| 引用本文: | 林光号,施浩杰,王旭东,等.干旱条件下施用生物炭对水稻镉吸收和转运的影响[J].灌溉排水学报,2026,45(4):49-53. |
| LIN Guanghao,SHI Haojie,WANG Xudong,et al.干旱条件下施用生物炭对水稻镉吸收和转运的影响[J].灌溉排水学报,2026,45(4):49-53. |
|
| 摘要: |
| 【目的】探究干旱条件下施用生物炭对水稻镉（Cd）吸收和转运的影响。【方法】基于盆栽试验，设置干旱和常规水分管理与0、20、40、60 t/hm2不同生物炭施用量处理，研究干旱条件下不同生物炭施用量对Cd污染稻田土壤养分、有效态Cd量及水稻生长和Cd积累的影响。【结果】施用生物炭提高了土壤pH值，显著提升了土壤有机质、碱解氮、有效磷、速效钾量及蔗糖酶活性；降低了土壤有效态Cd量，其中40 t/hm2生物炭施用量处理下的土壤有效态Cd量最低，显著降低了水稻各部位Cd量。【结论】干旱条件下施用40 t/hm2生物炭对降低水稻Cd吸收的效果最为显著。 |
| 关键词: 镉污染；生物炭；水分管理；水稻 |
| DOI：10.13522/j.cnki.ggps.2025153 |
| 分类号: |
| 基金项目: |
|
| Effects of biochar on Cd uptake and translocation in rice plants under drought conditions |
|
LIN Guanghao, SHI Haojie, WANG Xudong, LI Ronghui, YE Zhengqian
|
|
1. Changshan County Bureau of Agriculture and Rural Affairs, Quzhou 324200, China;
2. Key Laboratory of Soil Remediation and Quality Improvement of Zhejiang Province, College of Environment and Resources,
Zhejiang A & F University, Hangzhou 311300, China; 3. Beautiful Rural Construction Center in Quzhou, Quzhou 324000, China
|
| Abstract: |
| 【Objective】Cadmium (Cd) contamination in paddy soils threatens rice safety and human health, and the increasing frequency of drought events under climate change may further influence Cd availability and its uptake by rice plants. This study aims to investigate the effects of biochar on Cd uptake and translocation in rice under drought conditions and to provide a mitigation strategy for the safe production of rice under future extreme climatic conditions.【Method】The experiment was conducted in pots repacked by soil collected from a paddy field and amended with different biochar application rates. During the experiment, we measured soil nutrients, bioavailable Cd concentration, plant growth traits, and Cd uptake and translocation within rice plants.【Result】Amending the soil with biochar moderately increased soil pH and significantly enhanced soil organic matter content, alkaline hydrolyzable nitrogen, available phosphorus, available potassium, and sucrase activity, while reducing the bioavailable Cd content in the soil. The lowest bioavailable Cd concentration was observed when the biochar application rate was 40 t/hm2. Furthermore, biochar application significantly reduced Cd translocation within rice plants.【Conclusion】Among all the treatments, applying 40 t/hm2 biochar under drought conditions was the most effective for reducing Cd uptake and its subsequent translocation in rice plants. Therefore, biochar application can serve as an effective remediation strategy to safeguard rice production in Cd-contaminated paddy fields under drought conditions. |
| Key words: cadmium contamination; biochar; water management; rice |
