摘要
为筛选出对具有修复石油污染土壤能力的植物,针对陕北油田区土壤,以当地野生和种植的植物为筛选对象,通过野外调查和盆栽试验,研究了不同土壤石油烃浓度下植物的种子萌发、植株生长状况和土壤石油烃降解率。结果表明,在9、17、35 g·kg–1的土壤石油浓度下,狗尾草(Setaria viridis)、沙打旺(Astragalus adsurgens)、紫花苜蓿(Medicago sativa)和草木犀(Melilotus officinalis)4种植物发芽受石油污染影响较小,与对照组相比其相对发芽率都达到60%以上,这3个污染浓度下的平均相对发芽率都达到约80%以上。进一步的生长试验表明,狗尾草和沙打旺生长期对石油污染的耐受性较差,紫花苜蓿和草木犀对石油污染物有较好的耐受性和降解率,具有修复石油浓度在17 g·kg–1以下土壤的潜力。
For screening out weed plant with high oil patience and rhizosphere degradation rate of petroleum hydrocarbon, series of pot tests were applied to investigate the effect of petroleum on seed germination rate and seeding growth and the remediation capability to treat petroleum contaminated soil of weed plants. The results show that under 9, 17 and 35 g·kg^–1 oil concentrations of soil, Setaria viridis, Astragalus adsurgens, Medicago sativa and Melilotus officinalis were less affected by oil pollution. Compared with the control group, the relative germination rate of 4 species of plant was more than 60% at low, middle and high oil concentration, and average relative germination rate reached above 80%. Further growth tests showed that S. viridis and A. adsurgens were poor growing under oil pollution, whereas M. sativa and M. officinalis had better tolerability and higher oil degradation rate. M. sativa and M. officinalis had potential to repair petroleum contamination soil with the oil concentration below 17 g·kg^–1.
出处
《生态科学》
CSCD
2015年第1期148-153,共6页
Ecological Science
基金
陕西省教育厅科研计划项目(12JK0642)
国家级大学生创新创业训练计划项目(201410719013)
陕西省高水平大学建设专项资金资助项目(2013SXTS03)
关键词
陕北
石油污染
植物修复
种子萌发
植物筛选
Northern Shanxi Province
petroleum contamination
phytoremediation
seed germination
screening of plants
