CAJ | 학술논문

以锌镉超积累植物伴矿景天为供试植物，采用单边根袋法盆栽试验研究了铵态氮肥和硝态氮肥施用对植物根际和非根际土壤中Zn、Cd的化学行为，以及伴矿景天生物量和Zn、Cd吸收性的影响。结果表明，施用硝态氮肥更能提高根际土壤Zn和Cd的生物有效性，显著增大植物体内Zn和Cd浓度（P<0.05），增率分别为38.2%和110%，但施用铵态氮肥更有利于促进伴矿景天的生长，增率为49.4%；氮肥形态对伴矿景天生物量的影响显著大于对植物地上部Zn、Cd浓度的效应，施用铵态氮肥显著提高Zn和Cd总吸收量，增率分别为53.3%和123%，施用硝态氮肥对其则无显著影响。施用铵态氮肥较硝态氮肥更能提高伴矿景天的污染土壤Zn、Cd吸取修复效率。
이자력초적루식물반광경천위공시식물，채용단변근대법분재시험연구료안태담비화초태담비시용대식물근제화비근제토양중Zn、Cd적화학행위，이급반광경천생물량화Zn、Cd흡수성적영향。결과표명，시용초태담비경능제고근제토양Zn화Cd적생물유효성，현저증대식물체내Zn화Cd농도（P<0.05），증솔분별위38.2%화110%，단시용안태담비경유리우촉진반광경천적생장，증솔위49.4%；담비형태대반광경천생물량적영향현저대우대식물지상부Zn、Cd농도적효응，시용안태담비현저제고Zn화Cd총흡수량，증솔분별위53.3%화123%，시용초태담비대기칙무현저영향。시용안태담비교초태담비경능제고반광경천적오염토양Zn、Cd흡취수복효솔。
Different forms of nitrogen affect not only plant growth and metabolism, but also heavy metal absorption by plants. A pot experi-ment was conducted to study the effects of different nitrogen forms(either NO-3 or NH+4)on soil solution Zn and Cd concentrations in rhi-zospheric and bulk soils, and biomass and Zn and Cd uptake of metal hyperaccumulator Sedum plumbizincicola using a unilateral root bag method. Application of NO-3 increased bio-availability of Zn and Cd in rhizospheric soil and thus the concentrations of Zn and Cd in Sedum plumbizincicola. In NO-3 treatment, plant Zn and Cd concentrations were respectively 38.2%and 110%greater than the control. However, NH+4 treatment had no effects on bioavailability and plant concentrations of Zn and Cd, but enhanced plant biomass by 49.4%. Different ni-trogen forms showed greater effects on the biomass than on plant Zn and Cd concentrations. Treatment with NH+4 significantly increased total amount of plant Zn and Cd uptake by 53.3%and 123%, respectively, but NO-3 did not. These results indicate that applying ammonium fer-tilizer would enhance phytoextraction efficiency of Zn and Cd contaminated soils by Sedum plumbizincicola.