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| 金花葵对硒的富集特征及其与土壤硒形态的关系 |
| Characterization of Selenium Accumulation in Hibiscus manihot L. and Its Relationships with Soil Selenium Fractions |
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| DOI： |
| 中文关键词: 金花葵 硒 富集 形态 |
| 英文关键词:Hibiseu manihot L. Selenium Accumulation Soil fractions |
| 基金项目:陕西省科技厅重点研发计划项目（2024NC-GJHX-13、2024NY-ZDCYL-04-08、2024NY-YBXM-170）；安康市科学技术研究发展计划项目（AK2023-NY-12、AK2023-GY-18）。 |
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| 摘要点击次数: 541 |
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| 中文摘要: |
| 为了研究金花葵对硒的富集特征及其与土壤硒形态的关系，采用盆栽试验，设置7个硒处理浓度（硒含量分别为0 mg/kg、4 mg/kg、8 mg/kg、12 mg/kg、16 mg/kg、20 mg/kg和24 mg/kg），研究不同土壤硒浓度对金花葵各器官硒吸收、转运和富集的影响，为金花葵富硒种植及开发利用提供数据支撑。结果表明：随土壤硒浓度的增加，金花葵TF\-茎/根、TF\-籽粒/荚和BCF\-茎、BCF\-籽粒值快速增加，硒在金花葵茎和籽粒中快速积累，各器官硒含量呈现茎＞根＞叶＞籽粒＞荚＞花的特点；在0～16 mg/kg硒处理下，土壤硒形态以残渣态硒为主，占比27.42%～61.22%；在20 mg/kg和24 mg/kg硒处理下，土壤硒形态以有机态硒为主，占比31.87%～34.24%；金花葵各器官硒含量与土壤硒形态呈显著相关（P＜0.05），相关系数在0.837以上；籽粒硒含量与荚硒含量呈正相关，茎硒含量是荚、叶和花硒含量的主要贡献因子。研究明确了金花葵对硒的富集特征及其与土壤硒形态的关系，在仅考虑土壤硒利用率方面，12 mg/kg的土壤硒浓度是富硒金花葵栽培的最适土壤硒浓度。 |
| 英文摘要: |
| A pot experiment was conducted to investigate the selenium (Se) accumulation characteristics of Hibiscus manihot L. and the relationship between Se accumulation in different plant organs and Se fractions in the soil. Seven Se concentrations (0, 4, 8, 12, 16, 20, and 24 mg/kg) were applied to the soil to examine their effects on Se uptake, translocation, and enrichment in various plant parts. The aim was to provide a scientific basis for the selenium-enriched cultivation and utilization of Hibiseu manihot L. The results showed that as soil Se concentration increased, both the translocation factors (TFs) from roots to stems and from pods to seeds, as well as the bioconcentration factors (BCFs) in stems and seeds, increased markedly. Selenium accumulated predominantly in the stems and seeds, with the Se content in plant organs following the order: stem > root > leaf > seed > pod > flower. Under Se treatments from 0 to 16 mg/kg, residual Se was the dominant soil Se fraction, accounting for 27.42% to 61.22%. In contrast, under 20 and 24 mg/kg treatments, organic-bound Se became predominant, contributing 31.87% to 34.24%. Significant correlations (P< 0.05) were found between Se contents in plant organs and soil Se fractions, with correlation coefficients exceeding 0.837. The Se content in seeds was positively correlated with that in pods, and stem Se content was identified as the primary contributor to Se levels in pods, leaves, and flowers. This study elucidates the Se accumulation characteristics of Hibiseu manihot L. and its associations with different soil Se fractions. Based solely on soil Se utilization efficiency, 12 mg/kg is recommended as the optimal soil Se concentration for the selenium-enriched cultivation of Hibiseu manihot L. |
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