| Effects of adding earthworms and straw into soil on cadmium accumulation in rape |
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| DOI：10.7606/j.issn.1000-7601.2011.04.19 |
| Key Words: earthworm straw Cadmium rape phytoremediation |
| Author Name | Affiliation | | ZHU Xinping | College of Prataculture and Environment Science, Xinjiang Agricultural University, Urumqi 830052, China | | ZHENG Chunxia | College of Prataculture and Environment Science, Xinjiang Agricultural University, Urumqi 830052, China | | JIA Hongtao | College of Prataculture and Environment Science, Xinjiang Agricultural University, Urumqi 830052, China | | LI Huixin | College of Resources and Environment Science, Nanjing Agricultural University, Nanjing, 210095, China |
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| Abstract: |
| In pot experiments, earthworms and fresh straw were added into gray desert soil with different concentrations of Cd pollution to study the rape (Brassica rapa L.spp. Chinenesis) Cd accumulation in the soil system under two treatments: earthworm and straw additions. The results showed that: (1) Under different conditions of soil Cd-pollution, the addition of earthworms can effectively promote Cd in the soil to transfer into rape; earthworms c
an survive in the Cd-contaminated soil, while with the increase of Cd in the environment, Cd concentration in earthworm bodies increase too. (2) In the rape-soil system, addition of different proportions of straw into soil can promote Cd to transfer into rape bodies and rhizosphere soil, and the promotion effects are soil∶straw=1∶1>soil∶straw=2∶1>soil∶straw=1∶0; in the soil with same Cd concentration, Cd content in rape>Cd content in rhizosphere soil>Cd content in soil, which indicates that application of straw can effectively promote the accumulation of Cd in rape. |
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