摘要
通过盆栽试验,研究了水麻（Debregeasia orientalis）和醉鱼草（Buddleja lindleyana）在不同土壤磷水平下的生长响应和磷累积特征。结果表明：随着磷处理浓度（0、5、10、15、20、25、30mg·kg-1）的升高,水麻的株高、根长及生物量均升高,而醉鱼草各处理间的生物量差异不显著;水麻地上部和根部最大磷含量分别为7.57、5.07g·kg-1,醉鱼草分别为3.75、4.08g·kg-1;水麻地上部最大磷累积量为103.32mg·pot-1,而醉鱼草仅为18.07mg·pot-1;水麻和醉鱼草地上部磷富集系数分别为7.41~12.93和1.95~5.06,迁移系数分别为1.47~2.33和0.87~1.08。综上所述,水麻在富磷环境下表现出较强的适应能力和磷累积能力,醉鱼草也能适应富磷环境,但其磷累积能力较弱。因此,水麻和醉鱼草都具有高效移除土壤中过剩磷素的潜力。
A pot experiment was used to investigate growth responses of Debregeasia orientalis and Buddleja lindleyana and their uptake,accumulation characteristics in different treatment levels of phosphorus.The results showed that the plant height,root length and biomass of D.orientalis increase with the phosphorus concentration increased;however,the growth of B.lindleyana didn＇t change significantly.The highest phosphorus concentrations of D.orientalis reached 7.57 g·kg-1 in shoot and 5.07 g·kg-1 in root;while the phosphorus concentrations of B.lindleyana was lower than the former,and was only 3.75 g·kg-1 in shoot and 4.08 g·kg-1 in root.The highest total content of phosphorus in shoot were 103.32 mg·pot-1 for D.orientalis and 18.07 mg·pot-1 for B.lindleyana.The bioaccumulation factors in shoot were 7.41～12.93 for D.orientalis and 1.95～5.06 for B.lindleyana,and the translocation factors reached 1.47～2.33 for D.orientalis and 0.87～1.08 for B.lindleyana separatively.Generally,the D.orientalis has strong tolerance to phosphorus stress and phosphorus enrichment capability;the B.lindleyana also has tolerance to phosphorus,but the phosphorus enrichment capability is relatively weak.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期43-48,共6页
Journal of Agro-Environment Science
基金
四川彭州市地震灾后新农村建设综合技术集成与示范(2008BAK51B01)
四川省公益性项目(2007NGY006)
关键词
水麻
醉鱼草
磷
植物修复
富集系数
迁移系数
Debregeasia orientalis
Buddleja lindleyana
phosphorus
phytoremediation
bioaccumulation factor
translocation factor
