山东省不同土类微量元素含量及分布状况

结合83个县土壤普查，测定6千多个土样，通过微机处理数据，对山东省不同土类微量营养元素含量分析汇总。认为本省土壤以缺硼、锌为主，部分缺锰；在3个地貌区的分布有明显规律，元素间有密切相关；各土类各元素的丰缺也有明显规律，并多呈正偏态分布，应以中位数和平均差表示之；本省土壤工作分类基本适于研究微量元素含量分布和应用微肥的依据；各元素在土壤剖面中含量多随深度而降低；土壤微量元素与成土母质关系密切，pH、碳酸钙也是重要的影响因素。

CONTENT AND DISTRIBUTION OF TRACE ELEMENTS IN THE SOILS OF SHANDONG PROVINCE

Soils in Shandong were found to be deficient in available Zn (0.5ppm), B(0.5ppm), Mn(10ppm) making up 63.7%, 65.4% and 48.4% of the total respectively, and rich in available Cu, and contained moderate available Fe. The available B and Cu increased from Southeast to Northwest Shandong with the Yellow River as a clear dividing line. However, the available Fe and Mn content showed opposite trend with the Jiaolai and Shuhe River as the dividing line. Available Zn content in the soils of hilly region was higher than that of lowland and plain areas.These trace elements in different soil types showed skew distribution which could be exactly described with median, upper and lower limits or average deviation.Brown earth belonged to low B and high Fe and Mn group;cinnamon soil and Shajiang black soil,low Zn and B; fluvo-aquic soil low Zn, Mn and high Cu; saline soil low Zn and high B and Cu; aeolian soil low Zn, B and Mn, paddy soil low Zn and B, and high Cu, Fe and Mn group. Cluster analysis showed that the soil classification of Shandong was applicable to the study of content and distribution of soil trace elements and application of these elements. The vertical distribution of soil available Zn and B decreased with the depth except that of easily reducible Mn.