期刊论文

The Remediation Effect of Napier Grass to Cd-contaminated Soil with Typical Parent Materials in Southern China

中文

水土保持学报

1009-2242

2020

34

02

372-377

10.13870/j.cnki.stbcxb.2020.02.053

国家科技支撑计划项目（2015BAD05B02）； 农业部财政部重大专项（农办财函[2016]6号）；

本校为第一机构

选取南方典型母质发育耕作土紫泥田和麻砂泥,通过添加不同浓度梯度的外源Cd(0,0.5,2.0,10.0,20.0mg/kg)进行盆栽试验,并结合傅里叶红外与X射线衍射等手段,研究了象草在土壤Cd胁迫下的耐受能力及修复效果。结果表明:紫泥田与麻砂泥中象草对Cd的耐性指数为0.65~0.79,均表现出较好的耐性;外源Cd浓度为0,0.5,2.0mg/kg时象草富集系数均大于1,表现出较好的Cd富集性;象草转运系数为0.60~0.84,属于非Cd超富集植物,但因地上部分生物量巨大,象草在无外源Cd添加时对土壤Cd的修复效率依然可观,且在麻砂泥中最为显著,为2.48%。另外,土壤理化性质如pH、CEC、有机官能团等不同也可导致象草对Cd的富集呈现差异。...

Pot experiment was conducted to study the tolerance and remediation effect of Napier grass to cadmium (Cd)in purple soil and granitic sandy soil using Fourier infrared and X-ray diffraction analysis methods,and the exogenous Cd was added with gradients of 0,0.5,2.0,10.0,20.0mg/kg.The results showed that Napier grass had a good tolerance to Cd,the tolerance index was 0.65~0.79.When the concentrations of Cd were 0,0.5,2.0mg/kg,the bioconcentration factors were more than 1,showing agood ability of enrichment to Cd.Napier grass was not hyper accumulator of Cd because of transfer factors ranged fro...