土壤微量元素含量及其影响因素的研究

论述了临沂市土壤中硼、锌、锰、铜、铁等5种主要微量元素的状况与其它因素的关系。有效硼含量0.09~3.67 mg/kg,平均0.35 mg/kg;有效锰22~572 mg/kg,平均244 mg/kg;有效锌0.15~4.02 mg/kg,平均0.53 mg/kg;有效铜0.09~5.78 mg/kg,,平均1.03 mg/kg;有效铁3.2~162 mg/kg,平均21.5 mg/kg;有效锰2.0~131.4 mg/kg,平均23.4 mg/kg。不同土壤类型的以上5种微量元素有明显差异,其特征是砂姜黑土缺锌,棕壤、水稻土富含铁、铜、锰、锌;成土母质是影响土壤微量元素的重要因素之一,发育在基性岩上的土壤一般含量较高,而由红土母质发育的土壤则含量较低。土壤有机质含量与土壤微量元素有明显正相关关系,其中速效锌、速效硼和速效铜与有机质的关系尤为显著。

Research on the content of soil micronutrients and affecting factors

The relationship between the five micronutrients(B,Zn,Mn,Cu,Fe) in soil of Linyi city and the other factors was discussed in this paper.Concentrations of the five microelements exist obviously differences among different soil group,and Zn deficient in Lime concretion black soil and Zn,Mn,Cu,Fe sufficient in Brown earth or paddy soil.Parent material was one of the key factors affecting the content of micronutrients in soils.Contents of the five micronutrients were high in soil developed from base rock,while the micronutrients contents in soil developed from red soil parent material were low.Soil organic matter content showed significant positive linear relation with the contents of micronutrients in soil,especially for the of available Zn,B and Cu.