Studies on Antioxidant Capacity in Selenium-Deprived the Choko Yak in the Shouqu Prairie
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Studies on Antioxidant Capacity in Selenium-Deprived the Choko Yak in the Shouqu Prairie Kui Zhao 1 & Bin Huo 2 & Xiaoyun Shen 2,3,4 Received: 7 October 2020 / Accepted: 22 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The fencing device on pasture has seriously restricted the foraging range in grazing animals. As a result, the incidence of selenium (Se) deficiency is rising in grazing Choko yaks in the Shouqu prairie in Northwest China. To study the effect of Se deprivation on antioxidant capacity in the Choko yaks, the mineral contents in soil, forage, blood, and liver have been analyzed. The parameters of physiology and biochemistry in animal were also measured. The tested results showed that Se contents in soil and forage from tested pastures were very greatly lower than those in the control ranges (P < 0.01), and there were no extreme differences in other elements. Se contents in blood and the liver in tested animals were very extremely lower than those in the control yaks (P < 0.01). Levels of hemoglobin (Hb), erythrocyte (RBC), and hematocrit (HCT) were very extremely less than those in the control group (P < 0.01). Activities of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), catalase (CAT), and total antioxidant capacity (T-AOC) in blood from the tested yaks were very much lower than those in the control animals (P < 0.01). Contents of malondialdehyde (MDA) in tested yaks were extremely higher than those in the control animals (P < 0.01). Therefore, it is suggested that Se-deficient forage in natural habitat not only influenced mineral contents in the blood and the liver but also causes serious harm to antioxidant function in the Choko yaks. Keywords Choko yaks . Selenium nutrition . Antioxidant capacity . Shouqu prairie . Qinghai-Tibet Plateau
Introduction The Qinghai-Tibet Plateau is the most unique alpine meadow ecosystem of the highest altitude and the largest area in all over the world [1]. It is also the largest pasture land in China [1]. The Shouqu prairie is located in the first bend of the Yellow River in the eastern region of the Qinghai-Tibet Plateau, Northwest China [2]. It is the most beautiful natural ranch with the highest primary productivity in Asia [3]. The Kui Zhao and Bin Huo contributed equally to this work and are co-first authors. * Xiaoyun Shen [email protected] 1
School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China
2
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
3
State Engineering Technology Institute for Karst Desertification Control, Guizhou Normal University, Guiyang 550025, China
4
World Bank Poverty Alleviation Project Office in Guizhou, Southwest China, Guiyang 550004, China
famous Hequ horse, Oula sheep, and Choko yak are born and bred in there [2–4]. The Choko yaks were vital to the production system in alpine grassland ecosystem in the Shouqu prairie in the eastern region of the Qinghai-Tibeta
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