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Effects of Lonicera japonica Extract with Different Contents of Chlorogenic Acid on Lactation Performance, Serum Parameters, and Rumen Fermentation in Heat-Stressed Holstein High-Yielding Dairy Cows

文献类型： 外文期刊

作者： Ma, Fengtao 1 ; Liu, Junhao 1 ; Li, Shengli 2 ; Sun, Peng 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Anim Sci, State Key Lab Anim Nutr & Feeding, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Anim Sci & Technol, Beijing Engn Technol Res Ctr Raw Milk Qual & Safet, State Key Lab Anim Nutr & Feeding, Beijing 100193, Peoples R China

关键词： Lonicera japonica extract; chlorogenic acid; heat stress; antioxidant status; immune function; rumen fermentation parameters; dairy cow

期刊名称：ANIMALS （ 影响因子：3.0； 五年影响因子：3.2 ）

ISSN： 2076-2615

年卷期： 2024 年 14 卷 8 期

页码：

收录情况： SCI

摘要： The susceptibility of high-yielding dairy cows to heat stress results in significant economic losses for the dairy farming industry. In this study, we evaluated the effects of Lonicera japonica extract (LJE) with different chlorogenic acid (CGA) contents on lactation performance, serum biochemical and antioxidant indicators, immune factors, and rumen fermentation parameters in heat-stressed high-yielding dairy cows. After feeding dairy cows for 56 days, we found that the addition of LJE promoted lactation performance and rumen fermentation in high-yielding cows experiencing heat stress. It also increased the levels of IgG and the activities of glutathione peroxidase, superoxide dismutase, and total antioxidant capacity, while reducing the concentrations of creatinine, malondialdehyde and inflammatory factors in the serum. Furthermore, while maintaining a consistent level of CGA content, the effects of addition from both types of LJE are similar. These findings demonstrate that LJE exhibits remarkable efficacy in alleviating heat stress and enhancing the lactation performance of dairy cows during hot summers, with CGA serving as the effective ingredient responsible for its anti-heat stress properties. This examined the effects of Lonicera japonica extract (LJE) with different chlorogenic acid (CGA) contents on lactation performance, antioxidant status and immune function and rumen fermentation in heat-stressed high-yielding dairy cows. In total, 45 healthy Chinese Holstein high-yielding dairy cows, all with similar milk yield, parity, and days in milk were randomly allocated to 3 groups: (1) the control group (CON) without LJE; (2) the LJE-10% CGA group, receiving 35 g/(dhead) of LJE-10% CGA, and (3) the LJE-20% CGA group, receiving 17.5 g/(dhead) of LJE-20% CGA. The results showed that the addition of LJE significantly reduced RT, and enhanced DMI, milk yield, milk composition, and improved rumen fermentation in high-yielding dairy cows experiencing heat stress. Through the analysis of the serum biochemical, antioxidant, and immune indicators, we observed a reduction in CREA levels and increased antioxidant and immune function. In this study, while maintaining consistent CGA content, the effects of addition from both types of LJE are similar. In conclusion, the addition of LJE at a level of 4.1 g CGA/(dhead) effectively relieved heat stress and improved the lactation performance of dairy cows, with CGA serving as the effective ingredient responsible for its anti-heat stress properties.

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