| 摘要 |
[Objective] The paper was to study the contents of Ca and its interaction elements in pig feeds in Guangdong Province. [Method] Creep feed, nursery feed, piglet feed, pregnant sow feed and lactating sow feed were randomly taken from different manufacturers for testing. [Result] The average contents of copper (Cu), iron (Fe), manganese (Mn), zinc (Zn), magnesium (Mg), and vitamin D3 (VD3) in all kinds of feeds exceeded the Chinese feed additive standards. The contents of trace elements like Cu, Fe, Mn, and Zn were significantly higher than the standard additions. The contents of Cu, Fe, and Mn in piglet feeds were increased by 27.16 times, 4.47 times and 24.27 times, respectively, and that of Zn was increased by 16.99 times; the ratio of Mg average addition amount to the standard addition was 4.18-5.38; the average contents of Ca and P in feeds were lower than the standard additions, among which Ca decreased by 0.18%-0.44%, P decreased by 0.07%-0.32%, and the proportions of Ca and P were lower than the standard proportion except piglet feed; VD3 addition in pig feeds was significantly higher than the standard addition, in which the content of creep feed was 20.76 times of the standard addition; the average addition of fluorine (F) was increased with the increase of age, and the highest was up to 20.06 mg/kg. [Conclusion] There is a great difference in the addition of each element in pig feeds, and most of them are higher than the standard additions. |
