title: [Research on the relevance of earthworms inducing soil Cd2+ absorbed by perennial ryegrass].
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 x 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).
authors.affiliation: Grassland and Environmental Science College, Xinjiang Agricultural University, Urumqi 830052, China. zcx2310@126.com
authors.forename: Chun-Xia
authors.initials: CX
authors.lastname: Zheng
authors.forename: Bo-Lang
authors.initials: BL
authors.lastname: Chen
authors.forename: Wen-Quan
authors.initials: WQ
authors.lastname: Wang
authors.forename: Xin-Pin
authors.initials: XP
authors.lastname: Zhu
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Jia
authors.forename: Jia-Qin
authors.initials: JQ
authors.lastname: Ye
mesh_terms: D000818:Animals; D002104:Cadmium / Q000378:metabolism*; D008129:Lolium / Q000378:metabolism*; D009835:Oligochaeta; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium