| 宁夏石嘴山市农用地土壤硒的富集因素 |
| 摘要点击 4685 全文点击 446 投稿时间：2021-09-22 修订日期：2021-12-16 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 土壤硒 特征 富集因素 碱性土壤 石嘴山 |
| 英文关键词 soil-Se characteristics enrichment factors alkaline soil Shizuishan City |
|
| 中文摘要 |
| 石嘴山市是典型的枯竭型资源城市，为发展富硒农产品种植业和促进城市绿色可持续发展转型，在石嘴山市开展富硒土壤调查.采集农用地中7399个表层（0~20 cm）土壤样、30个大气沉降样和9个成土母岩样，运用GS+、ArcGIS和SPSS软件通过构建半方差变异函数模型、普通克里金插值、统计学的相关分析和均值分析等方法对土壤硒（Se）的含量、空间分布和富集因素进行分析，对碱性土壤区Se的富集特征进行探索归纳.结果表明，石嘴山市农用地表层土壤ω（Se）为（0.26±0.12） mg·kg-1，空间分布自相关性极强，Se含量变化与自然因素相关，离贺兰山山前煤矿聚集地近者Se含量较高；成土母质是控制土壤Se富集的首要因素，土壤理化性质如有机质、pH和铁锰氧化物等均对Se在表生环境中富集有一定影响；相比强碱性环境，碱性条件更利于Se的富集. |
| 英文摘要 |
| Shizuishan is a typical exhausted resources-based city in the northern area of the Ningxia Hui autonomous region in China. In order to develop the planting industry of selenium (Se)-rich agricultural products and promote green and sustainable urban development and transformation, investigations on the quality of Se-rich land were carried out in Shizuishan City, where 7399 surface soil (0-20 cm) samples of farmlands, 30 atmospheric precipitation samples, and nine parent rocks were collected. By means of semi variogram model construction by GS+, Kriging interpolation in ArcGIS and statistics via SPSS, such as correlation analysis and mean-value analysis, the content, spatial distribution, and enrichment factors of Se-soil were analyzed. Further, the enrichment characteristics of soil Se in alkaline conditions were summarized. The results indicated that ω(Se) in surface soil was (0.26±0.12) mg·kg-1, and its spatial distribution was highly auto-correlated. The variation in Se content was related to natural factors. Along Helan Mountain, the content of Se in the surface soil was comparatively higher than that where coal mines were located. The parent rock was the principal factor that controlled the enrichment of soil Se. The physical and chemical properties of soil such as organic material, pH, and iron and manganese oxides had crucial effects on the enrichment of soil Se in a surficial environment. Compared to a strong alkaline environment, alkaline conditions were beneficial for the enrichment of Se in the surface soil. |
|
|
|
