关键词: 干旱区, 土壤根系体系, Pb、Ni行为, 土壤环境影响

Abstract: Through the investigation of the influence of soil properties on the behavior of lead (Pb) and nickel (Ni) in soil-root system under actual conditions, this paper has found that: the content of Pb or Ni in soil strongly affected its transfer from soil to spring wheat root. Most co-exist elements acted the positive effects on the elements Pb and Ni transportation in soil-root system; The slope of the soil-root relationship of element Pb or Ni was lower. The pH value and the contents of clay and coarse silt had the negative effects, and the contents of P₂O₅ and sand had the positive effects on the Pb movement. The coarse silt had the negative effect, and the content of sand had the positive effect, on the Ni movement; The transfer level of unessential element Pb from soil to crop-root mainly depended on its amount in soil, but element Ni did not.

Key words: arid zone, soil and root system, behavior of Pb and Ni, influence of soil properties