Effects of Heavy Metals on Beef Production in Pasturing and Arable Farming Areas of Yining County,Xinjiang

Objective and MethodThe main purpose of the study was to detect the heavy metals of seventy one-year-old Xinjiang brown cattle slaughtered after 5 months of grazing in the Tieliekesayi Mounts with the altitude of 900 m to 1 800 m,after 3 months of fattening in Yining county Xinjiang.ResultIn the experiment, plumbum(Pb), cadmium(Cd),chromium(Cr), mercury(Hg) were not found in the samples of slaughtered beef, liver after pasturing and farm fattening. These heavy metals also were not found in soil,water samples,straw,mixture concentrates of arable farming area, the same as soil and graze of rangeland.There were not the arsenic(As)contents in above samples, except for the beef after grazing and water samples of arable farming area.The arsenic contents of Poa sikkimensis (Stapf) Bor,ELymus dahuricus Turcz and ELymus sibiricus L. were 53.41 times higher than that of Bromus inermis Leyss and Geranium wilfordii Maxim. The scope of altitude of them were 900 m to 1 450 m,and 1 500 m to 1 800 m.It indicated that there was a significant different of arsenic contents in graze (P＜0.01),and there were no significant differences in other samples(P＞0.05).ConclusionThe arsenic contents of beef liver after grazing and farm fattening were 8.91 times higher than that after pasturing.