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| 广西北部湾沿海经济区水稻及根系土硒含量特征 |
| Soils of Guangxi Beibu Coast Gulf Economic Zone |
| 投稿时间：2012-06-21 修订日期：2012-09-21 |
| DOI： |
| 中文关键词: 水稻;根系土;硒;北部湾;沿海经济区 |
| 英文关键词: paddy rice;rhizoshpere soil;selenium;Beibu Gulf;Coast Economic Zone |
| 基金项目:广西自然科学基金资助(2010GXNSFE013001)和广西壮族自治区多目标区域地球化学调查(北海地区)(GZTR2008110)资助。 |
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| 中文摘要: |
| 应用原子荧光光度法对广西北部湾沿海经济区水稻和根系土中的硒含量进行了测试。研究了水稻中硒含量与根系土中硒含量以及土壤性质之间关系。结果表明:研究区水稻中硒含量在0.021~0.335 mg/kg之间,平均值为0.074 mg/kg,标准差0.045,样品数为70件;根系土中硒含量变化范围为0.167~1.328 mg/kg,平均值为0.620 mg/kg,标准差0.230,样品数为70件。高于世界土壤表层平均值和全国表层土壤平均值,相关分析结果表明,根系土中S、有机质、P、C、N不利于水稻对硒的吸收,高CaO含量和pH有利于硒的吸收。土壤全硒量不是控制水稻硒水平的最主要因素。 |
| 英文摘要: |
| In this paper, we determined the contents of selenium in paddy rice, rhizoshpere soils and studied their relationship with soil properties. Seventy samples of paddy rice and rhizoshpere soil were collected for determining selenium concentrations by atomic flurescence spectronmetry and soil properties by various methods. The results showed the selenium contents range from 0.021 mg/kg to 0.335 mg/kg in the paddy rice with an average value of 0.074 mg/kg and a standard deviation of 0.045. The contents of selenium in rhizoshpere soils range from 0.167 mg/kg to 1.328 mg/kg with an average value 0.62 mg/kg and a standard deviation of 0.23. The average value is higher than the world and national average value. The correlation analysis showed that the contents of S, organic matter, P, C and N in the rhizoshpere soils go against the absorption of selenium. However, the high contents CaO and high pH have an advantage to the absorption of selenium. The relationship between the selenium contents in the paddy rice and those in the rhizoshpere soils indicates that selenium in the rhizoshpere soils is not an important factor affecting the contents of selenium in the paddy rice. |
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