| 任蕊,王明霞,陈继平,晁旭,王晖,谢颖,孟秦宇.陕西关中地区土壤硒分布特征及影响因素[J].矿产勘查,2018,9(9):1827-1833 |
| 陕西关中地区土壤硒分布特征及影响因素 |
| Distribution of soil selenium in Guanzhong Area and its influencing factors |
| 投稿时间：2018-07-15 |
| DOI： |
| 中文关键词: 土壤硒含量 影响因素 关中地区 |
| 英文关键词: soil selenium content, influencing factor, Guanzhong area |
| 基金项目:全国土壤现状调查及污染防治(编号:GZTR20050102)和西北五省耕地区1∶25万土地质量地球化学调查(编号:DD20160319)和陕西省关中地区碱性富硒土地开发利用综合研究项目(编号:20180307)资助。 |
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| 摘要点击次数: 1978 |
| 全文下载次数: 734 |
| 中文摘要: |
| 富硒土地的价值在于其能开发出天然富硒农产品,为当地农民增收、农业增效、精准扶贫做出积极贡献。文章系统总结了关中地区39 500 km2范围内土壤硒的含量特征和影响因素。结果发现,研究区有富硒土地8245.12 km2,主要分布在渭河两岸。深层土壤以低硒为主要分布特征,占全区面积的88.23%。表层土壤硒含量相对于深层土壤明显富集,继承成土母质(深层土壤)程度较弱,进一步研究显示,风沙土、潮土和水稻土的深、表层土壤硒存在弱相关,黄绵土、褐土、新积土等表层土壤硒的富集作用与深层土壤硒含量没有显著关联。土壤类型是影响关中地区土壤硒含量的主要因素,不同类型土壤中有机质对硒具有明显的富集作用,pH值对硒的约束存在显著差异。 |
| 英文摘要: |
| The value of selenium-rich soil lies in development of natural selenium-rich agricultural products, making contributions to the increase of peasants’ income, and the improvement of agriculture benefits as well as target of poverty-alleviation. This paper systematically summarizes the characteristics and influencing factors of the soil selenium amount of 39500 km2in Guanzhong region The result shows that the selenium-rich soil in the study area is 8245.12 km2, mainly distributed on both sides of the Weihe River. The deep soil is characterized by low content of selenium, which occupies 88.23% of the total area. The selenium content in the surface soil is significantly rich compared to that of the deep soil, and the degree of inheritance of the soil parent material (deep soil) was weak.. Further research shows that the selenium content of both deep and surface soils in the aeolian sandy soil, moisture soil and the paddy soil have weak correlation among them. There is no significant correlation between the enrichment of the selenium in the surface soil of loessal soil, cinnamon soil and the alluvial soil with the deep soil’s selenium content. The main factor affecting the soil’s selenium content in Guanzhong area is the different soil types. Organic matters in different types of soil play a obvious role in selenium accumulation in soil, while the pH value is a significant constrain to selenium. |
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