CAJ | 학술논문

对北京不同地区（景山公园、奥林匹克公园、水关长城景区、松山自然保护区）土壤重金属元素（ Cu、Cr、Pb、Zn）污染程度和植物叶片富集能力进行测定分析，筛选出在不同污染条件下对重金属富集较强的乔木树种。结果表明：从市区→郊区→远郊的自然保护区均存在土壤重金属污染，污染程度由大到小的排序为景山公园（中度污染，PN＝2．88）、松山自然保护区（轻度污染，PN＝1．55）、奥林匹克公园（轻度污染，PN＝1．54）、水关长城（轻度污染，PN＝1．44）。4个采样点柳树叶片对Cu的富集系数分别为0．17、0．42、0．52、0．51，均大于其他树种；国槐、侧柏和雪松对Cr的富集能力较强，其中景山公园侧柏为0．11，是各地区各树种最高值；国槐、侧柏、银杏和油松对Pb的富集能力较强；除银杏外其他树种对Zn的富集能力均较强，富集系数为0．14～0．76。国槐、柳树、银杏、侧柏、油松、雪松和白皮松叶片对重金属综合富集系数与土壤综合污染指数呈明显的二次多项式关系，R值分别为0．9444、0．8959、0．9444、0．9031、0．9993、0．9963和0．9192（p＜0．01），表现为叶片对重金属的综合富集能力随土壤重金属综合污染指数的升高而减弱；中度土壤污染下，各树种综合富集能力由大到小排序为国槐、柳树、侧柏、雪松、白皮松、银杏、油松；轻度污染下各树种综合富集能力由大到小排序为柳树、国槐、白皮松、油松、雪松、侧柏、银杏。
대북경불동지구（경산공완、오림필극공완、수관장성경구、송산자연보호구）토양중금속원소（ Cu、Cr、Pb、Zn）오염정도화식물협편부집능력진행측정분석，사선출재불동오염조건하대중금속부집교강적교목수충。결과표명：종시구→교구→원교적자연보호구균존재토양중금속오염，오염정도유대도소적배서위경산공완（중도오염，PN＝2．88）、송산자연보호구（경도오염，PN＝1．55）、오림필극공완（경도오염，PN＝1．54）、수관장성（경도오염，PN＝1．44）。4개채양점류수협편대Cu적부집계수분별위0．17、0．42、0．52、0．51，균대우기타수충；국괴、측백화설송대Cr적부집능력교강，기중경산공완측백위0．11，시각지구각수충최고치；국괴、측백、은행화유송대Pb적부집능력교강；제은행외기타수충대Zn적부집능력균교강，부집계수위0．14～0．76。국괴、류수、은행、측백、유송、설송화백피송협편대중금속종합부집계수여토양종합오염지수정명현적이차다항식관계，R치분별위0．9444、0．8959、0．9444、0．9031、0．9993、0．9963화0．9192（p＜0．01），표현위협편대중금속적종합부집능력수토양중금속종합오염지수적승고이감약；중도토양오염하，각수충종합부집능력유대도소배서위국괴、류수、측백、설송、백피송、은행、유송；경도오염하각수충종합부집능력유대도소배서위류수、국괴、백피송、유송、설송、측백、은행。
We studied the soil pollution by heavy metals (Cu, Cr, Pb and Zn) and the concentration capacity of plant leaves to these metals in Jingshan Park, Olympic Park, Great Wall at Shuiguan and Songshan Nature Reserve in Beijing to figure out the arbor species with strong concentration capacity to heavy metals.The soil heavy metal pollution is in nature reserve from urban district to suburbs to outer suburbs with pollution degrees of Jingshan Park (moderately polluted, PN=2.88), Songshan Nature Reserve (mild pollution, PN=1.55), Olympic Park (mild pollution, PN=1.54), and Great Wall at Shuiguan (mild pollution, PN=1.44).The concentration capacities of the leaves of Babylonica to Cu are 0.17, 0.42, 0.52, and 0.51, higher thanother tree species, in four sampling points.The concentration capacities of Sophora, Platycladus and Cedrus leaves to Cr are relatively stronger , with the highest concentration factors of 01.1 for Platycladus in Jingshan Park.The concentration capacities of Sophora, Platycladus, Ginkgo biloba and Tabuliformis leaves to Pb are relatively stronger.In addition to Ginkgo biloba, the concentration capacities of other species leaves to Zn are relatively stronger, and the concentration factors are both between 0.14 and 0.76.The relationship between the synthetic concentration factor of the leavesof Sophora, Babylonica, Ginkgo biloba, Platycladus, Tabuliformis, Cedrus and Bungeana and soil synthetic pollution index is expressed by a quadratic polynomial, with R of 0.944 4, 0.895 9, 0.944 4, 0.903 1, 0.999 3, 0.996 3 and 0.919 2 (p<0.01), and the synthetic concentration capacity of the leaves to heavy metals decreases with the increase of soil synthetic pollution index.In the moderate soil pollution, the syntheticconcentration capacities of species are in the de-scending order of oS phora, Ba byloin ca, Platycladus,C edrus, Bungeana, Ginkgo biloba, and Tabuliformis.While in mild soil pollution, the synthetic concentration capacities of species are in the descending order of Babylonica, Sophora, Bun-geana, Tabuliformis, Cedrus, Platycladus, and Ginkgo biloba.