| 引用本文: | 陈泽安,王文艺,邹 传,等.有机肥配施下控制灌溉对水稻镉吸收转运的影响[J].灌溉排水学报,2026,45(6):69-76. |
| CHEN Zean,WANG Wenyi,ZOU Chuan,et al.有机肥配施下控制灌溉对水稻镉吸收转运的影响[J].灌溉排水学报,2026,45(6):69-76. |
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| 摘要: |
| 【目的】探讨有机肥配施下控制灌溉对水稻镉（Cd）吸收、转运与再分配的影响，揭示关键器官与转运过程对稻米Cd累积的作用。【方法】以控制灌溉与有机肥配施联合管理下的Cd轻度污染稻田为研究对象，以淹灌下常规施肥处理为对照，对比分析不同处理对水稻生长及其Cd吸收转运的影响。【结果】与对照相比，控制灌溉下配施有机肥处理下的土壤有机碳量提高35.16%，且茎蘖数、株高及干物质量均显著高于其他处理。该处理也显著增强了根系对Cd的富集能力，并促进Cd由根系向茎鞘、叶片并最终向稻米的转运，使稻米中的Cd浓度与累积量分别提高93.77%、93.22%。TF茎鞘-稻米和TF叶片-稻米与稻米Cd浓度呈极显著正相关。【结论】在长期有机肥配施与控制灌溉条件下，水稻根系是Cd吸收与向地上部转运的关键器官；茎鞘和叶片的再转运显著影响Cd向稻米中的迁移，研究结果为稻米Cd风险评估与田间管理措施优化提供了科学依据。 |
| 关键词: 控制灌溉；有机肥；镉；水稻；富集系数；转运系数 |
| DOI：10.13522/j.cnki.ggps.2025210 |
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| 基金项目: |
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| The combined effect of controlled irritation and organic fertilization on cadmium uptake and transportation in rice plant |
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CHEN Zean, WANG Wenyi, ZOU Chuan, LUAN Yajun, HU Zhewei, LI Yawei, BAO Keke
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1. College of Agricultural Science and Engineering, Hohai University, Nanjing 211100, China;
2. Hefei East New Center Construction & Investment Co., Ltd., Hefei 230000, China;
3. Zhejiang Zone-king Environmental Protection Technology Co., Ltd., Hangzhou 310000, China;
4. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
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| Abstract: |
| 【Objective】Cadmium (Cd) contamination in paddy soils is a serious food safety concern and is influenced by multiple environmental and management factors. This paper investigates the combined effect of irrigation and fertilization on the uptake, translocation, and redistribution of Cd in rice plants, and elucidates the role of key organs and transport processes in Cd accumulation in rice grains.【Method】A long-term field experiment was conducted in a paddy field with moderate Cd contamination. It consisted of two treatments: controlled irrigation combined with organic fertilization, and conventional fertilization combined with continuous flooding irrigation (control). During the experiment, plant growth, Cd uptake, its translocation and redistribution in rice plants, as well as soil properties, were measured.【Result】Compared with the control, controlled irrigation combined with organic fertilization significantly increased soil organic carbon by 35.16% and improved plant growth traitors, including tiller numbers, plant height and dry matter accumulation; it also enhanced Cd enrichment in plant roots and promoted Cd translocation from roots to stem sheaths, leaves, and grains. Consequently, it increased grain Cd concentration and total accumulation by 93.77% and 93.22%, respectively, compared with the control. Grain Cd concentration was positively correlated with translocation factors from stem sheath to grain and from leaf to grain, with the correlation coefficient substantially higher than correlations with other factors.【Conclusion】The long-term experimental results demonstrate that rice roots are the primary organ for Cd uptake and its subsequent transport to aboveground tissues, while the redistribution of Cd in stems, sheaths, and leaves plays a crucial role in its translocation to grains. These findings provide a scientific basis for Cd risk assessment and optimizing water–fertilizer management practices in rice production. |
| Key words: controlled irrigation; organic fertilizer; cadmium; rice; enrichment factor; translocation factor |
