摘要
采用氢化物发生–原子荧光光谱法(HG–AFS)对湘西9种中药材药用部位中硒含量及其根际土壤硒赋存形态迚行了分析,通过对比不同中药材药用部位生物富集系数来探讨其富硒能力。结果表明:以根茎入药的金荞麦、贝母、大黄、玉竹、黄精中硒含量依次降低,分别为1.01、0.35、0.25、0.24、0.20 mg/kg;以全草入药的小米草、赶山鞭、见血清、虎耳草中硒含量依次降低,分别为1.29、1.17、0.90、0.54 mg/kg。供试中药材硒含量均属于富硒及高硒中药材,金荞麦和小米草具有较好的硒富集能力,适合发展富硒中药材的种植栽培。中药材根际土壤总硒含量平均为1.42 mg/kg,达到富硒土壤标准。湘西中药材根际土壤硒形态主要为残渣态和有机硫结合态,其次为铁锰氧化物结合态,可溶态和可交换态占比较小。
Using hydride generation-atomic fluorescence spectrometry(HG-AFS), we analyzed the total selenium content in the medicinal parts and the forms of selenium in the rhizosphere soil in nine Chinese medicinal materials of west Hunan. Comparative analysis of the enrichment factor in the medicinal parts of the Chinese medicinal materials to explore its selenium-enriching capacity. The results showed that the contents of selenium in Fagopyrum dibotrys, Fritillaria, Rheum palmatum L., Polygonatum odoratum and Polygonatum sibiricum were decreased in the order of 1.01, 0.35, 0.25, 0.24, 0.20 mg/kg, respectively. The contents of selenium in Euphrasia pectinata Ten, Hypericum attenuatum Choisy, Liparis nervosa and Saxifraga stolonifera Curt. decreased in turn, 1.29, 1.17, 0.90, 0.54 mg/kg, respectively. All the studied Chinese herbal medicines belongs selenium-enriched and high-selenium herbal. The Fagopyrum dibotrys and the millet grass were of good selenium enrichment capacity and are suitable for the cultivation for selenium-rich Chinese herbal medicine. The total selenium content in the rhizosphere soil was 1.42 mg/kg in avaverage, which reached the standard of selenium-enriched soil. The RES-Se and OM-Se accounted for the major selenium form in the rhizosphere soil and FMO-Se, SOL-Se as well as EX-Se followed.
作者
朱磊
胡婷
刘德明
向昌国
刘永贤
ZHU Lei;HU Ting;LIU Deming;XIANG Changguo;LIU Yongxian(Key Laboratory of Forest and Chemical Industry Engineering,Jishou University,Zhangjiajie,Hunan 427000,China;College of Resources and Environmental Sciences,China Agricultural University,Beijing,100193,China;Center of Analytic Service,Hunan Agricultural University,Changsha,Hunan 410128,China;Institute of Agricultural Resources and Environmental Research,Guangxi Academy of Agricultural Sciences,Nanning,Guangxi 530007,China)
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第2期162-165,193,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
生态旅游湖南省重点实验室开放性课题(JDZ201706)
吉首大学科研项目(JDY44)
广西科技重大专项(桂科AA17202026)
关键词
中药材
硒
富硒土壤
硒形态
湘西
Chinese medicinal materials
selenium
selenium-enriched soil
selenium forms
west Hunan
