| 土壤性质对土壤–水稻系统中硒迁移的影响 |
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| 引用本文： | 周 骏,刘兆云,孟立丰,朱 晨.土壤性质对土壤–水稻系统中硒迁移的影响[J].土壤,2016,48(4):734-741. |
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| 作者姓名： | 周 骏 刘兆云 孟立丰 朱 晨 |
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| 作者单位： | 浙江大学地球科学学院,杭州,310027 |
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| 基金项目： | 国家自然科学基金项目(41302165)和浙江省地质勘查资金项目(省资2014002)资助。 |
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| 摘 要： | 采集浙江省北部水稻种植区成熟期水稻和对应的土壤样品,分析土壤中硒(Se)总量和7种形态Se的含量以及水稻根、茎、叶、谷各部位的Se含量。结果表明:研究区土壤Se平均含量0.344 mg/kg,达到中Se土壤水平,并且与土壤有机质含量呈显著正相关。7种Se形态中,强有机结合态和腐植酸结合态是主要的两种形态,占Se全量的75.92%;离子交换态、水溶态的含量在1.7%左右;碳酸盐结合态为3.2%。水稻根部富集了大部分的Se(73%),其各部位中Se含量随根、叶、茎、谷的顺序依次减少。将土壤按有机质和p H的大小进行分区分析后发现,当有机质含量小于25 g/kg时,土壤铁锰氧化物结合态Se与水稻根部Se呈显著正相关;当有机质含量大于35 g/kg时,土壤铁锰氧化物结合态Se与谷Se呈显著正相关;当p H7时,碳酸盐态Se与谷Se呈显著负相关。水溶态Se和离子交换态Se与水稻各部位Se含量之间并未呈现明显的相关性。水稻各器官Se含量受土壤p H、有机质含量、各形态Se含量等土壤性质的交互作用影响。
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| 关 键 词： | 土壤 水稻 硒 形态分析 |
| 收稿时间： | 7/4/2015 12:00:00 AM |
| 修稿时间： | 9/4/2015 12:00:00 AM |
Selenium Transport in Soil-Paddy Plant System influenced by Soil Properties |
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| ZHOU Jun,LIU Zhaoyun,MENG Lifeng and ZHU Chen.Selenium Transport in Soil-Paddy Plant System influenced by Soil Properties[J].Soils,2016,48(4):734-741. |
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| Authors: | ZHOU Jun LIU Zhaoyun MENG Lifeng and ZHU Chen |
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| Institution: | School of Earth Sciences, Zhejiang University,School of Earth Sciences, Zhejiang University,School of Earth Sciences, ZheJiang University,School of Earth Sciences, ZheJiang University |
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| Abstract: | This paper presented the content and speciation studies of selenium in the paddy soils as well as the selenium content in the correspond organs (root, stem, leaf, rice) of matured rice plants from the North Zhejiang Province. The results show that the studied paddy soils belong to the medium selenium rich soils with the average selenium contents at 0.344mg/kg. There is significant positive correlation between the total selenium contents and the total organic matter. Seven different selenium species were separated from the paddy soils with the strongly organic combined and humic acid combined selenium account for about 75.92%, the ion exchangeable and soluble selenium is about 1.7% and the carbonate combined selenium is about 3.2%. The root system of the rice plant has the selenium content up to73% of the total amount of the plant. The amount of selenium in stern is higher than in fringe but lower than in leaves. There is a significant positive correlation between the oxides of iron and manganese combined selenium and the amount of selenium in the root when the total organic matters in the soils lower than 25g/kg, while this type of selenium in the soils has a significant positive correlation with the selenium in the fringe when the total organic matters in the soils higher than 35g/kg; it also worth to notice that the carbonate combined selenium negatively correlated with the selenium in the fringe. However there are no clear correlations between the soluble and ion exchangeable selenium and the selenium in any part of the rice plants. All these indicated that the properties of the paddy soils in the field have different influence compared to that of pot experiment. The selenium content in the different organs of rice was influenced by the interaction of soil pH, organic matter content, and the speciation of selenium. |
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| Keywords: | Paddy-Soil Rice Selenium Speciation analysis |
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