宁夏土壤、饲料及猪禽日粮主要微量元素含量盈缺分析初探

A PRELIMINARY ANALYSIS OF MAJOR TRACE ELEMENT IN SOIL, FEED AND ANIMAL RATION IN NINGXIA

分析表明 ,宁夏地区土壤微量元素Zn、Mn、Cu、Fe全量平均值分别为 6 3.1mg/kg ,5 0 6 .6mg/kg ,2 .76mg/kg和 2 4.0mg/kg,有效含量平均值分别为 0 .5mg/kg、6 .5 3mg/kg ,1 .38mg/kg和 1 8.6mg/kg ,含量盈缺临界值分别为 0 .5mg/kg、7.0mg/kg、0 .5mg/kg和 5 .0mg/kg。而不同类型土壤微量元素含量及有效含量水平变异较大 ,有效态微量元素缺乏的频率依元素种类变化亦很大 ,全区各县 (市 )呈现较大的不平衡性。主要饲料中微量元素含量存在不同程度的区域性差异 ,不同原料中同种元素含量差异更大。与McDowell建议的微量元素临界含量判定值比较 ,盈缺的大体规律是Fe足够、Cu满足 ,Zn、Mn、Se普遍缺乏。猪、鸡典型日粮 (玉米—黄豆型 )中Zn普遍缺乏 ,Mu、Se有不同程度短缺 ,需在日粮中对症添加。

The results of analysis showed that in soil of Ningxia, the total mean content of Zn, Mn, Cu, Fe are 63.1, 506.6, 2.76, 24.0 mg/kg, and the average effective contents are 0.5, 6.53, 1.38, 18.6mg/kg respectively. The bounds of the elements are 0.5, 7.0, 1.5, 5.0 mg/kg separately. The content of the trace elements varies in different soil type. The lack frequency of trace elements in effective varies according to different elemnts. The effective content of trace elements in soil is obviously related to organic material content in the soil. The rough content regularity of the trace elements in the main feed in Ningxia is as follows: Fe is enough, Cu is content, Zn, Mn, Se are lack generally. The typical ration for pigs and chicken in Ningxia are lack of Zn, Mn, Se to different extent, and needs to be added with these trace elements.