蚯蚓黏液对黑麦草幼苗生长及其对菲吸收的影响
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国家环保部和江苏省环保厅项目(江苏省污染土壤调查)资助


Influence of Earthworm Mucus on Ryegrass Seedling Growth and Phenanthrene Uptake
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    摘要:

    以50 mg/kg菲人工污染黄棕壤为供试土壤,设置添加蚯蚓黏液处理和不添加蚯蚓黏液对照((CK)),研究蚯蚓黏液对黑麦草幼苗生长及吸收菲的影响,添加蚯蚓黏液处理根据蚯蚓黏液浓度设置4个水平,分别为蚯蚓黏液原液浓度的2/8,3/8,1/2和1倍。结果显示:①蚯蚓黏液促进了黑麦草幼苗的生长,根系鲜重比对照增加了33.6% ~ 146%,地上部和整株生物量鲜重比对照增加了12.4% ~ 35.8% 和34.5% ~ 59.6%;②显著降低了根部菲的浓度,约23.0% ~ 49.0%,促进了黑麦草对菲的吸收,使吸收量比对照增加了约62.8%;③降低了黑麦草根系对菲的富集系数,与对照相比降低约33.7% ~ 52.6%,提高了菲在黑麦草体内的传输系数,约54.0% ~ 102.0%。

    Abstract:

    A microcosm incubation experiment was conducted to investigate the effects of earthworm (Eisenia fetida) mucus on the growth of ryegrass seedling and uptake phenanthrene. The tested soil was artificially spiked with phenanthrene (50 mg/kg) and 2 treatments (ryegrass inoculated with and without earthworm mucus) were set up. According to the different concentrations of earthworm mucus, 2/8, 3/8, 1/2 and 1 of the concentration of the original earthworm mucus were set up as the treatments. Results showed that: 1) earthworm mucus significantly enhanced the growth of ryegrass seedling, with the fresh weight biomass of root shoot and the total ryegrass seedlings increased by about 33.6%-146%, 12.4%-35.8% and 34.5%-59.6%, respectively; 2) remarkably lowered the phenanthrene concentration in root of ryegrass by approximately 23.0%-49.0%, and elevated phenanthrene uptake of ryegrass by approximately 62.8%; and 3) reduced root concentration factors and improved the translocation factor by about 33.7%-52.6% and 54.0%-102.0% respectively.

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史志明,马丽丽,胡飞龙,胡 锋.蚯蚓黏液对黑麦草幼苗生长及其对菲吸收的影响[J].土壤,2013,45(6):1091-1096. SHI Zhi-ming, MA Li-li, HU Fei-long, HU Feng. Influence of Earthworm Mucus on Ryegrass Seedling Growth and Phenanthrene Uptake[J]. Soils,2013,45(6):1091-1096

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  • 在线发布日期: 2014-01-17
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