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Effects of calcium propionate supplementation on lactation performance, energy balance and blood metabolites in early lactation dairy cows

文献类型： 外文期刊

作者： Liu, Q. 1 ; Wang, C. 1 ; Yang, W. Z. 1 ; Guo, G. 1 ; Yang, X. M. 2 ; He, D. C. 2 ; Dong, K. H. 1 ; Huang, Y. X. 1 ;

作者机构： 1.Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Shanxi, Peoples R China

2.Shanxi Acad Agr Sci, Inst Anim Sci, Taiyuan, Shanxi, Peoples R China

3.Agr & Agri Food Canada, Res Ctr, Lethbridge, AB, Canada

关键词： calcium propionate;lactation performance energy balance;metabolites;early lactation;dairy cows

期刊名称：JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION （ 影响因子：2.13； 五年影响因子：2.322 ）

ISSN： 0931-2439

年卷期： 2010 年 94 卷 5 期

页码：

收录情况： SCI

摘要： P>To evaluate the effects of calcium propionate (CaP) supplementation on feed intake, milk yield and milk composition, energy balance, blood metabolites and urine ketones in early lactation Holstein dairy cows from 1 to 63 days in milk (DIM), 32 multiparous Holstein dairy cows, blocked by lactation number, previous 305-day milk production, and expected calving date, were arranged into four groups in a randomized block design. Treatments were control, LCaP, MCaP and HCaP with 0, 100, 200 and 300 g calcium propionate per cow per day respectively. The supplement of food grade CaP (99.8% of CaP) was hand-mixed into the top one-third of the daily ration. Cows were fed ad libitum a total mixed ration consisting of equal proportion of forage and concentrate. Feed intake, milk yield and components were not affected by CaP supplementation. The energy balance, expressed as the difference between energy input and output, tended to be higher (p = 0.08) for CaP-supplemented cows during the 63-DIM period, especially during the first 21-DIM lactation. Calcium propionate-supplemented cows showed a trend (p = 0.09) towards less loss of body weight (BW) during the 63-DIM period. Concentrations of glucose in plasma and insulin in serum were higher for cows fed CaP relative to control and linearly (p < 0.01) increased with increasing CaP supplementation. Concentrations of non-esterified fatty acids (NEFA), beta-hydroxybutyrate (BHBA) and urine ketones were lower for CaP-supplemented cows at 7, 14 and 21 DIM of lactation and linearly (p < 0.01) decreased with increasing CaP supplementation. These results indicated that nutrient digestibilities and energy status may have been improved.

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