SHEN Lecheng,LIU Hanquan,LIAO Han,et al.Effects of Exogenous Selenium on Selenium Forms and Cadmium Enrichment in Asparagus Under Cadmium Stress[J].Northern Horticulture,2025,(12):48-58.[doi:10.11937/bfyy.20245143]
镉胁迫下外源硒对芦笋中硒形态及镉富集的影响
- Title:
- Effects of Exogenous Selenium on Selenium Forms and Cadmium Enrichment in Asparagus Under Cadmium Stress
- 文章编号:
- 1001-0009(2025)12-0048-11
- Keywords:
- asparagus; cadmium stress; exogenous selenium; enrichment
- 分类号:
- S 644.6
- 文献标志码:
- A
- 摘要:
- 以芦笋为试材,采用土培盆栽试验方法,研究了不同施用量(0、1、5 mg·kg-1)的氨基酸型液体硒肥施入不同镉污染程度（0、1、2、5 mg·kg-1）土壤,对芦笋各部位中硒含量及硒形态和镉富集的影响,以期为富硒土壤镉污染控制与农作物安全生产提供参考依据。结果表明:芦笋各个部位对硒的积累存在明显的差异,硒在芦笋中的富集规律为叶>茎>根系,主要以有机硒的形态存在,其中硒代蛋氨酸（SeMet）占比最高,达45.7%~50.7%。硒处理(1、5 mg·kg-1)后,芦笋茎硒含量分别是CK茎硒含量的5.35、52.0倍,有机硒含量占比相较于CK分别上升了48.0％、59.8%,均显著高于CK。镉在芦笋中的富集规律为根系>茎>叶,镉处理(1、2、5 mg·kg-1)后,芦笋茎镉含量分别是CK茎镉含量的7.067、56.867、480.200倍。在镉污染土壤中施入不同量的硒肥,镉胁迫下芦笋茎硒含量显著降低了41.5%～76.1%,硒处理后芦笋茎镉含量显著降低了12.3%～83.5%。综上,硒生物营养强化明显提高了芦笋不同部位硒含量及有机硒含量,土壤镉胁迫会抑制芦笋吸收富集硒元素,施入适量外源硒会缓解土壤镉胁迫作用。
- Abstract:
- Taking asparagus as the test material,a soil cultivation pot experiment was conducted to investigate the effects of different amounts (0，1，5 mg·kg-1) of amino acid liquid selenium fertilizer applied to soils with different levels of cadmium pollution (0，1，2，5 mg·kg-1) on the selenium content，selenium forms，and cadmium enrichment in various parts of asparagus,in order to provide reference for controlling cadmium pollution in selenium rich soil and ensuring crop safety production.The results showed that there were significant differences in the accumulation of selenium in different parts of asparagus.The enrichment pattern of selenium in asparagus was leaf>stem>root，mainly in the form of organic selenium.Among them，selenomethionine (SeMet) accounted for the highest proportion，reaching 45.7%-50.7%.After selenium treatment (1，5 mg·kg-1)，the selenium content in asparagus stems was 5.35 times and 52.0 times higher than that in CK stems，respectively.The organic selenium content increased by 48.0% and 59.8% compared to CK，both were significantly higher than the control treatment.The enrichment pattern of cadmium in asparagus was root system>stem>leaf.After cadmium treatment (1，2，5 mg·kg-1)，the cadmium content in asparagus stems was 7.067，56.867，and 480.200 times that of CK stems，respectively.Applying different amounts of selenium fertilizer to cadmium contaminated soil significantly reduced the selenium content of asparagus stems by 41.5% to 76.1% under cadmium stress，and the cadmium content of asparagus stems significantly decreased by 12.3% to 83.5% after selenium treatment.In summary，selenium biological nutrition enhancement significantly increased the selenium content and organic selenium content in different parts of asparagus.Soil cadmium stress could inhibit the absorption and enrichment of selenium elements by asparagus.Applying an appropriate amount of exogenous selenium could alleviate soil cadmium stress.
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备注/Memo
第一作者简介：沈乐丞（1991-），男，硕士，工程师，现主要从事富硒产品质量与安全等研究工作。E-mail:shenlecheng@163.com.责任作者：王玫（1984-），女，博士，正高级工程师，现主要从事产品质量监督与检验等研究工作。E-mail:86221574@qq.com.基金项目：国家市场监督管理总局科技计划资助项目（2022MK068）。收稿日期：2024-12-26