中国农业科学(英文版)2009，Vol.8Issue(8)：1000-1003,4.
Sulfur-Induced Copper Deficiency in the Yaks
Sulfur-Induced Copper Deficiency in the Yaks
摘要
Abstract
Since the 1990s, yak in the Haizi area in China has been affected by an ailment characterized by pica, emaciation, dyskinesia,and anemia. To determine the cause of disease, the mineral composition of soil and forages, and samples of blood, hair,and liver of yaks from the Haizi area in China were determined. The concentrations of copper in soil and forage from affected ranches and unaffected areas are within the normal ranges. The mean concentration of copper in blood and liver from the affected yaks was (0.31± 0.03) and (13.7 ± 3.1)μg g-1, respectively, compared with (0.98±0.16) and (95.6±11.2)μg g-1for unaffected yaks. The concentrations of sulfur in soil and forage from affected ranches were (1.91±0.26) and (1 .37±0.17)%, respectively, compared with (1.11±0.31) and (0.52±0.18)% (dry matter) for normal areas. The contents of sulfur in blood and liver affected animals were (7.32 ± 1.8) and (2.54 ± 3. 1)%, respectively, compared with (4.22±0.73) and (1.31 ± 0.33)% (in fresh and soft tissues) for healthy animals, respectively. Oral administration of tribasic copper chloride prevented and cured the disease. Thus it is reasonable to conclude that ailments of yaks in the Haizi area are probably caused by a secondary copper deficiency, mainly due to high sulfur content in soil and forage.关键词
yak/sulfur/copper/nutrition/diseaseKey words
yak/sulfur/copper/nutrition/disease分类
农业科技引用本文复制引用
SHEN Xiao-yun..Sulfur-Induced Copper Deficiency in the Yaks[J].中国农业科学(英文版),2009,8(8):1000-1003,4.基金项目
This work was supported financially by the National Natural Science Foundation of China (90202009). My grateful thanks go to assistants Li Yali and Zheng Xiaofei of Maqu Biology Institute, China, for help in the investigations and sampling in the field. We also thank Li Yingfan of Yongding People's Hospital, China, for assistance with laboratory analysis. （90202009）
