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Fermented Chinese herbal preparation: Impacts on milk production, nutrient digestibility, blood biochemistry, and antioxidant capacity of late-lactation cows under heat stress

文献类型： 外文期刊

作者： Zhao, Shoupei 1 ; Shan, Chunhua 1 ; Wu, Zhanjun 3 ; Feng, Man 4 ; Song, Lianjie 4 ; Wang, Yanan 4 ; Gao, Yuhong 1 ; Guo, Jianjun 4 ; Sun, Xinsheng 5 ;

作者机构： 1.Hebei Agr Univ, Coll Anim Sci & Technol, Baoding 071001, Peoples R China

2.China Agr Univ, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Grain & Oil Crops, Shijiazhuang 050035, Peoples R China

4.Chengde Acad Agr & Forestry Sci, Chengde 067060, Peoples R China

5.Hebei Agr Univ, Coll Informat Sci & Technol, Baoding 071001, Peoples R China

关键词： Antioxidant capacity; Blood biochemistry; Chinese herb preparation; Heat stress; Milking performance

期刊名称：ANIMAL FEED SCIENCE AND TECHNOLOGY （ 影响因子：3.313； 五年影响因子：3.914 ）

ISSN： 0377-8401

年卷期： 2022 年 292 卷

页码：

收录情况： SCI

摘要： The objective of this study was to investigate the effects of dietary supplementation of fermented Chinese herbal preparation (CHP) on the milking performance, nutrient digestibility, blood biochemistry, and antioxidant capacity in cows under heat stress (HS). A total of 40 late-lactation Holstein cows (Average body weight: 560 +/- 51.0 kg, milk per day: 16 +/- 3.0 kg) were randomly assigned to 4 groups (10 cows per group). The cows in treatment groups were supplied with 25, 50, or 100 g CHP in diet per cow per day, and the control group was no supplied with CHP. All cows were raised at a natural HS environment (Average THI: 74.5) during 42-d experimental period. Milk, fecal samples, and blood samples were collected on 14, 28, and 42 d for measuring milk production, nutrient apparent digestibility, and serum biochemical parameters, heat shock protein involving HSP70, HSP90, and HSF. The antioxidant enzymes (T-AOC, SOD, CAT, GPx, and PRDX2) activities in blood and its genes expression level were also measured on 14, 28, and 42 d of experiment. The results showed that the dietary supplementation of CHP demonstrated an increased tendency in DMI (P = 0.08), and 50 or 100 g/d CHP increased milk yield, milk composition (fat and protein) content (all P < 0.05) for the entire 42-d period, compared with the control group. However, there was no difference (P > 0.05) on nutrient digestibility among all groups. From blood biochemistry, the HSP90 or HSP70 level in serum exhibited a decrease (P < 0.05) with CHP supplements. Also, the serum triiodothyronine and glucose content were increased (P <= 0.02) by CHP, while the prolactin content demonstrated an increasing trend (P = 0.08). For antioxidant capacity, the doses of CHP increased serum T-AOC (P < 0.05), SOD (P =

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