CAJ | 학술논문

　　为了探明植物苎麻对重金属铅的耐受性及土壤修复效果，通过盆栽试验，分析了不同铅胁迫浓度处理下苎麻的生长及重金属变化特征。结果表明，低浓度处理(≤800 mg/kg)能促进苎麻植株生长，株高、茎粗和生物量都有所增加，但都以500 mg/kg胁迫处理最佳；此后随胁迫浓度增加抑制作用明显，至最高处理浓度2300 mg/kg时，各生长指标较对照显著减少，但仍能完成生长周期，表明苎麻对重金属铅胁迫具有较强的耐受性。苎麻根部与地上部铅含量在≤2000 mg/kg范围内随处理浓度提高而增加，最高值分别为173.59 mg/kg和92.31 mg/kg。地上部富集最大量为1188.36μg/pot，占全株35.47%；苎麻铅富集系数和转运系数分别为0.04~0.06和0.50~0.73。可见，苎麻对重金属铅富集能力有限，但转运能力较好，鉴于其根系发达、固土能力强和群体生物量大等特点，苎麻可作为目前重金属铅污染修复较理想的植物。
　　위료탐명식물저마대중금속연적내수성급토양수복효과，통과분재시험，분석료불동연협박농도처리하저마적생장급중금속변화특정。결과표명，저농도처리(≤800 mg/kg)능촉진저마식주생장，주고、경조화생물량도유소증가，단도이500 mg/kg협박처리최가；차후수협박농도증가억제작용명현，지최고처리농도2300 mg/kg시，각생장지표교대조현저감소，단잉능완성생장주기，표명저마대중금속연협박구유교강적내수성。저마근부여지상부연함량재≤2000 mg/kg범위내수처리농도제고이증가，최고치분별위173.59 mg/kg화92.31 mg/kg。지상부부집최대량위1188.36μg/pot，점전주35.47%；저마연부집계수화전운계수분별위0.04~0.06화0.50~0.73。가견，저마대중금속연부집능력유한，단전운능력교호，감우기근계발체、고토능력강화군체생물량대등특점，저마가작위목전중금속연오염수복교이상적식물。
In order to investigate the Pb tolerance and soil remediation effect, a pot experiment was conducted to observe the ramie growth and variation of the heavy metal in different lead stress treatment. The results showed that, Pb processing of low concentration (≤ 800 mg/kg) could promote the growth of ramie, its plant height, stem diameter and biomass showed the tendency to increase, but the 500 mg/kg stress treatment was the best. Thereafter, the inhibitory effect became obvious with increase of the stress concentration and the growth indexes reduced significantly than the control to the highest concentration 2300 mg/kg, but it still completed the growth cycle, which indicated ramie had a strong tolerance to Pb stress. The lead content of ramie roots and shoots increased with the concentration increasing (≤ 800 mg/kg range) and the highest values were 173.59 mg/kg, and 92.31 mg/kg respectively. The largest accumulation amount of Pb in shoot reached 1188.36 μg/pot, accounting for 35.47% of whole plant. The Pb factors of bioaccumulation and transfer were 0.04-0.06 and 0.50-0.73 respectively. Thence, the lead enrichment capacity of ramie was limited, but it had better transport capacity. With a view of its well-developed root system and large shoot biomass, etc., it was still the desirable plants of heavy metal Pb-contaminated soil remediation.