum period. Further, the cows fed dry-HSF and dry-HUF diets had a tendency for the greatest capacity for incomplete beta-oxidation of fatty acids in the liver in wk 3 prepartum. The plasma cholesterol concentration was greatest for cows fed dry-HSF in the prepartum period compared with those fed dry-control and dry-HUF. The cows fed dry-HSF had the lowest plasma nonesterified fatty acid and liver fat concentrations in early lactation compared with the cows fed dry-control and dry-HUF. Data in the literature and the present experiment indicate that supplementing dry cows with a saturated fatty acid source is a positive strategy for priming dairy cows for body fat mobilization in the following early lactation.