CAJ | 학술논문

[目的]探讨柳树对单一或复合重金属的耐性大小,为木本植物修复重金属污染土壤提供理论依据.[方法]采用根生长法研究重金属Cu2+、Pb2+、Zn2+及3者混合液对柳树枝条不定根生长的影响.调查项目包括柳树枝条不定根的数目及长度,并由此计算生根率、抑制率和耐性指数.[结果]不同浓度的重金属溶液对柳树枝条不定根的生长存在显著影响.当Cu2+浓度高于15 mg/L、混合溶液浓度高于20 mg/L、Zn2+浓度高于30mg/L时,柳树枝条均无不定根生成;溶液浓度达到40 mg/L时,只有Pb2+处理组能长出不定根;随着溶液浓度的升高,柳树枝条不定根的数目逐渐下降;浓度为5 mg/L的 Zn2+处理组柳树枝条不定根数目最多.其他浓度中,Pb2+处理组不定根数目最多、根长及平均根长最长、生根率最高.[结论]柳树枝条对Pb2+的耐受性最强,对Cu2+的耐受性最弱.柳树对3种重金属及3者混合液的耐受性大小依次为Pb2+> Zn2+> Cu2++Pb2++Zn2+> Cu2+.
[목적]탐토류수대단일혹복합중금속적내성대소,위목본식물수복중금속오염토양제공이론의거.[방법]채용근생장법연구중금속Cu2+、Pb2+、Zn2+급3자혼합액대류수지조불정근생장적영향.조사항목포괄류수지조불정근적수목급장도,병유차계산생근솔、억제솔화내성지수.[결과]불동농도적중금속용액대류수지조불정근적생장존재현저영향.당Cu2+농도고우15 mg/L、혼합용액농도고우20 mg/L、Zn2+농도고우30mg/L시,류수지조균무불정근생성;용액농도체도40 mg/L시,지유Pb2+처리조능장출불정근;수착용액농도적승고,류수지조불정근적수목축점하강;농도위5 mg/L적 Zn2+처리조류수지조불정근수목최다.기타농도중,Pb2+처리조불정근수목최다、근장급평균근장최장、생근솔최고.[결론]류수지조대Pb2+적내수성최강,대Cu2+적내수성최약.류수대3충중금속급3자혼합액적내수성대소의차위Pb2+> Zn2+> Cu2++Pb2++Zn2+> Cu2+.
[Objective] The research aimed to discuss the tolerance of Salix matsudana to single or compound heavy metals and provide theoretical basis for renovating polluted soil by heavy metals with woody plants. [Method] Using root elongation method, the effects of heavy metal Cu2+, Pb2+, Zn2+ and their mixed solution on the adventitious roots growth of S. matsudana cuttings were studied. [Result] The adventitious roots growth of S. matsudana cuttings was obviously affected by different concentrations of heavy metals solution. Adventitious roots of S. matsudana cuttings could not grow while the concentration of Cu2+ was higher than 15 mg/L, the mixture solution concentration was higher than 20 mg/L and Zn2+ concentration was higher than 30 mg/L. When the solution concentration reached 40 mg/L, adventitious roots of S. matsudana cuttings could grow only in Pb2+ treatment group. With the increasing of the solution concentration, the number of adventitious roots of S. matsudana cuttings gradually decreased. In 5 mg/L Zn2+ treatment group, the number of adventitious roots of S. matsudana cuttings was the most, the longest root length and average root length were the longest and the rooting rate was the highest. [Conclusion] The tolerance of S. matsudana to Pb2+ was strongest and its tolerance to Cu2+ was the weakest. The tolerance order of S. matsudana to three kinds of heavy metals and their mixed solution was as following: Pb2+ > Zn2+ > Cu2++Pb2++Zn2+ > Cu2+.