CAJ | 학술논문

为阐明苎麻修复Cd污染土壤的可行性,应用田间微区试验,研究了苎麻对Cd的耐受能力、累积特性及其对土壤Cd污染修复的潜力.结果表明.低浓度Cd处理(添加<10 mg/kg土)能促进苎麻生长,高浓度Cd处理(添加>10 mg/kg土)则引起毒害,但添加Cd浓度达到100 mg/kg土时,苎麻仍可完成正常生理周期,原麻产量仅比对照降低27.6%.苎麻出麻率受土壤Cd污染影响较小.添加Cd量在65 mg/kg内时,随添加量的增大,苎麻对Cd的富集量增加,而富集系数在10.01～4.55范围内逐渐减小.在中低程度Cd污染土壤种植苎麻可以切断食物链,产生较好的经济和环境效益,应用前景良好,但其修复Cd污染土壤需要较长时间,应进一步选育Cd超积累苎麻品种.
위천명저마수복Cd오염토양적가행성,응용전간미구시험,연구료저마대Cd적내수능력、루적특성급기대토양Cd오염수복적잠력.결과표명.저농도Cd처리(첨가<10 mg/kg토)능촉진저마생장,고농도Cd처리(첨가>10 mg/kg토)칙인기독해,단첨가Cd농도체도100 mg/kg토시,저마잉가완성정상생리주기,원마산량부비대조강저27.6%.저마출마솔수토양Cd오염영향교소.첨가Cd량재65 mg/kg내시,수첨가량적증대,저마대Cd적부집량증가,이부집계수재10.01～4.55범위내축점감소.재중저정도Cd오염토양충식저마가이절단식물련,산생교호적경제화배경효익,응용전경량호,단기수복Cd오염토양수요교장시간,응진일보선육Cd초적루저마품충.
To illuminate the phytoremediation feasibility of ramie for cadmium contaminated soil, a farmland microplot experiment was made to study the potential of tolerance, accumulate trait and remediation for Cd. The results showed that with low Cd application (<10 mg/kg soil), the growth of the ramie was improved; ramie injured when Cd concentration exceeded 10 mg/kg soil. The ramie could tolerate concentration of Cd as high as 100 mg/kg with the biomass of the aboveground of ramie was 27.6% lower than the control. The uptake of Cd by ramie increased as the addition amount (<65 mg/kg soil) of Cd increased, the bioaccumulation coefficient (BC) reduced from 4.55 to 1.01. For low or moderate Cd contaminated soil, using ramie could prevent the harm of Cd apart from the food chain, and bring great economical and environmental benefits, has bright application prospects. Forecasting result show that a longer period of time would be needed for improving the Cd contaminated soil, a further selection and cultivation of Cd hyperaccumulator ramie is essential.