| 周文龙,张涛,吴昭阳,杨志忠,杨朝贵.黔南荔波地区耕地土壤中硒的分布特征及影响因素分析[J].贵州地质,2020,37(3):313-319 |
| 黔南荔波地区耕地土壤中硒的分布特征及影响因素分析 |
| Characteristics of Soil Selenium Distribution of Cultivated Land and Its Influential Factors in Libo of South Guizhou |
| 投稿时间：2020-03-24 |
| DOI： |
| 中文关键词: 耕地 土壤硒 分布特征 影响因素 |
| 英文关键词:Cultivated land Soil selenium Distribution characteristic Influential Factors |
| 基金项目:贵州省公益地勘基金项目(黔耕调(2017-03)，黔色耕调(2017-03-33))资助。 |
|
| 摘要点击次数: 551 |
| 全文下载次数: 328 |
| 中文摘要: |
| 依据贵州省荔波县耕地质量地球化学调查数据，分析了耕地土壤中硒的分布特征和影响因素。结果显示耕地表层土壤硒含量在002×10-6949×10-6之间，硒平均含量为042×10-6，富硒耕地(04×10-630×10-6)占总耕地面积达6199%。分析显示:①成土母质(母岩)对土壤中硒元素的含量具有控制作用，土壤硒高值区与炭质泥页岩、煤系地层展布区吻合，粘土岩、泥页岩、砂岩等分布区对应大面积的土壤硒低值区，而黎明关水族乡一带耕地土壤硒的相对富集与碳酸盐岩风化过程中硒的次生富集作用相关；②不同利用方式土地中土壤硒含量呈现出茶园＞林地＞草地＞旱地＞果园＞水田的特点；③土壤有机含量与硒含量呈现正相关性。 |
| 英文摘要: |
| Soil selenium of cultivated land and its influential factors were analyzed which based on the investigation data of geochemistry in Libo county of Guizhou Province. The results showed that selenium content in topsoil was 0.02×10-69.49×10-6，the average selenium content was 0.42×10-6.The selenium-rich cultivated land(3.0×10-60.4×10-6)accounted for 61.99% of the total cultivated land area. The results show that: ①The parent material of soil has a controlling effect on the content of selenium in topsoil, the high value area of selenium in topsoil is consistent with the distribution area of coal measure strata and carbonaceous shale strata, and there are large area of low value area of selenium in topsoil in the distribution area of shale and sandstone strata. However, the relative accumulation of selenium in the cultivated soil in Li-ming-guan area is related to the secondary accumulation of selenium in the weathering process of carbonate rocks;②The selenium content in topsoil of different land use patterns is as follows: tea garden＞woodland＞grassland＞drylands＞orchards＞paddy fields; ③ There was a positive correlation between soil organic content and selenium content. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
