Effects of Grazing with Supplementary Concentrate on Body Weight, Serum Biochemical Indices and Mineral Contents of Sunit Ewes during Post-Pregnancy and Pre-Lactation Periods

  • ZHAO Yanli ,
  • GUO Xiaoyu ,
  • LI Yinghao ,
  • YUE Yuanxi ,
  • LIU Shulin ,
  • QI Jingyu ,
  • SHI Binlin ,
  • LI Jun ,
  • YAN Sumei
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  • 1. Inner Mongolia Key Laboratory of Animal Nutrition and Feed Science, College of Animal Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Sunite Right Banner Rongyu Modern Ecological Livestock Co., Ltd., Qiharigetu 011200, China

Received date: 2020-10-29

  Online published: 2021-05-14

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Abstract

The objectives of this study were to investigate the effects of grazing with supplementary concentrate on body weight, serum biochemical indices and mineral contents of Sunit ewes, and the birth weight of lambs. The single factor randomized trial design was used in this study. Sixty-six healthy Sunit ewes with similar weight and parity were divided into two groups and each group had 33 ewes. At pre-partum, the pregnant ewes in the control group were supplied with the corn and green hay, but the corn in the control group was equally replaced of the concentrate in the trial group. At post-partum, the lactating ewes in the control group were supplied with the mixture of corn, soybean meal and green hay, but the mixture of corn and soybean in the control group was equally replaced of the concentrate in the trial group. The experimental period was totally 120 d and included post-pregnancy period and pre-lactation period. The results showed that the final body weight of ewes and the birth weight of lambs in the trial group had higher trend compared with the control group (0.05≤P≤0.10), the lambs’ body weight at 2 months of age was significantly higher than that in the control group (P<0.05), and the body weight loss at 2 months postpartum of ewes was significantly lower than that in the control group (P<0.05). In the post-pregnancy period, the serum alkaline phosphatase (ALP) activity of ewes in the trial group tented to greater than that in the control group (0.05≤P≤0.10). The serum phosphorus (P), copper (Cu), manganese (Mn), zinc (Zn) and selenium (Se) contents of ewes in the trial group were significantly higher than those in the control group (P<0.05). In the pre-lactation period, the serum ALP activity, and the contents of urea nitrogen (UN), calcium (Ca), P, magnesium (Mg), potassium (K), Cu, Zn and chromium (Cr) of ewes in the trial group were significantly higher than those in the control group (P<0.05). The serum iron (Fe), cobalt (Co) and Se contents of ewes in the trial group tended to greater than those in the control group (0.05≤P≤0.10). In conclusion, grazing with supplementary the equal replacement of corn or corn and soybean mixture with concentrate can promote the recovery of postpartum body weight of ewes and the growth of lambs, and increase the serum P, Mg, Cu, Zn and Se contents of ewes during post-pregnancy and pre-lactation period, as well as the serum Ca, K, Fe, Co and Cr contents of ewes during pre-lactation period.

Cite this article

ZHAO Yanli , GUO Xiaoyu , LI Yinghao , YUE Yuanxi , LIU Shulin , QI Jingyu , SHI Binlin , LI Jun , YAN Sumei . Effects of Grazing with Supplementary Concentrate on Body Weight, Serum Biochemical Indices and Mineral Contents of Sunit Ewes during Post-Pregnancy and Pre-Lactation Periods[J]. Chinese Journal of Animal Nutrition, 2021 , 33(5) : 2707 -2716 . DOI: 10.3969/j.issn.1006-267x.2021.05.030

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