| 罗小玲,梁耀杰,王中伟,谢志宜,陈多宏,刘军.广东省土壤镍背景值时空变化特征与影响因素[J].农业环境科学学报,2025,44(12):3108-3121. |
| 广东省土壤镍背景值时空变化特征与影响因素 |
| Temporal and spatial variation characteristics and influencing factors of soil nickel background value in Guangdong Province |
| 投稿时间：2025-07-19 |
| DOI：10.11654/jaes.2025-0694 |
| 中文关键词: 广东 土壤 背景值 镍 时空变化 |
| 英文关键词: Guangdong soil background value nickel temporal and spatial changes |
| 基金项目:国家重点研发计划项目（2024YFE0202000） |
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| 摘要点击次数: 931 |
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| 中文摘要: |
| 为阐明广东省土壤镍背景值的变化趋势及其影响因素，本研究基于 2018年和 2022年在背景值区域开展的定点监测，分析了土壤镍含量的变化特征；采用地理加权回归分析法，探究了自然因素、人为因素和理化性质对背景值区域土壤镍含量的影响。结果表明：广东省背景值区域A层土壤镍含量总体偏低，空间上呈“中部低、四周高”的分布格局，高值区位于粤西雷州半岛，次高区位于粤北山区和珠三角沿海局部地区。在原始数据尺度下，2022年全省背景值区域A层土壤镍含量中位值、算术均值分别为13.0、17.6 mg·kg-1，较2018年分别下降了1.0、0.4 mg·kg-1，几何均值为12.6 mg·kg-1，较2018年上升了1.5 mg·kg-1；对数转换后均值下降幅度约为11%，表明背景区域土壤镍含量总体呈下降趋势。研究表明，在各类可变影响因素中，理化性质（尤以阳离子交换量）对土壤镍含量的影响较大，人为和自然因素干扰有限。 |
| 英文摘要: |
| In order to clarify the variation trend of soil nickel background value and its influencing factors in Guangdong Province, this study analyzed the variation characteristics of soil nickel content based on the fixed-point monitoring in the background value area in 2018 and 2022. Geographically weighted regression analysis was used to explore the effects of natural factors, human factors and physical and chemical properties on soil nickel content in the background value area.The results showed that the soil nickel content in the A layer of the background value area in Guangdong Province was generally low, and the spatial distribution pattern was‘low in the middle and high around’. The high value area was located in the Leizhou Peninsula in western Guangdong, and the second high area was located in the mountainous area of northern Guangdong and the coastal area of the Pearl River Delta. At the original data scale, the median, arithmetic mean and geometric mean of soil nickel content in layer A of the province's background value area in 2022 were 13.0, 17.6 mg·kg-1 and 12.6 mg·kg-1, respectively, which decreased by 1.0, 0.4 mg·kg-1 and increased by 1.5 mg·kg-1 compared with 2018. After logarithmic transformation, the mean value decreased by about 11%, indicating that the soil nickel content in the background area generally showed a downward trend. In summary, among the various variable influencing factors, physical and chemical properties（especially cation exchange capacity）have a greater impact on soil nickel content, and human and natural factors have limited interference. |
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