| 紫云英长期还田对稻田土壤Cd含量与形态的影响 |
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| 引用本文： | 谢杰,董爱琴,徐昌旭,苏金平,范芳,胡美蓉,刘佳.紫云英长期还田对稻田土壤Cd含量与形态的影响[J].浙江农业学报,2019,31(12):2084. |
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| 作者姓名： | 谢杰 董爱琴 徐昌旭 苏金平 范芳 胡美蓉 刘佳 |
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| 作者单位： | 1.江西省农业科学院 土壤肥料与资源环境研究所/国家红壤改良工程技术研究中心,江西 南昌 330200; 2.华南农业大学 资源环境学院,广东 广州 510462 |
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| 基金项目： | 国家现代农业产业技术体系(CARS-22-Z-06); 江西省教育厅科技计划(GJJ170306) |
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| 摘 要： | 为了解中长期时间尺度上紫云英翻压还田对土壤Cd垂直迁移和形态的影响,选择长年种植和翻压紫云英还田的稻田土壤进行调查,分析其对土壤pH值、有机质含量、水溶性有机物(DOM)含量、Cd含量和形态的影响。结果表明,相对于常规化肥处理,紫云英长期还田条件下,不同深度土层的pH值、有机质含量升高,土壤表层(0~20 cm)的DOM含量显著(P<0.05)升高,虽未对土壤Cd产生明显的淋洗效果,但各土层中具有生物活性的Cd形态占总Cd的比例明显升高。相较于土壤有机质含量,可溶性有机碳占土壤有机碳的比例和pH与Cd形态有更好的线性关系。
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| 关 键 词： | 淋洗 水溶性有机物 镉形态 |
| 收稿时间： | 2019-08-12 |
Impact of long-term returning of Astragalus sinicus L. on content and forms of Cd in different depths of paddy soils |
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| XIE Jie,DONG Aiqin,XU Changxu,SU Jinping,FAN Fang,HU Meirong,LIU Jia.Impact of long-term returning of Astragalus sinicus L. on content and forms of Cd in different depths of paddy soils[J].Acta Agriculturae Zhejiangensis,2019,31(12):2084. |
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| Authors: | XIE Jie DONG Aiqin XU Changxu SU Jinping FAN Fang HU Meirong LIU Jia |
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| Institution: | 1. Institute of Soil and Fertilizer & Environment and Resources/National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
2. College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510462, China |
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| Abstract: | To study the effect of cultivation and returning of Astragalus sinicus L. on vertical migration and form changes of soil Cd in medium-and long-term scale, soil samples were collected on paddy fields with long-term cultivation and returning of A. sinicus. The soil pH, contents of organic matter (OM) and dissolved organic matter (DOM), Cd content and forms were analyzed. It was shown that, the pH and the OM content in different soil layers were higher with long-term cultivation and returning of A. sinicus. Long-term cultivation and returning of A. sinicus significantly (P<0.05) increased DOM content in surface soil layer (0-20 cm), yet showed no significant leaching effect on soil Cd. However, the proportion of bioactive Cd forms in each soil layer was elevated with long-term cultivation and returning of A. sinicus. Compared to soil OM content, the ratio of dissolved organic carbon to soil organic carbon (DOC/SOC) and pH showed better linear correlation with Cd forms. |
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| Keywords: | leaching dissolved organic matter cadmium forms |
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