中文摘要：

采用温室盆栽试验研究不同浓度（0,500,1 000,1 500mg/kg）铅处理下,14种本土草本植物根系在土壤中的分布及固土抗蚀效应。结果表明：种植不同植物固土抗蚀效应差异很大,反枝苋、高丹草、紫苑随着铅浓度的增大,根系生物量、抗剪强度逐渐减小,表现出对铅较差的耐性和固土抗蚀性能;其余11种植物表现出相对较强的耐性和固土抗蚀性能。在0-10cm土层中,鲁梅克斯K-1杂交酸模、藜、紫花苜蓿在各处理下抗剪强度均大于鸭茅、新麦草及其余6种植物,因此对浅层铅污染土壤进行生物固定时,可选择固土能力较强鲁梅克斯K-1杂交酸模、藜、紫花苜蓿;在10-15cm土层中,藜、紫花苜蓿抗剪强度均大于鸭茅、新麦草及其余7种植物。因此,对较深土壤进行生物固定时,可选择固土能力较强的藜、紫花苜蓿。

英文摘要：

A pot experiment was conducted to study the distribution and effects of soil reinforcement and soil erosion resistance of roots of 14 native herbaceous plants in different Pb treatments（0, 500, 1 000, 1500 mg/kg）. The results showed that effects of soil reinforcement and soil erosion resistance in different plants had great difference. Biomass of roots and shear strength of Amaranthus retroflexus, Sorghum bicolor X S. sudanense and Aster tataricus decreased gradually with increasing Pb content which suggested the poor Pb tolerance and effects of soil reinforcement and soil erosion resistance of these plants. Other 11 plants suggested high Pb tolerance and effects of soil reinforcement and soil erosion resistance. Shear strength of Rumex patientia X R. tianschanicus cv. Rumex K-l, Chenopodium album and Medicago sativa were more than Dactylis glomerata and Psathyrostachys juncea, Dactylis glomerata and Psathyrostachys juncea were more than other 6 plants in 0--10 cm soil layer. So Rumex patientia X R. tianschanicus cv. Rumex K-l, Chenopodium album and Medicago sativa could be used in phytostabilization and revegetation in shallow layer of Pb-polluted soil. Shear strength of Chenopodium album and Medicago sativa were more than Dactylis glomerata and Psathyrostachys juncea , Dactylis glomerata and Psathyrostachys juncea were more than other 7 plants in 10-- 15 cm soil layer. So Chenopodium album and Medicago sativa could be used in phytostabilization and revegetation in deep layer of Pb-polluted soil.