摘要
重庆土壤中有效态微量元素含量差异较大,按全市平均计,土壤有效锰、铁及铜含量比较丰富,分别为35.0、51.4及1.45ppm,而有效锌、钼和硼的含量较低,分别为0.99、0.082和0.19ppm。其分布频率比较分散。但有效钼和硼的90％以上集中于1、2级,锰、铁、铜则大部分集中于4、5级。有效态微量元素在土壤剖面中的分布随土壤类型而异,多数情况为耕层高于下层,富集占优势。土壤ph值、有机质含量、成土母质及农业利用方式等对土壤中微量元素的有效化有一定关系。
The contents of available copper, iron and manganese of the soil i Chongqing are rather high with mean values of 1.45, 35.0 and 51.4ppm respectively. However there is a considerably large area with rather low or defiecient contents of Molybdenum, Boron and Zine in soils. The contents of available Mo and B are mostly lower than the criticul values, The mean values of Mo、B、Zn are 0.082, 0.19, 0.99ppm respectively. The availability of the trace elements is mainly related with pH values. Organic matter contents and parent materials of the soils.
出处
《西南农业大学学报（自然科学版）》
CSCD
1989年第3期221-228,共8页
Journal of Southwest Agricultural University
关键词
土壤
养分
微量元素
含量
分布
available nutrient of soil
microelement
content
distribution
Chongqing.
