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Molybdenum fertilizer improved antioxidant capacity of Chinese Merino sheep under compound contamination

文献类型： 外文期刊

作者： Li, Yuanfeng 1 ; Zhou, Ping 2 ; Shen, Xiaoyun 1 ; Zhao, Kui 3 ;

作者机构： 1.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Mianyang 621000, Sichuan, Peoples R China

2.Xinjiang Acad Agr & Reclamat Sci, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi 832000, Xinjiang, Peoples R China

3.Guizhou Normal Univ, Sch Mat & Architectural Engn, Guiyang 550025, Peoples R China

关键词： Chinese merino sheep; Compound pollution; Molybdenum fertilization; Antioxidant capacity

期刊名称：BIOLOGICAL TRACE ELEMENT RESEARCH （ 影响因子：4.081； 五年影响因子：3.755 ）

ISSN： 0163-4984

年卷期：

页码：

收录情况： SCI

摘要： To investigate the response of different levels of molybdenum (Mo) fertilizer to Chinese Merino sheep (Junken Type) grazing on natural heavy metal-contaminated meadows, this study was carried out in the Bayanbulak Grassland lying in the northwest of Xinjiang Uygur Autonomous Region, China. A total of 24-hm(2) polluted meadows were fenced and were randomly divided into four groups (3 replication/group and 2 hm(2)/replication) applied 0-kg Mo, 1-kg Mo, 2-kg Mo, and 3-kg Mo (ammonium molybdate tetrahydrate) per hectare for the CON group, group I, group II, and group III, respectively. Seventy-two healthy 1-year-old Chinese Merino sheep (45.56 +/- 2.35 kg) were randomly assigned to the tested pastures for 90 days. Compared with the CON group, the Mo content from fertilized groups and the Se content from group II and group III in serums and livers were significantly increased (P < 0.05), and the Cu content from fertilized groups in serums and livers was significantly decreased (P < 0.05). The levels of blood Hb and RBC, and the activities of serum SOD, CAT, GSH-Px, and Cp in group III, were significantly higher (P < 0.05) than those in the CON group, group I, and group II. Serum MDA content in group III was significantly lower (P < 0.05) than that in the other three groups. In summary, Mo fertilization improved the antioxidant capacity of grazing sheep and also reduced the toxic damage to Chinese Merino sheep grazing on natural grasslands contaminated by heavy metals, but Mo poisoning caused by excessive fertilization should be prevented.

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