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- Title
单种及混合种植对花叶芦竹铅积累量的影响.
- Authors
庄静静; 王晓冰; 郭 晖
- Abstract
We studied the effects of mixed planting pattern on the biomass, root-shoot ratio and lead accumulation of Arun- do donax, through potting experiment in outdoor, by selecting Acorus tatarinowii, Iris tectorum, Canna indica and Arundo donax as experimental materials. The mixed patterns were formed by Acorus tatarinowii + Arundo donax, Iris tectorum + Arundo donax, Canna indica + Arundo donax, and Arundo donax was taken as control. The results were as follows: (1) Compared with the single pattern, mixed planting patterns with three aquatic plants improved the root-shoot ratio of A. donax under the different concentrations of lead pollution. With the increase of lead pollution concentration, the root-shoot ratio showed an upward and then downward trend. (2) The lead content in the body and the soil of A. donax showed obvious concentration accumulation effect in the single and mixed planting patterns. The lead content in plants and soil in mixed planting patterns was significantly lower than that in the single planting pattern, and the differences were significant between single and mixed planting patterns (P<0.05). (3) Under the treatment of high concentration lead pollution, the translocation factor of A. donax was greater than 1 in the single and mixed planting patterns. However, the bioconcentration factor was greater than 1 in the low and high concentrations of lead pollution treatments. In the Canna indica + Arundo donax pattern, the lead bioconcentration factor of Arundo donax was the largest in both above-ground and below-ground parts. Therefore, we believed that Canna indica + Arundo donax pattern significantly increased the biomass and root-shoot ratio of Arundo donax, and had the best purification ability to lead contaminated soil.
- Subjects
GIANT reed; LEAD in soils; PLANT biomass; SOIL pollution; AQUATIC plants; CHEATGRASS brome
- Publication
Guihaia, 2020, Vol 40, Issue 2, p151
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaia.gxzw201905005