Investigation And Research On Trace Element Nutrition In Pig Feed From Different Piggeries Of Shandong Province

This study was designed to investigate the effects of different supplemental pattern of copper,iron,zine and manganese on the faeces. serum trace element contents blood physiology, biochemistry and serum antioxidant index of different piggeries feed. For further study of trace element nutrition and providing a theoretical basis on environment.Samples were collectted form different piggeries in Shandong Province. In the exp 1. The three stages of(Duroc × Landrace × Yorkshine) triple hybridization pig's feed,faeces,blood sample were collectted form 12 piggeries in different area,and determ-ine the content of Cu, Fe, Zn, Mn, and blood physiology, biochemistry and serum an-tioxidant index. The differences of stool, serum, trace element content and their effection on blood physiology, biochemistry and serum antioxidant index were analysised.The results showed that: different trace element contentof feedexceeds the standard value,and the span between the maximum value and minimum value is very large.The trace element contentof feces was positive correlation with that in feed.The trace elements offeces had higher concentration coefficient. The concentration coefficients of Cu, Fe, Zn, Mn nursery pigs were 3.30, 2.58, 3.44, 3.68 respectively. and that of fattening pigwere 5.81, 5.76, 2.79, 4.64 respectively. The concentration coefficients of sowwere 2.82, 3.60, 2.20, 4.41. The trace elements of serum was enhanced with the increasingcontentof that in the feed.Blood physiological parameters and serum antioxidant index had no significant change with the elevateingtrace element content of the feed.20 three-breed cross finishing pigs(Duroc × Landrace × Yorkshire) of 70 daysin similar weightwere chosed in the experimental study. They were randomly divided into four treatment number ?, ?, ?, ?, with 5 repeats, each repeat hadone pig. 4 trace elements added processing modes are as follows: ? group to NRC(1998) model to add the recommended amount; ? group added in 2-fold NRC(1998) recommended amount mode; ? group, 3 times NRC(1998) model to add the recommended amount; ? group to four times NRC(1998) model to add the recommended amount. ?, ?, ?, ? are added in the form of inorganic salts. The results showed that: dietarywith different levels of Cu, Fe, Zn, Mn had a significant effect onthetrace elements of feces(P < 0.001), high content of trace elements in the feed, feces trace element content. Four treatment groups, serum trace elements showed no significant difference(P > 0.05), blood physiological parameters no significant difference(P > 0.05), serum biochemical parameters no significant difference(P > 0.05), serum antioxidant showed no significant difference(P > 0.05).In summary, the excess content of trace elements in the feed had no significant effect on pigs' trace element nutrition, but had burden on the environment. So we need a reasonable ratio in order to add the appropriate amount of trace elements.