Differentiation characteristics and source analysis of heavy metals in typical brown soil under different vegetation

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Dong, Zhicheng^1 ; Zhang, Lina^1 ; Li, Xueshuang^1 ; Lv, Shuangyan^1 ; He, Shijie^1 ; Liu, Ying^1 ; Ma, Xuanxuan^1

School of Resources and Environmental Engineering, Ludong University, Yantai, China^1

关键词: Accumulation characteristics;    Distribution characteristics;    Electrical conductivity;    Element concentrations;    Field investigation;    Organic fertilizers;    Vertical differentiation;    Vertical distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012103/pdf
DOI  :  10.1088/1755-1315/81/1/012103

来源: IOP

【 摘 要 】

Anomalous enrichment of soil elements (especially heavy metals) has aroused popular attention in China. In order to discuss distribution characteristics and analyze sources of elements in brown soil, field investigation and sample collection were carried out under different vegetation (cherry, apple, bamboos and pine) in Qixia, a typical apple production base in China. Element contents, pH, electrical conductivity (EC) and magnetic susceptibility (MS) were tested. Results showed that element concentrations were about roughly 2.48 times as China's background values, while significantly lower than the class ii of National soil Environment Quality Standard (Ni excepted). Meanwhile, vertical distribution and accumulation characteristics of elements in typical brown soil were significantly different under different vegetation. In detail, elements (Zn excepted) of Pine soil accumulated in surface, while they (Cd, Arsenic excepted) increased with depth under other vegetation. Moreover, pH and EC changed like elements, while MS was exactly opposite. It was found that those differences above were mainly caused by human activities (such as improper use of fertilizer, pesticide and inadequate use of organic fertilizer, etc.). Additionally, differences in composition and decomposition rate of vegetation litter also resulted in vertical differentiations of soil elements under different vegetation.