Jiangxi Research Academy of Ecological Civilization, Nanchang 330036, China.
Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China.
Int J Environ Res Public Health. 2022 Mar 31;19(7):4125. doi: 10.3390/ijerph19074125.
The influences of different land uses associated with human activities on soil quality and the redistribution of heavy metal in soil have been widely concerned. Surface soil samples were obtained to assess comprehensive soil quality in a typical red soil region of southern China, combining the heavy metal pollution evaluation with fertility evaluation. It can be learned from the results that the overall level of soil fertility was at medium and lower level, and soil heavy metal pollution risk in the study area in a few regions had reached warning line and slight pollution line, and there was a risk of potential pollution. TOPSIS evaluation results showed that the comprehensive soil quality was mainly good quality and moderate quality, accounting for 31.7% and 29.0% of the total land area, respectively. Positive matrix factorization (PMF) model results showed that transportation source contributes a lot in terms of Cd and Pb. As for Cr, natural source contributes 53.8%. In terms of Cu and Zn, agriculture source contributes 50.7% and 38.7%, respectively. In a word, the comprehensive soil quality assessment in red soil region of southern China provides an important basis for the scientific management and sustainable utilization of soil resources.
不同土地利用类型与人类活动相关联对土壤质量和重金属在土壤中重新分布的影响受到广泛关注。本研究采集表层土壤样品,结合肥力评价对中国南方典型红壤区的综合土壤质量进行评估。结果表明,土壤肥力整体处于中下水平,研究区部分区域土壤重金属污染风险已达到警戒值和轻污染线,存在潜在污染风险。逼近理想解排序法(TOPSIS)评价结果表明,综合土壤质量主要为优质和中等质量,分别占总土地面积的 31.7%和 29.0%。正定矩阵因子分解(PMF)模型结果表明,交通源对 Cd 和 Pb 有很大贡献。对于 Cr,自然源贡献了 53.8%。对于 Cu 和 Zn,农业源分别贡献了 50.7%和 38.7%。总之,中国南方红壤区的综合土壤质量评估为土壤资源的科学管理和可持续利用提供了重要依据。