摘要
对大田环境土壤小麦根系体系Pb、Ni行为环境影响的调查研究表明 :同种元素的影响程度最大 ,共存元素对Pb、Ni行为的影响多表现为协同效应 ;Pb、Ni由土壤向根系迁移的趋势较弱 ;pH值、粘粒及粗粉砂粒含量与根系Pb含量呈负相关 ,P和砂粒含量与根系Pb含量呈正相关 ,其它分析因子值与根系Pb含量不相关 ;粗粉砂粒组成与根系Ni含量呈负相关 ,砂粒组成与根系Ni含量呈正相关 ,其它分析因子值与根系Ni含量不相关。多元逐步回归分析表明 :Pb是影响根系同种元素吸收的主要因子 。
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 P 2 O 5 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.
出处
《中国沙漠》
CSCD
北大核心
2001年第1期34-38,共5页
Journal of Desert Research
基金
国家自然科学基金重点项目 !( 497310 10 )
