CAJ | 학술논문

为重金属污染土壤的修复提供依据，采用定位观测试验，研究黄壤种植多年生黑麦草6年间土壤和植株重金属 As、Hg、Pb、Cr、Cd 含量的变化。结果表明：1）多年生黑麦草从根部向地上部运输重金属的能力顺序为 Cd＞Cr＞As＞Pb＞Hg，地上部对重金属的富集能力顺序为 Cd＞Cr＞Pb＞As＞Hg，对 Cr、Pb、As、Hg 的富集能力弱，对 Cd 为中等富集能力；根系对重金属的富集能力顺序为 Pb＞Cd＞Cr＞ Hg＞As，对 As 富集能力弱，对 Pb、Cd、Cr、Hg 为中等富集能力。根系对重金属的富集能力总体比地上部强。2）经过6年种植黑麦草，土壤中 As、Pb、Cr、Cd 含量分别比种植初期降低了52．71％、45．12％、48．32％、59．15％，单项污染指数分别由种植前的2．67、0．31、1．92和3．48降低为1．26、0．17、0．99和1．42，重金属污染得到不同程度的修复。
위중금속오염토양적수복제공의거，채용정위관측시험，연구황양충식다년생흑맥초6년간토양화식주중금속 As、Hg、Pb、Cr、Cd 함량적변화。결과표명：1）다년생흑맥초종근부향지상부운수중금속적능력순서위 Cd＞Cr＞As＞Pb＞Hg，지상부대중금속적부집능력순서위 Cd＞Cr＞Pb＞As＞Hg，대 Cr、Pb、As、Hg 적부집능력약，대 Cd 위중등부집능력；근계대중금속적부집능력순서위 Pb＞Cd＞Cr＞ Hg＞As，대 As 부집능력약，대 Pb、Cd、Cr、Hg 위중등부집능력。근계대중금속적부집능력총체비지상부강。2）경과6년충식흑맥초，토양중 As、Pb、Cr、Cd 함량분별비충식초기강저료52．71％、45．12％、48．32％、59．15％，단항오염지수분별유충식전적2．67、0．31、1．92화3．48강저위1．26、0．17、0．99화1．42，중금속오염득도불동정도적수복。
To provide a reference for repairing heavy metal contaminated soil, the positioning observation experiment method was adopted to study the content variation of As,Hg,Pb,Cr and Cd in soil and L.perenne plants.Results:1)the transportation capability from root to the aboveground of L. perenne followed the sequence of Cd>Cr>As>Pb>Hg,the stem-root ratio of Cd was the highest with an average of 1;Enrichment capacity of aboveground parts was Cd>Cr>Pb>As> Hg,which was weak to Cr,Pb,As and Hg,medium to Cd;Root system enrichment capacity was Pb>Cd>Cr>Hg>As,which was weak to As and medium to Pb,Cd,Cr and Hg.The root system was of stronger enrichment capacity than the aboveground part in general.2)After six years of planting L.perenne,the contents of As,Pb, Cr and Cd decreased by 52.71%, 45.12%, 48.32% and 59.15% respectively. And the single contamination index decreased from 2.67,0.31,1.92 and 3.48 to 1.26,0.17,0.19 and 1.42 separately. The heavy metal pollution was repaired in varymg degrees.