China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (12): 4646-4653.doi: 10.16431/j.cnki.1671-7236.2022.12.014

• Nutrition and Feed • Previous Articles     Next Articles

Effects of Rumen-protected Choline and Organo-chromium on Immunity and Antioxidant Properties of Perinatal Dairy Cows

LI Xiangbao1, XU Xiaohui3, AN Xiuxiu2, WEI Xueliang1, XU Yuwei1, WANG Yuanyuan1, CHEN Shi3   

  1. 1. College of Veterinary Medicine, Southwest University, Chongqing 400715, China;
    2. Jiangsu Jicui Yaokang Biology Co., Ltd., Nanjing 210031, China;
    3. Taiji Technology Development Co., Ltd., Chongqing 401353, China
  • Received:2022-04-19 Online:2022-12-05 Published:2022-12-01

Abstract: 【Objective】 The aim of this study was to investigate the effects of rumen-protected choline and organic-chromium on immunity and antioxidant properties of perinatal dairy cows, and provide scientific guidance and theoretical basis for the application of rumen-protected choline and organo-chromium in perinatal dairy cow diets.【Method】 Forty healthy Chinese Holstein cows (average parity was 1 to 2) were randomly divided into 4 groups with 10 cows per group.Cows in control group were fed the basal diet, cows in the choline group were fed the basal diet +30 g/d rumen-protect choline, cows in the organic chromium group were fed the basal diet +8 g/d chromium methionine, and cows in the mixed group were fed basal diet + 30 g/d rumen-protect choline +8 g/d chromium methionine.The experiment lasted from day 20 before delivery to day 20 after delivery.The average daily milk production was recorded within 4 weeks postpartum.The blood samples were collected at 20 and 10 days before parturition, delivery day, 10 and 20 days after parturition, respectively, before morning meal.The contents of serum antioxidant(GSH-Px, CAT and SOD) and immunity properties indexs (IL-1, IL-6 and TNF-α) were dectected.【Result】 Compared with the control group, the average daily milk yield of choline, organic-chromium and mixed groups were significantly increased within 4 weeks postpartm (P<0.05).There was no significant difference in the serum GSH-Px and CAT contents of the dairy cows among groups prepartum(P>0.05), but the serum SOD contents in three experimental groups were significantly decreased (P<0.05).On the day of delivery, day 10 after delivery, the contents of serum GSH-Px, CAT and SOD in choline and organic-chromium groups were significantly higher than those in control group (P<0.05).On the day 20 after delivery, serum GSH-Px and CAT contents in choline group were significantly lower than those in control, organic chromium and mixed groups (P<0.05), while serum SOD contents were significantly decreased (P<0.05).In the whole trail period, the content of serum IL-1 was significant lower than that in control, choline and organic-chromium groups, but the contents of serum IL-6 and TNF-α were significantly increased (P<0.05).【Conclusion】 Supplement of 30 g/d remen-protect choline or 8 g/d organic chromium could significantly decrease the oxidative stress level, increase milk yield and immunity, and improve the heath status of dairy cows. There was no signicant difference between the effect of combined supplement and single supplement.

Key words: rumen-protected choline; organic-chromium; perinatal dairy cows; immunity; antioxidant properties

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