| 光谱学与光谱分析 |
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| Research on the Relevance of Earthworms Inducing Soil Cd2+ Absorbed by Perennial Ryegrass |
| ZHENG Chun-xia, CHEN Bo-lang, WANG Wen-quan, ZHU Xin-pin, JIA Hong-tao*, YE Jia-qin |
| Grassland and Environmental Science College, Xinjiang Agricultural University，Urumqi 830052, China |
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Abstract Through the method of simulating the heavy metal pollution in farmland, the graphite oven (GF-990) atomic absorption was used for analyzing the regulations of the earthworms inducing the soil Cd2+ absorbed by the perennial ryegrass. The result indicated: (1) under the circumstance of the soil Cd2+ density of 3~6 mg·kg-1, the positive relevance appeared extremely remarkably that the contents of Cd2+ in underground portions of the perennial ryegrass relate to the earthworm quantity (r=0.883 2~0.986 2), but in the portion above ground the positive relevance did not appear extremely remarkably (r=0.345 5～0.325 4); And the negative relevance appeared remarkably that the contents of Cd2+ in the soil relate to the earthworm quantity (r=-0.588 7～-0.678 4). (2) Under the conditions of isometric number of earthworms, the more the density of Cd2+ in the soil, the more the increase of Cd2+ in both portions under and above ground of perennial ryegrass. (3) Under the same soil environment, the negative relevance appeared that the number of earthworms relates to the contents of Cd2+ in the earthworms (r=-0.982 0～-0.991 6).
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Received: 2010-07-26
Accepted: 2010-10-12
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Corresponding Authors:
JIA Hong-tao
E-mail: hongtaojia@126.com
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