| 藏中矿区家畜组织中重金属分布与放牧环境关系研究 |
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| 引用本文： | 赵玉文,李瑛萍,段少荣,南吉斌,赵亚磊,赵玉红.藏中矿区家畜组织中重金属分布与放牧环境关系研究[J].家畜生态学报,2020,41(1):62-67. |
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| 作者姓名： | 赵玉文 李瑛萍 段少荣 南吉斌 赵亚磊 赵玉红 |
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| 作者单位： | 西藏农牧学院资源与环境学院,西藏林芝860000;西藏农牧学院动物科学学院,西藏林芝860000 |
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| 摘 要： | 以藏中矿区土壤、牧草、家畜组织为对象,探讨土-草-畜系统中Cu、Zn、Pb、Cd这4种重金属分布情况与饲养环境的相关性。通过设立研究点的方法,采集矿区饲养环境中的土壤、牧草、家畜(牦牛、藏羊)组织进行含量检测。结果表明:藏中矿区及周边土壤中重金属Cu、Zn、Pb、Cd这4种元素均高于我国二级土壤限量值,Cu含量达限量值的2倍以上,Cd超标最严重。牧草、家畜组织体内重金属含量出现超标现象,牧草含量的分布顺序为Zn>Pb>Cu>Cd,这与土壤中重金属含量表现一致。牦牛体内Zn元素含量与远离矿区家畜(CK)相比差异显著(P<0.05),Cd含量与对照(CK)相比差异显著(P<0.05)。Cu、Zn存在超标现象,Cd、Pb两者存在差异但均未超标。矿区牦牛肉中Cu和牧草中Cu含量呈极显著的相关关系(P=0.836,P<0.01);牦牛肉中Zn含量与土壤和牧草中的Zn含量呈显著的相关关系(土壤P=0.631,牧草P=0.667,P<0.05);牦牛肉中Pb含量与牧草中Pb含量呈显著的相关关系(P=0.520,P<0.05);藏羊肉中Cu含量与牧草中Cu含量呈极显著相关关系(P=0.756,P<0.01)。矿区可食牧草中重金属向牦牛和羊肌肉迁移系数变化较大,迁移系数在0.19%~44.61%之间。
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| 关 键 词： | 家畜组织 重金属 饲养环境 相关性 矿区 |
Correlation between Heavy Metal Distribution in Tissue of Livestock in Mining Area in Central Tibet and the Breeding Environment |
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| ZHAO Yuwen,LI Yingping,DUAN Shaorong,NAN Jibing,ZHAO Yalei,ZHAO Yuhong.Correlation between Heavy Metal Distribution in Tissue of Livestock in Mining Area in Central Tibet and the Breeding Environment[J].Acta Ecologae Animalis Domastici,2020,41(1):62-67. |
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| Authors: | ZHAO Yuwen LI Yingping DUAN Shaorong NAN Jibing ZHAO Yalei ZHAO Yuhong |
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| Institution: | (Department of Resources and Environment,Tibet College of Agriculture and Animal Husbandry;Department ofAnimal Science,Tibet College of Agriculture and Animal Husbandry,Linzhi Tibet,860000,china) |
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| Abstract: | In this study, the soil, herbage and livestock tissues in the mining area of the central Tibetan Plateau were taken as objects to investigate the relationship between the distribution of heavy metals Cu, Zn, Pb, and Cd in the soil-herbage-livestock system and the feeding environment. Through the establishment of a research site, the soil, herbage, livestock(Yak and Tibetan sheep) tissues in the breeding environment of the mining area were collected for content determination. The results show that the contents of Cu,Zn, Pb, and Cd in the soils in the mining area and surrounding areas of the central Tibetan Plateau were higher than the secondary soil limits in China, and the Cu content was more than 2 times of the limit value, among which the Cd is the most serious. The contents of heavy metals in herbage and livestock tissues also exceeded the standard. The order of the contents of herbage was Zn>Pb>Cu>Cd, which was basically consistent with the content of heavy metals in soil. The content of Zn in yak was significantly different from that in yak far away from the mining area(P<0.05), and the difference in Cd content was also significant compared with the control(CK)(P<0.05). Excessive levels of Cu and Zn existed, and there were differences between Cd and Pb but none of them exceeded the limits. There was a very significant correlation between Cu and forage in the yak meat of the mining area and Cu content(P=0.836, P<0.01). In addition, there was a significant correlation between Zn content in the yak meat and that in the forage herbage(soilP=0.631, herbage P=0.667, P<0.05). Pb content in yak beef was significantly correlated with Pb content in herbage(P=0.520, P<0.05);Cu content in Tibetan sheep meat was highly correlated with that in herbage(P=0.756, P<0.01). The migration coefficient of heavy metals in grazing forages and Tibetan sheep muscles in the edible forages in the mining area changed greatly, and the migration coefficient ranged between 0.19% and 44.61%. |
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| Keywords: | livestock tissue heavy metal breeding environment correlation miningarea |
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