The Determination And Analysis Of Seven Trace Elements In Junlian County Of Sichuan Province

Trace elements play an important role in the body’s physiological and biochemical activities. The deficiency or excess of Livestock trace element can cause nutritional and metabolic disorders. Soil is the source of trace element, which is closely related to it’s level in forage or livestock. Soil, forage and livestock constitute the system of microelement bio-utilization.Junlian county is the important beef cattle breeding base in southwest of China, which is located in the southern margin of the sichuan basin. Wumeng Junlian Cattle is suitable for mountain farming, which is not only taste specially but also known as the selenium-rich food. The regional investigation aimed to explore the trace elements of junlian beef cattle, and the relevance of trace elements among junlian beef cattle, soil and forage was analyzed. Four townships, as LianHe, GaoPing, DaXueshan and ShuangTeng, were elected as the representative test sites in Junlian county. Samples including the soil, junlian pasture, hair and serum of the wumeng junlian cattle had been collected to measure the content of the trace elements (as Fe, Zn, Mn, Co, Cr, Cu, Se) by atomic absorption spectrometry.The results showed that:1) The contents of Fe, Mn, Zn, Co, Cr, Cu, Se in soil among the towns showed significant difference. The contents of Mn in soi of the four townships were lower than that of normal content, and the levels of Mn in ShuangTeng, DaXueshan were significantly lower. The contents of Cu in soil of Gaoping and ShuangTeng were both lower than that of normal content.The contents of Fe, Mn, Co, Cr, Cu, Se in soil were gradually increased from north to south with the decreases of latitude.2) In forage, the contents of Fe, Mn, Co, Se were rich in four towns, Zn was rich in LianHe and Da Xueshan, Cr was rich in GaoPing.3) The wumeng Junlian cattle’s hair and serum of four towns contained abundant Se, Mn, Zn, Co, but the contents of Fe, Cr, Cu were in the nomal range.4) The contents of Fe, Mn, Zn, Se were highly correlated between soil and forage (P<0.01). The contents of Mn, Se in grass and livestock were significantly correlated, as well as the soil and livestock.Conclusion:The soil in four townships of Junlian county was in lack of Mn, and Cu was lack in the soil of ShuangTeng. The forage in Lian He and Da Xueshan was rich in Zn, and the Cr was also slightly higher in DaXueshan. The hair of the beef cattle in all towns were rich in Fe, Zn, Cu, Se, and the serum were rich in Fe, Mn, Zn, Co, Cu. The hair of the beef cattle in ShuangTeng was rich in Mn、Co, and the serum of beef cattle in ShuangTeng and GaoPing was rich in Se. The contents of the trace elements showed a complex relationship among the soil, forage and the hair and serum of the beef cattle, which were affected by the feeding conditions, regional environment, growth stages of forage grass and the ways of livestock feeding, etc.